Orion VCB-X, OE335-26B-VCBX-A, OE335-26B-VCBX-C Technical Manual

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VCB-X Controller

Field Technical Guide

VCB-X Controller Code: SS1051 Version 2.0 and up

Requires Modular Service Tool SD Code: SS1063 Version 1.0 and up

Requires System Manager TS II Code: SS7002 Version 2.0 and up

TABLE OF CONTENTS

OVERVIEW ....................................................................................................................................... 5

Features and Applications ........................................................................................................................................ 5

Part Number Cross Reference .................................................................................................................................7

Parts List .................................................................................................................................................................. 8

VCB-X Controller Dimensions ................................................................................................................................ 14

EM1 Expansion Module Dimensions ..................................................................................................................... 15

EM2 Expansion Module Dimensions ..................................................................................................................... 16

12 Relay Expansion Module Dimensions .............................................................................................................. 17

VCB-X Controller Components .............................................................................................................................. 18

INSTALLATION & WIRING ............................................................................................................. 19

VCB-X Input and Output Wiring ............................................................................................................................. 20

E-BUS Digital Room Sensor ............................................................................................................................. 22

E-BUS CO

Duct Mounted E-BUS CO2 Sensor ................................................................................................................... 24

Space Temperature Sensor & Slide Adjust ....................................................................................................... 25

Supply Air Temperature Sensor ........................................................................................................................ 26

Outdoor Air Temperature Sensor ...................................................................................................................... 27

E-BUS Outdoor Air Temperature and Humidity Sensor .................................................................................... 28

E-BUS Return Air Temperature and Humidity Sensor ...................................................................................... 29

Suction Pressure Transducer Kit ...................................................................................................................... 30

Digital Compressor Discharge Temperature Sensor......................................................................................... 31

Digital Compressor Unloader ............................................................................................................................ 32

Supply Fan VFD Signal ................................................................................................................................... 33

Economizer Damper Actuator ........................................................................................................................... 34

Modulating Heating Device ............................................................................................................................... 35

EM1 Expansion Module Input and Output Wiring .................................................................................................. 36

Static Pressure Transducer ............................................................................................................................. 38

Return Air Temperature Sensor ....................................................................................................................... 39

Leaving Water Temperature Sensor ................................................................................................................. 40

Building Static Pressure Sensor ....................................................................................................................... 42

Head Pressure Transducer ............................................................................................................................... 43

Building Pressure Control Output ..................................................................................................................... 44

Chilled Water Valve Actuator ............................................................................................................................ 45

Condenser Fan ECM Motor and VFD or Water Valve Actuator Wiring ............................................................. 46

Wall Mounted Sensor .................................................................................................................... 23

WattMaster Controls Inc. 8500 NW River Park Drive · Parkville , MO 64152 Toll Free Phone: 866-918-1100 PH: (816) 505-1100 · FAX: (816) 505-1101 · E-mail: mail@wattmaster.com

Visit our web site at www.orioncontrols.com

WattMaster Form: OR-VCBX-FIELD-TGD-01Q Copyright August 2014 WattMaster Controls, Inc.

is a registered trademark of AAON, Inc., Tulsa, OK.

AAON

Copeland Digital Scroll™ is a registered trademark of Copeland Corporation, Sidney, OH

www.orioncontrols.com

BACnet EBTRON® is a registered trademark of Ebtron, Inc., Loris, SC. GreenTrol Inc. Loris, SC. Paragon MicroTransEQ Series Air Flow Monitoring Station is a registered trademark of Paragon Controls, Inc., Santa Rosa, CA. Neither WattMaster Controls, Inc. nor AAON® assumes any responsibility for errors or omissions in this document. This document is subject to change without notice.

is a registered trademark of ASHRAE Inc., Atlanta, GA.

is a registered trademark of GreenTrol Automation,

VCB-X Controller Field Technical Guide

TABLE OF CONTENTS

EM2 Expansion Module Input and Output Wiring .................................................................................................. 47

Remote SAT Reset Signal ............................................................................................................................... 48

Remote Forced Cooling, Heating & Dehumidiﬁ cation ..................................................................................... 48

Return Air Bypass ............................................................................................................................................. 49

E-BUS 12 Relay Expansion Module Wiring ........................................................................................................... 50

EBTRON

MHGRV-X Controller .............................................................................................................................................. 52

MODGAS-X Controller ........................................................................................................................................... 53

START-UP & COMMISSIONING ..................................................................................................... 54

Addressing, Baud Rate & Powering Up ................................................................................................................. 54

Programming the Controller ................................................................................................................................... 55

INPUTS & OUTPUTS ..................................................................................................................... 56

SEQUENCE OF OPERATIONS ........................................................................................................ 61

Supply Fan Operation Mode .................................................................................................................................. 61

Occupied / Unoccupied Mode ................................................................................................................................ 61

HVAC Modes of Operation ..................................................................................................................................... 62

Remote Contact Control ........................................................................................................................................ 66

Space Sensor Operation ........................................................................................................................................66

IAQ (CO2) Control Operation ................................................................................................................................. 66

Morning Warm-Up / Cool-Down ............................................................................................................................. 66

Single Zone VAV .................................................................................................................................................... 67

Supply Air Temperature Setpoint Reset ................................................................................................................. 67

Airﬂ ow Monitoring .................................................................................................................................................. 68

Pre-Heater ............................................................................................................................................................. 68

Low Ambient Operation .......................................................................................................................................... 68

Heat Wheel Operation ........................................................................................................................................... 68

Duct Static Pressure Control ..................................................................................................................................68

Duct Static Pressure Control For Filter Loading .................................................................................................... 69

Building Pressure Control ...................................................................................................................................... 69

MUA Operation ...................................................................................................................................................... 69

CAV/MUA Dual Mode (Hood On/Off Operation) .................................................................................................... 70

Space Temperature Control of High Percentage Outside Air Units ....................................................................... 70

Air to Air Heat Pump Operation .............................................................................................................................. 71

Heat Pump Standard Defrost Operation ................................................................................................................ 71

Heat Pump Adaptive Defrost Operation .................................................................................................................71

Water Source Heat Pump Operation ..................................................................................................................... 72

Water Source Heat Pump Safety Monitoring ......................................................................................................... 73

Head Pressure Control .......................................................................................................................................... 74

Temperature Protection .......................................................................................................................................... 74

Outdoor Air Lockouts .............................................................................................................................................74

System Broadcasts ................................................................................................................................................ 74

, GreenTrol™, and Paragon Air Flow Measurement Digital Transmitter ...............................................51

Cooling ............................................................................................................................................................ 62

Economizer Operation ...................................................................................................................................... 63

Dehumidiﬁ cation ............................................................................................................................................... 63

Heating ............................................................................................................................................................ 65

Ventilation ........................................................................................................................................................ 65

Off Mode ........................................................................................................................................................... 65

VCB-X Controller Field Technical Guide

TABLE OF CONTENTS

Alarm Detection and Reporting .............................................................................................................................. 74

Sensor Failure Alarms ............................................................................................................................................ 75

Mechanical Failure Alarms ..................................................................................................................................... 75

Failure Mode Alarms .............................................................................................................................................. 76

Title 24 Economizer Alarms ................................................................................................................................... 76

VAV/Zone Controller Alarms ................................................................................................................................... 77

Relay Outputs ........................................................................................................................................................ 77

Trend Logging ........................................................................................................................................................ 77

TROUBLESHOOTING ..................................................................................................................... 78

LED Diagnostics .................................................................................................................................................... 78

VCB-X Controller & VCB-X EM1 Expansion Module LED Locations ..................................................................... 79

LED Operation ....................................................................................................................................................... 80

APPENDIX A .................................................................................................................................. 81

System Conﬁ gurations ........................................................................................................................................... 81

Space, Outdoor Air, or Return Air Temperature Sensor Testing ............................................................................. 85

Copeland

OE271 & OE258-01 Pressure Sensor Testing ....................................................................................................... 87

OE275-01 Suction Pressure Transducer Testing ................................................................................................... 88

Head Pressure Transducer Troubleshooting ......................................................................................................... 89

Discharge Thermistor Temperature Sensor Testing ............................................................................ 86

APPENDIX B - LCD Display Screens (Controller Interface & BACnet® Conﬁ guration) ................ 90

APPENDIX C - VCB-X BACnet® Connection to MS/TP Network, BACnet Parameters

& PICS Statement ...................................................................................................................95

INDEX .......................................................................................................................................... 106

VCB-X Controller Field Technical Guide

OVERVIEW

System Features

Features

The VCB-X Controller (OE335-26B-VCBX-A) is designed with 5 analog inputs, 3 analog outputs, 1 triac output, 4 binary inputs, and 6 relay outputs. It also has an on-board BACnet® port for connection to an MS/TP network. The Controller contains a 2 x 8 LCD character display and 4 buttons that allow for status and alarm display and force modes as well as BACnet conﬁ guration.

The VCB-X EM1 Expansion Module ( OE336-23-EM1-A) provides an additional 6 analog inputs, 4 analog outputs, 3 binary inputs, and 5 conﬁ gurable relay outputs. The VCB-X EM2 Expansion Module (OE336-23-EM2-A) provides an additional 1 analog input, 2 analog outputs, and 3 binary inputs. The VCB-X 12 Relay Expansion Module (OE358-23E-12R-A) provides up to 12 additional conﬁ gurable relay outputs.

There are also 2 E-BUS Expansion Ports which allow for the connection of the three expansion modules listed above, communicating sensors, an EBTRON® or GreenTrol Monitoring system, and future E-BUS Modules via modular cable assemblies. There are presently 5 communicating sensors available. Two of these sensors have LCD displays: E-BUS Digital Space Temperature Only Sensor or E-BUS Digital Space Temperature and Humidity Sensor. There is a communicating E-BUS Space Temperature and Humidity Sensor with no LCD display as well as an E-BUS Space CO2 Sensor, and E-BUS Duct CO2 Sensor with no LCD display.

Airﬂ ow

• Auxiliary and Emergency Heat Options for Heat

Pumps

• Air Flow Monitoring of Outdoor Air, Supply Air,

Return Air, and Exhaust Air Streams

• Air Flow Control of Outdoor Air Damper

• Single Zone VAV Control w/Optional CAV Heating

• Primary/Secondary Heating Control

• Remote Forced Cooling, Heating, and

Dehumidiﬁ cation Control

• Remote SAT Reset Signal

• Return Air Bypass Control

• Adaptive Supply Air Reset

• Selectable Mode Enable Sensor

• Fan Proving Interlock

• Dirty Filter Alarm

• Emergency Shutdown Input (Smoke Detector/

Firestat or other Shutdown Conditions)

• Drybulb/Wetbulb/Dewpoint Control of Economizer

Operation

• Building Pressure Control (Direct or Reverse

Acting)

The VCB-X Controller provides for Constant Volume, VAV, Single Zone VAV, MUA, and Air to Air Heat Pump applications.

Most common HVAC unit control applications can be conﬁ gured using only the VCB-X Controller. If the application requires more inputs and/or outputs, the optional expansion modules are available to provide for additional analog, binary, or digital inputs and outputs as required.

Other features of the VCB-X include:

• Up to 5 Total Stages of Heating and Cooling

• Direct Digital Control of Copeland Digital Scroll™ Compressor

• Modulating Cooling Output for Chilled Water Valve Control

• Modulating Heating Output ( Hot Water Valve,

Steam Valve, SCR Electric Heat Control)

• Full Integration with the AAON

Modulating Natural Gas Controller

• Full Integration with the AAON

Modulating Hot Gas Reheat Controller

MODGAS-X

MHGRV-X

• Conﬁ gurable for Heat Pump Applications

• Heat Pump Defrost Operation

• Remote Forced Occupied Capability

• Conﬁ gurable for AAON

PAC and DPAC Applications

• IAQ Economizer Reset

• Title 24 Economizer Certiﬁ ed

• 7-Day, 2-Event-per-Day Scheduling

• 14 Holiday Event Scheduling

• Daylight Savings Time Adjustment

• Trend Logging Capability

• Static Pressure Control for Filter Loading

Applications

• Heat Wheel - On/Off Control

• Head Pressure Control

• Water Source Heat Pump Monitoring

• On-board BACnet

MS/TP network (See Appendices B & C)

port for connection to an

• Advanced Dehumidiﬁ cation Capabilities

VCB-X Controller Field Technical Guide

OVERVIEW

Applications

Variable Air Volume Unit

The VCB-X can be conﬁ gured to control a VFD Supply Fan for Duct Static Pressure control. If the unit is not equipped with a VFD, but Duct Static Pressure control is needed, a modulating Zoning Bypass Damper can be controlled by the VCB-X.

VAV units are typically designed for occupied Cooling with Morning Warm-up Heating. This option is available with the VCB-X. The VCB-X can also be used for a Zoning System that needs Duct Static Pressure control and Occupied Cooling and Heating.

The VCB-X also has the ability to be conﬁ gured for Duct Static Pressure Control by controlling the Supply Fan VFD for the purpose of maintaining proper Duct Static Pressure in response to varying ﬁ lter loading conditions.

When an indoor humidity sensor is connected to the system, the VCB-X allows Dehumidiﬁ cation Priority on a VAV unit. This could be useful on a building with a very low internal sensible load, but which has a high internal and/or external latent load. During VAV Dehumidification, the VCB-X activates Cooling based on the Evaporator Coil Temperature and activates AAON Hot Gas Reheat to warm the Supply Air Temperature to the Active Supply Air Temperature Setpoint.

Constant Air Volume Unit

The VCB-X can be conﬁ gured to activate a Constant Volume Supply Fan. In most cases, this is a very basic unit with Space Temperature or Return Air Temperature control. The VCB-X can be used for kitchen, restaurant, or lab environments that are 100% Outdoor Air part of the time and Return Air part of the time. The Hood On input allows the VCB-X to know when to switch to 100% Outdoor Air control based on an exhaust hood activating. The VCB-X requires Outdoor and Indoor Air Temperature Sensors to accomplish this application.

Single Zone VAV

This is a hybrid CAV/VAV application for a unit serving a single space and using Space Temperature Setpoints to enable Heating and Cooling Modes. Heating and Cooling are controlled to their respective Supply Air Setpoints while the supply fan modulates to maintain the Space Temperature Setpoints. Single Zone VAV applications can be conﬁ gured for VAV Cooling and either VAV or CAV Heating. VAV operation requires the use of modulating Heating or Cooling sources.

Modulating

AAON® PAC (Precision Air Control)

This control scheme can only be used on Constant Volume HVAC units that are equipped with a Return Air Bypass Damper and that use a Space Temperature Sensor as the Controlling Sensor.

AAON® PAC Control provides improved moisture removal capabilities while utilizing internal space loads for reheat by redirecting the Return Air path from the upstream side of the DX Evaporator Coil to the downstream side of the coil.

For AAON® PAC conﬁ gured units, the Return Air Bypass Damper is only used during the Dehumidiﬁ cation Mode. When the VCB-X Controller is in Dehumidiﬁ cation Mode, the Return Air Bypass Damper will modulate open as the Space Temperature falls below the Cooling Setpoint. Modulation of the Return Air Bypass Damper is controlled using a proportional range from 0% (when the Space Temperature is equal to the Cooling Setpoint) up to 100% (when the Space Temperature falls to the halfway point between the Cooling and Heating Setpoints). A separate Return Air Damper Actuator will modulate the Return Air Damper slightly further towards its closed position as the Return Air Bypass Damper opens. This is to ensure that enough Return Air is bypassed around the Evaporator Coil through the Return Air Bypass Damper to raise its temperature. The rate which the Return Air Damper closes while the Return Air Bypass Damper is open is user-adjustable.

AAON® DPAC (Digital Precision Air Control)

This control scheme can only be used on Constant Volume HVAC units that are equipped with a Return Air Bypass Damper and a Copeland Digital Scroll™ Compressor. AAON® DPAC also uses a Space Temperature Sensor as the Controlling Sensor.

The AAON® DPAC control scheme provides improved moisture removal capabilities over the AAON® PAC control scheme and provides for tighter temperature control by combining a Copeland Digital Scroll™ Compressor with the Return Air Bypass Damper. Refer to AAON® PAC Control previously described for detailed Return Air Bypass Damper operation.

The Copeland Digital Scroll™ Compressor is used during both Cooling and Dehumidiﬁ cation Modes. The Return Air Bypass Damper is used only during the Dehumidiﬁ cation Mode.

Make-Up Air Unit

The VCB-X can be conﬁ gured for 100% Outdoor Air control for Make-Up Air. All HVAC Modes are determined from the Outdoor Air Sensors. The Outdoor Air Volume must always be at least 50% or higher to be conﬁ gured for Outdoor Air control.

Revised 8/14/13

VCB-X Controller Field Technical Guide

OVERVIEW

Part Number Cross Reference

PART DESCRIPTION

VCB-X Controller

VCB-X 12 Relay Expansion Module OE358-23E-12R-A

VCB-X EM1 Expansion Module

VCB-X EM2 Expansion Module OE336-23-EM2-A

Building Static Pressure Sensor OE258-01

CommLink 5 Communications Interface OE361-13

Duct Static Pressure Sensor OE271

EBC E-BUS Cable Assembly E-BUS Power & Comm 1 Ft, 1.5 Ft, 3 Ft, 10 Ft, 25 Ft, 37 FT, 50 Ft, 75 Ft, 100 Ft, 150 Ft, 250 Ft, and 1000 Foot Spool

E-BUS Adapter Hub MS000248

E-BUS Adapter Hub with 1.5 Ft. EBC Cable HZ-EBC-248

E-BUS

Adapter Board

E-BUS CO

E-BUS Digital Room Sensor - LCD Display - Temp. Only OE217-02-A

E-BUS Digital Room Sensor - LCD Display - Temp & RH OE217-03-A

E-BUS Digital Room Sensor - No LCD Display - Temp & RH OE217-04-A

E-BUS Horizontal Outside Air Temperature & RH Sensor OE265-15-A / OE265-15-C

E-BUS Vertical Outside Air Temperature & RH Sensor OE265-16-A

E-BUS Return Air Temperature & RH Sensor OE265-17-A

GPC-X Controller OE332-23-GPCX

GPC-XP Controller OE338-23-GPCXP

Immersion Well for OE230 Water Temperature Sensor OE291

IP Module Kit OE415-02

MHGRV-X Controller OE377-26-00059

MiniLink Polling Device OE364-22

MODGAS-X Controller OE377-26-00058

Modular Service Tool SD - Operator Interface OE391-12

Modular System Manager SD - Operator Interface OE392-12

Outdoor Air Temperature Sensor OE250

Return Air Temperature Sensor OE231

Standard Room Sensor - Plain OE210

Standard Room Sensor - W/ Override OE211

Standard Room Sensor - W/ Override & Slide Adjust OE213

Standard Room Sensor - W/ Slide Adjust OE212

Static Pressure Pickup Tube OE290

Strap-On Temperature Sensor Kit OE233

Suction Pressure Sensor Kit with E-BUS Adapter OE275-03-A

Supply Air Temperature Sensor OE231

System Manager TS II - Operator Interface OE392-10

USB-Link 2 Kit OE366

Water/Air Temperature Sensor OE230

Sensor with Remote Pickup - Duct Mounted OE256-07-A

Sensor - Space OE256-05-A

OE335-26B-VCBX-A OE335-26B-VCBX-C

OE336-23-EM1-A OE336-23-EM1-C

EBC-1-F-A, EBC-1.5-F-A, EBC-3-F-A, EBC-10-F-A, EBC25-F-A, EBC-37-F-A, EBC-50-F-A, EBC-75-F-A, EBC100-F-A, EBC-150-F-A, EBC-250-F-A, EBC-SPOOL-A

OE365-15-EBA-A

ORION

PART NUMBER

VCB-X Controller Field Technical Guide

Revised 9/23/13

OVERVIEW

Parts and Descriptions

PART NO. PART DESCRIPTION ILLUSTRATION PAGE NO.

OE335-26BVCBX-A

OE33623-EM1-A

OE33623-EM2-A

VCB-X Controller

The VCB-X Controller provides 5 analog inputs, 3 analog outputs, 1 triac input, 4 binary inputs, and 6 user-conﬁ gurable relays. It also has an on- board BACnet port for connection to an MS/TP network. The Controller contains a 2 x 8 LCD character display and 4 buttons that allow for status and alarm display as well as BACnet conﬁ guration. It presently allows for the addition of the EM1 Expansion Module and the 12 Relay Expansion Module described below.

NOTE:

Set-up, conﬁ guration, and monitoring of the VCB-X Controller re-

quires one of the following communication interfaces—Prism 2 Front-End Software used with a personal computer, System Manager Touch Screen, or Modular Service Tool SD.

VCB-X EM1 Expansion Module

The EM1 Expansion Module adds VAV applications, building pressure control, head pressure control, water source heat pump monitoring, and other functions. It provides 6 additional analog inputs, 3 binary inputs, 5 additional relays, and 4 analog outputs. It connects with an EBC E-BUS cable to the VCB-X Controller.

VCB-X EM2 Expansion Module

The EM2 Expansion Module adds remote forced heating, cooling, and dehumidiﬁ cation using 3 additional binary inputs. It provides 2 analog outputs for controlling a Return Air Bypass Damper and a Return Damper in Return Air Bypass applications. It also has an analog input that can be used as a remote voltage input to reset the Supply Air Setpoint or as a Title 24 Economizer feedback signal. It connects with an EBC E-BUS cable to the VCB-X Controller.

LOOPCOMM

485 DRV

T-

LT1785

ALARM

.1uF

R+

TB1

BINARY INPUTS

BIN1

BIN2

BIN3

BIN4

R38

RS-485 COMM

COM

R41

LOOP. WIRE

“R”TO“R”,

R43

COM

“T”TO“T”

R47

GND

R63

+3.3V

+5V

3650

485 DRV

T-

R+

.1uF

AI1

AI2

AI3

AI4

AI5

GND

3650

R68

4751

LT1785

C81

+12V

GND

R17

R20

R22

“SHLD”TO“SHLD”

Orion No.: OE335-26B-VCBX

ANALOG INPUTS

AI1= SPC (SPACETEMP SENSOR) AI2 AI3 AI4 AI5

BINARYINPUTS

BI1 BI2 BI3 BI4

ANALO

AO1 AO2 AO3

TRIAC OUTPUT

TR1

UNLOADER (24 VAC & UNLOAD TERMINALS)

WattMaster Label

24 VAC POWER

POLARITYMUST BE OBSERVED

CONTROLLER

www.aaon.com

VCB-X CONTROLLER

= SAT(SUPPLYAIR TEMP SENSOR) = OAT(OUTDOORAIR TEMP SENSOR) = DCT(DIGITALCOMP DISCH TEMP SENSOR) = SPACETEMPERATURE SLIDE OFFSET

= EMERGENCYSHUTDOWN = PROOF OF FLOW = DIRTYFILTER = COILTEMPSWITCH

G OUTPUTS

= FAN VFD = ECONOMIZER = MOD HEATING

= DIGITALCOMP

#SW000061 Rev.: 1A

ONLY

WARNING!

OR THE

WILLBE DAMAGED

GND

EXPANSION

+24VAC

TB3

CUTTO ISOLATE COM FROM GND

BACNET

TB7

ANALOG INPUTS

TB4

APPHB

OS HB

WDOG

SERIAL#

E-BUS

CANCEL

DOWN

www.orioncontrols.com

AAON : V28940

AAON Coil: J00142

RELAYCONTACT RATING IS 1AMP MAX @ 24 VAC

RELAY2

RELAY3

RELAY4

RELAY5

RELAY6

RELAY COMMON

EXPANSION

YS102442 REV 1

WATTMASTER CONTROLS

MADE IN USA

RLY1

RLY2

RLY3

RLY4

ENTER

RLY5

RLY6

COMMON

TB2

RELAY OUTPUTS

ALERT

3650

R82

24VAC

DIGITAL

COMP

UNLOAD

FAN

C30

ANALOG

1002

R51

OUTPUTS

2201

R59

U17

AOUT1

AOUT2

.1uF

AOUT3

C36

2201

R73 U19

GND

AOUT3AOUT1-2

GND

TB6

.1uF

STATUS 1

C46

STATUS 2

EBUS

POWER

3650

R21

3650

R109

R16

3650

R14

3650

.1uF

C21

ADDRESS

ADD

1002

OFF

1002

BAUD

LOOP

E-BUS

1002

SW1

C14

.01uF

Page 20

Page 36

YS102484

ANALOG OUTPUT TB

GNDGND

www.orioncontrols.com

GND

WattMaster Label

#L102189

CONNECT

REV 1

SERIAL#

C28 C27

3650

R35

22pF

3650

R31

3650

R29

3650

R24

22pF

PWR

ALARM

D10

STAT

D11

COMM

D13

TB2

AOUT1

1002

R32

1002

R33

AOUT2

C13

GND

ANALOG OUTPUTS

1002

R42

1002

R41

ADDRESS

1002

OFF

1002

Rev.: 1A

E-BUS

C26

.01uF

Page 47

TB1

AIN

.1uF

www.aaon.com

GND

OE336-23-EM2

1002

R12

VCB-X EM2 EXPANSION MODULE

ANALOG

1002

INPUT

1002

AAON: V35130

R58

ANALOG INPUT TB

REMOTE SATRESETSIGNAL GND

4751

TB7

D12

3001

BINARYINPUT TB

D27

BIN1

REMOTE FORCED COOLING

4751

D15

REMOTE FORCED HEATING

3001

D28

BIN2

REMOTE FORCED DEHUMID.

D18

4751

D29

BIN3

3001

RETURNAIR BYPASS DAMPER

BINARYINPUTS

RETURNAIR DAMPER

C23

L20

24 VAC POWER ONLY

C22

WARNING!POLARITYMUST BE

D22

OBSERVED OR THE CONTROLLER

D201

WILLBE DAMAGED

POWER INPUT TERMINALBLOCK

R52

+24VAC

E-BUS

CONNECT

GND

TB8

OE358-23E12R-A

VCB-X E-BUS 12 Relay Expansion Module

The VCB-X 12 Relay Expansion Module adds 12 conﬁ gurable relays to the VCB-X Control System. It connects to the VCB-X Controller with an EBC E-BUS cable.

OE210 OE211 OE212 OE213

Standard Room Sensor–Plain, w/Override, w/Override & Slide Adjust & w/Slide Adjust Only

Includes: Standard Room Sensor - Plain, with Override, with Override and Slide Adjust & with Slide Adjust only. For wall mounting. Use with VCB-X Controller only. Connects to controller via ﬁ eld fabricated wiring.

OE217-02 E-BUS Digital Room Sensor - Temp. Only

LCD Display and keypad allow for setpoint adjustment, override, and display of certain status and setpoints. The OE217-02 is used with the VCB-X Controller for room air temperature sensing applications. Uses EBC E-BUS cable.

OE217-03 E-BUS Digital Room Sensor - Temp and Humidity

LCD Display and keypad allow for setpoint adjustment, override, and display of certain status and setpoints. The OE217-03 is used with the VCB-X Controller for room air temperature and humidity sensing applications. Uses EBC E-BUS cable.

RLY-COM

RLY1

RLY2

RLY3

RLY4

RLY-COM

RLY5

RLY6

RLY7

RLY8

RELAY

EXPANSION BOARD

YS102324 REV 2

OVERRIDE ALARM

Display

OVERRIDE ALARM

Display

MADE IN USA

RLY-COM

RLY9

RLY10

RLY11

RLY12

Page 50

GND

24VAC

TMP

GND

AUX OUT

Page 25

Override

Page 22

Revised 8/7/14

VCB-X Controller Field Technical Guide

OVERVIEW

Parts and Descriptions

PART NO. PART DESCRIPTION ILLUSTRATION PAGE NO.

OE217-04 E-BUS Digital Room Sensor - Temp and Humidity

The OE217-04 is used with the VCB-X Controller for room air temperature and humidity sensing applications. Contains no LCD Display or keypad. Uses EBC E-BUS cable.

OE256-05 E-BUS CO

Used with the VCB-X for CO2 sensing applications where wall mounting

Wall-Mounted Sensor

in the space is desired. Connects to the VCB-X Controller with an EBC E-BUS cable of required length. Cable sold separately.

OE256-07 E-BUS CO

Used with the VCB-X Controller for duct mounted CO2 sensing applica-

Duct Sensor with Remote Pickup Tube

tions. Connects to the VCB-X Controller with an EBC E-BUS cable of required length. Includes: Duct Mounted CO2 Sensor, Integral Aspiration Box, Airﬂ ow Pickup Tube and 10 ft. EBC Cable.

OE265-15-A E-BUS Horizontal Outdoor Air Temperature & Humidity

Sensor

Used for outdoor temperature and humidity sensing applications. Connects to VCB-X Controller or E-BUS Adapter Hub using EBC E-BUS cable. Includes: 10k Ohm E-BUS Horizontal Outside Air Temperature & Humidity Sensor, mounted in a weatherproof handy box with attached 3 foot EBC E-BUS Cable with jack. A 10 foot EBC cable is included to connect to the VCB-X Controller. If a longer EBC cable is required, it must be ordered separately.

Page 22

Page 23

4321

<PC>

1.6

1.2

37X04

4 3 2 1

Page 24

Page 28

OE265-16-A E-BUS Vertical Outdoor Air Temperature & Humidity Sensor

Used for outdoor temperature and humidity sensing applications. Connects to VCB-X Controller or E-BUS Adapter Hub using EBC E-BUS cable. Includes: 10k Ohm E-BUS Vertical Outside Air Temperature & Humidity Sensor, mounted in a weatherproof handy box with attached 3 foot EBC E-BUS Cable with jack. A 10 foot EBC cable is included to connect to the VCB-X Controller. If a longer EBC cable is required, it must be ordered separately.

OE265-17-A E-BUS Return Air Temperature & Humidity Sensor

Used for return air temperature and humidity sensing applications. Connects to VCB-X Controller or E-BUS Adapter Hub using EBC E-BUS cable. Includes: 10k Ohm E-BUS Return Air Temperature & Humidity Sensor, mounted in a weatherproof handy box attached 3 foot EBC E-BUS Cable with jack. A 50 foot EBC cable is included to connect to the VCB-X Controller. If a longer EBC cable is required, it must be ordered separately.

OE275-03-A

Suction Pressure Transducer Kit with E-BUS Adapter

Used for suction pressure sensing applications. Connects to VCB-X Controller using E-BUS Adapter Board and EBC E-BUS cable. Includes: OE275-01 Suction Pressure Transducer, modular cable with a modular connector on one end and bare stripped wires on the other end, E-BUS Adapter, and 3 Foot EBC E-BUS cable.

4 3 2 1

37X04

1.2

1.6

<PC>

Page 29

Page 28

4 3 2 1

37X04

1.2

1.6 <PC>

Page 30

VCB-X Controller Field Technical Guide

Revised 8/8/13

OVERVIEW

Parts and Descriptions

PART NO. PART DESCRIPTION ILLUSTRATION PAGE NO.

EBC-1-F EBC-1.5-F EBC-3-F EBC-10-F EBC-25-F EBC-37-F EBC-50-F EBC-75-F EBC-100-F EBC-150-F EBC-250-F EBC-SPOOL

OE250 Outdoor Air Temperature Sensor

OE271

OE258-01

EBC E-BUS Cables

The EBC E-BUS Expansion Cables attach to the VCB-X Controller, VCB-X Expansion Modules, and E-BUS Sensors. The EBC E-BUS cables can be crimped and clamped to the E-BUS connector. Different lengths can be joined together using an E-BUS extension adapter. The EBC E-BUS Cables are available in 1, 1.5, 3, 10, 15, 25, 37, 50, 75, 100, 150, 250 & 1000 feet lengths. Includes: EBC E-BUS Cable Assembly.

Used for temperature sensing applications. Includes: 10k Ohm Outside Air Temperature Sensor, 2 wire, mounted in a weatherproof handy box only.

Duct Static Pressure Sensor

Used for duct static pressure sensing applications. Includes: 0-5″ W.C., 0-5 VDC, Static Pressure Sensor only.

Building Static Pressure Sensor

Used for Building Pressure Sensing. Includes: -0.25 to +0.25″ W.C., 0-5 VDC, 24 VAC/VDC supply power Building Pressure Sensor only.

N/A

Page 27

Page 38

Page 41

OE290

OE230 OE231

OE233 Strap-on Temperature Sensor Kit

OE291 Immersion Well for OE230 Water Temperature Sensor

OE392-10 System Manager TS II Operator Interface

Static Pressure Pick-up Tube

Used with OE271 Static Pressure Sensor for static pressure sensing applications. Includes: Static Pressure Pick-up Tube with 1 ft. length of FRP tubing, gasketed mounting bracket, and screws.

Duct Temperature Sensor - 6” Probe Duct Temperature Sensor - 12" Probe

OE230 = 6″ probe length. OE231 = 12″ probe length. Used for return or supply air temperature sensing applications. Includes: 10k Ohm Duct Temperature Sensor, 2 wire only.

Includes: 10k Ohm, Type 3, Strap-on Temperature Sensor, 2 wire. Used for water temperature sensing applications. Includes sensor, thermal mastic, and plastic mounting strap.

Includes: Stainless steel thermowell to be used with the OE230 Temperature Sensor listed above. The thermowell is designed to thread into a ½″ FPT elbow or tee in the water piping system.

The System Manager TS II provides a direct, graphic-enhanced, menudriven link to enable the system operator to view the status and adjust the setpoints of any controller on the VCB-X control system. The System Manager TS is equipped with a 4.3” 480 x 272 WQVGA RGB TFT LCD Touch Screen Display. The System Manager TS is furnished with hardware for ﬂ ush mounting into hollow drywall or surface mounting on concrete brick or plaster surfaces. Includes: System Manager TS with 12 ft. long pigtail cable assembly.

Page 38

Pages 39 & 40

Pages 40 & 41

Page 40

See System Manager Touch Screen II Technical Guide

VCB-X Controller Field Technical Guide

OVERVIEW

STATUS

Parts and Descriptions

PART NO. PART DESCRIPTION ILLUSTRATION PAGE NO.

OE391-12 Modular Service Tool SD

Includes: Modular Service Tool, power supply, communication cables, 4 Gigabyte SD card, and (4) AA batteries. Used to program and monitor all Orion controllers.

OE392-12 Modular System Manager SD

Includes: Modular System Manager SD with 4 Gigabyte SD card and 12 ft. long pigtail cable assembly. Used to program and monitor all Orion controllers. Designed for hollow core wall mounting. When System Manager is to be mounted on a solid wall (concrete), you will also need to order the solid wall mounting bracket below. Modular System Manager and communication cables.

EB101505 Solid Wall Mounting Bracket for Modular System Manager

Includes: 22 gauge galvanized sheet metal mounting bracket with mounting holes and wire routing opening. Dimensions are 9.25″W x 8.00″H x

0.50″DP. The Wall Mounting Bracket provides wiring clearance between the System Manager and the wall mounting surface when the System Manager is to be mounted on a concrete or other solid wall surface. Not for use with System Manager TS.

OE361-13 CommLink 5 Communications Interface

The CommLink 5 connects to your control system using a USB computer connection to provide direct on-site communications with the control system from a computer with the Prism 2 software installed. For remote communications, see OE415-02 IP Module Kit.

Includes: CommLink 5, 6 ft. long USB cable, and 120/24 VAC power supply. Required on all networked systems or if direct computer or remote computer connection is required. Connects to your computer’s USB 1.1 or 2.1 port. Prism 2 computer front-end software must be installed on the direct connected or remote connected computer in order to communicate with your system.

Mode Selecti on

654

708

See VCB-X Controller Operator Interfaces SD Technical Guide

See CommLink 5 Technical Guide

OE415-02

IP Module Kit - Internet/LAN Connection

Used for Internet or Local Area Network communications with the control system. Field installs by plugging into the CommLink 5 circuit board and provides an addressable Ethernet connection to the controls system from any computer connected to your building’s LAN. It can also be conﬁ gured to allow access to the control system from the Internet through your LAN if your Ethernet ﬁ rewall is conﬁ gured for this option.

Includes: IP Link module, 10 ft. long Ethernet cable, and installation instructions. Prism 2 computer front-end software must be installed on the remote computer in order to dial-up and communicate with the controls system.

OE366

USB-Link 2 Kit

The USB-Link 2 is a pocket-sized communications interface used to connect a laptop computer to your controls system for programming and monitoring purposes, utilizing a modular cable to allow connection to the service port connector on the controllers and a USB cable to connect to a laptop computer.

Includes: USB-Link 2 for multiple or single loop systems, USB cable, modular connection cable, two mini-DIN to terminal adapters, and Prism 2 software.

VCB-X Controller Field Technical Guide

See IP Module Technical Guide

See USBLink 2 Technical Guide

Revised 9/23/13

OVERVIEW

Parts and Descriptions

PART NO. PART DESCRIPTION ILLUSTRATION PAGE NO.

OE364-22 MiniLink Polling Device

Control enclosure is for indoor use only. Used with all Orion controllers to provide network communications, zone voting, alarming, and tenant logging capabilities. A MiniLink Polling Device is required on each loop of a Networked system. Includes: MiniLink Polling Device mounted in the EE000075-01 control enclosure. Control Enclosure cover is shown removed in picture.

OE508 Prism 2 Front-End Computer Software

Prism 2 provides standard, easy to understand status screens for each type of VCB-X equipment installed. Prism software has provisions for custom screens which allow ﬂ oor plans, equipment photos, or user-deﬁ ned summary screens to be implemented to meet their own individual needs. All controlling setpoints, trend logs, and alarm conditions are accessed in the Prism environment. Prism can be conﬁ gured for direct on-site installa- tion, remote modem connection, or TCP/IP Internet connection to several installations.

OE36515-EBA-A

E-BUS Adapter Board

The E-BUS Adapter Board is used for connecting the EBTRON® or GreenTrolTM Airﬂ ow Measurement Digital Transmitter to the VCB-X Control System. The E-BUS Adapter Board connects to the VCB-X Controller with an EBC E-BUS cable. Cable supplied separately.

MS000248

E-BUS Adapter Hub

The E-BUS Adapter Hub is used for connecting E-BUS devices and Controllers together with EBC E-BUS cables of varying lengths. Includes: E-BUS Adapter Hub.

CX7

RV1

CX3

VREF

CX2

LED 1

LED 2

EPROM

POWER

R25

R26

AIN1

R27

THERM

4-20mA

U12

0-10V

R31

OFF=0-5V

+5V

GND

24VAC

C11

TB2

TB1

CX1

YS101818P552

CX4

PROCESSORPBOARD

CX5

RAM

CX2

AIN2

THERM

4-20mA

0-10V

GND

AIN 2

AIN 1

CX6

PHILIPS

U10

YS101900PMINILINK

POLLING

DEVICE

REV. 1

CX1

CX6

RN2

U11

WDOG

R24

C10

RN3

LD4

PROC.

LOOP

NETWORK

DRIVER

CX15

CX14

CX13

R28

U14

U15

U13

R29

R30

LD6

LD5

NETWORK

LOCAL LOOP

LOOP

SHLD

ADD

OFF

TB3

TB4

SW1

Pages 28, 29 & 51

Pages 28 & 29

HZ-EBC-248 E-BUS Adapter Hub with 1.5 Foot EBC E-BUS Cable

The E-BUS Adapter Hub is used for connecting E-BUS devices and Controllers together with EBC E-BUS cables of varying lengths. Includes: E-BUS Adapter Hub and 1.5 foot EBC E-BUS cable.

OE437-03 Communication Surge Protector Kit

Used to isolate power surges to the communications wiring caused by lightning strikes for communications wiring loops that are routed outdoors or between buildings. One kit is required at each point where the communications wiring leaves or enters a building. Includes: Communication Bus Surge Protector, Base Module, and Mounting/Wiring Instructions.

OE310-21-LP Lighting Controller

Adds lighting control capability to the VCB-X Control System. Lighting Controller provides up to (7) independent time schedules. Provisions for photocell or light sensor light level control are also provided. Lighting Controller only provides Pilot Duty Relay Outputs. An external Lighting Contactor must be provided by others. If a Light Sensor OE259 is to be used with the Lighting Controller, it must also be ordered from WattMaster. Includes: Lighting Controller with Backplate.

OE259 Light Sensor

Ambient Light Sensor

(Use with Lighting Controller for light sensing.) 24VDC power, 1m Ohm to 1.5k Ohm output signal. Supplied with weatherproof handy box for outdoor or indoor mounting. Light Sensor threads into conduit ﬁ tting. Includes: Light Sensor and weatherproof handy box.

Pages 28 & 29

N/A

Revised 1/23/13

VCB-X Controller Field Technical Guide

OVERVIEW

Parts and Descriptions

PART NO. PART DESCRIPTION ILLUSTRATION PAGE NO.

OE377-2600058

OE377-2600059

OE332-23GPCX

MODGAS-X Controller

The

MODGAS-X Controller modulates up to (2) gas valves to maintain a desired Discharge Air Temperature. It also controls the speed of the induced draft fan to maintain proper combustion in the heat exchanger.

The MODGAS-X Controller connects to the VCB-X Controller via an EBC E-BUS cable. Available only from AAON.

MHGRV-X Controller

The MHGRV-X Controller controls a Modulating Hot Gas Reheat Valve to maintain a desired Supply Air Temperature and Dehumidiﬁ cation setpoint. The MHGRV-X Controller connects to the VCB-X Controller via an EBC E-BUS cable. Available only from AAON.

GPC-X Controller

The GPC-X Controller provides the ﬂ exibility to control, schedule, and/or monitor equipment such as unit heaters, exhaust fans, motorized louvers, etc. The GPC-X has (6) conﬁ gurable inputs which will accept signals from thermistor temperature sensors, 4-20mA or 0-5 VDC transmitters, or dry contact closures. An additional modular input is provided for connection of an OE271 Static Pressure Sensor. The GPC-X has (5) relay outputs for on/off control and (2) analog outputs. The GPC-X also has (5) separate 2-events-per-day schedules, each with its own optimal start functions built in. In addition, the GPC-X provides Lead/Lag start capabilities. Use the GPC-X to provide additional schedules for your controllers. Includes: OE332-23-GPCX Controller.

Page 53

Page 52

See GPC-X Technical Guide

OE338-23GPCXP

GPC-XP Controller

The GPC-XP Controller is used for controlling equipment or processes that cannot be controlled using a standard HVAC controller. Prism 2 computer front end software is used to interface with the GPC-XP Controller functions. The GPC-XP Controller provides the ﬂ exibility to control, schedule, and/or monitor equipment such as unit heaters, exhaust fans, motorized louvers, and other mechanical equipment. In addition, the GPC-XP provides Lead/Lag start capabilities.

The GPC-XP has 8 conﬁ gurable analog inputs which will accept signals from thermistor temperature sensors, 4-20mA or 0-5VDC or 0-10VDC transmitters. Custom forumulas created by available math functions and operators can be used in conjunction with the analog inputs to create a calculated value to be used and displayed for a speciﬁ c analog input. The inputs are set for the desired scaling by means of a jumper bar. An additional input is available for communicating sensors available from WattMaster Controls. The GPC-XP also supports 8 wet contact binary inputs which can be conﬁ gured for either normally open or normally closed operation. The GPC-XP has 8 relay outputs for on/off control and 4 analog outputs for proportional control signals. Highest/lowest/average of the analog input values can be used in the GPC-XP logic or broadcast to other controllers on the control system loop. The GPC-XP also has 8 separate 2 events per day schedules which can be assigned to any input or output for operational control or alarm recognition based on time of day. These schedules can also be conﬁ gured to broadcast to other WattMaster HVAC equipment installed on the control system loop. Includes: OE33823-GPCXP Controller.

BINARY INPUTS

ANALOG INPUTS

VDC OUTPUTS

LOOPCOMM

T-

R+

TB1

D10

D11

D12

D13

COM

TB3

0-5v

AI1

AI2

AI3

AI4

AI5

AI6

AI7

AI8

GND

TB7

+24V

+5V

GND

TB8

ON BOA COMMLI CONNEC

R38

BIN1

300

R41

BIN2

300

R43

300

BIN3

R47

300

BIN4

RLY1 =

BIN5

300

RLY2 =

300

BIN6

RLY3 =

300

BIN7

RLY4 =

R61R59R55R51

300

BIN8

AI1 =

AI2 = BI2 = AO2 =

CUTTOISOLATE COMFROMGND

AI3 = BI3 = AO3 =

AI4 = BI4 = AO4 =

AI5 = BI5 =

AI6 = BI6 =

4-20mA

THERM

AI7 = BI7 =

0-10v

AI8 = BI8 =

ANALOG

AI1

JUMPERS

AI2

AI1

AI3

AI2

AI3

AI4

AI5

AI6

AI7

AI6

AI8

AI7

OUTPUTS

AI8

+ 24VDC + 5VDC GND

RS-485 COMMUNICATION LOOP. WIRE “R”TO“R”, “T” TO “T” “SHLD” TO “SHLD”

www.wattmaster.com

OE338-23-GPC-XP

GPC-XPCONTROLLER

BI1 = AO1 =

INPUT

LEDNAME STATUS1 STATUS2

NORMALOPERATION 0 1 SCHEDULEOVERRIDE 0 2

4-20mA

0-10V

0-5V

THERM

NOTES:

1.)ANALOG INPUTJUMPER SETTINGS MUST BE SETFORYOUR SPECIFIC INPUT DEVICE REQUIREMENT.

2.) ITIS RECOMMENDEDTHATYOU WRITE THE DESCRIPTION OFTHE INPUT,AND/OR OUTPUTSYOUARE CONNECTING TO THE CONTROLLER INTHE BOXES PROVIDEDABOVE USINGAPERMANENT MARKER (SHARPIE) FOR FUTURE REFERENCE.

VDC

24 VAC POWER ONLY

WARNING!POLARITYMUST BE OBSERVED OR THE CONTROLLER WILLBE DAMAGED

GND

+24VAC

YS102432 REV 3

WATTMASTER CONTROLS

RELAYCONTACT

MADE IN USA

RATING IS 1AMP MAX @ 24 VAC

RLY1

RELAY1

RLY2

RELAY2

RLY3

RELAY3

RLY4

RELAY4

COMMON

TB2

RELAY5

RELAY

RELAY6

LEDBLINK CODES

USB PORT

OUTPUTS

TB4

RELAY7

RLY1

RELAY8

RLY2

COMMON

RLY3

RLY4

COMMON

SERIAL#

ANALOG OUTPUTS

1002

R74 U17

AOUT1

AOUT1-2

AOUT2

.1uF

AOUT3

C36

R97

1002

AOUT4

U19

AOUT3-4

GND

.1uF

C46

TB6

GND

STATUS1

STATUS2

EBUS

POWER

1002

R21

1002

R109

1002

R16

1002

R14

.1uF

C21

ADDRESS

ADD

1002

WattMaster Label

1002

E-BUS

LOOP

BAUD

#LB102095

1002

PORT

Rev.: 1C

SW1

C14

.01uF

See GPCXP Technical Guide

RLY5 =

RLY6 =

RLY7 =

RLY8 =

VCB-X Controller Field Technical Guide

OVERVIEW

VCB-X Controller Dimensions

5.50

LOOP COMM

485 DRV

T-

LT1785

.1uF

R+

TB1

BINARY INPUTS

BIN1

BIN2

BIN3

BIN4

R38

COM

R41

R43

COM

CUTTO ISOLATE

COM FROM GND

R63

GND

BACNET

T-

R+

TB7

AI1

AI2

AI3

AI4

AI5

GND

TB4

SERIAL #

R47

+3.3V

+5V

3650

R68

485 DRV

4751

LT1785

.1uF

C81

+12V

GND

3650

R17

3650

R20

3650

R22

7.85

TB3

ANALOG INPUTS

APP HB

OS HB

WDOG

2.75

YS102442 REV 1

WATTMASTER CONTROLS

MADE IN USA

RLY1

RLY2

RLY3

RLY4

RLY5

RLY6

COMMON

TB2

RELAY

OUTPUTS

ALERT

3650

R82

24VAC

DIGITAL

COMP

UNLOAD

C30

ANALOG

1002

R51

OUTPUTS

2201

R59

U17

AOUT1

AOUT2

.1uF

AOUT3

C36

2201

R73 U19

GND

AOUT3AOUT1-2

GND

.1uF

STATUS 1

C46

STATUS 2

EBUS

POWER

R21

R109

R16 R14

.1uF

C21

ADDRESS

1002

OFF

1002

SW1

C14

.01uF

Zone

TB6

3650

ADD

1 2 4 8

16 32

BAUD

LOOP

Zone

8.38

7.91

0.70

Figure 1: VCB-X Controller Dimensions

0.70

2.05

1.50

VCB-X Controller Field Technical Guide

5.00

0.20

TB7

R58

STATIC PRESSURE

TB1

GND

TEMP SENSOR INPUTS

TB2

+5V

1004

1002

SIG1

10uF

GND

1004

1002

SIG2

10uF

GND

PRESSURE SENSOR INPUTS

BIN1

BIN2

BIN3

BINARY INPUTS

OFF

ADDRESS

1002

1 2

INSTALLATION & WIRING

VCB-X EM1 Dimensions

5.83

5.34

2.67

R53

R49

R48

R46

R45

5621

RELAY CONTACT

RATING IS 1 AMP

MAX @ 24 VAC

AAON No.:

V13010

EXHAUST

CHILLED WATER

CONDENSER 2 CONDENSER 1

RELAY OUTPUT

TERMINALS

GND

PWM -

PWM +

GND

R24

R29

R31

R35

R57

1001

10uF

C24

+24 VAC

4992

1002

10uF

1002

R10

10uF

D24

1002

R15

1002

R16

10uF

D25

1002

R18

1002

R19

10uF

D26

VREF

R22 R21 C8 D8

R6 R1 C2

D12

300

D27

D15

300

D28

D18

D29

300

www.aaon.com

www.orioncontrols.com

STATIC PRESSURE SENSOR INPUT

TEMPERATURE SENSOR INPUT

TERMINALS

RETURN AIR TEMP LEAVING WATER TEMP

HEAD PRESSURE 2 GND

GND

PRESSURE SENSOR INPUT

TERMINALS

+5V

BUILDING PRESSURE

GND

HEAD PRESSURE 1

GND

BINARY INPUT TERMINALS

HOOD

REMOTE OCCUPIED

PROOF OF WATER FLOW

WattMaster Label

E-BUS

CONNECT

#L102100-A

B Rev.: 1C

VCB-X EM1 Expansion Module

Orion No.:OE336-23-EM1-A

ANALOG OUTPUT TERMINALS

CONDENSER PWM TERMINALS

POWER INPUT TERMINAL BLOCK

24 VAC POWER ONLY

WARNING! POLARITY MUST BE OBSERVED OR THE CONTROLLER WILL BE DAMAGED

E-BUS

CONNECT

YS102482 REV1

D21D20D19D17

3650

R56 R54

1001

1002

R61

1002

D10

D11

D13

AOUT1

AOUT2

AOUT3

AOUT4

GND

TB9

PWM-

PWM+

OPTIONS

5621

TB3

PWR

ALARM

STAT

COMM

TB6

SERIAL # 1 2

C26

.01uF

5.63

0.62

Figure 2: VCB-X EM1 Expansion Module Dimensions

VCB-X Controller Field Technical Guide

2.05

4.10

1.49" DEPTH

Revised 7/16/14

INSTALLATION & WIRING

VCB-X EM2 Dimensions

0.29

TB1

TB7

4.88

4.36

TB8

ANALOG

INPUT

BINARY INPUTS

C23

C22

Zone

2.00

YS102484 REV 1

AIN

.1uF

GND

1002

R12

1002

R58

D12

3001

D27

BIN1

D15

3001

D28

BIN2

D18

D29

BIN3

R52

+24VAC

GND

3001

D22

D201

www.aaon.com

OE336-23-EM2

VCB-X EM2 EXPANSION MODULE

AAON: V35130

ANALOG INPUT TB

ECONO FEEDBACK / RST SIG

4751

L20

GND

BINARY INPUT TB

REMOTE FORCED COOLING REMOTE FORCED HEATING REMOTE FORCED DEHUMID.

RETURN AIR BYPASS DAMPER

RETURN AIR DAMPER

24 VAC POWER ONLY

WARNING! POLARITY MUST BE

OBSERVED OR THE CONTROLLER

WILL BE DAMAGED

POWER INPUT TERMINAL BLOCK

+24 VAC

E-BUS

CONNECT

www.orioncontrols.com

ANALOG OUTPUT TB

GND

WattMaster Label

#L102189

GNDGND

Rev.: 1C

E-BUS

CONNECT

1002

SERIAL #

C28 C27

22pF

R32 R33

R42 R41

R2 R3

C13

1002

R35 R31 R29 R24

D10

D11

D13

AOUT1

AOUT2

ANALOG OUTPUTS

ADDRESS

OFF

3650

PWR

ALARM

STAT

COMM

TB2

GND

1 2

C26

.01uF

Figure 3: VCB-X EM2 Expansion Module Dimensions

Revised 7/16/14

2.670.67

4.29

1.49 DEPTH

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

VCB-X 12 Relay Module Dimensions

6.06

5.52

2.76

5.00

0.20

SERIAL #

RLY-COM

RLY1

RLY2

RLY3

RLY4

TB3

RLY-COM

RLY5

RLY6

RLY7

RLY8

TB2

RELAY

EXPANSION BOARD

WATTMASTER CONTROLS

YS102324 REV 2

1002

R40

COMM

RLY-COM

ADDRESS

OFF

C213

C214

1000pF

R214 R212 R211 R213

MADE IN USA

RLY9

RLY10

RLY11

RLY12

TB1

SW1

1002

R44

R43

R42

R41

GND

24VAC

POWER

ADD

1 2 4 8

1002

TB10

.1uF

5.63

Figure 4: VCB-X 12 Relay Module Dimensions

VCB-X Controller Field Technical Guide

2.050.71

4.10

1.49" DEPTH

OVERVIEW

Controller with Enclosure Components

RS-485

LOOP LED

Communication Wire Terminals

Communication Port

Binary Input Terminals

Binary Input LED - Typ. of 4

BACnet Protocessor Terminal Block

Analog Input Terminals

Troubleshooting LEDs

Communications Driver Chip

3650

R68

BACNET

485 DRV

T-

LT1785

R+

.1uF

TB7

C81

VCB-X CONTROLLER

ALARM

CANCEL

RS-485 COMM LOOP. WIRE

“R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”

VCB-X CONTROLLER

Orion No.: OE335-26B-VCBX

ANALOG INPUTS

AI1 = SPC (SPACE TEMP SENSOR) AI2

= SAT (SUPPLY AIR TEMP SENSOR)

AI3

= OAT (OUTDOORAIR TEMP SENSOR)

AI4

= DCT (DIGITALCOMP DISCH TEMP SENSOR)

AI5

= SPACE TEMPERATURE SLIDE OFFSET

BINARY INPUTS

BI1

= EMERGENCY SHUTDOWN

BI2

= PROOF OF FLOW

BI3

= DIRTY FILTER

BI4

= COIL TEMP SWITCH

G OUTPUTS

ANALO

AO1

= FAN VFD

AO2

= ECONOMIZER

AO3

= MOD HEATING

TRIAC OUTPUT

TR1

= DIGITAL COMP UNLOADER (24 VAC & UNLOAD

TERMINALS)

WattMaster Label

#SW000061

Rev.: 1A

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

GND

+24 VAC

www.aaon.com

E-BUS

EXPANSION

DOWN

www.orioncontrols.com

AAON : V28940

AAON Coil: J00142

Zone

ENTER

RELAY CONTACT RATING IS 1AMP MAX @ 24 VAC

FAN

RELAY 2

RELAY 3

RELAY 4

RELAY 5

RELAY 6

RELAY COMMON

E-BUS

EXPANSION

Zone

MADE IN USA

Relay Output Terminals

Relay Output LED - Typ. of 6

ALERT LED

Digital Compressor Unloader Spade Terminals

UNLOAD LED

Analog Output Terminals

Diagnostic Blink Code LEDs

EBUS LED

POWER LED

Address Switch

24 VAC Power Input

Figure 5: VCB-X Controller w/Enclosure Components

E-BUS Connection

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Important Wiring Considerations

General

Correct wiring of the VCB-X Controller is the most important factor in the overall success of the controller installation process. In general, most VCB-X Controllers are factory installed and wired at the AAON through your local AAON®/Orion representative for installation in the ﬁ eld. Some of the following information pertains to ﬁ eld wiring and may not apply to your installation if it was pre-wired at the factory. However, if troubleshooting of the controller is required, it is a good idea to be familiar with the system wiring, no matter if it was factory or ﬁ eld wired.

factory. It is also possible to purchase these controllers

Controller Mounting

When the controller is to be ﬁ eld mounted, it is important to mount the controller in a location that is free from extreme high or low

temperatures, moisture, dust, and dirt. See Table 1 for a list of

the required operating conditions for the VCB-X Controller and associated expansion modules.

The VCB-X Controller is housed in a plastic enclosure. It is designed to be mounted by using the 3 mounting holes in the enclosure base. The VCB-X Controller needs to be installed in an environment which can maintain a temperature range between -30°F and 150°F not to exceed 90% RH levels (non-condensing). Be careful not to damage the electronic components when mounting the controller.

Considerations

WARNING: When using a single transformer to power more

than one controller or expansion module, the correct polarity must always be maintained be tween the boards. Failure to observe correct polarity will result in damage to the VCB-X Controller and expansion modules.

Please carefully read and apply the following information when

wiring the VCB-X Controller or the Expansion Modules. See Figures 6 & 7 for VCB-X input and output wiring. See Figures 22 & 23 for the VCB-X EM1 Expansion Module wiring, Figures 34 & 35 for VCB-X EM2 Expansion wiring, and Figure 36 for the VCB-X 12

Relay Expansion Module wiring.

1. All wiring is to be in accordance with local and national electrical codes and speciﬁ cations.

2. All 24 VAC wiring must be connected so that all ground wires remain common. Failure to follow this procedure can result in damage to the controller and connected devices.

3. Minimum wire size for 24 VAC wiring should be

18-gauge.

4. Minimum wire size for all sensors should be 24-gauge.

Some sensors require 2-conductor wire and some require 3-or 4-conductor wire.

The VCB-X Controller and expansion modules must be connected to a 24 VAC power source of the proper size for the calculated VA load requirements. All transformer sizing should be based on the

VA rating listed in Table 1.

Device

Control

OE335-26B-VCB-X-A

VCB-X Controller

OE336-23-EM1-A 24VAC 5

OE336-23-EM2-A 24VAC 5

OE358-23E-12R-A 24VAC 15

Voltage

24VAC 8

VA Load

Temperature

-30°F to 150°F

(Non-

Humidity

Condensing)

90% RH

Table 1: Voltage and Environment Requirements

5. Minimum wire size for 24 VAC thermostat wiring should be 22 gauge.

6. Be sure that all wiring connections are properly inserted and tightened into the terminal blocks. Do not allow wire strands to stick out and touch adjoining terminals which could potentially cause a short circuit.

7. When communication wiring is to be used to intercon nect VCB-X Controllers together or to connect to other communication devices, all wiring must be plenum rated, minimum 18-gauge, 2-conductor, twisted pair with shield. WattMaster can supply communication wire that meets this speciﬁ cation and is color coded for the network or local loop. Please consult your WattMaster distributor for information. If desired, Belden #82760 or equivalent wire may also be used.

8. Before applying power to the VCB-X Controller, be sure to recheck all wiring connections and terminations thoroughly.

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

VCB-X Controller Input Wiring

Zone

VCB-X Controller Inputs

The VCB-X Controller is designed with 5 analog inputs, 3 analog outputs, 1 triac output, 4 binary inputs and 6 relay outputs.

There are also 2 E-BUS Expansion Ports which allow the use of communicating sensors and the E-BUS Modules.

EMERGENCY SHUTDOWN SWITCH

PROOF OF FLOW SWITCH

DIRTY FILTER SWITCH

DEFROST COIL TEMPERATURE SWITCH

SPACE

TEMPERATURE SENSOR

TEMP

WW AA

GND

RR MM EE

AUX

NORMALNORMAL

CC OO OO

OVROVR

LL EE RR

SUPPLY AIR TEMP. SENSOR

OUTDOOR AIR

TEMPERATURE SENSOR

DIGITAL COMPRESSOR

DISCHARGE TEMPERATURE

SENSOR

See Figures 6 & 7 for wiring details. Detailed wiring for all inputs

and outputs are found on the pages that follow.

VCB-X CONTROLLER

MADE IN USA

BIN1 BIN2 BIN3

BIN4 COM COM

AI1 AI2 AI3 AI4

AI5 GND GND

TB7

BACNET

ALARM

CANCEL

RS-485 COMM LOOP. WIRE

“R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”

VCB-X CONTROLLER

Orion No.: OE335-26B-VCBX

ANALOG INPUTS

AI1 = SPC (SPACE TEMPSENSOR)

= SAT(SUPPLY AIR TEMP SENSOR)

AI2

3650

R68

= OAT(OUTDOOR AIR TEMP SENSOR)

AI3

485 DRV

= DCT (DIGITALCOMP DISCH TEMP SENSOR)

T-

R+

AI4

= SPACETEMPERATURE SLIDE OFFSET

AI5

BINARY INPUTS

4751

LT1785

= EMERGENCY SHUTDOWN

BI1

.1uF

C81

= PROOF OF FLOW

BI2

= DIRTY FILTER

BI3

= COIL TEMPSWITCH

BI4

ANALO

= FAN VFD

AO1

= ECONOMIZER

AO2

= MOD HEATING

AO3

TRIAC OUTPUT

= DIGITALCOMP

TR1

UNLOADER (24 VAC & UNLOAD

TERMINALS)

WattMaster Label

#SW000061

Rev.: 1A

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

G OUTPUTS

GND

+24 VAC

www.aaon.com

E-BUS

EXPANSION

ENTER

DOWN

www.orioncontrols.com

AAON : V28940

AAON Coil: J00142

RELAYCONTACT RATING IS 1AMP MAX @ 24 VAC

FAN

RELAY2

RELAY3

RELAY4

RELAY5

RELAY6

RELAY COMMON

E-BUS

EXPANSION

Figure 6: VCB-X Controller Input Wiring

24VAC

GND

Line Voltage

Size Transformer For Correct Total Load. VCB-X Controller = 8 VA

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

VCB-X Controller Output Wiring

VCB-X Controller Outputs

The VCB-X Controller must be connected to 24 VAC as shown

in the wiring diagram below. Please see Table 1 for correct VA

requirements to use when sizing the transformer(s) used for powering the Controller.

NOTE: RELAY CONTACTS R1-R5 MAY BE CONFIGURED FOR:

1.) HEATING STAGES

2.) COOLING STAGES

3.) DIGITAL COMPRESSOR

VCB-X CONTROLLER

ALARM

CANCEL

RS-485 COMM LOOP. WIRE “R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”

VCB-X CONTROLLER

Orion No.: OE335-26B-VCBX

ANALOG INPUTS

AI1 = SPC (SPACE TEMPSENSOR) AI2

= SAT(SUPPLY AIR TEMP SENSOR)

AI3

= OAT(OUTDOOR AIR TEMP SENSOR)

AI4

= DCT (DIGITALCOMP DISCH TEMP SENSOR)

AI5

= SPACETEMPERATURE SLIDE OFFSET

BINARY INPUTS

BI1

= EMERGENCY SHUTDOWN

BI2

= PROOF OF FLOW

BI3

= DIRTY FILTER

BI4

= COIL TEMPSWITCH

ANALO

AO1

= FAN VFD

AO2

= ECONOMIZER

AO3

= MOD HEATING

TRIAC OUTPUT

TR1

= DIGITALCOMP UNLOADER (24 VAC & UNLOAD

TERMINALS)

WattMaster Label

#SW000061

Rev.: 1A

24 VAC POWER

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

G OUTPUTS

ONLY

GND

+24 VAC

www.aaon.com

E-BUS

EXPANSION

DOWN

www.orioncontrols.com

AAON : V28940

AAON Coil: J00142

ENTER

RELAYCONTACT RATING IS 1AMP MAX @ 24 VAC

FAN

RELAY2

RELAY3

RELAY4

RELAY5

RELAY6

RELAY COMMON

E-BUS

EXPANSION

MADE IN USA

4.) CONDENSER

5.) REVERSING VALVE

6.) HEAT PUMP COMPRESSOR

7.) PREHEAT

R1 R2 R3 R4 R5 R6

COMM

24 VAC

UNLOAD

AOUT1 AOUT2 AOUT3 GND GND

Also please note that when wiring the VCB-X Controller, its contacts must be wired as wet contacts (connected to 24 VAC).

8.) AUX HEAT

9.) LOW AMBIENT

10.) ALARM

11.) OVERRIDE

12.) OCCUPIED

13.) ECONOMIZER

14.) MOD HEAT ENABLE

24 VAC ONLY

SUPPLY FAN CONFIGURABLE RELAY OUTPUT #2 CONFIGURABLE RELAY OUTPUT #3

CONFIGURABLE RELAY OUTPUT #4 CONFIGURABLE RELAY OUTPUT #5

CONFIGURABLE RELAY OUTPUT #6

24 VAC POWER

NOTE: ALL RELAY OUTPUTS ARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1 AMP MAXIMUM LOAD

SUPPLY FAN VFD

COM

MODULATING HEATING

(SCR OR HOT WATER VALVE)

COM

15.) EMERGENCY HEAT

16.) MOD COOL ENABLE

17.) MORNING WARM-UP / COOL-DOWN

18.) REHEAT

19.) EXHAUST FAN

20.) HEAT WHEEL

HVAC UNIT CONNECTIONS

DIGITAL COMPRESSOR

GND

ECONOMIZER

ACTUATOR

COM1

Y13

Line Voltage

24VAC

Size Transformer For Correct Total Load. VCB-X Controller = 8 VA

Figure 7: VCB-X Controller Output Wiring

VCB-X Controller Field Technical Guide

GND

Revised 4/11/14

INSTALLATION & WIRING

E-BUS Digital Room Sensor Wiring

Zone

E-BUS Digital Room Sensor

The OE217-02 E-BUS Digital Room Temperature Sensor can be used to sense Space Temperature. The OE217-03 or OE217-04 E-BUS Digital Room Temperature Sensor can be used to sense Space Temperature and Humidity. The OE217-04 has no LCD display or keypad. The Sensor connects to the VCB-X Controller with the EBC E-BUS expansion cable. It can also be daisy-chained with a CO Sensor for applications requiring both a wall mounted CO2 sensor and space temperature sensor.

VCB-X Controller

AO2 AO3

TRIAC OUTPUT

TR1

Note: When Only The E-BUS Room Sensor Is Used, It Directly To The Controller Using A Of The

n EBC E-BUS Cable

Appropriate Length.

VCB-X

Mount At Least 5 Feet Above Floor. See For Connection When A Wall Mounted E-BUS C Sensor Is Also Used.

Connects

Figure 9

Digital

WattMaster Label #LB102093-01-A

24 VAC POWER

POLARITY MUST

The E-BUS Digital Room Sensor should be mounted at approximately 5 Ft. above the ﬂ oor on the wall in an area that does not have drafts

or is exposed to direct sunlight. See Figure 8 for wiring details.

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub or Adapter Board may be required.

= SC

= DIGITALCO

Rev.: 1C

ONLY

WARNING!

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

24 VAC

INPUT

E-BUS

EXPANSION

E-BUS

EXPANSION

OVERRIDE ALARM

Display

Override

OE217-02, OE217-03, OE217-04

E-BUS Digital Room Sensor

Figure 8: OE217-02, OE217-03, OE217-04 – E-BUS Digital Room Sensor Wiring

Revised 4/30/12

E-BUS Cable

(EBC Cable)

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Wall-Mounted E-BUS CO2 Sensor Wiring

E-BUS CO2 Wall-Mounted Sensor

The OE256-05 Wall Mounted E-BUS CO2 Sensor is used to monitor CO2 levels in the space served by the HVAC unit. The E-BUS CO Sensor connects to the VCB-X Controller with an EBC E-BUS cable. It can be daisy-chained with the E-BUS Digital Room Sensor ( OE217-02, OE217-03, OE217-04) for applications requiring both a room CO2 sensor and room temperature sensor.

VCB-X Controller

OE256-05

E-BUS Wall-Mounted

CO Sensor

It should be mounted at approximately 5 Ft. above the ﬂ oor on the wall in an area that does not have drafts or is exposed to direct

sunlight. See Figure 9 for wiring details and installation notes. A

Duct Mounted E-BUS CO2 Sensor can be used if desired instead

of the Wall Mounted E-BUS CO

Sensor. See Figure 10 for Duct

Mounted E-BUS CO2 Sensor wiring details.

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub or Adapter Board may be required.

AO2

AO3

= SC

TRIAC OUTPUT

TR1

= DIGITALCO

WattMaster Label #LB102093-01-A

Rev.: 1C

Note: Mount Both Sensors At Least 5 Feet Above Floor. The E-BUS Digital Room Sensor Connects To The E-BUS

Sensor.

OE217-02,

OE217-03, or OE217-04

E-BUS Digital Room Sensor

OVERRIDE ALARM

Display

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

24 VAC INPUT

Override

E-BUS

EXPANSION

E-BUS

EXPANSION

E-BUS Cable

(EBC Cable)

Figure 9: OE256-05 – Wall Mounted E-BUS CO2 Sensor Wiring

VCB-X Controller Field Technical Guide

Revised 4/30/12

INSTALLATION & WIRING

Duct Mounted E-BUS CO2 Sensor

Zone

Duct Mounted E-BUS CO2 Sensor

The OE256-07 Duct Mounted E-BUS CO2 Sensor with Remote Pickup Tube is used for sensing the current CO2 level in the HVAC unit’s return air stream. This is useful when you want an average CO2 reading in the area served by the HVAC unit or when you don’t want a wall mounted E-BUS CO2 Sensor due to sensor tampering concerns in the space.

The OE256-07 Duct Mounted Return Air CO2 Sensor is comprised of the CO2 Sensor, the WattMaster Aspiration Box Assembly, and a Remote Pickup Tube.

Note:

1.) The Duct Mounted E-BUS CO Sensor

Connects To The Controller Using An

VCB-X EBC E-BUS Cable Of The Required Length Or The Provided 10 Foot EBC Cable.

OE256-07 Duct Mounted

E-BUS CO Sensor

The Duct Mounted Return Air E-BUS CO2 Sensor with Remote Pickup Tube is designed to be mounted in the return air duct of the HVAC unit and uses its integral aspiration box to sample the CO

level in the duct. See Figure 10 below for wiring and installation

details.

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub or Adapter Board may be required.

MADE IN USA

BACNET

TB7

ALARM

CANCEL

RS-485 COMM LOOP. WIRE

“R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”

VCB-X CONTROLLER

Orion No.: OE335-26B-VCBX

ANALOG INPUTS

AI1 = SPC (SPACE TEMPSENSOR) AI2

= SAT(SUPPLY AIR TEMP SENSOR)

3650

R68

AI3

= OAT(OUTDOOR AIR TEMP SENSOR)

485 DRV

AI4

T-

R+

= DCT (DIGITALCOMP DISCH TEMP SENSOR)

AI5

= SPACETEMPERATURE SLIDE OFFSET

BINARY INPUTS

LT1785

BI1

= EMERGENCY SHUTDOWN

BI2

= PROOF OF FLOW

.1uF

C81

BI3

= DIRTY FILTER

BI4

= COIL TEMP SWITCH

G OUTPUTS

ANALO

AO1

= FAN VFD

AO2

= ECONOMIZER

AO3

= MOD HEATING

TRIAC OUTPUT

TR1

= DIGITALCOMP UNLOADER (24 VAC & UNLOAD TERMINALS)

WattMaster Label

#SW000061

Rev.: 1A

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

GND

www.aaon.com

E-BUS

+24 VAC

EXPANSION

ENTER

DOWN

www.orioncontrols.com

AAON : V28940

AAON Coil: J00142

RELAYCONTACT RATING IS 1AMP MAX @ 24 VAC

FAN

RELAY2

RELAY3

RELAY4

RELAY5

RELAY6

RELAY COMMON

E-BUS

EXPANSION

EBC E-BUS

Cable

with Jack

Connection

Figure 10: OE256-07 - Duct Mounted E-BUS CO2 Sensor Wiring

Revised 4/30/12

VCB-X Controller

4 3 2 1

1.2 37X04

<PC>

1.6

10 Foot EBC E-BUS Cable

(Provided)

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Space Temperature Sensor Wiring

Space Temperature Sensor

The OE210, OE211, OE212, OE213 Space Temperature Sensor is typically used for constant volume HVAC unit applications controlling one zone. The Space Temperature Sensor is a 10K Type III thermistor sensor and should be mounted approximately 5 feet above the ﬂ oor in the space that is to be controlled.

OE210, OE211, OE212, OE213

Space Temperature Sensor

The Space Temperature Sensor is available as a sensor only, sensor with override button, sensor with slide adjust, and sensor with slide adjust and override conﬁ gurations.

See Figur e 11 below for complete Space Temperature Sensor wiring

details.

VCB-X Controller

AI1

A R M E R C O O

OVR

L E R

TMP

GND

AUX

AI5

GND

Wire Required For Sensors With Slide Adjust Option Only

Figure 11: OE210, OE211, OE212, OE213 – Space Temperature Sensor Wiring and Slide Adjust

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Supply Air Temperature Sensor Wiring

Supply Air Temperature Sensor

The OE231 Supply Air Temperature Sensor must be wired as shown for proper operation. The Supply Air Temperature Sensor is a 10K Type III thermistor sensor. The Supply Air Temperature Sensor should be mounted in the unit discharge plenum or in the supply air

duct. See Figure 12 below for details.

Zone

OE231 Supply Air Temperature Sensor

Mount In HVAC

Unit Supply

Air Duct

VCB-X Controller

AI2

GND

Figure 12: OE231 – Supply Air Temperature Sensor Wiring

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Outdoor Air Temperature Sensor Wiring

Outdoor Air Temperature Sensor

The OE250 Outdoor Air Temperature Sensor must be wired as shown for proper operation of the VCB-X Controller. The Outdoor Air Temperature Sensor is a 10K Type III thermistor sensor. The sensor should be mounted in the upright position as shown in an area that is protected from the elements and direct sunlight. Be sure to make the wiring splices inside of the Outdoor Air Temperature Sensor

weather-tight enclosure. See Figure 13 below for details.

OE250 Outdoor Air

Temperature Sensor

Make Splice Connections

Inside Sensor Enclosure

As Shown. Seal All Conduit

Fittings With Silicone

Sealant

For applications involving Outdoor Air Humidity, the OE265-15-A E-BUS Outside Air & Humidity Sensor must be used instead. See

Figure 14 for details.

CAUTION: Be sure to mount the Outdoor Air Temperature

Sensor in an area that is not exposed to direct sunlight. The shaded area under the HVAC unit rain hood is normally a good location. Unused conduit opening(s) must have closure plugs installed and must be coated with sealing com pound to provide a rain-tight seal. Water can damage the sensor.

VCB-X Controller

Mount Sensor Outdoors

In Shaded Protected

Area & In Upright

Position As Shown

AI3

GND

Figure 13: OE250 – Outdoor Air Temperature Sensor Wiring

VCB-X Controller Field Technical Guide

Zone

INSTALLATION & WIRING

Zone

E-BUS Outdoor Air Temperature & Humidity Sensor Wiring

E-BUS Horizontal or Vertical Outdoor Air Temperature & Humidity Sensor

The OE265-15-A (Horizontal) or OE265-16-A (Vertical) E-BUS Outdoor Air Temperature & Humidity Sensor connects to the VCB-X Controller. A 10 foot EBC E-BUS cable (provided) plugs into the Sensor’s attached 3 foot cable and then plugs into the E-BUS port of the VCB-X Controller or other E-BUS Expansion Board. The sensor should be mounted in the upright position as shown in an area that is protected from the elements and direct sunlight. See

Figure 14 below for details.

VCB-X Controller

CAUTION: Be sure to mount the Outdoor Air Temperature

& Humidity Sensor in an area that is not exposed to direct sunlight. The shaded area under the HVAC unit rain hood is normally a good location. Unused conduit opening(s) must have closure plugs installed and must be coated with sealing compound to provide a rain-tight seal. Water can damage the sensor.

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub (HZ-EBC-248 or MS000248) or E-BUS Adapter Board (OE365-15-EBA) may be required.

AO2

AO3

= SC

TRIAC OUTPUT

TR1

= DIGITAL CO

OE265-15-A (Horizontal) or OE265-16-A (Vertical)

E-BUS Outside Air

Temperature

& Humidity Sensor

(OE265-15-A Shown)

EBC E-BUS Cable

with Jack

Connection

NOTE: Connect the

Sensor to the VCB-X Controller Using the Provided EBC E-BUS Cable.

4 3 2 1

1.2 37X04

<PC>

1.6

WattMaster Label #LB102093-01-A

Rev.: 1C

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

24 VAC

INPUT

E-BUS

EXPANSION

10 Foot EBC E-BUS

Cable (Provided)

E-BUS

EXPANSION

Figure 14: OE265-15-A & OE265-16-A – E-BUS Outdoor Air Temperature & Humidity Sensor Wiring

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

E-BUS Return Air Temperature & Humidity Sensor Wiring

E-BUS Return Air Temperature & Humidity Sensor

The OE265-17-A E-BUS Return Air Temperature & Humidity Sensor connects to the VCB-X Controller. A 50 foot EBC E-BUS cable (provided) plugs into the Sensor’s attached 3 foot cable and then plugs into the E-BUS port of the VCB-X Controller or other E-BUS Expansion Board. The sensor should be mounted in the upright position as shown in an area that is protected from the

elements and direct sunlight. See Figure 15 below for details.

VCB-X Controller

OE265-17-A

E-BUS Return Air

Temperature

& Humidity Sensor

NOTE: Connect the

Sensor to the VCB-X Controller Using the Provided EBC E-BUS Cable.

CAUTION: Be sure to mount the Return Air Temperature

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub (HZ-EBC-248 or MS000248) or E-BUS Adapter Board (OE365-15-EBA) may be required.

AO2

AO3

= SC

TRIAC OUTPUT

TR1

= DIGITAL CO

WattMaster Label #LB102093-01-A

Rev.: 1C

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

24 VAC

INPUT

E-BUS

EXPANSION

E-BUS

EXPANSION

4 3 2 1

1.2 37X04

<PC>

1.6

EBC E-BUS Cable

with Jack

Connection

Figure 15: OE265-17-A – E-BUS Return Air Temperature & Humidity Sensor Wiring

VCB-X Controller Field Technical Guide

50 Foot EBC E-BUS

Cable (Provided)

Revised 8/7/13

INSTALLATION & WIRING

Suction Pressure Transducer Wiring

Zone

Suction Pressure Transducer Kit

The OE275-03-A Suction Pressure Transducer Kit is comprised of the OE275-01 Suction Pressure Transducer, modular cable with a modular connector on one end and bare stripped wires on the other end, an E-BUS Adapter Board, and a 3 foot EBC E-BUS Cable. It is required for any VCB-X application with DX Cooling that requires Dehumidiﬁ cation.

The Suction Pressure Transducer is used to measure suction pressure at the HVAC unit’s DX evaporator coil suction line. This suction line pressure is converted to saturated refrigerant temperature by the VCB-X Controller. This temperature is used by the VCB-X Controller to accurately control the compressors to a suction temperature setpoint to provide optimum performance from the system during Dehumidiﬁ cation operation.

VCB-X Controller

The Suction Pressure Transducer wires to the VCB-X Controller as

shown in Figure 16 below. In this application, the Suction Pressure

Transducer connects to the E-BUS Adapter Board’s V, SIG, and GND terminals through a cable. The cable is supplied with a 3-pin Packard mating connector for attachment to the sensor on one end and has 3 color-coded stripped wires on the other end. The stripped wire ends can be spliced to other wires to extend the wiring length when required. The EBC E-BUS Cable connects to the E-BUS Adapter Board. This cable must then connect to the VCB-X Controller directly or to a VCB-X Expansion Board connected to the VCB-X Controller.

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub (HZ-EBC-248 or MS000248) or E-BUS Adapter Board (OE365-15-EBA) may be required.

AO2

AO3

= SC

TRIAC OUTPUT

TR1

= DIGITALCO

WattMaster Label #LB102093-01-A

Rev.: 1C

Suction Pressure Transducer

OE275-01

Caution:

1.) The Schraeder Port Used For Installation Of The Suction Pressure Transducer Should Be Located In A Vertical Portion Of The Suction Line To Prevent Refrigerant Oil From Accumulating In The Sensor.

PL102458-AT

E-BUS Adapter Board

EBC E-BUS Cable

(Included)

Connect to

VCB-X Controller or

Expansion Module

that is Connected to

the VCB-X Controller

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

24 VAC

INPUT

E-BUS

EXPANSION

E-BUS

EXPANSION

Figure 16: OE275-03-A – Suction Pressure Transducer Kit Wiring

Revised 1/23/13

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Digital Compressor Discharge Temperature Sensor Wiring

Digital Compressor Discharge Temperature Sensor

A Digital Compressor Discharge Temperature Sensor (by others)

must be wired as shown in Figure 17 below for proper operation of

the VCB-X Controller’s Digital Scroll Compressor.

The Discharge Temperature Input is a thermistor input. There is no polarity requirement for the thermistor.

Digital Compressor

Discharge Temperature Sensor

(By Others)

NOTE: For thermistor signal wiring, short wire runs are

recommended.

VCB-X Controller

AI4

GND

Figure 17: Digital Compressor Discharge Temperature Sensor Wiring

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Digital Compressor Unloader Wiring

Zone

Digital Compressor Unloader

The Digital Compressor Unloader uses a solenoid unloader as the capacity control method. The unloader solenoid is energized in an on/ off pattern to deliver the capacity needed by the digital compressor to achieve setpoint.

VCB-X Controller

The Unloader Solenoid output is a triac output. The maximum continuous solenoid load is 0.5A and the peak inrush current is 6A.

Only (1) Digital Compressor can be controlled with the VCB-X Controller.

See Figure 18 below for wiring details.

24 VAC

UNLOAD

Digital Compressor

GND

Line Voltage

DAMAGED

24 VAC

INPUT

GND

24VAC

Size Transformer For Correct Total Load. VCB-X Controller = 8 VA

E-BUS

EXPANSION

E-BUS

EXPANSION

GND

Figure 18: Digital Compressor Unloader Wiring

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Supply Fan VFD Wiring

Supply Fan VFD Signal

The Supply Fan VFD Signal is a user-adjustable signal with a range of 0-10 VDC from AOUT1 on the VCB-X Controller. This signal output can be connected to the Supply Fan Variable Frequency Drive to modulate the Supply Fan speed.

See Figure 19 below for detailed wiring.

VCB-X Controller

CAUTION: Variable Frequency Drive units can cause large

transient noise spikes which can cause interference to be propagated on other electronic equipment. Use shielded wire wherever possible and route all sensor and controller wiring away from the Variable Frequency Drive and the HVAC Unit electrical wiring.

Caution: The VFD Unit Must Be Configured For 0-10

VDC Input. The Input Resistance At The VFD Must Not Be Less Than 1000 Ohms When Measured At The VFD Terminals With All Input Wires Removed.

0-10VDC Input From AOUT1

AOUT1

GND

Line Voltage

THE NTROLLER WILL BE

DAMAGED

24 VAC

INPUT

GND

24VAC

Size Transformer For Correct Total Load. VCB-X Controller = 8 VA

E-BUS

EXPANSION

E-BUS

EXPANSION

GND

Shield

Supply Fan Variable Frequency Drive

(By Others)

Note: Wire To The VFD Using 18 GA

Minimum 2 Conducter Twisted Pair With Shield Cable. Wire Shield To GND As Shown.

Figure 19: Supply Fan VFD Wiring

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

3Y1

1 - COM

Economizer Actuator Wiring

Zone

Economizer Damper Actuator

The Economizer Damper Actuator signal voltage output (using AOUT2) is user-adjustable, but must be set to 2-10 VDC for this application. This signal output is used by the VCB-X Controller to modulate the Economizer Damper Actuator in order to control the amount of Outdoor Air delivered to the HVAC unit for Free

Cooling and/or Indoor Air Quality requirements. See Figur e 20 for

detailed wiring.

VCB-X Controller

WARNING: It is very important to be certain that all

wiring is correct as shown in the wiring diagram below. Failure to observe the correct polarity will result in damage to the actuator or VCB-X Controller.

AOUT2

Economizer Damper Actuator

(By Others - Belimo Actuator Shown)

Line Voltage

THE NTROLLER WILL BE

DAMAGED

24 VAC

INPUT

GND

24VAC

Size Transformer For Correct Total Load. VCB-X Controller = 8 VA

E-BUS

EXPANSION

E-BUS

EXPANSION

GND

24 VAC

Typical

2-10 VDC

Output

GND

Belimo Actuator Wiring

Shown. Consult Factory

For Other Manufacturer

Figure 20: Economizer Damper Actuator Wiring

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Modulating Heating Device Wiring

Modulating Heating Device

The Modulating Heating Device signal voltage output is a useradjustable signal with a range of 0-10 VDC from AOUT3 when programming the controller. The output signal can be conﬁ gured for either Direct Acting or Reverse Acting operation as required.

The Output signal is normally used to control a Modulating Hot Water Valve or Modulating Steam Valve or is used for SCR Control of an Electric Heating Coil.

VCB-X Controller

See Figure 21 below for detailed wiring of the Modulating Heating

Device.

WARNING: It is very important to be certain that all wiring is

correct as shown in the wiring diagram below. Failure to observe the correct polarity could result in damage to the Modulating Heating Device or the VCB-X Controller.

Modulating Heating/Steam Device

(SCR or Hot Water Valve)

Range of 0 To 10 VDC

Line Voltage

THE NTROLLER WILL BE

DAMAGED

24 VAC INPUT

GND

24VAC

Size Transformer For Correct Total Load. VCB-X Controller = 8 VA

E-BUS

EXPANSION

E-BUS

EXPANSION

AOUT3

GND

Note:

1.) If the Modulating Heating Device Needs a Relay Signal to Activate, This Can Be Configured When Setting Up the VCB-X Controller.

Figure 21: Modulating Heating Device Wiring

VCB-X Controller Field Technical Guide

Zone

INSTALLATION & WIRING

VCB-X EM1 Expansion Module Input Wiring

Zone

VCB-X EM1 Expansion Module Inputs

The VCB-X EM1 Expansion Module ( OE336-23-EM1-A) provides an additional 6 analog inputs, 4 analog outputs, 3 binary inputs, and

5 conﬁ gurable relay outputs. See Figures 22 & 23 for complete

wiring details.

WARNING!!

Observe Polarity! All boards must be wired with GND-to-GND and 24VAC-to-24VAC. Failure to observe polarity will result in damage to one or more of the boards. Expansion Modules must be wired in such a way that the expansion modules and the controller are always powered together. Loss of power to the expansion module will cause the controller to become inoperative until power is restored to the expansion module.

OE271

Static Pressure

Connect FRP Tubing To High Pressure Port (Bottom Tube) and Route To Static Pressure Pickup Probe Located In Unit Discharge. Leave Port Marked “Lo” Open ToAtmosphere

Transducer

Splice If Required

(See Detailed

Wiring Diagram)

The VCB-X EM1 Expansion Module can be used in conjunction with the VCB-X EM2 Expansion Module ( OE336-23-EM2-A) and the E-BUS 12-Relay Expansion Module (OE358-23E-12R-A). The expansion modules can be used individually or together to provide the required inputs and outputs for your speciﬁ c applications.

VCB-X EM1 Expansion Module

OE231 RETURN AIR TEMP.

SENSOR

LEAVING WATER TEMP. SENSOR

MOUNT IN LEAVING

WATER PIPE

OE258-01 BUILDING STATIC

PRESSURE SENSOR

HIGH

HEAD PRESSURE

TRANSDUCER 1

HEAD PRESSURE

TRANSDUCER 2

LOW

EXC

OUT

COM

PLASTIC TUBING

TO BUILDING

PRESSURE

SENSING

LOCATIONS

+5V

SIG 2 GND

+5V

GND

MOUNT IN HVAC UNIT RETURN AIR STREAM

To 24

VAC

REMOTE FORCED OCCUPIED-N.O. CONTACT

HOOD ON-N.O. CONTACT

PROOF OF WATER FLOW-N.O. CONTACT

GND

+5V

SIG1

GND

SIG2

GND

BIN1

BIN2

BIN3

Connect To

ControllerVCB-X

Connect To Expansion Module(s) (When Used)

Size Transformer For Correct Total Load. VCB-X E 1 Module = 5 VA

Figure 22: VCB-X EM1 Expansion Module Input Wiring Diagram

Revised 8/7/14

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

VCB-X EM1 Expansion Module Output Wiring

VCB-X EM1 Expansion Module Outputs

The VCB-X EM1 Expansion Module must be connected to 24

VAC as shown in the wiring diagram below. Please see Table 1 for

correct VA requirements to use when sizing the transformer(s) used for powering the expansion module.

VCB-X EM1 Expansion Module

Line Voltage

Size Transformer For Correct Total Load. VCB-X E 1 Module = 5 VAM

BUILDING PRESSURE

GND

24VAC

NOTE: RELAY CONTACTS R1-R5 MAY BE CONFIGURED FOR:

1.) HEATING STAGES

2.) COOLING STAGES

3.) DIGITAL COMPRESSOR

4.) CONDENSER

5.) REVERSING VALVE

6.) HEAT PUMP COMPRESSOR

7.) PREHEAT

2 1

WARNING!!

Observe Polarity! All boards must be wired with GND-to-GND and 24VAC-to24VAC. Failure to observe polarity will result in damage to one or more of the boards. Expansion Modules must be wired in such a way that the expansion modules and the controller are always powered together. Loss of power to the expansion module will cause the controller to become inoperative until power is restored to the expansion module.

8.) AUX HEAT

9.) LOW AMBIENT

10.) ALARM

11.) OVERRIDE

12.) OCCUPIED

13.) ECONOMIZER

14.) MOD HEAT ENABLE

NOTE: ALL RELAY OUTPUTSARE NORMALLY OPEN AND RATED FOR 24 VAC POWER ONLY - 1AMP MAXIMUM LOAD

AOUT1

AOUT2

AOUT3

AOUT4

GND

Also, please note that when wiring the VCB-X EM1 Expansion Module, its contacts must be wired as wet contacts (connected to 24 VAC).

15.) EMERGENCY HEAT

16.) MOD COOL ENABLE

17.) MORNING WARM-UP / COOL-DOWN

18.) REHEAT

19.) EXHAUST FAN

20.) HEAT WHEEL

NOTE: BUILDING PRESSURE DAMPER

ACTUATOR OR BUILDING PRESSURE FAN

24 VAC ONLY

CONFIGURABLE RELAY OUTPUT #1

CONFIGURABLE RELAY OUTPUT #2

CONFIGURABLE RELAY OUTPUT #3

CONFIGURABLE RELAY OUTPUT #4

CONFIGURABLE RELAY OUTPUT #5

24 VAC POWER

CONDENSER FAN ECM

MOTOR

HVAC UNIT CONNECTIONS

VFD CONTROL CAN BE USED, NOT BOTH

BUILDING PRESSURE DAMPER

ACTUATOR

COM1

Y13

BUILDING PRESSURE

RELIEF FAN VFD

COM

CHILLED WATER VALVE ACTUATOR

COM1

Y13

CONDENSER 2 FAN VFD

COM

CONDENSER 2

WATER VALVE ACTUATOR

COM1

Y13

CONDENSER 1 FAN VFD

COM

Figure 23: VCB-X EM1 Expansion Module Output Wiring Diagram

VCB-X Controller Field Technical Guide

CONDENSER 1

WATER VALVE ACTUATOR

COM1

Y13

Revised 8/6/14

INSTALLATION & WIRING

Static Pressure Transducer Wiring

Zone

Static Pressure Transducer

The OE271 Static Pressure Transducer plugs directly into the VCB-X EM1 Expansion Module’s Static Pressure port. The Duct Static Pressure Sensor reading is used to determine current Duct Static Pressure. This Static Pressure reading is used to control the output signal supplied to the Supply Fan VFD or Zoning Bypass Damper Actuator. If you have conﬁ gured the HV AC unit for Constant Volume operation, this Sensor is optional. If it is installed on a Constant Volume unit, it will not affect operation, but rather will be used as a status-only reading. See Figure 24 below for detailed wiring.

OE271

Static Pressure

Transducer

Splice If Required

(Not Recommended.

See Note)

CAUTION: It is strongly recommended that you use pneumatic

tubing instead of relocating the sensor. Extending the wires could cause voltage drop problems.

VCB-X EM1 Expansion Module

Connect FRP Tubing To High Pressure Port (Bottom Tube) and Route To Static Pressure Pickup Probe Located In Unit Discharge. Leave Port Marked “Lo” Open To Atmosphere.

CAUTION: It Is Strongly Recommended That You Use Pneumatic Tubing Instead Of Relocating The Sensor. Extending The Wires Could Cause Voltage Drop Problems.

Size Transformer For Correct Total Load. VCB-X E 1 = 5 VAM

GND

Line Voltage

24VAC

Figure 24: OE271 Static Pressure Transducer Wiring Diagram

Revised 7/30/13

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Return Air Temperature Sensor Wiring

Return Air Temperature Sensor

The OE231 Return Air Temperature Sensor must be wired as shown

in Figure 25 below. The Return Air Temperature Sensor is a 10K

Type III thermistor sensor. The Return Air Temperature Sensor should be mounted in the return air duct. If the system has a Zoning Bypass Damper installed, be sure the return air sensor is located upstream of the bypass duct connection.

VCB-X EM1 Expansion Module

Return Air Temperature Sensor

Mount In HVAC

Unit Return

Air Duct

GND

Connect To

ControllerVCB-X

Connect To Expansion Module(s) (When Used)

Size Transformer For Correct Total Load. VCB-X E 1 Module = 5 VA

Figure 25: OE231 Return Air Temperature Sensor Wiring Diagram

VCB-X Controller Field Technical Guide

Revised 7/30/13

Zone

INSTALLATION & WIRING

Leaving Water Temperature Sensor Wiring

Zone

Leaving Water Temperature Sensor

The OE230 (with OE291 Immersion Well) or strap-on OE233 Leaving Water Temperature Sensor must be wired as shown in

Figure 26 below. The Leaving Water Temperature Sensor is a 10K

Type III thermistor sensor.

The Leaving Water Temperature Sensor should be mounted in the

leaving water piping. See Figure 27 for installation instructions.

VCB-X EM1 Expansion Module

O 230 LEAVING WATERE TEMPERATURE SENSOR WITH 91 IMMERSION

OE2 WELL - MOUNT IN LEAVING WATER PIPE

To T 2

To GND

STRAP-ON O 233 LEAVINGE WATER TEMPERATURE SENSOR

- MOUNT IN LEAVING WATER PIPE

GND

Connect To

ControllerVCB-X

Connect To Expansion Module(s) (When Used)

Size Transformer For Correct Total Load. VCB-X E 1 Module = 5 VA

Figure 26: OE230 and OE233 Leaving Water Temperature Sensor Wiring Diagram

Revised 7/30/13

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Strap-On Leaving Water Temperature Sensor Wiring

Butt Splice Or Wire Nut Wire Leads And Extend Wire To Controller Terminals. Connect One Wire Lead To Leaving Water Temperature Terminal (T2) At The Controller. Secure Other Wire Lead To Ground Terminal At The Controller. See Note 3. And Detailed Wiring Diagram Below.

Secure Sensor Element And Thermal Mastic Strip To Pipe With Supplied Wire Tie. Be Sure To Tighten Wire Tie Snugly To Ensure Good Thermal Contact.

Sensing Element (Supplied)

O 233 Leaving Water

Temperature Sensor

Wire Tire (Supplied)

Notes:

1.)Sensor Should Be Mounted At Location Along Pipe Length That Best Represents Desired Temperature Reading.

2.)Sensing Element Shown Mounted To Top Of Pipe. The Sensor Element May Be Located At Any Location Around Pipe.

3.)All Wiring To Be In Accordance With Local And National Electrical Codes And Specifications.

Leaving Water Pipe See Note 1 & 2.

Caution: For Accurate Temperature Readings It Is Necessary To Place Insulation Over The Sensor After Installation. This Prevents The Ambient Temperature From Affecting The Sensor. Insulation Should Cover The Sensor And Extend 6” to 12” Beyond Each End Of The Sensor.

Figure 27: OE233 Strap-On Leaving Water Temperature Sensor Installation

VCB-X Controller Field Technical Guide

Place Between Pipe And Sensing Element. Pipe Should Be Clean And Smooth To Provide Proper Thermal Contact With Sensing Element.

Thermal Mastic Strip (Supplied)

Thermal Mastic

Revised 9/18/13

INSTALLATION & WIRING

Building Static Pressure Sensor Wiring

Building Static Pressure Sensor

The OE258-01 Building Static Pressure Sensor must be wired as

shown in Figure 28 below. There are 3 terminal connections on

the Building Static Pressure Sensor. Connect the power side of the 24 VAC power source to the terminal labeled “+ EXC.” Connect the GND side of the 24 VAC power source to the terminal labeled “- COM.” Connect the remaining terminal labeled “OUT” to SIG1 on the VCB-X EM1 terminal block.

WARNING: It is very important to be certain that all wiring is

correct as shown in the wiring diagram below. Failure to observe the correct polarity will result in damage to the HVAC Unit Controller, Building Static Pressure Sensor, and the VCB-X Expansion Module.

Zone

VCB-X EM1 Expansion Module

OE258-01 Building Static

Tubing To Building Pressure Sensing Location

Tubing To Atmospheric Pressure Sensing Location

Pressure Sensor

HIGH

LOW

EXC

OUT

COM

To 24

VAC

SIG1

GND

Connect To

ControllerVCB-X

Connect To Expansion Module(s) (When Used)

Size Transformer For Correct Total Load. VCB-X E 1 Module = 5 VA

Figure 28: OE258-01 Building Static Pressure Sensor Wiring Diagram

Revised 7/30/13

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

Head Pressure Transducers

The Head Pressure Transducer(s) (by others) must be wired as shown

in Figure 29 below.

Head Pressure Transducers Wiring

VCB-X EM1 Expansion Module

HEAD PRESSURE 1

TRANSDUCER

(BY OTHERS)

HEAD PRESSURE 2

TRANSDUCER

(BY OTHERS)

RD WH

+5V SIG2 GND

+5V T3

GND

+5V

SIG2

GND

Connect To

ControllerVCB-X

Connect To Expansion Module(s) (When Used)

Size Transformer For Correct Total Load. VCB-X E 1

Module = 5 VA

Figure 29: Head Pressure Transducers Wiring Diagram

VCB-X Controller Field Technical Guide

Revised 7/16/14

Zone

3Y1

1 - COM

INSTALLATION & WIRING

Building Pressure Control Output Wiring

Zone

Building Pressure Control Output

The Building Pressure Control Output is a 0-10 VDC or 2-10 VDC signal sent from the VCB-X EM1 Expansion Module. When using the output for Direct Building Pressure Control (output signal rises on a rise in building pressure), the output signal can be connected to either a Variable Frequency Drive controlling an exhaust fan or to a damper actuator controlling an exhaust damper (both by others). When used in this manner, the output signal must be conﬁ gured for

Direct Acting operation. See Figure 30 below for detailed wiring

of the Building Pressure Control Output Signal.

When using this output for Reverse Building Pressure Control (output signal rises on a fall in building pressure), a damper actuator controlling an OA Damper or Supply Fan VFD would be used. When

VCB-X EM1 Expansion Module

24 VAC

using the OA damper for Reverse Building Pressure Control, the output signal must be conﬁ gured for Reverse Acting operation. A Building Pressure Sensor connected to SIG1 on the VCB-X EM1 Expansion Module is used to sense and control the signal to the Building Pressure Output. The OE258-01 Building Static Pressure Sensor must be connected in order for the Building Pressure Output to operate correctly.

CAUTION: Variable Frequency Drive units can cause

large transient noise spikes that can cause interference to be propagated on other electronic equipment. Use shielded wire wherever possible and route all sensor and controller wiring away from the Variable Frequency Drive and the HVAC unit electrical wiring.

Wiring When Using Damper Actuator

For Building Pressure Control

Building Pressure Control

Damper Actuator

(By Others - Belimo Actuator Shown)

GND

Belimo Actuator Wiring

Shown. Consult

Factory For Other

Manufacturer Wiring

Instructions

Line Voltage

Size Transformer For Correct Total Load. VCB-X E 1 Module = 5 VAM

BUILDING PRESSURE

GND

24VAC

2 1

AOUT1

GND

Note:

Wire To The VFD Using 18 GA Minimum 2 Conductor Twisted Pair With Shield Cable. Wire Shield To GND As Shown

Shield

GND

Building Pressure Control

Exhaust Fan Variable Frequency Drive

0-10 VDC Input From AO1

Caution: The VFD Unit Must Be Configured For 0-10VDC Input. The Input Resistance At The VFD Must Not Be Less Than 1000 Ohms When Measured At The VFD Terminals With All Input Wires Removed.

Wiring When Using Exhaust Fan VFD

For Building Pressure Control

(By Others)

Shield

GND

Both Types Of

Building

Pressure Control

Devices Are

Shown

Only One Type

Of Building

Pressure Control

Device May Be Used On Each

HVAC Unit

Figure 30: Building Pressure Control Output Wiring Diagram

Revised 7/30/13

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

3Y1

1 - COM

Chilled Water Valve Actuator Wiring

Modulating Cooling Output

This output is used to control a Modulating Chilled Water Valve to maintain the Cooling Supply Air Temperature Setpoint. The output is conﬁ gured for either 0-10 VDC or 2-10 VDC operation and can be

conﬁ gured for direct acting or reverse acting operation. See Figure 31 for wiring details.

VCB-X EM1 Expansion Module

Line Voltage

Size Transformer For Correct Total Load. VCB-X E 1 Module = 5 VAM

BUILDING PRESSURE

GND

24VAC

2 1

AOUT2

Chilled Water Valve Actuator

(By Others)

GND

Figure 31: Chilled Water Valve Actuator Wiring Diagram

VCB-X Controller Field Technical Guide

Revised 7/30/13

Zone

3Y1

1 - COM

3Y1

1 - COM

INSTALLATION & WIRING

Zone

Condenser Fan ECM Motor and VFD or Water Valve Actuator Wiring

Head Pressure Control Output

The VCB-X EM1 Expansion Module can monitor up to (2) Head Pressure Transducers and control up to (2) Condenser Fans or Condenser Water Valves to maintain a Head Pressure Setpoint. The VCB-X Controller can be conﬁ gured for an Air Cooled Condenser

(default) or for a Water Cooled Condenser. See Figure 32 for wiring

VCB-X EM1 Expansion Module

On an Air Cooled Unit, the Condenser Fan will be controlled with 0-10 VDC output signal or a PWM output signal. Both outputs operate simultaneously. On a Water Cooled Unit, the Condenser Water Valve will be controlled with a 2-10 VDC output signal.

Condenser 2 Fan VFD

COM

Condenser 2 Water Valve Actuator

1 - COM

Line Voltage

Size Transformer For Correct Total Load. VCB-X E 1 Module = 5 VAM

BUILDING PRESSURE

GND

24VAC

Condenser 1 Fan VFD

COM

2 1

AOUT3

AOUT4

GND

PWM-

PWM+

Condenser 1 Water Valve Actuator

Condenser Fan ECM Motor

Figure 32: Condenser Fan ECM Motor and (2) Condenser Fans VFD or (2) Condenser Water Valves Actuator Wiring Diagram

Revised 7/16/14

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

VCB-X EM2 Expansion Module

The VCB-X EM2 Expansion Module ( OE336-23-EM2-A) provides 1 additional analog input, 2 analog outputs, and 3 binary inputs. See

Figures 34 & 35 for complete wiring details.

The VCB-X EM2 Expansion can be used in conjunction with the VCB-X EM1 Expansion Module ( OE336-23-EM1-A) and the E-BUS 12-Relay Expansion Module (OE358-23E-12R-A). The expansion modules can be used individually or together to provide the required inputs and outputs for your speciﬁ c applications.

VCB-X EM2

Expansion Module

www.aaon.com

OE336-23-EM2

VCB-X EM2 EXPANSION MODULE

AAON: V35130

ANALOG INPUT TB

ECONO FEEDBACK / RST SIG

GND

BINARY INPUT TB

REMOTE FORCED COOLING REMOTE FORCED HEATING REMOTE FORCED DEHUMID.

RETURN AIR BYPASS DAMPER

RETURN AIR DAMPER

The VCB-X EM2 Expansion Module must be connected to 24

VAC as shown in the wiring diagram below. Please see Table 1 for

correct VA requirements to use when sizing the transformer(s) used for powering the expansion module.

Also please note that when wiring the VCB-X EM2 Expansion Module, its contacts must be wired as wet contacts (connected to 24 VAC).

www.orioncontrols.com

ANALOG OUTPUT TB

GND

24VAC

WARNING!!

Observe Polarity! All boards must be wired with GND-to-GND and 24VAC-to-24VAC. Failure to observe polarity will result in damage

Line Voltage

to one or more of the boards. Expansion Modules must be wired in such a way that the expansion modules and the controller are always powered together. Loss of power to the expansion module

Size Transformer For

will cause the controller to become inoperative until power is restored to the expansion module.

Correct Total Load. VCB-X E Module =

5 VA

Figure 33: VCB-X EM2 Expansion Module

24 VAC POWER ONLY

WARNING! POLARITY MUST BE

OBSERVED OR THE CONTROLLER

WILL BE DAMAGED

POWER INPUT TERMINAL BLOCK

+24 VAC

WattMaster Label

#L102189

Rev.: 1C

E-BUS

CONNECT

E-BUS

CONNECT

GNDGND

VCB-X Controller Field Technical Guide

New 7/17/14

INSTALLATION & WIRING

VCB-X EM2 Input Wiring

Zone

AIN1 Analog Input #1 can be used for one of the following options:

Title 24 Economizer Feedback

If the controller has been conﬁ gured for Title 24 Economizer

operation, the Economizer Actuator Feedback signal will be wired to this input.

Remote SAT Reset Signal

If Title 24 Economizer operation has not been conﬁ gured, a Remote

Supply Air Temperature Reset Signal can be connected to AIN1 for applications requiring Remote Reset of the Supply Air Temperature Setpoint.

NOTE:

Either The Slide Offset Option For The Space Temperature Sensor May Be Used Or The Remote Supply Air Temperature Reset Signal Option (By Others) May Be Connected To AIN1 On The VCB-X E 2 Expansion Module. Only One Option Is Allowed, Not Both.

Title 24 Economizer Feedback

Signal Or Remote Supply Air

Temperature Reset Signal

(Configurable 0-10VDC)

(By Others)

REMOTE FORCED COOL - N.O. CONTACT

REMOTE FORCED HEAT - N.O. CONTACT

REMOTE FORCED DEHUM.- N.O. CONTACT

AIN1

GND

BIN1

BIN2 BIN3

When the Slide Offset option on the Room Sensor is used, the Remote Supply Air Temperature Reset Signal cannot be used. Only one of these options may be used for VCB-X Controller applications.

This input on the VCB-X EM2 Expansion Module can accept a conﬁ gurable voltage signal from 0-10 VDC (Direct or Reverse

Acting). See Figure 34 below for complete wiring details.

BIN1-BIN3 - Remote Forced Cooling, Heating, and Dehumidiﬁ cation

The VCB-X Controller can be configured to accept 24 VAC wet contact closures to force the unit into Cooling, Heating, and Dehumidiﬁ cation. If the Forced Contact conﬁ guration option is

selection, it applies to all three modes. See Figure 34 below for

wiring details.

VCB-X EM2

Expansion Module

www.aaon.com

VCB-X EM2 EXPANSION MODULE

AAON: V35130

ANALOG INPUT TB

GND

BINARY INPUT TB

REMOTE FORCED COOLING REMOTE FORCED HEATING REMOTE FORCED DEHUMID.

RETURN AIR BYPASS DAMPER

RETURN AIR DAMPER

www.orioncontrols.com

OE336-23-EM2

ECONO FEEDBACK / RST SIG

ANALOG OUTPUT TB

GND

24VAC

Size Transformer For Correct Total Load. VCB-X E Module = 5 VAM2

Line Voltage

Figure 34: VCB-X EM2 Inputs Wiring

New 7/17/14

GND

24 VAC POWER ONLY

WARNING! POLARITYMUST BE

OBSERVED OR THE CONTROLLER

WILL BE DAMAGED

POWER INPUT TERMINAL BLOCK

+24 VAC

WattMaster Label

#L102189

GNDGND

E-BUS

CONNECT

Rev.: 1C

E-BUS

CONNECT

WARNING!!

Observe Polarity! All boards must be wired with GND-toGND and 24VAC-to-24VAC. Failure to observe polarity will result in damage to one or more of the boards. Expansion Modules must be wired in such a way that the expansion modules and the controller are always powered together. Loss of power to the expansion module will cause the controller to become inoperative until power is restored to the expansion module.

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

VCB-X EM2 Output Wiring

Return Air Bypass

The VCB-X Controller can be conﬁ gured for AAON® PAC or DPAC applications. Both AAON provide improved moisture removal capabilities while utilizing internal space loads for reheat by redirecting Return Air around the Evaporator Coil instead of through the coil. See the AAON®

PAC and DPAC applications section of this manual on page 6 for

complete operation details.

The AAON

PAC and DPAC control applications utilize a Return Air Bypass Damper Actuator and a Return Air Damper Actuator to modulate the Return Air and Return Air Bypass Dampers to control the amount of air that is redirected around the Evaporator Coil.

PAC and DPAC control schemes

VCB-X EM2

Expansion Module

www.aaon.com

VCB-X EM2 EXPANSION MODULE

AAON: V35130

ANALOG INPUT TB

ECONO FEEDBACK / RST SIG GND

BINARY INPUT TB

REMOTE FORCED COOLING REMOTE FORCED HEATING REMOTE FORCED DEHUMID.

RETURN AIR BYPASS DAMPER

RETURN AIR DAMPER

24 VAC POWER ONLY

WARNING! POLARITY MUST BE

OBSERVED OR THE CONTROLLER

POWER INPUT TERMINAL BLOCK

E-BUS

CONNECT

www.orioncontrols.com

OE336-23-EM2

ANALOG OUTPUT TB

WILL BE DAMAGED

+24 VAC

WattMaster Label

GNDGND

GND

#L102189

Rev.: 1C

E-BUS

CONNECT

The AAON® DPAC control scheme provides improved moisture removal capabilities and tighter temperature control than the AAON

PAC controls scheme by combining Copeland Digital Scroll™ Compressor control in addition to Return Air Bypass control. See the Return Air Bypass Sequence for more details.

See Figure 35 below for detailed wiring of the Return Air Bypass

and Return Air Damper Actuators.

WARNING: It is very important to be certain that all wiring

is correct as shown in the wiring diagram below. Failure to observe the correct polarity could result in damage to the Damper Actuator or the VCB-X Expansion Module.

Belimo Actuator Wiring Shown. Consult Factory For Other Manufacturer Wiring Instructions.

RETURN AIR

DAMPER ACTUATOR

COM1

AOUT1 AOUT2 GND

Y13

RETURN AIR BYPASS

DAMPER ACTUATOR

COM1

Y13

GND

24VAC

Size Transformer For Correct Total Load. VCB-X E Module = 5 VAM2

Line Voltage

Figure 35: Return Air Bypass Wiring

VCB-X Controller Field Technical Guide

WARNING!!

New 7/17/14

Zone

INSTALLATION & WIRING

12-Relay E-BUS Expansion Module Wiring

Zone

E-BUS 12-Relay Expansion Module

The E-BUS 12-Relay Expansion Module can be used in conjunction with the VCB-X EM1 Expansion Module ( OE336-23-EM1-A) and

The E-BUS 12-Relay Expansion Module ( OE358-23E-12R-A)

provides for 12 Dry Contact Conﬁ gurable Relay Outputs. See Figure 36 below for complete wiring details.

the VCB-X EM2 Expansion Module ( OE336-23-EM2-A). The expansion modules can be used individually or together to provide the required inputs and outputs for your speciﬁ c applications.

The expansion modules can be used individually or together to provide the required inputs and outputs for your speciﬁ c applications.

WARNING!!

Note:

A Total Of 17 Relays Are Available By Adding The Relay Expansion Modules. All Expansion Module Relay Outputs Are User Configurable.

Note:

All Relay Outputs Are Normally Open And Rated For 24 VAC Power Only. 1 Amp Maximum Load.

E-BUS 12-Relay

Expansion Module

NOTE: RELAY CONTACTS R1-R12 MAY BE CONFIGURED FOR:

1.) HEATING STAGES

2.) COOLING STAGES

3.) DIGITAL COMPRESSOR

4.) CONDENSER

5.) REVERSING VALVE

6.) HEAT PUMP COMPRESSOR

7.) PREHEAT

8.) AUX HEAT

9.) LOW AMBIENT

10.) ALARM

11.) OVERRIDE

12.) OCCUPIED

13.) ECONOMIZER

14.) MOD HEAT ENABLE

15.) EMERGENCY HEAT

16.) MOD COOL ENABLE

17.) MORNING WARM-UP / COOL-DOWN

18.) REHEAT

19.) EXHAUST FAN

20.) HEAT WHEEL

Configurable Relay Output #1

Configurable Relay Output #2

Configurable Relay Output #3

Configurable Relay Output #4

Configurable Relay Output #5

Configurable Relay Output #6

Configurable Relay Output #7

Configurable Relay Output #8

COM

RLY1 RLY2

RLY3

RLY4

COM

RLY5 RLY6 RLY7 RLY8

EBC E-BUS Cable

Connect To VCB-X Controller

EBC E-BUS Cable

Connect To Next Expansion Board

(When Used)

RLY-COM

RLY1

RLY2

RLY3

RLY4

RLY-COM

RLY5

RLY6

RLY7

RLY8

RELAY

EXPANSION BOARD

YS102324 REV 2

MADE IN USA

RLY-COM

RLY9

RLY10

RLY11

RLY12

GND

24VAC

COM RLY9 RLY10 RLY11 RLY12

GND

24 VAC

Configurable Relay Output #9 Configurable Relay Output #10

Configurable Relay Output #11 Configurable Relay Output #12

15 VA Minimum

Power Required

GND

24 VAC

Figure 36: OE358-23E-12R-A – E-BUS 12-Relay Expansion Module Wiring

Revised 4/11/14

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

EBTRON®, GreenTrolTM, and Paragon Wiring

EBTRON®, GreenTrolTM, and Paragon Air Flow Measurement Digital Transmitters

NOTE: Only the EBTRON

GA-200-N Module (with GF series Airﬂ ow Station), or Paragon MicroTransEQ series of MODBUS transmitters are compatible with the VCB-X Controller. No other series of transmitters will work for this application. Contact WattMaster Controls for information on other airﬂ ow station options.

The OE365-15-EBA E-BUS Adapter Board attaches to the VCB-X Controller with an EBC E-BUS cable. The Adapter Board is used for connecting the EBTRON Measurement Digital Transmitter to the VCB-X Control System. You must wire the Airﬂ ow Measurement Digital Transmitter to the

Adapter Board as shown in Figure 37.

AO2

AO3

= SC

TRIAC OUTPUT

TR1

= DIGITALCO

GTC116 series, GreenTrolTM

, GreenTrolTM, or Paragon Airﬂ ow

VCB-X Controller

NOTE: Up to 4 EBTRON

, GreenTrolTM, or Paragon

Airﬂ ow Measurement Digital Transmitters can be attached to each Adapter Board.

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub (HZ-EBC-248 or MS000248) may be required.

*NOTE: When conﬁ guring the GTC116 Series, be sure to set

the Parity to “NO PARITY, 1 STOP BIT.”

Airflow Measurement

Digital Transmitter Terminals

NET+ NETCOMM

For Exhaust Air CFM

(Set Address Switch To 12)

WattMaster Label #LB102093-01-A

Rev.: 1C

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

24 VAC

INPUT

GND

Line Voltage

Size Transformer For Correct Total Load. VCB-X Controller = 8 VA

WARNING!!

Observe Polarity! All boards must be wired with GND-to-GND and 24 VAC-to-24 VAC. Failure To observe polarity could result in damage to the boards.

24VAC

EXPANSION

E-BUS Cable

(EBC Cable)

E-BUS

EXPANSION

OE365-15-EBA

E-BUS Adapter Board

NET+ NETCOMM

Airflow Measurement

Digital Transmitter Terminals

For Supply Air CFM

(Set Address Switch To 11)

Airflow Measurement

Digital Transmitter Terminals

For Return Air CFM

(Set Address Switch To 10)

Airflow Measurement

Digital Transmitter Terminals

For Outdoor Air CFM

(Set Address Switch To 9)

Figure 37: EBTRON® GTC116 Series, GreenTrolTM GA-200-N Series, and Paragon MicroTransEQ Series Air Flow Measurement Digital Transmitter Wiring

VCB-X Controller Field Technical Guide

Revised 9/11/13

INSTALLATION & WIRING

MHGRV-X Controller Wiring

Zone

MHGRV-X Controller Wiring

The OE377-26-00059 MHGRV-X Controller (AAON part number V12100) is designed to control a Modulating Hot Gas Reheat Valve to maintain a desired Supply Air Temperature and Dehumidiﬁ cation setpoint. The MHGRV-X Controller directly connects to the VCBX Controller or indirectly using an E-BUS Expansion Board via an

EBC E-BUS cable. See Figure 38.

The following information will be passed between the MHGRV-X controller and the VCB-X Controller:

 Reheat Enable command  Supply Air Temperature Setpoint  The Reset Supply Air Temperature Setpoint

MHGRV-X CONTROLLER

(OE377-26-00059)

Mount In Supply

Air Duct

Supply

Air Temperature

Sensor

 The Supply Air Temperature Reset Signal  If the communication is interrupted between the

MHGRV-X Controller and the VCB-X Controller, the MHGRV-X controller will revert to stand-alone operation.

For more information, refer to the MHGRV -X Controller Technical

Guide.

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub or Adapter Board may be required.

Fan

Compressor

HGR Solenoid Valve

2 Position HGR Valve (Optional)

COMM

Supply Air Temperature

Sensor Connects to AI2 & GND

On VCB-X Controller

Set Jumper To

NORMAL.

EBC E-BUS Cable

Connects To The

VCB-X Controller’s

Expansion

E-BUS Expansion Board

Port Directly

or Indirectly Using an

Figure 38: MHGRV-X Controller to VCB-X Controller Wiring

GND

24VAC

Line

40 VA

Transformer

Minimum

Condenser Valve #1

BLK WHT RED GRN

BLK WHT GRN

RED

HGR Valve #1

Revised 8/29/13

VCB-X Controller Field Technical Guide

INSTALLATION & WIRING

MODGAS-X Controller Wiring

The OE377-26-00058 MODGAS-X Controller (AAON Part No. V12090) is designed to modulate up to (2) gas valves to maintain a desired Discharge Air Temperature. It also controls the speed of the induced draft fan to maintain proper combustion in the heat exchanger. The MODGAS-X Controller directly connects to the VCB-

X Controller or indirectly using an E-BUS Expansion Board via an

EBC E-BUS cable. See Figure 39.

The following information will be passed between the MODGAS-X controller and the VCB-X Controller:

 Heat activation command  Heating Discharge Setpoint

MODGAS-X CONTROLLER

(OE377-26-00058)

Connect

Supply Air Temperature

to AI2 & GND

Sensor On VCB-X Controller

Mount In Supply

Air Duct

Supply

Air Temperature

Sensor

 The offset for the Supply Air Temperature Sensor  High Limit Temperature Setpoint  If the communication is interrupted between the

MODGAS-X Controller and the VCB-X Controller, the MODGAS-X controller will revert to stand-alone operation.

For more information, refer to the MODGAS-X Controller T echnical

Guide.

NOTE: If using multiple E-BUS Sensors or Modules, the

E-BUS Hub or Adapter Board may be required.

Fan Enable

Low Speed Fan

Aux Heat Valve

Set Jumper To 1.

Figure 39: MODGAS-X Controller to VCB-X Controller Wiring Diagram

EBC E-BUS Cable

Connects To

VCB-X Controller’s

Expansion

Port

24 VAC Power Input Terminals Max. Power Consumption 1 Gas Valve = 18 VA 2 Gas Valves = 33 VA

VCB-X Controller Field Technical Guide

Revised 8/29/13

START-UP & COMMISSIONING

Addressing, Baud Rate & Powering Up

Before Applying Power

In order to have a trouble free start-up, it is important to follow a few simple procedures. Before applying power for the ﬁ rst time, it is very important to correctly address the controller and run through a few simple checks.

Controller Addressing and Baud Rate

All VCB-X Controllers are equipped with address switches. If the VCB-X Controller is to operate as a stand-alone system (not connected to any other HVAC unit or VAV/Zone Controllers), the controller address switch should be set for address 1. When using the Modular Service Tool or System Manager to program and conﬁ gure the VCB-X Controller, you would enter this address to communicate with the controller. When the system is to be connected to other HVAC unit controllers on a communication loop, each controller’s address switch must be set with a unique address between 1 and 59.

Address switches 7 and 8 are used for the baud rate selection.

See Figure 40 below for address switch and baud rate setting

information.

VCB-X Controller

MADE IN USA

ENTER

FAN

TB7

BACNET

3650

R68

T-

R+

ALARM

CANCEL

RS-485 COMM LOOP. WIRE

“R”TO “R”, “T”TO “T” “SHLD”TO “SHLD”

ANALOG INPUTS

AI1 = SPC (SPACETEMP SENSOR) AI2 AI3 AI4 AI5

BINARYINPUTS

BI1 BI2 BI3 BI4

ANALO

AO1 AO2 AO3

TRIAC OUTPUT

TR1

UNLOADER (24 VAC & UNLOAD TERMINALS)

www.aaon.com

VCB-X CONTROLLER

Orion No.: OE335-26B-VCBX

= SAT(SUPPLY AIR TEMP SENSOR) = OAT(OUTDOOR AIR TEMP SENSOR) = DCT(DIGITAL COMP DISCH TEMP SENSOR) = SPACETEMPERATURE SLIDE OFFSET

= EMERGENCYSHUTDOWN = PROOF OF FLOW = DIRTYFILTER = COILTEMP SWITCH

G OUTPUTS

= FAN VFD = ECONOMIZER = MOD HEATING

= DIGITALCOMP

WattMaster Label

#SW000061

Rev.: 1A

24 VAC POWER

ONLY

WARNING!

POLARITYMUST

BE OBSERVED

OR THE

CONTROLLER

WILLBE

DAMAGED

GND

E-BUS

EXPANSION

+24VAC

DOWN

www.orioncontrols.com

AAON : V28940

AAON Coil: J00142

RELAYCONTACT RATING IS 1AMP MAX @ 24 VAC

RELAY2

RELAY3

RELAY4

RELAY5

RELAY6

RELAY COMMON

E-BUS

EXPANSION

Power Wiring

One of the most important checks to make before powering up the system for the ﬁ rst time is to conﬁ rm proper voltage and transformer sizing for each controller. Each VCB-X Controller requires 8 VA of power delivered to it at 24 VAC. You may use separate transformers for each device (preferred) or power several devices from a common transformer. If several devices are to be powered from a single transformer, correct polarity must be followed.

WARNING: Observe Polarity! All boards must be wired with

GND-to-GND and 24 VAC-to-24 VAC. Failure to observe polarity will result in damage to one or more of the boards.

Check all wiring leads at the terminal block for tightness. Be sure that wire strands do not stick out and touch adjacent terminals. Conﬁ rm that all sensors required for your system are mounted in the appropriate location and wired into the correct terminals on the VCB-X Controller.

After all the above wiring checks are complete, apply power to the VCB-X Controller.

Note:

The Power To The Controller Must Be Removed And Reconnected After Changing The Address Switch Settings In Order For Any Changes To Take Effect.

BAUD RATE SELECTION

Switch 7 Switch 8

Baud

9600

57600

OFF

Address 1 @ 9600 Baud

ADD

1 2 4 8

32 Baud 0 Baud 1

ADD

Caution:

Disconnect All Communication Loop Wiring From The Controller Before Removing Power From The Controller. Reconnect Power And Then Reconnect Communication Loop Wiring.

Communication Setting

OFF

CommLink IV

CommLink 5

Address 5 @ 57,600 Baud

ADD

1 2 4 8

32 Baud 0 Baud 1

ADD

Figure 40: VCB-X Controller Address Switch and Baud Rate Setting

54 VCB-X Controller Field Technical Guide

Revised 10/30/12

Address Switch Shown Is

Set For Address 1

The Address For Each Controller

Must Be Unique To The Other Controllers

On The Local Loop And Be Between 1 and 59

Controller

Address Switch

Address Switch Shown Is

Set For Address 13

START-UP & COMMISSIONING

Mode

Selection

ENTER

CLEAR

ESC

DOWN

DEC

708

MINUS

STATUS

SETPOINTS

SCHEDULES

CONFIGURATION

ALARMS

OVERRIDES

BALANCE- TEST

Programming the Controller

Initialization

When power is ﬁ rst applied, STATUS 1 LED and STATUS 2 LED will ﬂ ash out the controller address. STATUS 1 LED will ﬂ ash to represent the tens position. STATUS 2 LED will ﬂ ash to represent the ones position. After the controller address has ﬂ ashed, STATUS 1 LED and STATUS 2 LED will ﬂ ash the diagnostic blink codes.

Example of a controller address of 59: STATUS 1 LED will ﬂ ash 5 times. STATUS 2 LED will ﬂ ash 9 times.

See Table 5 in the Troubleshooting Section of this manual for

detailed diagnostic blink code information.

Programming the Controller

The next step is programming the controller for your speciﬁ c requirements. In order to configure and program the VCB-X Controller, you must use an operator interface. Three different operator interfaces are available for programming and monitoring

of the VCB-X Controller. See Figure 41. They are as follows:

• Modular Service Tool SD

• System Manager Touch Screen II

• Personal Computer with Prism 2 Computer Front-End Software Installed and the CommLink 5 Communications Interface

If using the Modular Service Tool or System Manager TS with your system, refer to the VCB-X Operator Interface SD Technical Guide and the System Manager T ouch Screen II Technical Guide for complete VCB-X Controller programming instructions.

If using a Notebook or Desktop computer and the Prism Computer Front End Software, refer to the Prism 2 Computer Front-End Technical Guide.

No matter which operator interface you use, we recommend that you proceed with the programming and setup of the VCB-X Controller in the order that follows:

1. Conﬁ gure the Controller for your application.

2. Program the Controller setpoints.

3. Program the Controller operation schedules.

4. Set the Controller current time and date.

5. Review Controller status screens to verify system operation and correct Controller conﬁ guration.

NOTE: For BACnet

Conﬁ guration, see Appendices B & C.

Any of these devices or a combination of them can be used to access the status, conﬁ guration, and setpoints of any controller on your communications loop.

VCB-X Controller Field Technical Guide 55

Figure 41: Modular Service Tool SD, System Manager TS II, and Prism 2 Graphical Software Operator Interfaces

Zone

INPUTS & OUTPUTS

Zone

VCB-X Controller and Expansion Module Input/Output Maps

Input/Output Map

See Table 2 for the VCB-X Controller’s Input/Outputs, Table 3 for the VCB-X EM1 Expansion Module’s Inputs/Outputs, and Table 4

for the VCB-X EM2 Expansion Module’s Inputs/Outputs.

VCB-X CONTROLLER

Analog Inputs

1 Space Temperature (AI1) 2 Supply Air Temperature (AI2) 3 Outside Air Temperature (AI3)

Discharge Temperature (For Digital Compressor)

(AI4)

5 Space Slide Offset (AI5)

Binary Inputs

1 Emergency Shutdown (BI1) 2 Proof of Flow (BI2) 3 Dirty Filter (BI3) 4 Defrost Coil Temperature Switch (BI4)

Analog Outputs (0-10 VDC)

1 Fan VFD (AOUT1) 2 Economizer (Outdoor Air Damper) (AOUT2)

Modulating Heating (Hot Water, Steam, or SCR)

(AOUT3)

Binary Outputs (24 VAC)

1 Fan Relay (R1) 2 Conﬁ gurable Relay (R2) 3 Conﬁ gurable Relay (R3) 4 Conﬁ gurable Relay (R4) 5 Conﬁ gurable Relay (R5)

VCB-X EM1 EXPANSION MODULE

Analog Inputs

1 Static Pressure (AI1) 2 Return Air Temperature (T1) 3 Leaving Water Temperature (T2) 4 Head Pressure 2 (T3) 5 Building Pressure (SIG1) 6 Head Pressure 1 (SIG2)

Binary Inputs

1 Hood On/Off (BIN1) 2 Remote Forced Occupied/Unoccupied (BIN2) 3 Proof of Water Flow (BIN3)

Analog Outputs (0-10 VDC)

1 Exhaust Fan VFD (AOUT1) 2 Chilled Water (AOUT2) 3 Condenser 2 (AOUT3) 4 Condenser 1 (AOUT4)

PWM+/- Output

1 Condenser Fan

Binary Outputs (24 VAC)

1 Conﬁ gurable Relay (R1) 2 Conﬁ gurable Relay (R2) 3 Conﬁ gurable Relay (R3) 4 Conﬁ gurable Relay (R4) 5 Conﬁ gurable Relay (R5)

Table 3: VCB-X EM1 Inputs & Outputs

6 Conﬁ gurable Relay (R6) 7 Digital Compressor Unloader Triac (TR1)

The following E-BUS sensors and modules are available to connect to the VCB-X Controller via E-BUS ports or E-BUS Expansion Modules:

1. E-BUS Digital Room Sensor - LCD Display - Temp Only or Temp & Humidity

2. E-BUS Digital Room Sensor - No LCD Display - Temp & Humidity

3. E-BUS Space and Return Air CO2 Sensors

4. E-BUS connection to EBTRON, GreenTrol and Paragon Air Flow Stations

5. E-BUS Outside Air Temperature & Humidity Sensor

6. Suction Pressure Transducer with E-BUS Adapter Board

Table 2: VCB-X Controller Inputs & Outputs

Revised 7/17/14

VCB-X EM2 EXPANSION MODULE

Analog Input (Conﬁ gurable 0-10 VDC)

1 Economizer Feedback/Remote SAT Reset (AIN1)

Binary Inputs

1 Remote Forced Cooling (BIN1) 2 Remote Forced Heating (BIN2) 3 Remote Forced Dehumidiﬁ cation (BIN3)

Analog Outputs (0-10 VDC)

1 Return Air Damper (AOUT1) 2 Return Air Bypass Damper (AOUT2)

Table 4: VCB-X EM2 Inputs & Outputs

VCB-X Controller Field Technical Guide

INPUTS & OUTPUTS

VCB-X Controller Inputs

AI1 - Space Temperature Sensor Input

The Space Temperature Sensor will initiate Occupied Heating and Cooling modes if the unit is conﬁ gured for Space Temperature control. It is always the sensor used to initiate Unoccupied Heating and Cooling modes. If the Space Temperature Sensor used is equipped with the optional Push-Button Override feature, this input will detect user overrides and switch the unit from the Unoccupied Mode back to the Occupied Mode operation for a user-adjustable amount of time. The Space Temperature can also be conﬁ gured to reset the Supply Air Temperature Setpoint.

AI2 - Supply Air Temperature Sensor Input

Once the unit is in the Heating or Cooling Mode (based on the temperature at the mode enable sensor), the unit will control the staging or modulation of the heating or cooling sources to maintain a Heating or Cooling Supply Air Setpoint. The HVAC unit must always have a Supply Air Temperature Sensor installed.

AI3 - Outdoor Air Temperature Sensor Input

The Outdoor Air Temperature is used to lock out Heating or Cooling to conserve energy at whatever temperature you deem appropriate for each Mode of Operation. This sensor is also used to initiate Heating and Cooling modes on a Make Up Air unit. The Outdoor Air Temperature Sensor can also be used for Pre-Heater operation and for Low Ambient Protection operation.

AI5 - Space Temperature Sensor Slide Adjust

If the Space Temperature Sensor being used has the optional Slide Adjust feature, its AUX output is connected to this input. The Slide Adjust control is used to vary the HVAC Mode Heating and Cooling Setpoints by a user-conﬁ gured maximum amount.

If the Space Temperature is conﬁ gured as the SAT Reset Source, the Slide Adjustment adjusts both the HVAC Mode Enable Heating and Cooling setpoints and the SAT Reset Source Heating and Cooling setpoints simultaneously by a user-conﬁ gurable maximum amount.

BI1 - Emergency Shutdown Input

This wet contact input is used to initiate shutdown of the HVAC unit when a N.C. Smoke Detector (by others), Firestat (by others), or other shutdown condition (by others) contact is opened. The controller remains active and can initiate alarm relays.

BI2 - Proof of Flow Input

A Proof of Flow Switch (by others) that provides a wet contact closure whenever the HVAC unit Supply Fan is operating can be connected to this input. If the Proof of Flow Switch contact opens while the Supply Fan is operating, all Heating and Cooling is suspended or disabled.

BI3 - Dirty Filter Contact Closure Input

This wet contact input is required for Filter Status Indication and requires a Differential Pressure Switch to initiate a Dirty Filter alarm.

NOTE: For AI1 through AI3, all Temperature Sensors must

be Thermistor Type III which provide 77.0°F @ 10K Ohms Resistance.

AI4 - Digital Compressor Discharge

Temperature Sensor lnput

The Digital Compressor Discharge Temperature Sensor monitors the discharge temperature from the Digital Compressor to protect against overheating.

BI4 - Defrost Coil Temperature Switch Input

This wet contact input monitors a Defrost Coil Temperature Switch on air to air heat pump units. If the compressors are operating in the Heating Mode and this switch closes, it will initiate a Defrost Mode.

NOTE: The Binary Inputs require wet contacts (24 VAC

only) to recognize an active input. If you provide dry contacts, the contact closure will not be recognized. All Binary Inputs are optional. This means that you must conﬁ gure the VCB-X Controller to recognize these input signals.

VCB-X Controller Field Technical Guide

INPUTS & OUTPUTS

VCB-X Controller Outputs

Zone

VCB-X Controller Outputs

AOUT3 - Modulating Heat Control Signal

This output can be conﬁ gured with a user-adjustable voltage range

AOUT1 - Supply Fan VFD Control Signal

This user-adjustable voltage signal is used to modulate the Supply Fan VFD in VAV, Single Zone VAV, o r Filter Loading applications.

AOUT2 - Economizer (Outdoor Air Damper) Control Signal

This user-adjustable voltage signal is used to control the Outdoor Air Damper during Economizer operation. It is also used to maintain

of operation which can be set up to provide either a direct or reverse acting operation. This output is used to operate a modulating heating device to maintain the Heating Supply Air Setpoint during the Heat Mode of operation.

TR1 - Digital Compressor Unloader

The unloader solenoid is energized in an on/off pattern to deliver the capacity needed by (1) digital compressor to achieve setpoint.

the Outdoor Air Damper at its Minimum Position during the Occupied Mode when the Outdoor Air Temperature is not suitable for Economizer Cooling purposes. This minimum position can be reset based on CO2 override conditions.

This output is also used to control the Outdoor Air Damper based on an Outdoor Air Flow Setpoint if using an Outdoor Airﬂ ow Monitoring station. This position can be overridden during Economizer Control.

R1 - Supply Fan (Enable)

This is a non-conﬁ gurable output.

R2-R6 - User-Conﬁ gurable Relays

These relays are conﬁ gurable by the user. For all the available

conﬁ guration options, see Table 5.

Finally, this output can be used to control the Outdoor Air Damper during Reverse Acting Building Pressure Control to maintain a Building Pressure Setpoint.

No. Relay Description Details

1 Digital Compressor Conﬁ gured for a Digital Compressor. 2 Cooling Stage Conﬁ gured for each ﬁ xed stage of cooling (except heat pump compressor).

3 Condenser 4 Heating Stage Conﬁ gured for each ﬁ xed stage of heating.

5 Heat Pump Compressor Conﬁ gured for a Fixed Heat Pump Compressor stage. 6 Reversing Valve Conﬁ gured for the Reversing Valve of a heat pump unit. 7 Aux Heat Conﬁ gured for a ﬁ xed stage of Aux Heat in a heat pump unit. 8 Emergency Heat Conﬁ gured for a ﬁ xed stage Emergency Heat in a heat pump unit. 9 Mod Heat Enable Conﬁ gure if a 0-10 VDC Modulating Heat source needs a relay to enable it.

10 Mod Cool Enable Conﬁ gure if a 0-10 VDC Modulating Cool source needs a relay to enable it. 11 Pre-Heat Conﬁ gure this relay for Pre-Heat operation. See Pre-Heat Sequence for details. 12 Low Ambient Conﬁ gure this relay for Low Ambient operation. See Low Ambient Sequence for details.

13 Economizer Active

14 Occupied Active If conﬁ gured, this relay will energize whenever the unit is in the Occupied Mode. 15 Override Active If conﬁ gured, this relay will energize anytime the space sensor Pushbutton override is active.

16 Alarm Active If conﬁ gured, this relay will energize anytime a VCB-X alarm is active.

Morning Warm-Up / Cool-

Down (VAV Boxes) 18 Reheat Conﬁ gure (1) Relay for On/Off Reheat when used. 19 Exhaust Fan Conﬁ gure (1) Relay for enabling exhaust fan when Building Pressure Control is used.

20 Heat Wheel

Conﬁ gured for Condenser Fan or Condenser Water Valve operation. This relay will be active anytime a compressor is active, except if this is an air to air heat pump in the Heat Pump Defrost Mode.

If conﬁ gured, this relay will energize when the unit is in the Economizer Mode or when the damper opens on a Make-Up Air unit.

Conﬁ gure (1) Relay for Morning Warm-Up / Cool-Down when Non-Orion VAV/Zone Controllers are used.

Conﬁ gure (1) Relay that turns heat wheel on when in occupied operation and turns heat wheel off when in Economizer Mode.

Table 5: User-Conﬁ gurable Relay Outputs

Revised 4/11/14

VCB-X Controller Field Technical Guide

INPUTS & OUTPUTS

VCB-X EM1 Expansion Module Inputs & Outputs

VCB-X EM1 Expansion Module

AI1 - Duct Static Pressure Sensor Input

This phone jack-style input connection accepts a Duct Static Pressure Sensor modular cable input. The Duct Static Pressure Sensor reading is used to determine current Duct Static Pressure. This Static Pressure reading is used to control the output signal supplied to the Supply Fan VFD or Zoning Bypass Damper Actuator. If you have conﬁ gured the HVAC unit for Constant Volume operation, this Sensor is optional. If it is installed on a Constant Volume unit, it will not affect operation, but rather will be used as a status-only reading.

T1 - Return Air Temperature Sensor Input

If you want to generate occupied Heating and Cooling demands based on Return Air Temperature, select this Sensor as the HVAC Mode Enable Sensor. The Return Air Temperature Sensor is also used to initiate or cancel the Morning Warm-up Period on VAVconﬁ gured units. If a Return Air Temperature Sensor is connected, the Return Air Temperature must be at least 5°F above the Outdoor Air Temperature to allow Economizer Cooling operation.

T2 - Leaving Water Temperature Sensor Input

This input monitors the Condenser Leaving Water Temperature and determines if the water source condenser is operating in a safe water temperature range.

T3 - Head Pressure 2 Transducer Input

The Head Pressure 2 Transducer is connected to this input when Head Pressure Control is required.

SIG1 - Building Static Pressure Sensor Input

This Sensor is only required if you wish to conﬁ gure the VCB-X Controller for Building Pressure Control. Building Pressure Control can be accomplished by using one of two main control methods. One control method uses the 0-10 VDC signal to control an Exhaust Fan VFD or an Exhaust Damper Actuator for Direct Acting Pressure Control applications. In addition, for Reverse Acting Pressure Control applications, it can control an Outdoor Air Damper Actuator. The other available control method is to conﬁ gure one of the Output Relays as an Exhaust Fan output that will activate the Exhaust Fan any time the Building Pressure is above the Building Pressure Setpoint.

SIG2 - Head Pressure 1 Transducer Input

The Head Pressure 1 Transducer is connected to this input when Head Pressure Control is required.

BIN1 - Hood On Input

When this wet contact input closes (Hood On), the VCB-X Controller switches from Indoor Air Control to Outdoor Air Control. This is typically used on CAV applications requiring CAV/MUA Dual Damper (Hood On/Off) Modes.

BIN2 - Remote Forced Occupied Mode Input

When this wet contact input closes, it will force the VCB-X Controller into the Occupied Mode. When the Remote Forced Occupied Signal is removed, the controller will revert to the Unoccupied Mode of operation if no internal or external schedule has been conﬁ gured or is in effect when this occurs.

+5V VDC Power

This output is a 5 VDC output that supplies power to the Head Pressure Transducer.

BIN3 - Water Proof of Flow Input

This wet contact input is for the Water Proof of Flow Switch. If the Water Proof of Flow Switch contact opens while the Condenser Valve is operating, the controller will react to protect the system depending on the current mode of operation.

NOTE: The Binary Inputs require wet contacts (24 VAC

VCB-X Controller Field Technical Guide

Revised 7/17/14

Zone

INPUTS & OUTPUTS

Zone

VCB-X EM1 & EM2 Expansion Module Inputs & Outputs

AOUT1 - Building Pressure Control Signal

This user-adjustable voltage signal is used to provide Direct Acting Building Pressure Control using an Exhaust Fan VFD or a modulating Exhaust Damper.

NOTE: For Reverse Acting Building Pressure Control us-

ing the Outdoor Air Damper or Supply Fan VFD, the VCB-X Controller will use the outputs speciﬁ c to those devices. On the main VCB-X Controller, AOUT2 would control the Outdoor Air Damper and AOUT1 would control the Supply Fan VFD to maintain the Building Pressure Setpoint.

AOUT2 - Modulating Chilled Water Signal

This output is used to control a Modulating Chilled Water Valve to maintain the Cooling Supply Air Temperature Setpoint. This output can be conﬁ gured with a user-adjustable voltage range of operation which can be set up to provide either direct or reverse acting operation.

AOUT3 - Condenser 2 Fan VFD or Condenser Water Valve Signal

This is a direct acting output signal that is used to modulate the Condenser Fan VFD (0-10 VDC signal) on an Air Cooled unit. It will control a Condenser Water Valve Actuator (2-10 VDC Signal) on a unit conﬁ gured as a Water Source Heat Pump.

AOUT4 - Condenser 1 Fan VFD or Condenser Water Valve Signal

PWM+

This output connects to the plus (+) input on an ECM motor for Condenser Fan control.

PWM-

This output connects to the minus (-) input on an ECM motor for Condenser Fan control.

VCB-X EM2 Expansion Module

AIN1 - Economizer Feedbac k/ Remote SA T Reset Signal

If Title 24 Economizer operation has been conﬁ gured, this input will be used for the 0-10 VDC Feedback Signal from the Economizer actuator. Otherwise, if a Remote SAT Reset Signal is conﬁ gured as the Reset Source, this input can be used to accept a conﬁ gurable voltage input between 0-10 VDC (Direct or Reverse Acting) to reset the Supply Air Temperature Setpoint. See the Supply Air Temperature Reset section in the Sequence of Operations for more details.

BIN1 - Remote Forced Cooling Mode Input

A wet contact closure on this input is used to provide a means for another BAS or control device (by others) to force the unit into Cooling Mode.

BIN2 - Remote Forced Heating Mode Input

A wet contact closure on this input is used to provide a means for another BAS or control device (by others) to force the unit into Heating Mode.

BIN3 - Remote Forced Dehumidiﬁ cation Input

A wet contact closure on this input is used to provide a means for another BAS or control device (by others) to force the VCB-X Controller into Dehumidiﬁ cation Mode.

AOUT1 - Return Air Damper Actuator Signal

This output signal is a Direct Acting 0-10 VDC output signal that is used to modulate a Return Air Damper Actuator in concert with a Return Air Bypass Damper Actuator for AAON® PAC or DPAC control schemes.

AOUT2 - Return Air Bypass Damper Actuator Signal

This output signal is a Direct Acting 0-10 VDC output signal that is used to modulate a Return Air Bypass Damper Actuator in concert with a Return Air Damper Actuator for AAON® PAC or DPAC control schemes.

E-BUS 12-Relay Expansion Module

R1-R5 - User-Conﬁ gurable Relays

These relays are conﬁ gurable by the user. For all the available

conﬁ guration options, see Table 5.

Revised 7/17/14

Please refer to the user-conﬁ gurable relays in Table 5 for relay

deﬁ nitions.

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Supply Fan & Occupied/Unoccupied Operation

Supply Fan Operation

Anytime the Supply Fan is requested to start, a 1 minute minimum off timer must be satisﬁ ed. If the timer is satisﬁ ed, the Supply Fan relay is activated while all other outputs are held off until their minimum off timers have been met.

Upon going into the Occupied Mode or upon power-up, the controller will initiate a user-adjustable Fan Starting Delay to provide a staggered start for systems with several HVAC units.

In Fan Cycle Mode or when going unoccupied, the Supply Fan is held on for 2 minutes after the last stage of Heating or Cooling stages off.

Purge Mode

When going into Occupied Mode, an optional “Purge Mode” is initiated. The fan runs with the Economizer closed, and all Cooling and Heating is de-energized. The length of the Purge Mode is useradjustable.

Occupied Mode

The Supply Fan can be conﬁ gured to run continuously (default) or to cycle with Heating, Cooling, or Dehumidiﬁ cation.

Unoccupied Mode

The Supply Fan will cycle on a call for Heating, Cooling, or Dehumidiﬁ cation.

HVAC Source Conﬁ guration Options

The VCB-X Controller can be conﬁ gured to have various HVAC Source options that will determine the mode of operation (Heating, Cooling, or Vent Mode) of the unit. The following are descriptions of those options.

Space Temperature—Typical selection for CAV

recirculating units.

Return Air Temperature—Optional selection for CAV

recirculating units.

Single Zone VAV—Selected for a Space Temperature

controlled Single Zone VAV application.

Outdoor Air Temperature—Typical selection for 100%

Outdoor Air (MUA) or High Percentage Outdoor Air units.

Supply Air Temperature—Selected for Cooling Only

VAV units with optional Morning Warm-Up.

HVAC Mode Set by Remote Contact Input— Provides

for wet contact closures to force the unit into Heating, Cooling, and Dehumidiﬁ cation modes. If this option is selected, it applies to all three modes, and all three modes will only be initiated by these contact closures.

Occupied/ Unoccupied Mode of Operation

The VCB-X Controller can utilize several methods for determining the Occupied Mode of Operation. These are as follows:

Forced Schedule Remote Forced Occupied Signal Internal Week Schedule Push-Button Override Signal

Forced Schedule

The VCB-X Controller can be forced into the Occupied Mode by inputting a Forced Schedule from any operator interface.

Remote Forced Occupied Signal

This Forced Occupied input can be used in place of, or in conjunction with, the internal VCB-X Schedule. When this wet contact input closes, it will force the VCB-X Controller into the Occupied Mode. When the Remote Forced Occupied Signal is removed, the controller will revert to the Unoccupied Mode of operation, or if an internal VCB-X schedule is also being used, it will revert back to the current scheduled mode.

Setting the Internal Week Schedule to ‘0’ will cause the controller to only look for the Remote Forced Occupied Signal for Occupied/ Unoccupied commands.

Internal Week Schedule

An Internal Week Schedule, which supports up to two start/stop events per day and allows scheduling of up to 14 holiday periods per year is available for determining Occupied and Unoccupied Schedules. It also allows for daylight savings conﬁ guration.

Unoccupied Operation

Uses Unoccupied Setback Offset Setpoints for heating and cooling calls. If Unoccupied Setback Setpoints are left at the default 30°F, no Unoccupied Setback operation will occur and the unit will be off.

The Outdoor Air Damper will be closed except if the unit is in unoccupied Economizer Free Cooling mode.

Space Temperature with High Outdoor Air %— Pro-

vides Space Temperature (instead of Outdoor Air Temperature) control of 100% or high percentage Outdoor Air units by tempering the air during the Space Vent Mode of operation to prevent dumping of hot or cold air into the space.

VCB-X Controller Field Technical Guide

If there is no call for Heating or Cooling, the unit will be off.

Revised 2/14/14

SEQUENCE OF OPERATIONS

Cooling Mode & Economizer

Zone

HVAC Modes of Operation

There are 7 possible HVAC Modes of Operation. They are as follows:

• Cooling Mode

• Heating Mode

• Vent Mode

• Dehumidiﬁ cation Mode

• Heat Pump

• Warm-Up Mode / Cool-Down Mode

• Off Mode

Cooling Mode

Occupied Cooling is enabled when the temperature at the Mode Enable Sensor rises one deadband above the Cooling Setpoint. Cooling is disabled when the Mode Enable temperature falls one deadband below the Cooling Setpoint. The setpoint and deadband are user-adjustable.

Unoccupied Cooling operation is enabled when the Space Temperature rises above the Cooling Mode Enable Setpoint plus the Unoccupied Cooling Offset.

Mechanical cooling is disabled if the Outdoor Air Temperature (OAT) falls 1° below the Cooling Lockout Setpoint and will remain disabled until the OAT rises 1° above the Cooling Lockout Setpoint. If the OAT disables mechanical cooling while it is currently operating, mechanical cooling will stage off as minimum run times and stage down delays are satisﬁ ed.

If the economizer is enabled, it will function as the ﬁ rst stage of cooling (see Economizer section).

Cooling without Digital Scroll Compressor

Available cooling options are staged DX, Modulating Chilled Water, and On/Off Chilled Water.

Cooling with Digital Scroll Compressor

In the Cooling Mode, as the Supply Air Temperature (SAT) rises above the Active Supply Air Cooling Setpoint (see Supply Air Temperature Setpoint Reset section for explanation), the Digital Compressor will stage on and modulate to control to the Active Supply Air Cooling Setpoint. One Digital Compressor can be controlled with the VCB-X Controller.

If additional cooling is required, ﬁ xed compressor stages can be staged on while the Digital Compressor continues to modulate.

To stage up the extra compressor(s), the SAT needs to be above the Active Supply Air Cooling Setpoint and the Digital Compressor needs to be at 100% for a period of time equal to the Stage Up Delay. Once a ﬁ xed compressor is enabled, the digital compressor signal will go to 50% and modulate up as needed. This will repeat as additional ﬁ xed compressors are staged up. For compressors to stage on, Minimum Off Times (adj.) must be satisﬁ ed as well as Stage Up Delays (adj.).

To stage down the extra compressor(s), the SAT needs to be below the Active Supply Air Cooling Setpoint minus the Cooling Stage Control Window, the Digital Compressor needs to be below 30%, and the Stage Down Delay requirement met. Once a ﬁ xed compressor stages off, the digital compressor will go to 50% and modulate down as needed. This will repeat as additional ﬁ xed compressors stage off.

For compressors to stage down, Minimum Run Times (adj.) must be satisﬁ ed as well as Stage Down Delays (adj.). The digital compressor is always the last compressor to be deactivated.

Modulating Cooling Signal Control

If Modulating Chilled Water or a Digital Scroll Compressor is being used, the Modulating Cooling Proportional Window is used to determine the signal to the Modulating Cooling Source and is useradjustable. The Modulating Cooling signal is calculated based on the differential between the Supply Air Temperature and the Active Supply Air Temperature Setpoint based on the Modulating Cooling Proportional Window.

In the Cooling Mode, as the Supply Air Temperature (SAT) rises above the Active Supply Air Cooling Setpoint (see Supply Air Temperature Setpoint Reset section for explanation), cooling will begin to stage on or to modulate. Each stage must meet its Minimum Off Time (adj.) before it is allowed to energize, and successive stages are subject to a Cooling Stage Up Delay (adj).

Cooling stages will continue to run until the SAT falls below the Active Supply Air Temperature Setpoint minus the Cooling Stage Control Window at which point the cooling will begin to stage off. Each stage must meet its Minimum Run Time (adj.) before it is allowed to stage off and successive stages are subject to a Cooling Stage Down Delay (adj.).

The Maximum Signal Adjustment per Time Period is 10% and is not user-adjustable. The Minimum Signal Adjustment per Time Period is based on the Modulating Cooling Proportional Window. The larger the Modulating Cooling Proportional Window, the smaller the signal adjustment will be per Time Period. The Time Period is the delay between another increase or decrease in the Modulating Cooling Source Signal and is user-adjustable. For example, if the Modulating Cooling Proportional Window is 5°F, the signal would adjust 2% per °F each Time Period above or below the Active Supply Air Temperature Setpoint. When the Supply Air Temperature is above or below the Active Supply Air Temperature Setpoint by 5°F or more, the signal would adjust 10% each Time Period.

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Dehumidiﬁ cation

Economizer Operation

Economizer operation is enabled when the Outdoor Air (OA) drybulb, wetbulb, or dewpoint temperature falls below the Economizer Enable Setpoint by 1°. Economizer operation is disabled when the OA temperature rises 1° above the Economizer Enable Setpoint.

The Economizer acts as the 1

stage of cooling and controls to the Active Supply Air Cooling Setpoint. An Economizer Minimum Position can be programmed into the controller. During Economizer Operation, the economizer will modulate between this minimum position and 100%. If the economizer reaches 100% and the Supply Air Temperature is still above setpoint, mechanical cooling is then allowed to stage up while the economizer is held at the full open position. Any time cooling stages are currently running, and the economizer becomes enabled, it will immediately open to 100%.

During Heating and Vent Modes, the economizer will remain at its minimum position. During Unoccupied Mode, the Economizer can be used for night setback free cooling; otherwise it will remain closed.

Dehumidiﬁ cation Mode

O n VAV, C AV, S i n gle Zone VAV, and High Percentage Outdoor Units with Space Temperature Control, the Dehumidiﬁ cation Mode is initiated when the Indoor Humidity rises above the Low Indoor Humidity Setpoint. The unit will leave the Dehumidiﬁ cation Mode when the humidity falls 1% below this setpoint.

On 100% Outdoor Air (MUA) units with Outdoor Air Temperature Control, Dehumidification is initiated when the Outdoor Air Dewpoint rises above the Outdoor Air Dewpoint Setpoint. The unit will leave the Dehumidiﬁ cation Mode when the humidity falls 1% below this setpoint. The Outdoor Air Dewpoint is calculated using the Outdoor Air Temperature and the Outdoor Air Humidity.

There are four conﬁ guration options for Dehumidiﬁ cation operation.

In Occupied Vent Mode Only—Dehumidiﬁ cation can only be

initiated in the Occupied Mode when there is no call for Heating or Cooling. This creates a Vent Dehumidiﬁ cation Mode.

In Both Occupied and Unoccupied Vent Mode—Dehumid-

iﬁ cation can be initiated in the Occupied and Unoccupied Modes when there is no call for Heating or Cooling. This creates a Vent Dehumidiﬁ cation Mode.

NOTE: Do not use this option on a MUA unit that does not

have return air and which is not conﬁ gured for space controlled Night Setback operation. Damage to the unit could occur since the OA damper remains closed in the Unoccupied Mode.

In All Modes while Occupied—Dehumidiﬁ cation can be initiated

anytime in the Occupied Mode during Cooling, Heating, or Vent Mode. This can create a Cooling Dehumidiﬁ cation Mode, a Heating Dehumidiﬁ cation Mode, or a Vent Dehumidiﬁ cation Mode.

In All Modes while Occupied and Unoccupied—Dehumid-

iﬁ cation can be initiated anytime in the Occupied or Unoccupied

Mode during Cooling, Heating, Vent, or Off Mode. This can create a Cooling Dehumidiﬁ cation Mode, a Heating Dehumidiﬁ cation Mode, or a Vent Dehumidiﬁ cation Mode. This conﬁ guration should not be used for an MUA unit with no return air, since it could start the unit in the Unoccupied Mode when the Outdoor Air damper is closed. Any calls for Unoccupied Dehumidiﬁ cation use the same Dehumidiﬁ cation Setpoint as during the Occupied Mode since you never want humidity to get out of control.

NOTE: Do not use this option on a MUA unit that does not

have return air and which is not conﬁ gured for space controlled Night Setback operation. Damage to the unit could occur since the OA damper remains closed in the Unoccupied Mode.

There is no Dehumidiﬁ cation allowed during Heat Mode on a Heat Pump unit.

NOTE: Compressor Lockout Setpoints are ignored during

dehumidiﬁ cation since the compressors are controlled by coil temperature.

Dehumidiﬁ cation Operation

For DX Cooling Stages, the VCB-X activates the Cooling Stages based on the actual Evaporator Coil Temperature compared to the Evaporator Coil Temperature Setpoint. The Evaporator Coil Temperature is calculated by using the Suction Pressure Sensor and converting the pressure to temperature.

For Copeland Digital Scroll™ Compressor units, the VCB-X will modulate the Copeland Digital Scroll™ Compressor to maintain the Evaporator Coil Temperature Setpoint and activate Fixed Capacity Compressors as necessary.

If the Fixed Capacity Compressor is activated, the Copeland Digital Scroll™ Compressor will only be allowed to modulate within the range of 70% - 100% in order to prevent the loss of reheat capacity during low load conditions. If, with both compressors on, the digital compressor has modulated down to its 70% minimum and the Coil Suction Temperature falls below the Coil Temperature Setpoint minus the Cooling Stage Control Window, then the second compressor will stage off once its Compressor Minimum Run Time and the Stage Down Delay Timers have been met. At that point, the Copeland Digital Scroll™ Compressor can modulate down as needed to maintain the Coil Temperature Setpoint.

SAFETY: If the Coil Temperature drops below 32˚F, any

cooling remaining on will be forced to stage off.

For Modulating Chilled Water units, the VCB-X will modulate the Chilled Water Valve to a ﬁ xed 100% position during Dehumidiﬁ cation to provide full moisture removal capabilities. With On/Off Chilled Water units, the Cooling Relay will energize to open the valve.

During Dehumidification, the Economizer will be held to its minimum position.If the unit will be using the CAV/MUA Dual Mode (Hood On/Off) Operation, Dehumidiﬁ cation will require the use of an Outdoor and Indoor Humidity Sensor.

VCB-X Controller Field Technical Guide

Revised: 9/3/14

Zone

SEQUENCE OF OPERATIONS

Dehumidiﬁ cation and Economizer Operation

Zone

Reheat

During the Dehumidiﬁ cation Mode, the VCB-X activates Cooling to extract moisture from the Supply Air and utilizes either Modulating Hot Gas Reheat, On/Off Hot Gas Reheat, or Heating to reheat the Supply Air. Hot Gas Reheat is the standard form of Reheat.

Reheat is always controlled to the Active Supply Air Setpoint (see the Supply Air Temperature Setpoint Reset section for further explanation) which will be different depending on whether the unit is in Cooling Mode Dehumidiﬁ cation, Heating Mode Dehumidiﬁ cation, or Vent Mode Dehumidiﬁ cation.

During Cooling Dehumidiﬁ cation, Reheat is controlled to the Active Cooling Supply Air Setpoint. During Heating Dehumidiﬁ cation, Reheat is controlled to the Active Heating Supply Air Setpoint. During Vent Dehumidiﬁ cation, Reheat is controlled to a calculated setpoint that is halfway between the Heating and Cooling Mode Enable Setpoints.

If the unit is equipped with a Modulating Hot Gas Reheat Controller (MHGRV-X), then during Dehumidiﬁ cation, it will modulate the reheat valve to maintain the Supply Air Temperature at the Active Supply Air Temperature Setpoint.

If the unit is equipped with an On/Off Hot Gas Valve, then one of the relays will be conﬁ gured for Reheat. The Reheat Relay will be activated if the SAT is less than the SAT Setpoint. The Hot Gas Reheat Relay will remain on during the Dehumidiﬁ cation Mode regardless of the Supply Air Temperature. This is to ensure a steady Supply Air Temperature.

The HVAC unit’s Heat Source or a Heat Source located in the Supply Air Duct can be used for Reheat if the unit is not equipped with Hot Gas Reheat or to supplement Hot Gas Reheat. Please read the warning that follows regarding applications that operate Heating and Cooling simultaneously.

WARNING: Simultaneous Heating and Cooling cannot be

approved unless the HVAC unit has been speciﬁ cally designed for this purpose. A Special Price Authorization (SPA) must be obtained from the AAON

factory for these applications to avoid warranty and/or rating problems. WattMaster Controls Inc. assumes no liability for any Simultaneous Heating and Cooling application if a SPA is not obtained from the AAON

Factory at the time the HVAC unit is ordered.

When Heating is used for Reheat instead of Hot Gas Reheat, the VCB-X can activate the Heat Source(s) discussed in the Heating Mode section. When Heating is used to supplement Hot Gas Reheat, the VCB-X restricts the Heating to one form of Modulating Heat or one stage of Gas or Electric Heat.

NOTE: MODGAS cannot be used in conjunction with

Modulating Hot Gas Reheat to add additional reheat.

Coil Temperature Reset

The Indoor Humidity can be used to reset the Coil Temperature Setpoint. A user adjustable range of Indoor Humidity values can be used to reset the Coil Temperature Setpoint between a user adjustable range of values. As the Indoor Humidity rises within its range the Coil Temperature Setpoint will be lowered within its range.

Return Air Bypass Damper Control

The Return Air Bypass (RAB) Damper is only used on constant air volume units with space temperature configured as the HVAC Mode Enable sensor. The RAB Damper is only active during the Dehumidiﬁ cation Mode and is used as the ﬁ rst form of Reheat. If the HVAC unit is equipped with modulating Hot Gas Reheat, the RAB Damper needs to be at 100% before the modulating Hot Gas Reheat can be used. The RAB Damper modulates from 0-100% as the Space Temperature falls below the Cooling Setpoint. When the Space Temperature is equal to the Cooling Setpoint, the RAB Damper will be at 0%. When the Space Temperature falls to halfway between the Cooling and Heating Setpoints, the RAB Damper will be at 100%.

If the HVAC unit is equipped with separate actuators for the Outdoor Air and Return Air Dampers, the Return Air Damper will proportionally close more as the RAB Damper opens. The rate at which the Return Air Damper closes is user-adjustable. The purpose of closing the Return Air Damper more as the RAB Damper opens is to allow more air to bypass the evaporator coil through the RAB Damper. If you want more air to pass through the RAB Damper, enter a larger number in the Return Air Damper Factor setpoint. If you want less air to pass through the RAB Damper, enter a smaller number in the Return Air Damper Factor setpoint.

NOTE: See page 6 for speciﬁ c AAON

DPAC and PAC

operation.

Revised: 8/14/13

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Heating Mode, Ventilation Mode & Off Mode

Heating Mode

Available heating options are Staged Gas, Modulating Gas, Staged Electric, On/Off Hot Water, Modulating Hot Water, and Modulating SCR Electric.

Heating is enabled when the temperature at the Mode Enable Sensor falls one deadband below the Heating Setpoint. Heating is disabled when the Mode Enable temperature raises one deadband above the Heating Setpoint.

In the Heating Mode, as the Supply Air Temperature falls below the Active Supply Air Heating Setpoint (see Supply Air Temperature Setpoint Reset section for explanation), the heating will begin to stage on or to modulate. Each stage must meet its Minimum Off Time (adj.) before it is allowed to energize, and successive stages are subject to a Heating Stage Up Delay (adj).

Heating stages will continue to run until the Supply Air Temperature rises above the Active Supply Air Temperature Setpoint plus the Heating Stage Control Window at which point the heating will begin to stage off. Each stage must meet its Minimum Run Time (adj.) before it is allowed to stage off, and successive stages are subject to a Heating Stage Down Delay (adj.).

Mechanical heating is disabled if the Outdoor Air Temperature (OAT) rises 1° above the Heating Lockout Setpoint and will remain disabled until the OAT falls 1° below the Heating Lockout Setpoint. If the OAT disables mechanical heating while it is currently operating, mechanical heating will stage off as minimum run times and stage down delays are satisﬁ ed.

Modulating Heating

The VCB-X supports various forms of Modulating Heat such as SCR Electric Heat, Modulating Hot Water Heat, and Modulating Steam Heat. This references Modulating Heat that is controlled from AOUT3 on the VCB-X Controller with a user-adjustable voltage range between 0-10 VDC. Modulating Gas, which is controlled by the ModGas-X Controller, is not included in this section. Whichever form of Modulating Heating is used, the VCB-X will modulate the Heat Source to achieve the Active Supply Air Temperature Setpoint.

The Modulating Heating Proportional Window is used to determine the signal to the Modulating Heating Source and is user-adjustable. The Modulating Heating Signal is calculated by the differential between the Supply Air Temperature and the Active Supply Air Temperature Setpoint based on the Modulating Heating Proportional Window. The maximum signal adjustment per Time Period is 10% and is not user- adjustable. The minimum signal adjustment per Time Period is based on the Modulating Heating Proportional Window. The larger the Modulating Heating Proportional Window, the smaller the signal adjustment will be per Time Period. The Time Period is the delay between another increase or decrease in the Modulating Heating source signal and is user-adjustable.

For example, if the Modulating Heating Proportional Window is 5°F, the signal will be adjusted 2% per °F each Time Period above or below the Active Supply Air Temperature Setpoint. When the Supply Air Temperature is above or below the Active Supply Air Temperature Setpoint by 5°F or more, the signal will adjust 10% each Time Period.

Primary and Secondary Heating

The VCB-X can activate two forms of Heating, which are classiﬁ ed as Primary and Secondary Heat Sources. The following section describes that operation.

Primary Modulating Heat with Secondary Staged Heat

The Modulating Heat source can be ModGas, Modulating Hot Water, Modulating Steam, or SCR Electric Heat. In this case the modulating heat will be the ﬁ rst form of heat used and will operate as described above to attempt to achieve the Active Supply Air Heating Setpoint. If the modulating heat reaches 100%, the Heating Stage Up Delay begins. If the Primary Heat Source is still at 100% after the Heating Stage Up Delay expires, the Secondary Heat Source will activate. The Primary Heat Source can then modulate as necessary to achieve the Active Supply Air Heating Setpoint. If there are additional stages of heat, they will stage up as described, with the Primary Heat Source modulating as necessary.

If the Secondary Heat Source is activated and the Primary Heat Source has modulated to 0%, the Heating Stage Down Delay will begin. If the Primary Heat Source is still at 0% after the Heating Stage Down Delay expires, the Secondary Heat Source will deactivate. If there are multiple stages of Secondary Heat, they will stage off in the same manner. Then, if the Supply Air Temperature rises above the Active Supply Air Heating Setpoint plus the Heating Stage Control Window, the Primary Heat Source will modulate to 0% to allow the Supply Air Temperature to cool off.

Ventilation Mode

This mode is only available in the Occupied Mode of operation on units conﬁ gured for continuous Supply Fan operation and is generated anytime there is no demand for heating or cooling. The fan will operate at the conﬁ gured Minimum Vent speed.

Off Mode

Off Mode occurs in the Unoccupied Mode when there is no heating or cooling demand. The Supply Fan is off and the outside air damper is closed.

Off Mode can only occur in the Occupied Mode if the fan is conﬁ gured to cycle with heating and cooling and there is no call for heating or cooling. Space Sensor Operation

VCB-X Controller Field Technical Guide

Zone

SEQUENCE OF OPERATIONS

Zone

Remote Contact Control, Space Sensor Operation, IAQ

VCB-X Remote Contact Control

A Remote Contact Control option can be conﬁ gured on the VCB-X Controller to initiate the HVAC Modes of operation. If this option is conﬁ gured, all Heating, Cooling, and Dehumidiﬁ cation modes will only be initiated based on 24 VAC wet contact closures on the Forced Heating, Forced Cooling, and Forced Dehumidiﬁ cation inputs on the EM2 Expansion Module. This is a single conﬁ guration option that applies to all three modes.

If both the Forced Heating and Forced Cooling inputs are inactive or if both are simultaneously active, then the unit is in a Vent mode (neutral) state. In this condition in the Occupied Mode, only the fan would be on for ventilation. In this condition in the Unoccupied Mode, the unit would just be Off.

If Forced Dehumidiﬁ cation is also being used, it will operate in conjunction with the Forced Heating and Forced Cooling inputs according to which Dehumidiﬁ cation option you have conﬁ gured. The four conﬁ guration options are described in the Dehumidiﬁ cation

Mode section on page 63.

Space Sensor Operation

Space Sensors are available as a Plain Sensor, Sensor with Override, Sensor with Setpoint Slide Adjust, and Sensor with Override and Setpoint Slide Adjust (this is the version that is factory supplied).

An E-BUS Digital Space Sensor is also available with override and setpoint adjustment capability.

Sensors with Setpoint Slide Adjust can be programmed to allow Space Setpoint adjustment of up to ± 10° F.

the High CO Position will be reset to the Maximum Reset Position.

3. The Maximum Reset Position Setpoint is the highest the Economizer Minimum Position can be reset to during

Control Operation. This setpoint is user-adjustable

and does not keep the Economizer from opening further during Economizer operation.

4. CO with Outdoor Airﬂ ow control of the Outdoor Air Damper in this version.

Level Setpoint, the Economizer Minimum

Economizer control cannot be used in conjunction

Morning Warm-Up Mode Operation

NOTE: Morning Warm-Up can now be conﬁ gured for any

application but should not be used on 100% Outdoor Air Units, since the Outdoor Air Damper remains closed during Warm Up.

When the VCB-X Controller is conﬁ gured for Morning Warm Up and switches to the Occupied Mode of Operation (not Override or Force Mode), the unit compares the Return Air Temperature to a Morning Warm-Up Target Temperature. If the Return Air Temperature is below this Setpoint, the Warm-Up Mode is initiated. Heating will then be controlled to the Warm-Up Supply Air Temperature Setpoint.

This Mode remains in effect until the Return Air Temperature rises above the Target Temperature or a user-adjustable Time Period expires. Warm-Up Mode is not initiated by Push-Button Overrides or Unoccupied Heating demands. The Outdoor Air Damper remains closed during Warm-Up Mode.

If the Space Temperature is the SAT/Reset Source, then the Slide Adjust will adjust the HVAC Mode Enable Setpoints and the SAT/ Reset Source Setpoints simultaneously.

During Unoccupied hours, the Override Button can be used to force the unit back into the Occupied Mode (by pressing the button for less than 3 seconds) for a user-deﬁ ned override duration of up to

8.0 hours. Pressing the button between 3 to 10 seconds cancels the override.

IAQ (CO2) Control Operation

If you have conﬁ gured the VCB-X Controller to monitor and control CO2 levels, the Economizer operation will be modiﬁ ed as follows:

1. If the CO Setpoint, the Economizer Minimum Position will remain at its conﬁ gured value.

2. As the level of CO Level Setpoint, the Economizer Minimum Position will begin to be reset higher. The Economizer Minimum Position will be proportionally reset higher as the CO2 rises within the range set by the Minimum CO2 Level Setpoint and the Maximum CO2 Level Setpoint. If the CO2 level reaches

levels remain below the Low CO2 Level

increases above the Minimum CO2

Once the Warm-Up Mode has been terminated, it cannot resume until the unit has been through a subsequent Unoccupied Mode. Only one Warm-Up Mode is allowed per Occupied cycle.

If you have stand-alone VAV boxes that need to be forced wide open during the Warm-Up Mode, you can conﬁ gure one of the relay outputs to be used during this Mode. If the Warm-Up Mode is active, the relay is activated. This relay then becomes the Force Open Command for all VAV boxes to which it is wired.

Morning Cool-Down Mode Operation

When the VCB-X Controller is conﬁ gured for Morning Cool-Down and switches to the Occupied Mode of Operation (not Override Mode), the unit compares the Return Air Temperature to a CoolDown Target Temperature. If the Return Air Temperature is above this Setpoint, the Cool-Down Mode is initiated. Cooling will then be controlled to the Cool-Down Supply Air Temperature Setpoint.

This Mode remains in effect until the Return Air Temperature drops below the Target Temperature or a user-adjustable Time Period expires. Cool-Down is not initiated by Push-Button Overrides or Unoccupied Cooling demands. The Outdoor Air Damper remains closed during Cool-Down Mode.

Revised: 8/7/14

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Morning Warm Up and Single Zone VAV

Once the Cool-Down Mode has been terminated, it cannot resume until the unit has been through a subsequent Unoccupied Mode. Only one Cool-Down Mode is allowed per Occupied cycle.

If you have stand-alone VAV boxes that need to be forced wide open during the Cool-Down Mode, you can conﬁ gure one of the relay outputs to be used during this Mode. If the Cool-Down Mode is active, the relay is activated. This relay then becomes the Force Open Command for all VAV boxes to which it is wired.

Single Zone VAV

Single Zone VAV Operation is a hybrid CAV/VAV application where the Supply Fan VFD is modulated to maintain the Space Temperature Setpoint while heating or cooling is modulated to maintain the Leaving Air Setpoint. This application can be conﬁ gured to use VAV Cooling and either VAV Heating or CAV Heating.

VAV Cooling and VAV Heating require modulating cooling and heating sources in order to maintain a constant Leaving Air Temperature no matter what the fan speed is. CAV Heating must be conﬁ gured if using a staged form of heat.

The Space Temperature Sensor determines the heating or cooling mode of operation. Heating and cooling are enabled and disabled as described previously in the Heating and Cooling sections.

In the Cooling Mode, the modulating cooling source will modulate to maintain the Cooling Leaving Air Setpoint. The Supply Fan VFD will begin operation at the Minimum VFD Cooling Speed (30% default) and modulate between this setpoint and 100% as needed to maintain the Space Temperature within the Space Cooling Reset Window created by conﬁ guring a Space Cooling High and a Space Cooling Low Reset Source Setpoint.

If the unit is conﬁ gured for VAV Heating, then in the Heating Mode the modulating heating source will modulate to maintain the Heating Leaving Air Setpoint. The Supply Fan VFD will begin operation at the Minimum VFD Heating Speed (50% default) and modulate between this setpoint and the Maximum VFD Heating Speed (100% default) as needed to maintain the space temperature within the Space Heating Reset Window created by conﬁ guring a Space Heating High and a Space Heating Low Reset Source Setpoint.

If the unit needs to be conﬁ gured for CAV Heating, set the Minimum VFD Heating Speed to be the same as the Maximum VFD Heating Speed desired during heating. Once the unit enters the Heating Mode, the Supply Fan will run at the set Maximum VFD Heating Speed (100% default) and Heating will occur as described in the Heating Section of this sequence.

In the Vent Mode of operation, the Supply Fan will operate at the VFD Vent Speed (user-adjustable).

During Dehumidiﬁ cation, the fan will operate as described above, depending on if the Space Temperature is calling for Cooling, Heating, or Vent Mode of operation.

Whenever the unit is in CO Damper, the minimum VFD Fan Speed is forced to 75% and can modulate up from there.

override operation of the Outdoor Air

Supply Air Temperature Setpoint Reset

Various sources can be configured to reset the Supply Air Temperature (SAT) Setpoint. Since the Supply Air Temperature Setpoints are not ﬁ xed during reset, we refer to them as “Active Supply Air Temperature Setpoints.” The following Reset Source options are available in this release:

1. Space Temperature

2. Outdoor Air Temperature

3. Return Air Temperature

4. Fan VFD Signal

5. Remote SAT Reset Signal

For whatever option is selected, a High and a Low Reset Source Setpoint must be conﬁ gured that will correspond to conﬁ gured Low and High SAT Setpoints. This must be done separately for the Cooling Mode Setpoints and for the Heating Mode Setpoints.

When the Reset Source is at its highest conﬁ gured setpoint, the SAT Setpoint will be reset to its lowest conﬁ gured setpoint. When the Reset Source is at its lowest conﬁ gured setpoint, the SAT Setpoint will be reset to its highest conﬁ gured setpoint.

In all cases, as the Reset Source value moves within its range established by the conﬁ gured High and Low Reset Setpoints, the Supply Air Setpoint will be proportionally reset within its range established by the conﬁ gured Low and High SAT Setpoints.

If a Remote SAT Reset Signal is conﬁ gured as the Reset Source, a conﬁ gurable voltage signal (between 0 and 10 VDC, direct or reverse acting) can be used to reset the Supply Air Temperature Setpoint. You can conﬁ gure what voltage will correspond to the Low SAT Setpoint and what voltage will correspond to the High SAT Setpoint in both the Heating and the Cooling Modes. The EM2 Expansion Module is required for this option.

VCB-X Controller Field Technical Guide

Revised: 4/21/14

Zone

SEQUENCE OF OPERATIONS

Zone

Airﬂ ow Monitoring and Duct Static Pressure Control

Airﬂ ow Monitoring

Outdoor, Supply, Return and Exhaust Airﬂ ow can be monitored using the EBTRON or GreenTrol GA-200-N Module in conjunction with a GreenTrol GF series of airﬂ ow station. Contact WattMaster Controls for information on other airflow station options. The VCB-X will control the Outdoor Air Damper to maintain an Outdoor Air CFM Setpoint. This operation can be overridden higher by normal Economizer control.

override cannot be used in conjunction with airﬂ ow control of

the Outdoor Air Damper in this version.

GTC116 series, Paragon MicroTransEQ series,

Pre-Heater Operation

A Pre-Heat relay can be conﬁ gured to energize anytime the Supply Fan is operating and the Outdoor Air Temperature is below the Pre-Heat Setpoint. This option allows pre-heating of cold outside air before it reaches the evaporator coils and is useful in Hot Water/ Chilled Water applications or during CO2 control of the economizer in low temperature conditions. This operation only occurs in the Occupied Mode of Operation.

Low Ambient Operation

A Low Ambient Relay can be conﬁ gured. Whenever the Outdoor Air Temperature falls below the Low Ambient Setpoint, this Low Ambient Relay will energize. This operation occurs in both the Occupied and Unoccupied Modes of Operation.

Heat Wheel

One of the relay outputs can be conﬁ gured as a Heat Wheel Relay. This relay will enable the Heat Wheel when the unit goes into the Occupied Mode. If the unit is conﬁ gured for Economizer Operation, this relay will disable the Heat Wheel when the unit goes into Economizer Mode. If the Heat Wheel Relay is active, a Heat Wheel Defrost Cycle will occur that will disable the Heat Wheel Relay for 2 minutes if the Outdoor Air Temperature is below the Heat Wheel Defrost Setpoint and 30 minutes have elapsed since the last Heat Wheel Defrost Cycle.

Duct Static Pressure Control

If the VCB-X Controller has been conﬁ gured for Duct Static Pressure Control, then anytime the Supply Fan is operating, the unit will be controlling to a Duct Static Pressure Setpoint. The Static Pressure Control Output Signal can be used to control a Supply Fan VFD (Direct Acting Operation) or a Zoning Bypass Damper Actuator (Reverse Acting Operation).

The Duct Static Pressure Setpoint, the Setpoint Deadband, the Static Pressure Control Signal, and the Static Control Rate are all useradjustable. The Static Control Rate is the amount of time that elapses between each adjustment to the Duct Static Pressure Control Output Signal. The default period is 10 seconds and should not be changed unless close observation reveals that the Supply Fan or Bypass Damper is hunting and not maintaining a stable pressure reading.

For Supply Fan VFD operation, the Output Signal increases (increases the VFD speed) if the Duct Static Pressure is below the Duct Static Pressure Setpoint by the Deadband amount, and the Output Signal decreases (decreases VFD Speed) if the Static Pressure is above the Setpoint by the Deadband amount.

For Bypass Damper operation, the VCB-X will reverse the logic of the Output Signal. The Output Signal decreases (closes the Zoning Bypass Damper) if the Duct Static Pressure is below the Duct Static Pressure Setpoint by the Deadband amount, and the Output Signal increases (opens the Zoning Bypass Damper) if the Duct Static Pressure is above the Duct Static Pressure Setpoint by the Deadband amount.

If the Static Pressure ever rises 0.5” above the Duct Static Pressure Setpoint, the Duct Static Pressure Control Output Signal will be cut in half every control period until the Static Pressure is brought under control. This is to prevent damage to the ductwork if all the VAV boxes are closed or some other blockage occurs in the ductwork.

WARNING: The manufacturer does not assume responsibility

for protecting the equipment from over-pressurization! You should always install mechanical high static protection cutoffs to protect your system!

Any time the Supply Fan is off, the Duct Static Pressure Control Output Signal will remain at zero volts. If Duct Static Pressure Control is not conﬁ gured, the Static Pressure can still be monitored if a Static Sensor is installed, however, no control will occur.

Revised 9/11/13

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Building Pressure Control and CAV/MUA

Duct Static Pressure Control for Filter Loading

In order to maintain a constant CFM through the supply air ducts on a mixed air CAV unit, the VCB-X can utilize a Duct Static Pressure Sensor (used to monitor the discharge pressure) in conjunction with a Supply Fan VFD. If the ﬁ lters are getting dirty, the VCB-X will ramp up the VFD to compensate for the decrease in airﬂ ow. To utilize this feature, the unit must be conﬁ gured to use VFD Fan Control. This feature cannot be used if this is a VAV or Zoning application with typical Duct Static Pressure Control, or if this unit has been conﬁ gured for Single Zone VAV operation.

Building Pressure Control

The VCB-X can maintain Building Static Pressure anytime the Supply Fan is operating. A Building Pressure Transducer must be connected to the VCB-X EM1 Expansion Module. The following are the available control options.

Direct Acting Building Pressure Control

• On/Off Exhaust Fan—If an On/Off Exhaust Fan is

being used, a relay output must be conﬁ gured for “Exhaust Fan”. This relay will energize whenever the Building Pressure rises above the Building Pressure Setpoint by the Deadband amount. The relay will de energize when the Building Pressure falls below the Building Pressure Setpoint by the Deadband amount.

• Exhaust Fan VFD or Modulating Exhaust

Damper—If conﬁ gured for Modulating Exhaust, a user-

adjustable voltage output (AOUT1 – Building Pressure Output on the VCB-X EM1 Expansion Module) will be used to control this fan or damper. An Exhaust Relay can be conﬁ gured if necessary to enable the fan or damper. Whenever the Building Pressure rises above the Building Pressure Setpoint by the Deadband amount, the Exhaust Fan Relay will energize and the Modulat ing Signal will activate to control to the Building Pressure Setpoint. If the Building Pressure falls below the Building Pressure Setpoint by the Deadband amount, the Modulating Signal will modulate towards 0% as it attempts to maintain the Building Pressure Setpoint. The Exhaust Fan Relay is energized whenever the Modulating Signal is above 0%.

Reverse Acting Building Pressure Control

• Outdoor Air Damper—If this option is conﬁ gured,

the VCB-X will use the user-adjustable Economizer/ Outdoor Air Damper output signal (AOUT2 – Economizer Control Signal) to maintain the Building Pressure Setpoint. Whenever the Building Pressure falls below the Building Pressure Setpoint by the Deadband amount, the modulating Economizer Output Signal will modulate the damper open to control to the Building Pressure Setpoint. If the Building Pressure rises above the Building Pressure Setpoint by the Deadband amount, the damper will modulate towards closed as it attempts to maintain the Building Pressure Setpoint. When this option is selected, no Economizer free cooling or CO2 IAQ operation will be available.

• Supply Fan VFD—Contact WattMaster regarding this

Reverse Acting Building Pressure Control option. It should not be used in most applications. If this option is selected, the user-adjustable Supply Fan VFD Output (AOUT1 on the VCB-X) will be used to control the Supply Fan VFD to maintain the Building Pressure Setpoint in similar fashion to the Outdoor Air Damper control described above.

MUA Operation

• Occupied Mode—The VCB-X will use the normal Cooling and Heating Mode Enable Setpoints (not the Hood On Setpoints) in conjunction with the Outdoor Air (OA) temperature sensor to determine the mode of operation. The Outdoor Air Dewpoint Setpoint will initiate the Dehumidiﬁ cation Mode. See the Cooling, Heating and Dehumidiﬁ cation Modes of Operation sections for those details. The Outdoor Air Damper will be modulated to the Economizer Minimum Damper Position (normally set at 100% for a MUA unit).

Unoccupied Mode—Normally, an MUA unit is off

• during the Unoccupied Mode. However, if the unit has Return Air, it can be conﬁ gured to operate as a recirculating Night Setback Controlled unit during Unoccupied Hours. This is accomplished by simply conﬁ guring Night Setback Temperature Setpoints (anything other than the default 30ºF) on a unit that is also conﬁ gured for Outdoor Temperature Control (MUA). With this conﬁ guration, when the unit goes Unoccupied, it will close the Outdoor Air Damper and begin to use a Space Temperature Sensor in conjunction with the existing Heating and Cooling Setpoints, offset by the Night Setbacks, to make Night Setback calls. If a Space Humidity Sensor is installed, and the unit is conﬁ gured for Night Humidity control, the VCB-X Controller will use the Space Humidity Setpoint for unoccupied Dehumidiﬁ cation calls.

VCB-X Controller Field Technical Guide

Revised 4/15/13

Zone

SEQUENCE OF OPERATIONS

Zone

CAV/MUA and Condenser Fan/Water Valve Operation

CAV/MUA Dual Mode ( Hood On/Off Operation)

The VCB-X Controller can be conﬁ gured as a CAV controller but switch to MUA operation when an exhaust hood is energized. This MUA force mode occurs when a 24 VAC wet contact closure is received on the Hood On binary input on the VCB-X EM1 Expansion Module. Under normal operation (CAV), the unit will operate as a recirculating Space Temperature (and Space Humidity) controlled unit.

When the Hood On contact is made, the unit will open the Outdoor Air Damper to its full open position. The Heating and Cooling Modes will then be determined by the Outdoor Air Temperature Sensor using the Hood On Outdoor Air Heating and Cooling Setpoints which are used only in Hood On operation. Dehumidiﬁ cation would then be initiated by an Outdoor Dewpoint Setpoint.

When the Hood On Force Mode is removed, the unit will revert to CAV operation with the Outdoor Damper returning to its minimum position (unless economizer operation is enabled) and with mode control initiated by the Space Temperature and Humidity Sensors.

Space Temperature Control of High Percentage Outside Air Units

This option allows for Space Temperature control of 100% Outside Air MUA Units or units with a high percentage of Outdoor Air (normally 50% or greater). For this application you would conﬁ gure “Space Temperature w/High OA %” for the Controlling Sensor option. The intent of this sequence is to allow Space Temperature control of the unit while preventing the dumping of hot or cold outside air into the space during the Space Vent Mode of operation.

Once the Space Temperature is satisﬁ ed, before switching to Vent Mode, the controller compares the Outside Air Temperature to the Hood On HVAC Setpoints (Hood On MUA Setpoints) to determine if a continued demand for heating or cooling is required to prevent dumping. If there is no demand, the VCB-X Controller switches to Vent Mode. If the Outside Air Temperature is greater than the Hood On HVAC Cooling Setpoint or less than the Hood On HVAC Heating Setpoint, plus the Occupied Deadband, the VCB-X Controller will continue mechanical cooling or heating operation and stage it as necessary to maintain the Vent Mode Supply Air Setpoint (Preset to halfway between the Mode Enable Setpoints).

During this Vent Mode Tempering operation, indoor humidity (space or return air) will continue to control the dehumidiﬁ cation operation. So, if dehumidiﬁ cation is conﬁ gured and the humidity is above setpoint, the unit will be in Vent Mode Dehumidiﬁ cation (see the Dehumidiﬁ cation Mode section for more details). Reheat will be controlled to the calculated Vent Mode Supply Air Setpoint described earlier.

A call for Heating or Cooling from the Space Sensor will cancel the Outdoor Air Tempering operation.

NOTE: All Minimum Run times must be satisﬁ ed before

mechanical cooling or heating is de-energized.

VAV Operation with Outdoor Air Temperature Control (Alternative Operation to VAV with Supply Air Tempering)

On a VAV unit that may need daytime heating to be able to maintain the Cooling Supply Air Setpoint, previous controllers used a Supply Air Tempering sequence with the Supply Air Temperature Sensor configured as the Controlling Sensor. The VCB-X Controller accomplishes the same result using the Outdoor Air (OA) Temperature Sensor as the Controlling Sensor.

First conﬁ gure for OA Temperature Control. Then conﬁ gure OA Cooling and OA Heating Mode Enable Setpoints as well as Cooling and Heating Supply Air Setpoints. Conﬁ gured this way, whenever the OA temperature rises above the OA Cooling Setpoint, the unit will be in Cooling Mode, controlling to the Cooling Supply Air Setpoint. Whenever the OA Temperature falls below the OA Heating Setpoint, the unit would be in the Heating Mode, controlling to the Heating Supply Air Setpoint. The Cooling and Heating Supply Air Setpoints can be set to the same values (e.g. 55  F). The OA Heating Setpoint should be calculated as the OA temperature that, when mixed with the Return Air with the OA Damper (Economizer) at its Minimum Position, will require Heating in order to achieve the Supply Air Setpoint.

Finally, conﬁ gure the VCB-X for Duct Static Pressure Control and for Morning Warm-Up control (Morning Warm-Up is now an available option for any application except 100% Outdoor Air units).

Revised 2/14/14

This conﬁ guration will still allow the Economizer to be used for free cooling when the unit is in the Cooling Mode.

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Heat Pump Operation

Air to Air Heat Pump Operation

Cooling Mode will operate in the same manner as described in the Cooling section.

A reversing valve relay output can be conﬁ gured to activate with the ﬁ rst compressor stage in the Heating Mode or the Cooling Mode of operation.

In the Heating Mode, Compressor Heat, Auxiliary Heat, and Emergency Heat can be used to achieve the Active Supply Air Heating Setpoint. Auxiliary Heat can be either a modulating or staged form of heat, or it can be a modulating form of heat followed by staged heat.

When Auxiliary Heat comes on in conjunction with a digital compressor heat stage, the digital compressor will be locked at 100% until the Supply Air Temperature (SAT) rises above the SAT Heating Setpoint plus the Heat Staging Window. At that point, the Auxiliary Heat will stage off (after a stage down delay) and the digital compressor heat will be allowed to modulate.

When the Outdoor Air Temperature (OAT) is below the Heating Lockout but above the OAT Compressor Heating Lockout, Compressor Heat will be used and can be supplemented by Auxiliary Heat.

Heat Pump Standard Defrost Operation

If using the VCB-X Controller with an installed Defrost Coil Temperature Switch, a Defrost Cycle is available.

If the compressor(s) are operating in the Heating Mode and the Defrost Coil Temperature Switch closes, the unit will enter the Defrost Mode, provided the user-adjustable Defrost Interval Timer has elapsed since the last Defrost Cycle.

In the Defrost Cycle, the reversing valve signal is switched to the opposite operation, and the compressors are brought to maximum capacity. Auxiliary Heat will be used to attempt to maintain the Heating SAT Setpoint.

The unit will leave the Defrost Mode after 10 minutes have elapsed or the Defrost Coil Temperature Switch opens.

If the unit leaves the compressor heating mode, the Defrost Interval will restart once the unit re-enters the compressor heating mode.

Heat Pump Adaptive Defrost Operation

When the OAT is below the OAT Compressor Heating Lockout, Compressor Heat is locked out. Auxiliary Heat will then be the primary heat and can be supplemented with stage(s) of Emergency Heat (if available). Emergency heat is only available when the OAT is below the OAT Compressor Lockout.

There is no Dehumidiﬁ cation during the Heat Mode of a Heat Pump unit.

NOTE: Any digital compressor stage in a Heat Pump unit must

be conﬁ gured as a “Digital Compressor”. The VCB-X will know it will operate as a heat pump compressor by the unit being conﬁ gured as having a Reversing Valve. Any ﬁ xed Heat Pump compressor stage must be conﬁ gured as a “Heat Pump Compressor” rather than a “Cooling Stage.”

The Adaptive Defrost operation adjusts the time interval (Adaptive Defrost Timer) in between Defrost Mode cycles.

As stated above, the unit will leave the Defrost Mode after 10 minutes have elapsed or the Defrost Coil Temperature Switch opens. If the Defrost Cycle is terminated because the 10 minute timer runs out, this could be an indicator that the unit may need more defrost time. To address this issue, the Adaptive Defrost Timer value will be subtracted from the original Defrost Interval.

If the Defrost Cycle is terminated between the 8th and 9th minute, the Defrost Interval will not be changed.

If the Defrost Cycle is terminated before the 8th minute, this could be an indicator that the unit may need less defrost time. To address this issue, the Adaptive Defrost Timer value will be inversely proportionally added to the original Defrost Interval as the termination time moves from 8 minutes to 0 minutes.

Adaptive Defrost can be disabled by setting the Adaptive Defrost Timer Setpoint to 0.

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Water Source Heat Pump Operation

Zone

Water Source Heat Pump Operation

Cooling Mode will operate in the same manner as described in the Cooling section.

A reversing valve relay output can be conﬁ gured to activate with the ﬁ rst compressor stage in the Heating Mode or the Cooling Mode of operation.

In the Heating Mode, Auxiliary Heat can be used with Compressor Heat to achieve the Active Supply Air Heating Setpoint. Auxiliary Heat can be either modulating or staged forms of heat, or it can be a modulating form of heat followed by staged heat.

Compressor lockouts are not used on a Water Source Heat Pump Unit. There is no Dehumidiﬁ cation during Heat Mode of a Water Source Heat Pump Unit. There is no Defrost Mode on a Water Source Heat Pump Unit.

NOTE: Any digital compressor stage in a Heat Pump unit must

The unit can be conﬁ gured for the percentage of glycol it has. The options are 0%-40% in 5% increments.

Revised 4/9/12

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Water Source Heat Pump Safety Monitoring

Safety Monitoring

Proof of Flow

1. If there is a call for a compressor and there is no Proof of Flow (POF) Input enable:

• Compressors will not be enabled.

• The VCB-X will wait up to 3 minutes to activate

the POF Alarm and the POF LEDs which will blink the code-indicating failure. If POF failure still exists, compressors will remain disabled.

2. If compressors(s) are running and the POF contact opens for 2 seconds during Heat Pump Heating:

• Compressors will be disabled.

• POF Alarm will activate and POF LEDs will

blink the code-indicating failure.

• If after a 2 minute delay POF is established,

compressors will be enabled.

3. If compressors(s) are running and the POF contact opens for 2 seconds during Cooling:

• POF input will be ignored.

• No alarm will be generated.

Low Suction Pressure Detection

3. If multiple compressors are enabled to come back on simultaneously, a 2 second start-up delay is implemented to deter a high power surge.

Unsafe Suction Pressure Detection

If the Suction Pressure falls below the Unsafe Suction Pressure Setpoint for 5 seconds:

• Compressors will be locked out immediately.

• Power will need to be cycled to restart the unit.

Low Leaving Water Temperature

NOTE: This safety is only monitored in the Heat Mode.

1a. If the Leaving Water Temperature falls below the Low Leaving Water Temperature Setpoint with 2 compressors on:

• The 2nd compressor will stage off.

• A Low Leaving Water Temperature Alarm will

activate and LEDs will blink the code-indicating failure.

• Compressor 2 will be locked out until the Leaving

Water Temperature is 6˚ above setpoint.

1. If the Suction Pressure falls below the Low Suction Temperature Setpoint for longer than 1 minute:

• Compressors will be disabled.

• Low Suction Pressure Alarm will activate and

the Low Suction Pressure LEDs will blink the code-indicating failure.

• If after a 10 minute delay the Suction Pressure

has risen above the Low Suction Pressure Setpoint, compressors will be enabled to run.

2. If the Suction Pressure falls below this setpoint for 1 minute a second time within a two hour window:

• Compressors will be locked out.

• An alarm LED will indicate Compressor Lockout.

• Power will need to be cycled or a change of Mode

(i.e. Cool to Heat) will need to occur for compressors to be enabled again.

VCB-X Controller Field Technical Guide

1b. If the Leaving Water Temperature remains below setpoint after a 1 minute stage off delay:

• The 1st compressor will stage off.

• A Low Leaving Water Temperature Alarm will

activate and LEDs will blink the code-indicating failure.

• Compressor 1 and 2 will be locked out until the

Leaving Water Temperature is 12˚ above setpoint.

2. If the Leaving Water Temperature falls below the Low Leaving Water Setpoint with only 1 compressor on:

• The 1st compressor will stage off.

• A Low Leaving Water Temperature Alarm will

activate and LEDs will blink the code-indicating failure.

• Compressor 1 will be locked out until the Leaving

Water Temperature is 12˚ above setpoint.

SEQUENCE OF OPERATIONS

Head Pressure Control and Alarms

Zone

Head Pressure Control

The VCB-X EM1 Expansion Module can monitor a Head Pressure Transducer and control a Condenser Fan or a Condenser Water Valve to maintain a Head Pressure Setpoint. The VCB-X Controller can be conﬁ gured for an Air Cooled Condenser (default) or for a Water Cooled Condenser.

A Condenser Relay is commanded on when the ﬁ rst compressor is enabled (except if the unit is in Heat Pump Defrost Mode). On an Air Cooled Unit, the Condenser Fan will be controlled with 0-10 VDC output signal or a PWM output signal. Both outputs operate simultaneously. On a Water Cooled Unit, the Condenser Water Valve will be controlled with a 2-10 VDC output signal.

When the Condenser Signal ﬁ rst activates, it maintains at 50% for 30 seconds on an Air Cooled Unit and at 75% for 3 minutes on a Water Cooled Unit.

In the Cooling Mode, the Condenser Signal will modulate to maintain the Cooling Head Pressure Setpoint. For an Air Cooled Unit, the signal can modulate between 15% and 100%. For a Water Cooled Unit, the signal can modulate between 25% and 100%. If the Head Pressure exceeds 550 PSIG, the condenser control signal will immediately go to 100% and a High Head Pressure Alarm will be generated. The alarm will be deactivated when the Head Pressure drops below 540 PSIG.

In the Dehumidiﬁ cation Mode, the Condenser Output Signal controls to the Reheat Head Pressure Setpoint. High Head Pressure conditions produce the same effects as in the Cooling Mode.

In Heat Pump Heating Mode, the Condenser Output Signal will be 100%. In the Defrost Mode the signal will be 0%. There is no Defrost required in a Water Cooled Unit.

Outdoor Air Lockouts

The compressors are disabled during Cooling Mode when the Outdoor Air Temperature is below the Compressor Cooling Lockout Setpoint.

Mechanical heating is disabled when the Outdoor Air Temperature is above the Heating Lockout Setpoint.

For Air to Air Heat Pumps, the compressors are disabled during Heating Mode when the Outdoor Air Temperature is below the Compressor Heating Lockout Setpoint.

System Broadcasts

An Outdoor Air Temperature Sensor reading is broadcast from any one VCB-X Controller to any controller that does not have an Outdoor Air Temperature Sensor.

Alarm Detection and Reporting

The VCB-X Controller continuously performs self diagnostics during normal operation to determine if any operating failures have occurred.

These failures (alarms) can be reported to a Touch Screen System Manager, a Hand Held Modular Service Tool, or to a computer running Prism 2 software.

Diagnostic LEDs on the VCB-X controller will generate “blink codes” for certain alarm conditions.

The following are the available alarm designations for the VCB-X Controller:

If no Head Pressure Sensor is detected, the Condenser the Condenser Output Signal will be maintained at 100%.

Temperature Protection

Temperature Protection is activated when the Supply Air Temperature (SAT) rises above the High Cutoff Temperature (immediate) or drops below the Low Cutoff Temperature (for 10 minutes). Both cutoff setpoints are user-adjustable. This mode shuts off the unit (with a 3 minute fan off delay) until the mode is cancelled.

This mode is cancelled when the SAT drops 5 degrees below the High Cutoff Temperature Setpoint or rises 5 degrees above the Low Temp Cutoff Temperature Setpoint or when the unit changes back into Occupied Operation.

Revised 2/14/14

Bad SAT Sensor Bad OAT Sensor Bad Space Sensor Missing Main Exp Board Missing Co2 Sensor Bad Compressor Discharge Sensor Missing Suction Pressure Sensor Missing Outdoor Airﬂ ow Sensor Missing Exhaust Airﬂ ow Sensor Missing Supply Air Airﬂ ow Sensor Missing Return Air Airﬂ ow Sensor Missing MHGRV-X Board Missing MODGAS-X Board Missing 12RLY Board Mech Cooling Failure Mech Heating Failure Fan Proving Alarm Dirty Filter Alarm Emergency Shutdown

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Alarms

High Supply Air Temperature Cutoff Low Supply Air Temperature Cutoff High Control Temp Low Control Temp Digital Compressor Cutoff Digital Compressor Lockout High Head Pressure WSHP Proof of Flow Failure Low Suction Pressure Unsafe Suction Pressure WSHP Low Water Temperature

Sensor Failure Alarms

Supply Air Temperature Sensor Failure Alarm

The Supply Air Temperature Sensor Failure Alarm is generated when the controller detects an open or short circuit on the Supply Air Temperature Sensor input. Once the alarm is generated, the unit will be completely shut down. If a sensor is properly detected after the unit has alarmed, the alarm will be cleared and the unit will restart operations.

Space Temperature Sensor Failure Alarm

If the Space Sensor is conﬁ gured as the Controlling Sensor (Mode Enable Sensor) or as the Reset Sensor, and if the controller detects an open or short circuit on the Space Sensor input, then a Space Temperature Sensor Failure Alarm is generated. If the Space Sensor is conﬁ gured as the Controlling Sensor and the Failure Alarm is generated, the unit will shut down. If the Space Sensor is only conﬁ gured as a Reset Sensor and the Failure Alarm is generated, the Space Temperature will default to a value half way between the Heating and Cooling Mode Enable Setpoints, and the unit will continue to run.

Outdoor Air Temperature Sensor Failure Alarm

The Outdoor Air Temperature Sensor Failure Alarm is generated when the controller detects an open or short circuit on the Outdoor Air Temperature Sensor input. When this occurs, the Outdoor Air reading will be artiﬁ cially set to the half point between the Cooling and Heating Lockout Setpoints. This will allow the cooling and the heating to continue operating.

CO2 Sensor Failure Alarm

This alarm is generated if the controller is conﬁ gured to have a

sensor, but does not detect it. IAQ Mode is disabled when this

occurs. If a sensor is properly detected after the unit has alarmed, the alarm will be cleared and the unit will be return to CO2 control

Suction Pressure Sensor Failure Alarm

If the controller detects the Suction Pressure Sensor is missing, this alarm is generated and the unit will shut down. If the sensor is properly detected after the unit has alarmed, the alarm will be cleared and the unit will restart.

Airﬂ ow Alarms

Outdoor Airﬂ ow Sensor Alarm Supply Airﬂ ow Sensor Alarm Return Airﬂ ow Sensor Alarm Exhaust Airﬂ ow Sensor Alarm

If the controller is conﬁ gured to have any of the above air ﬂ ow sensors, but the controller does not detect that the sensor is connected, then the applicable alarm will occur. If the sensor is properly detected after the unit has alarmed, the alarm will be cleared.

Missing Expansion Module Alarm

Main Expansion Missing Reheat Board Missing ModGas Board Missing 12 Relay Board Missing

If the controller is conﬁ gured to have any of the above Expansion Boards (Modules), but the controller does not detect that board, then the applicable alarm will occur. If the board is properly detected after the unit has alarmed, the alarm will be cleared.

Mechanical Failure Alarms

Mechanical Cooling Failure

The Mechanical Cooling Failure Alarm is generated if the Supply Air Temperature fails to drop 5 degrees (within a user-adjustable time period) from the temperature the supply air was at when the cooling was activated. The alarm will be cleared when the Supply Air Temperature drops the 5 degrees and sets the failure timer back to zero. This alarm does not apply for Modulating Cooling.

Mechanical Heating Failure

The Mechanical Heating Failure Alarm is generated if the Supply Air Temperature fails to rise 5 degrees (within a user-adjustable time period) from the temperature the supply air was at when the heating was activated. The alarm will be cleared when the Supply Air Temperature rises the 5 degrees and sets the failure timer back to zero. This alarm does not apply for Modulating Heating.

Compressor Discharge Sensor Failure Alarm

This alarm is generated if the unit is conﬁ gured to have a digital scroll compressor, but the Digital Compressor Discharge Temperature Sensor is not detected or if shorted.

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Alarms

Zone

Proof of Flow Interlock Alarm

A Proof of Flow switch (by others) provides a 24 VAC wet contact closure when the Supply Fan is operating. If this contact opens while the fan is being called to run, all heating and cooling is disabled, and a Fan Proving Alarm is generated. Fan Proving needs to be conﬁ gured for this alarm to occur.

Dirty Filter Alarm

A differential pressure switch (by others) is used to provide a 24 VAC wet contact closure to indicate a dirty ﬁ lter status. A Dirty Filter Alarm is then generated. Dirty Filter needs to be conﬁ gured for this alarm to occur.

Emergency Shutdown Alarm

A 24 VAC wet contact input is available to be used when a N.C. Smoke Detector, Firestat, or other shutdown condition occurs. If this contact opens, it will initiate shutdown of the VCB-X and will generate an alarm condition. This contact closure does not produce an instantaneous shutdown. Emergency Shutdown needs to be conﬁ gured for this alarm to occur.

For instantaneous shutdown, the device initiating the open condition on this contact should also be wired to cut the 24 V common to the VCB-X relay outputs.

Failure Mode Alarms

Digital Compressor Cutoff Alarm

If the digital compressor discharge temperature rises above 268˚F (131.11˚C) or the sensor is shorted (which will read a temperature of 300˚F (148.88˚C)), this alarm will be generated.

The alarm is removed when the compressor discharge temperature drops below 250˚F (121.11˚C). Once the compressor is shut off, it remains off for 30 minutes.

Digital Compressor Lockout Alarm

If a total of 5 Digital Compressor High Temperature Cutoffs have occurred within four hours, the VCB-X Controller will lock out the digital compressor and this alarm will be generated. The ALERT LED will continually ﬂ ash 6 times to signal the lockout. The lockout can only be reset by cycling the 24VAC power off and on to the controller.

If the unit runs for 60 minutes without a digital compressor discharge temperature alarm, then the counter is reset to zero.

High Head Pressure Alarm

If the Head Pressure exceeds an acceptable limit, this alarm will be generated. The alarm will be cleared if the Head Pressure falls back within acceptable limits.

WSHP Proof of Flow Alarm

On a Water Source Heat Pump unit, if water ﬂ ow is not proven within a certain time limit, this alarm will be generated. This alarm condition will disable the compressor(s) or prevent activation of compressor(s).

High and Low Supply Temp Alarm

These alarms are activated when the Supply Air Temperature (SAT) rises above the High Cutoff Temperature Setpoint (immediate) or drops below the Low Cutoff Temperature Setpoint (for 10 minutes). Both cutoff setpoints are user-adjustable. This mode shuts off the unit (with a 3 minute fan off delay) until the mode is cancelled.

This mode is cancelled when the SAT drops 5 degrees below the High Cutoff Temperature Setpoint or rises 5 degrees above the Low Temp Cutoff Temperature Setpoint, or when the unit changes back into Occupied Operation.

High and Low Control Temp Failure

When the Controlling Sensor Temperature rises above the Cooling Mode Enable Setpoint plus the Control Mode High Alarm Offset setpoint, the controller will generate a High Control Temp Failure Alarm.

When the Controlling Sensor Temperature drops below the Heating Mode Enable Setpoint minus the Control Mode Low Alarm Offset setpoint, the controller will generate a Low Control Temp Failure Alarm.

Both offset setpoints are user-adjustable.

Low Suction Pressure Alarm

On a Water Source Heat Pump unit, if the Suction Pressure falls below the Low Suction Pressure Setpoint, this alarm will be generated. This alarm condition will disable the compressor(s) or prevent activation of compressor(s).

Unsafe Suction Pressure Alarm

On a Water Source Heat Pump unit, if the Suction Pressure falls below the Unsafe Suction Pressure Setpoint, this alarm will be generated. This alarm condition will disable the compressor(s) or prevent activation of compressor(s).

WSHP Low Leaving Water Temperature Alarm

On a Water Source Heat Pump unit, if the Suction Pressure falls below the Low Leaving Water Temperature Setpoint while in the Heating Mode, this alarm will be generated. This alarm condition will disable the compressor(s) or prevent activation of compressor(s).

Title 24 Economizer Alarms

Economizer Temperature Sensor Failure

Outside Air or Supply Air Temperature Sensor is shorted or missing.

VCB-X Controller Field Technical Guide

SEQUENCE OF OPERATIONS

Trend Logging

Economizer Not Economizing When it Should

Economizer is enabled but not following the desired Economizer position commanded.

Economizer Is Economizing When It Should Not

Economizer is not enabled but the feedback signal indicates a position more open than the minimum.

Economizer Damper Not Modulating

Economizer is enabled but not within 10% of desired position within 150 seconds.

Economizer Excess Outdoor Air Filter

Economizer feedback is lost or Economizer is not following commanded position.

VAV/Zone Controller Alarms

Space Sensor Failure Alarm

If the controller detects an open or short on the Space Sensor input, this alarm will be generated.

Relay Outputs

There are 5 relay outputs that are conﬁ gurable for the VCB-X Controller (Relay #1 is reserved for the Supply Fan and is not

conﬁ gurable). See Table 4 for descriptions of the conﬁ guration

options.

Trend Logging

The VCB-X Controller continuously maintains an Internal Trend Log in memory which records a ﬁ xed set of values at a user-deﬁ ned interval.

120 log positions (timed retrievals) are available on the controller. Once these positions are full, the controller begins overwriting the oldest data.

Values can be retrieved using the Prism 2 graphical front-end software program.

With Prism 2 running continuously, values can be saved to the computer hard drive at regular intervals to keep from losing data.

The following are the ﬁ xed items that can be logged:

CFM Sensor Failure Alarm

If the Air Flow Constant (K Factor) is set to any value other than zero, and the controller does not detect the Airﬂ ow Sensor, this alarm will be generated.

Damper Opening Alarm

After initial calibration, if the damper is called to be fully open and cannot reach that position within approximately 2 minutes, this alarm will be generated.

Damper Closing Alarm

After initial calibration, if the damper is called to be fully closed and cannot reach that position within approximately 2 minutes, this alarm will be generated.

High Space Temp Alarm

If the zone temperature is above the Cooling Setpoint by the Hi Zone Alarm Offset (user adj.) for the Zone Alarm Delay Period (user adj.), this alarm will be generated.

Low Space Temp Alarm

If the zone temperature is below the Heating Setpoint by the Lo Zone Alarm Offset (user adj.) for the Zone Alarm Delay Period (user adj.), this alarm will be generated.

Damper Feedback Failure Alarm

If the controller fails to detect the actuator feedback signal, this alarm will be generated.

Date Time Mode of Op (Occupied / Override / Unoccupied) HVAC Mode Space Temperature Supply Air Temperature Supply Air Setpoint Outdoor Air Temperature Digital Compressor Discharge Temperature Active Cooling Mode Setpoint Active Heating Mode Setpoint IAQ Mode Active (0-No, 1=Yes) Outdoor CFM Supply CFM Return CFM Exhaust CFM Suction PSI Main Fan Speed VFD Signal Economizer Signal Percentage Modulating Cool Signal - (Digital Compressor) Modulating Heat Signal Binary Inputs (1=Emergency, 2=Proof of Flow, 4=Dirty Filter, 8=Defrost)

Main Relay Status Relay #2 Status (Labeled as conﬁ gured) Relay #3 Status (Labeled as conﬁ gured) Relay #4 Status (Labeled as conﬁ gured) Relay #5 Status (Labeled as conﬁ gured) Relay #6 Status (Labeled as conﬁ gured)

VCB-X Controller Field Technical Guide

Revised: 8/6/14

TROUBLESHOOTING

LED Diagnostics

Zone

Using VCB-X LEDs To Verify Operation

The VCB-X Controller is equipped with LEDs that can be used to verify operation and perform troubleshooting. There are LEDs for communication, operation modes, and diagnostic codes. The VCB-X Controller has 23 LEDs—11 used for operation & status, and 6 used for relays, 2 used for Digital Compressor operation, and

4 used for binary inputs. See Figure 42 for the LED locations. The

LEDs associated with these inputs and outputs allow you to see what is active without using a voltmeter. The LEDs and their uses are as follows:

Operation LEDs - Factory Troubleshooting

POWER - This green LED will light up to indicate that 24 VAC

power has been applied to the controller.

APP HB - This green LED will light up and blink continuously to

indicate the application software is working properly.

OS HB - This green LED will light up and blink continuously to

indicate the operating system is working properly.

WDOG - This green LED will light up and stay lit to indicate the

operating system is working properly.

Compressor LEDs

ALERT - This red LED will light up and blink a code to indicate

why the digital scroll compressor is not working properly.

UNLOAD - This green LED will light up and blink continuously

when the digital scroll compressor is in cooling mode.

Relay LEDs

RLY1 - This green LED will light up when the Supply Fan is enabled

and will stay lit as long as the Supply Fan is active.

RLY2 - This green LED will light up when Relay 2 is enabled and

will stay lit as long as Relay 2 is active.

RLY3 - This green LED will light up when Relay 3 is enabled and

will stay lit as long as Relay 3 is active.

RLY4 - This green LED will light up when Relay 4 is enabled and

will stay lit as long as Relay 4 is active.

RLY5 - This green LED will light up when Relay 5 is enabled and

will stay lit as long as Relay 5 is active.

RLY6 - This green LED will light up when Relay 6 is enabled and

will stay lit as long as Relay 6 is active.

Diagnostic LEDs

ALARM - This red LED is a diagnostic blink code LED. It will light

up and stay lit when there is an alarm present. The type of alarm will display on the LCD display.

STA TUS 1 - This red LED is a diagnostic blink code LED. It will light

up and blink out diagnostic codes. STATUS 1 LED also represents

the tens column in the address blink code. See Table 6 for Status

Blink Code code descriptions. The blink code descriptions are also located on the Controller’s front cover.

STA TUS 2 - This red LED is a diagnostic blink code LED. It will light

up and blink out diagnostic codes. STATUS 2 LED also represents

the ones column in the address blink code. See Table 6 for Status

Blink Code code descriptions. The blink code descriptions are also located on the Controller’s front cover.

Communication LEDs

EBUS - This yellow LED will blink to signal E-BUS communications. LOOP COMM - This yellow LED will light up and blink continuously

to indicate the VCB-X Controller is communicating.

BACNET - This yellow LED will light up and blink continuously

to indicate BACnet communications.

Binary Input LEDs

BIN1 - This green LED will light up when the Emergency Shutdown

contact is closed.

BIN2 - This green LED will light up when the Proof of Flow switch

is closed.

BIN3 - This green LED will light up when the Dirty Filter switch

is closed.

BIN4 - This green LED will light up when the Defrost Coil

Temperature switch is closed.

VCB-X EM1 Expansion Module LEDs

The VCB-X EM1 Expansion Module is equipped with 4 LEDs that

can be used as very powerful troubleshooting tools. See Figure 42

for LED locations. The LEDs and their uses are as follows:

PWR - This LED will light up to indicate that 24 VAC power has

been applied to the controller.

ALARM - If the module does not receive communications for more

than 1 minute, this LED will light up, the relays will turn off, and the Analog Outputs will go to 0 VDC.

STAT - If the software is running, this LED should blink at a rate

of 1 blink per second.

COMM - Every time the module receives a valid E-BUS request

from the VCB-X Controller, this LED will blink on and then off, signifying that it received a valid request and responded.

Revised: 2/14/14

VCB-X Controller Field Technical Guide

TROUBLESHOOTING

LED Diagnostics

LOOP COMM LED

BINARY INPUT LEDs

BACNET LED



OPERATING SYSTEM HB LED

ALARM LED

ALARM

RS-485 COMM LOOP. WIRE

“R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”

VCB-X CONTROLLER

Orion No.: OE335-26B-VCBX

ANALOG INPUTS

AI1 = SPC (SPACE TEMP SENSOR) AI2

= SAT(SUPPLY AIR TEMP SENSOR)

AI3

= OAT(OUTDOOR AIR TEMP SENSOR)

AI4

= DCT (DIGITALCOMP DISCH TEMP SENSOR)

AI5

= SPACETEMPERATURE SLIDE OFFSET

BINARY INPUTS

BI1

= EMERGENCY SHUTDOWN

BI2

= PROOF OF FLOW

BI3

= DIRTY FILTER

BI4

= COIL TEMP SWITCH

G OUTPUTS

ANALO

AO1

= FAN VFD

AO2

= ECONOMIZER

AO3

= MOD HEATING

TRIAC OUTPUT

TR1

= DIGITALCOMP UNLOADER (24 VAC & UNLOAD

TERMINALS)

WattMaster Label

#SW000061

Rev.: 1A

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

GND

+24 VAC

VCB-X

CONTROLLER

CANCEL

www.aaon.com

AAON : V28940

AAON Coil: J00142

E-BUS

EXPANSION

ENTER

DOWN

www.orioncontrols.com

RELAYCONTACT RATING IS 1AMP MAX @ 24 VAC

FAN

RELAY2

RELAY3

RELAY4

RELAY5

RELAY6

RELAY COMMON

E-BUS

EXPANSION

MADE IN USA

ALERT LED

UNLOAD LED

STATUS 1

STATUS 1 STATUS 2

STATUS 2

LEDs

E-BUS

LED

POWER LED



RELAY LEDs

STATIC PRESSURE

TB1

GND

TEMPSENSOR INPUTS

TB2

+5V

SIG1

GND

SIG2

GND

PRESSURE SENSOR INPUTS

TB7

BIN1

BIN2

BIN3

BINARYINPUTS

OFF

1 2

ADDRESS

Figure 42: VCB-X Controller & VCB-X EM1 Expansion Module LED Locations

VCB-X Controller Field Technical Guide

R53

R49

R48

R46

R45

5621

R24

R29

R31

R35

R57

1001

10uF

C24

YS102482 REV1

D21D20D19D17

3650

R56 R54

1001

1002

R61

1002

AOUT1

AOUT2

AOUT3

AOUT4

OPTIONS

5621

TB3

PWR

D10

ALARM

D11

STAT

D13

COMM

TB6

GND

TB9

PWM-

PWM+

SERIAL # 1 2

C26

.01uF

PWR LED ALARM LED STAT LED COMM LED

Revised: 2/14/14

R58

4992

1002

10uF

1002

R10

10uF

D24

1002

R15

1002

R16

10uF

D25

1002

R18

1002

R19

10uF

D26

VREF

1004

R22

1002

R21

10uF

C8 D8

1004

1002

10uF

D12

300

D27

D15

300

D28

D18

D29

300

1002

TROUBLESHOOTING

LED Diagnostics

Zone

Diagnostic LED Operation

POWER LED Operation

When the VCB-X Controller is ﬁ rst powered up, the POWER LED should light up and stay on continuously. If it does not light up, check to be sure that you have 24 VAC connected to the controller, that the wiring connections are tight, and that they are wired for the correct polarity. The 24 VAC power must be connected so that all ground wires remain common. If after making all these checks, the POWER LED does not light up, please contact WattMaster Controls Technical Support for assistance.

Diagnostic LED Operation

When power is ﬁ rst applied, the STATUS 1 and STATUS 2 LEDs will be off for 1 second. At this time, both LEDs will blink to indicate the setting of the address switch and then will extinguish for 5 seconds. Verify that the address switch setting is correct by counting the number of blinks.

If the address switch is not correct, ﬁ rst remove the communication loop terminal plug from the controller and then from the power

terminal plug. Set the address dip switches correctly. See Figure 41 for correct address switch setting instructions. After you are

sure the address switch setting is correct, ﬁ rst reconnect the power connection and then reconnect the communication loop connection to the controller.

NOTE: You must always cycle power to the Controller being

addressed after changing address switch settings in order for the changes to take effect.

Reapply power to the controller and observe the blink code to verify the address is set correctly. If the STATUS 1 and STATUS 2 LEDs now blink the correct address, your controller is addressed correctly. If they don’t light up at all, the controller is not operating correctly and could be defective. Once the controller is done blinking the address, the LEDs will blink a code every 10 seconds to indicate controller status. If all of these tests are made and the controller still doesn’t operate, please contact WattMaster Controls Technical Support at 866-918-1100.

The Blink Code Descriptions in Table 6 cover multiple alarm

conditions. You will need to use one of the Orion Interface Tools to determine the speciﬁ c alarm condition. See the Alarm descriptions on pages 66 through 68 for further details.

STATUS 1

Blink Code Description

NORMAL OPERATION 0 1 SUPPLY AIR SENSOR FAILURE 1 2 OUTDOOR AIR SENSOR FAILURE 2 2

SPACE SENSOR FAILURE 3 2 MISSING EXPANSION MODULE* 4 2

CO2 SENSOR FAILURE 6 2 AIRFLOW SENSOR FAILURE* 7 2 MECHANICAL COOLING

FAILURE MECHANICAL HEATING FAILURE 2 3 FAN PROVING FAILURE 3 3 DIRTY FILTER ALARM 4 3 EMERGENCY SHUTDOWN 5 3 ECONOMIZER TITLE 24 ALARM 6 3 LOW SUPPLY TEMP ALARM 1 4 HIGH SUPPLY TEMP ALARM 2 4 CONTROL TEMP HI ALARM 3 4 CONTROL TEMP LOW ALARM 4 4

HIGH HEAD PRESSURE 5 4 WATER PROOF FAILURE 6 4 SUCTION PRESSURE ALARM* 7 4 LOW LEAVING WATER TEMP 8 4 PUSH BUTTON OVERRIDE 1 5

OUTPUT FORCE ACTIVE 0 6 * MISSING EXP. MODULE – INCLUDES MULTIPLE MODULES

AIRFLOW SENSOR FAILURE – INCLUDES MULTIPLE AIRFLOW SENSORS

SUCTION PRESSURE ALARM – INCLUDES SUCTION PRESSURE SENSOR FAILURE ALARM, LOW SUCTION PRESSURE ALARM, AND UNSAFE SUCTION PRESSURE ALARM

LED

Blinks

STATUS 2

LED

Blinks

Table 6: Diagnostic LED Blink Code Interpretation

ALERT

Blink Code Description

LED

Blinks

Digital Compressor LED Operation

UNLOAD LED

Any time there is a signal going to the Digital Compressor Unloader Solenoid Valve the Unload LED will be on.

ALERT LED

The ALERT LED will blink the alarm codes for the digital

compressor. See Table 7.

Revised 6/17/14

NORMAL OPERATION 0 MISSING DISCHARGE SENSOR 1 HIGH TEMPERATURE CUTOFF TIMEOUT

PERIOD (30 MINUTES) HIGH DISCHARGE TEMPERATURE CUTOFF 4

COMPRESSOR LOCKED OUT 6

Table 7: ALERT LED Blink Code Interpretation

VCB-X Controller Field Technical Guide

APPENDIX A

System Conﬁ gurations

System Conﬁ guration Options

The VCB-X Controller can be used as a Stand-Alone System (one VCB-X Controller only), connected together on an Interconnected System (multiple VCB-X Controllers only) or connected together on a Network System (multiple VCB-X Controllers, VAV/Zone Controllers, or Add-On Controllers) to form a complete Controls System that can be programmed and monitored with one or more of the available Operator Interfaces.

Operator Interfaces

The Operator Interfaces are designed to provide for programming and monitoring of VCB-X Controller(s) and/or any VAV/Zone or

Add-on Controller(s) connected to your System. See Figure 43. The

available Operator Interfaces are as follows:

• Modular Service Tool SD (OE391-12)

• Modular System Manager SD (OE392-12)

• System Manager Touch Screen II (OE392-10)

• Personal Computer with Prism 2 Computer Front End Software Installed and CommLink 5

You can use any one of these interfaces or all of them on the same VCB-X Control System.

Stand-Alone System

The Stand-Alone System is used when you have a single VCB-X Controller only. Programming and status monitoring are accomplished by selecting and installing one or more of the Operator Interfaces.

See Figure 44 for a Typical Stand-Alone System Layout diagram.

Interconnected System

The Interconnected System is used when you have multiple VCB-X Controllers on your job. With this system, you simply connect the controllers together using WattMaster communications wire or 18-gauge, 2-conductor twisted pair with shield wire (Belden #82760 or equivalent). This allows for all controllers that are connected on the communications loop to be programmed and monitored from one or more of the available Operator Interfaces connected on the communications loop.

See Figur e 45 for a Typical Interconnected System Layout diagram.

Networked System

If you have 1 to 59 VCB-X Controllers that require information sharing, simply connect the controllers together using WattMaster communications wire or 18-gauge, 2-conductor twisted pair with shield wire (Belden #82760 or equivalent). The Networked Single Loop System requires that either a MiniLink PD communication interface and/or CommLink communication interface are purchased and wired into the communications loop in a similar manner to the VCB-X Controllers.

The Networked Multiple Loop system is used when you have more than 59 VCB-X Controllers and/or are using multiple VCB-X Controllers that are connected to VAV/Zone controllers. These groups of controllers are broken up into multiple “Local Loops” that connect to each other via the “Network Loop.” Each individual MiniLink PD handles its speciﬁ c local loop’s communications requirements. The CommLink communications interface handles all the communications between the individual MiniLink PDs to form the network loop. Up to 60 local loops can be connected together with this conﬁ guration. This provides the capability for over 3500 controllers to be networked together.

See Figure 46 for a Typical Networked System Layout diagram.

Modular Service

Tool SD

System Manager TS II

Figure 43: Available Operator Interfaces

VCB-X Controller Field Technical Guide

Operator

Interfaces

Personal Computer, Prism 2 Software

& CommLink

Modular System

Manager SD

Revised 9/24/13

APPENDIX A

Stand-Alone System Layout

Zone

Modular

Service Tool SD

System Manager

Touch Screen II

Operator

Interfaces

Modular System

Manager SD

Personal Computer,

CommLink,

and Prism 2 Software

Figure 44: Typical Stand-Alone System Layout

Revised 9/24/13

VCB-X Controller Field Technical Guide

APPENDIX A

Interconnected System Layout

Manager SD

Modular System

Tool SD

Modular Service

and Prism 2 Software

Personal Computer & CommLink

Touch Screen II

System Manager

VCB-X Controller Field Technical Guide

Revised 9/24/13

Figure 45: Typical Interconnected System Layout

APPENDIX A

Operator

Interface

Operator

Interfaces

Networked System Layout

Zone

Revised 9/24/13

VCB-X Controller Field Technical Guide

Figure 46: Typical Networked System Layout

APPENDIX A

Temperature Sensor Testing

Space, Outdoor Air or Return Air Temperature Sensor Testing

The following sensor voltage and resistance table is provided to aid in checking sensors that appear to be operating incorrectly. Many system operating problems can be traced to incorrect sensor wiring. Be sure all sensors are wired per the wiring diagrams in this manual.

If the sensors still do not appear to be operating or reading correctly, check voltage and/or resistance to conﬁ rm that the sensor is operating correctly per the tables. Please follow the notes and instructions that appear after the chart when checking sensors.

Temperature – Resistance – Voltage for Type

III 10 K Ohm Thermistor Sensors

Temp

(ºF)

-10 -23.33 93333 4.51

-5 -20.55 80531 4.45 0 -17.77 69822 4.37 5 -15 60552 4.29 10 -12.22 52500 4.2 15 -9.44 45902 4.1 20 -6.66 40147 4.002 25 -3.88 35165 3.891 30 -1.11 30805 3.773 35 1.66 27140 3.651 40 4.44 23874 3.522 45 7.22 21094 3.39 50 10 18655 3.252 52 11.11 17799 3.199 54 12.22 16956 3.143 56 13.33 16164 3.087 58 14.44 15385 3.029 60 15.55 14681 2.972 62 16.66 14014 2.916 64 17.77 13382 2.861 66 18.88 12758 2.802 68 20 12191 2.746 69 20.55 11906 2.717 70 21.11 11652 2.691 71 21.66 11379 2.661 72 22.22 11136 2.635 73 22.77 10878 2.605

Temp

(ºC)

Resistance

(Ohms)

Voltage @

Input (VDC)

Temperature – Resistance – Voltage for Type

III 10 K Ohm Thermistor Sensors

Temp

(ºF)

74 23.33 10625 2.576 75 23.88 10398 2.549 76 24.44 10158 2.52 77 25 10000 2.5 78 25.55 9711 2.464 80 26.66 9302 2.41 82 27.77 8893 2.354 84 28.88 8514 2.3 86 30 8153 2.246 88 31.11 7805 2.192 90 32.22 7472 2.139 95 35 6716 2.009 100 37.77 6047 1.884 105 40.55 5453 1.765 110 43.33 4923 1.65 115 46.11 4449 1.54 120 48.88 4030 1.436 125 51.66 3656 1.339 130 54.44 3317 1.246 135 57.22 3015 1.159 140 60 2743 1.077 145 62.77 2502 1.001 150 65.55 2288 0.931

Temp

(ºC)

Resistance

(Ohms)

Voltage @

Input (VDC)

Table 8, cont.: Temperature/Resistance for Type III 10K Ohm Thermistor Sensors

Thermistor Sensor Testing Instructions

Use the resistance column to check the thermistor sensor while disconnected from the controllers (not powered).

Use the voltage column to check sensors while connected to powered controllers. Read voltage with meter set on DC volts. Place the “-” (minus) lead on GND terminal and the “+” (plus) lead on the sensor input terminal being investigated.

If the voltage is above 4.88 VDC, then the sensor or wiring is “open.” If the voltage is less than 0.05 VDC, then the sensor or wiring is shorted.

Table 8: Temperature/Resistance for Type III 10K Ohm Thermistor Sensors

VCB-X Controller Field Technical Guide

Zone

APPENDIX A

Zone

Copeland® Discharge Thermistor Temperature Sensor Testing

If the sensors still do not appear to be operating or reading correctly, check voltage and/or resistance to conﬁ rm that the sensor is operating correctly per the table. Please follow the notes and instructions the appear after the chart when checking sensors.

Discharge Thermistor Temperature/

Resistance

Temp

(ºF)

-40 -40 2889.60 4.98

-31 -35 2087.22 4.97

-22 -30 1522.20 4.96

-13 -25 1121.44 4.95

-4 -20 834.72 4.94 5 -15 627.28 4.92 14 -10 475.74 4.89 23 -5 363.99 4.86 32 0 280.82 4.82 41 5 218.41 4.77 50 10 171.17 4.72 59 15 135.14 4.65 68 20 107.44 4.57 77 25 86.00 4.47 86 30 69.28 4.36 95 35 56.16 4.24 104 40 45.81 4.10 113 45 37.58 3.94 122 50 30.99 3.77 131 55 25.68 3.59 140 60 21.40 3.40 149 65 17.91 3.20 158 70 15.07 3.00 167 75 12.73 2.80 176 80 10.79 2.59 185 85 9.20 2.39

Temp

(ºC)

Resistance

(K Ohms)

Voltage @

Input (VDC)

Discharge Thermistor Temperature/

Resistance

Temp

(ºF)

194 90 7.87 2.19 203 95 6.77 2.01 212 100 5.85 1.84 221 105 5.09 1.68 230 110 4.45 1.53 239 115 3.87 1.39 248 120 3.35 1.25 257 125 2.92 1.12 266 130 2.58 1.02 275 135 2.28 0.92 284 140 2.02 0.83 293 145 1.80 0.76 302 150 1.59 0.68 311 155 1.39 0.61 320 160 1.25 0.55 329 165 1.12 0.50 338 170 1.01 0.45 347 175 0.92 0.42 356 180 0.83 0.38

Temp

(ºC)

Resistance

(K Ohms)

Voltage @

Input (VDC)

Table 9, cont.: Discharge Thermistor Temperature/ Resistance

Thermistor Sensor Testing Instructions

Use the resistance column to check the thermistor sensor while disconnected from the controllers (not powered).

If the voltage is above 4.98 VDC, then the sensor or wiring is “open.” If the voltage is less than 0.38 VDC, then the sensor or wiring is shorted.

Table 9: Discharge Thermistor Temperature/ Resistance

VCB-X Controller Field Technical Guide

APPENDIX A

OE271 & OE258-01 Pressure Sensor Testing

OE271 Pressure Sensor Testing

The table below is used to troubleshoot the OE271 Duct Static Pressure Sensors.

OE271 Duct Static Pressure Sensor

Pressure

Sensor

(“ W.C.)

0.00 0.25 2.60 2.33

0.10 0.33 2.70 2.41

0.20 0.41 2.80 2.49

0.30 0.49 2.90 2.57

0.40 0.57 3.00 2.65

0.50 0.65 3.10 2.73

0.60 0.73 3.20 2.81

0.70 0.81 3.30 2.89

0.80 0.89 3.40 2.97

0.90 0.97 3.50 3.05

1.00 1.05 3.60 3.13

1.10 1.13 3.70 3.21

1.20 1.21 3.80 3.29

1.30 1.29 3.90 3.37

1.40 1.37 4.00 3.45

1.50 1.45 4.10 3.53

1.60 1.53 4.20 3.61

1.70 1.61 4.30 3.69

1.80 1.69 4.40 3.77

1.90 1.77 4.50 3.85

2.00 1.85 4.60 3.93

2.10 1.93 4.70 4.01

2.20 2.01 4.80 4.09

2.30 2.09 4.90 4.17

2.40 2.17 5.00 4.25

2.50 2.25

Voltage

Input

(VDC)

Pressure

Sensor

(“ W.C.)

Voltage

Input

(VDC)

OE258-01 Pressure Sensor Testing

The table below is used to troubleshoot the OE258-01 Building Pressure Sensors.

OE258-01 Building Pressure Sensor

Pressure

Sensor

(“ W.C.)

-0.25 0.00 0.01 2.60

-0.24 0.10 0.02 2.70

-0.23 0.20 0.03 2.80

-0.22 0.30 0.04 2.90

-0.21 0.40 0.05 3.00

-0.20 0.50 0.06 3.10

-0.19 0.60 0.07 3.20

-0.18 0.70 0.08 3.30

-0.17 0.80 0.09 3.40

-0.16 0.90 0.10 3.50

-0.15 1.00 0.11 3.60

-0.14 1.10 0.12 3.70

-0.13 1.20 0.13 3.80

-0.12 1.30 0.14 3.90

-0.11 1.40 0.15 4.00

-0.10 1.50 0.16 4.10

-0.09 1.60 0.17 4.20

-0.08 1.70 0.18 4.30

-0.07 1.80 0.19 4.40

-0.06 1.90 0.20 4.50

-0.05 2.00 0.21 4.60

-0.04 2.10 0.22 4.70

-0.03 2.20 0.23 4.80

-0.02 2.30 0.24 4.90

-0.01 2.40 0.25 5.00

0.00 2.50

Voltage

Input

(VDC)

Pressure

Sensor

(“ W.C.)

Voltage

Input

(VDC)

Table 10: Duct Static Pressure/Voltage for OE271 Duct Static Pressure Sensors

OE271 Pressure Sensor Testing Instructions

Use the voltage column to check the Duct Static Pressure Sensor while connected to powered controllers. Read voltage with meter set on DC volts. Place the “-” (minus) lead on the GND terminal and the “+” (plus) lead on the 0-5 pin terminal on (TP) with the jumper removed. Be sure to replace the jumper after checking.

VCB-X Controller Field Technical Guide

Table 11: Building Static Pressure/Voltage for OE258-01 Building Pressure Sensors

OE258-01 Building Pressure Sensor Testing Instructions

Use the voltage column to check the Building Static Pressure Sensor while connected to a powered expansion module. Read voltage with meter set on DC volts. Place the “-” (minus) lead on terminal labeled GND and the “+” lead on terminal AIN4 on the Analog Input/Output Expansion Module.

Revised 4/9/12

Zone

APPENDIX A

Zone

OE275-01 Suction Pressure Transducer Testing

OE275-01 Suction Pressure Transducer Testing for R410A Refrigerant

The Evaporator Coil Temperature is calculated by converting the Suction Pressure to Temperature. The Suction Pressure is obtained by using the OE275-01 Suction Pressure Transducer, which is connected into the Suction Line of the Compressor.

Use the voltage column to check the Suction Pressure Transducer while connected to the VCB-X Expansion Module. The VCB-X and the VCB-X Expansion Module must be powered for this test. Read voltage with a meter set on DC volts. Place the positive lead from the meter on the PR OUT terminal located on the VCB-X Expansion Module terminal block. Place the negative lead from the meter on the ground (GND) terminal located adjacent to the PR OUT terminal on the VCB-X Expansion Module terminal block. Use a refrigerant gauge set and/or an accurate electronic thermometer to measure the temperature or suction line pressure near where the Suction Pressure Transducer is connected to the suction line. Measure the Voltage at the terminals PR OUT and GND terminals and compare it to the appropriate chart depending on the refrigerant you are using. If the temperature/voltage or pressure/voltage readings do not align closely with the chart, your Suction Pressure Transducer is probably defective and will need to be replaced.

See the OE275-01 Suction Pressure Transducer, Pressure,

Temperature, and Voltage Chart for R410A Refrigerant testing (Table

12). The charts show a temperature range from 20°F to 80°F. For

troubleshooting purposes, the DC Voltage readings are also listed with their corresponding temperatures and pressures.

OE275-01 Suction Pressure Transducer

Coil Pressure

– Temperature – Voltage Chart for R410A

Refrigerant

°F

Temperature

21.19 80.94 1.8 59.03 168.10 3.2

24.49 87.16 1.9 61.17 174.32 3.3

27.80 93.39 2.0 63.19 180.55 3.4

30.99 99.62 2.1 65.21 186.78 3.5

33.89 105.84 2.2 67.23 193.00 3.6

36.80 112.07 2.3 69.24 199.23 3.7

39.71 118.29 2.4 71.15 205.46 3.8

42.30 124.52 2.5 72.95 211.68 3.9

44.85 130.75 2.6 74.76 217.91 4.0

47.39 136.97 2.7 76.57 224.14 4.1

49.94 143.2 2.8 78.37 230.36 4.2

52.23 149.42 2.9 80.18 236.59 4.3

54.50 155.65 3.0

56.76 161.88 3.1

Pressure

PSI

Signal

DC Volts

Temperature

°F

PSI

Pressure

Signal

DC Volts

Table 12: Coil Pressure/Voltage/Temp for OE275-01 Suction Pressure Transducers - R410A Refrigerant

Revised 4/9/12

VCB-X Controller Field Technical Guide

APPENDIX A

Head Pressure Transducer Troubleshooting

If you suspect there is a problem related to head pressure transducer

measurements, reference Table 13 below.

Head Pressure Transducer Chart

Voltage Pressure Voltage Pressure

0.5 0 2.6 350

0.6 17 2.7 367

0.7 33 2.8 384

0.8 50 2.9 400

0.9 67 3.0 417

1.0 83 3.1 434

1.1 100 3.2 450

1.2 117 3.3 467

1.3 133 3.4 484

1.4 150 3.5 500

1.5 167 3.6 517

1.6 183 3.7 534

1.7 200 3.8 550

1.8 217 3.9 567

1.9 233 4.0 584

2.0 250 4.1 600

2.1 267 4.2 617

2.2 283 4.3 634

2.3 300 4.4 650

2.4 317 4.5 667

2.5 334

Table 13: Head Pressure Transducer Chart

VCB-X Controller Field Technical Guide

Revised 4/9/12

APPENDIX B - LCD SCREENS

Navigation Keys

LCD Display Screen & Navigation Keys

The LCD display screens and buttons allow you to view status and alarms, enable force modes, and make BACnet® conﬁ guration

changes. See Figure 47 and refer to Table 13 for descriptions.

Figure 47: LCD Display and Navigation Keys

NAVIGATION

KEY

DOWN

ENTER

Use the MENU key to move through screens within Main Menu categories and return to the Main Menu while at other screens.

Use this key to adjust setpoints and change conﬁ gurations.

Use the ENTER key to navigate through the Main Menu Screen categories.

KEY FUNCTION

Table 14: Navigation Key Functions

Revised: 4/24/13

VCB-X Controller Field Technical Guide

APPENDIX B - LCD SCREENS

Main Screens Map and Settings Screens

Main Screens Map

Refer to the following map when navigating through the LCD Main Screens. The ﬁ rst screen is an initialization screen. To scroll through the rest of the screens, press the <MENU> button.

VCBX

VER X.XX

Press to go to Output Override Screens.

Output

Override

Press to scroll through the Output Override Screens.

Press to go to the Alarm Screens.

Settings Screens

Refer to the following map when navigating through the Settings Screens. From the Settings Screen, press <ENTER> to scroll through the screens.

Settings

MAC Addr

BACnet® - CURRENT MAC ADDRESS

Valid range is 0 to 254. Default is 1.

ID Start

15000

Alarms or No Alarms

Press to scroll through the Alarm Screens.

Press to go to the Settings Screens.

Settings

Press to scroll through the Settings Screens.

Press to go to the Status Screens.

Status

BACnet

ID #’s start in the 15000 block of numbers

and increment up or down by 1000.

- CURRENT ID Start

DEVICEID

15001

BACnet

The actual Device ID is the ID Start # plus whatever is

added or subtracted from this screen.

- CURRENT DEVICE ID

BaudRate

38400

BACnet® - CURRENT BAUD RATE

9600, 19200, 38400, 57600, 76800. Default is 38400.

Press to scroll through Status Screens.

VCB-X Controller Field Technical Guide

EBUS

Hi Speed

E-BUS COMMUNICATIONS

Hi Speed or Lo Speed. Default is Hi Speed.

Revised: 4/24/13

APPENDIX B - LCD SCREENS

Status Screens

Refer to the following map when navigating through the Status Screens. From the Status Screen, press <ENTER> to scroll through the screens.

Status

FORCE OCC

OFF MODE

MODE

This screen displays the current mode of operation

of the VCB-X Controller. The mode options are:

LINE 1

• UNOCCUPY (Unoccupied)

• OCCUPIED

• OVERRIDE

• HOL UNOC (Holiday Unoccupied)

• HOL OCC (Holiday Occupied)

• FRC OCC (Force Occupied)

• FRC UNOC (Force Unoccupied)

• REM OCC (Remote Occupied)

• ZONE HEAT

• ZONE COOL

• ZONE OVR (Zone Override)

Spc Temp

XX.X

SPACE TEMPERATURE

40ºF to 200ºF or 5ºC to 93ºC.

Spc RH X.X %

SPACE HUMIDITY

Sat Temp

XX.X

SUPPL Y AIR TEMPERA TURE

40ºF to 200ºF or 5ºC to 93ºC.

Oat Temp

XX.X

OUTDOOR AIR TEMPERATURE

40ºF to 200ºF or 5ºC to 93ºC.

LINE 2

• OFF MODE

• VENT MODE

• COOL MODE

• HEAT MODE

• VENT RH

• COOL RH

• HEAT RH

• WARMUP

• DEFROST

• PURGE

Revised: 4/24/13

Oat RH

XX.X

OUTDOOR AIR TEMPERATURE HUMIDITY

VCB-X Controller Field Technical Guide

APPENDIX B - LCD SCREENS

Alarm Screens

If there are no Alarms, the Alarm Screen will display “No Alarms.” If there are alarms present, the screen will display, “Alarms.” You must press

<ENTER> to scroll through the alarms. For alarm deﬁ nitions

and troubleshooting, see pages 74-77.

Alarms

The screen will display the alarms as follows:

No Alarms

SAT SENSOR See Supply Air Temperature Sensor

Failure Alarm, page 75.

OAT SENSOR See Outdoor Air Temperature Sensor

Failure Alarm, page 75.

SPC SENSOR See Space Temperature Sensor Failure

Alarm, page 75.

MAIN EXP MISSING See Missing Expansion Module Alarm,

page 75.

SUCTION SENSOR See Low Suction Pressure Sensor Alarm,

page 76.

CO2 SENSOR See CO COMP DISCHG See Compressor Discharge Sensor Failure

Alarm, page 75.

OAT CFM SENSOR See Airﬂ ow Alarms, page 75. EX CFM SENSOR See Airﬂ ow Alarms, page 75. SA CFM SENSOR See Airﬂ ow Alarms, page 75. RA CFM SENSOR See Airﬂ ow Alarms, page 75. REHEA T ALARM See Missing Expansion Module Alarm -

Reheat Board Missing, page 75.

MODGAS ALARM See Missing Expansion Module Alarm -

MODGAS Board Missing, page 75.

RLY EXP ALARM See Missing Expansion Module Alarm,

page 75.

Sensor Failure Alarm, page 75.

COOLING FAILURE See Mechanical Cooling Failure Alarm,

page 75.

HEATING FAILURE See Mechanical Heating Failure Alarm,

page 75.

FAN POF FAILURE See Proof of Flow Interlock Alarm,

page 76.

DIRTY FILTER See Dirty Filter Alarm, page 76. EMERG SHUTDOWN See Emergency Shutdown Alarm,

page 76.

HI SAT ALARM See High and Low Supply Temp Alarm,

page 76.

LO SAT ALARM See High and Low Supply Temp Alarm,

page 76.

CONTROL TEMP HI See High and Low Control Temp Failure,

page 76.

CONTROL TEMP LO See High and Low Control Temp Failure,

page 76.

DIGITAL CUTOFF See Digital Compressor Cutoff Alarm,

page 76.

DIGITAL LOCKOUT See Digital Compressor Lockout Alarm,

page 76.

HIGH HEAD See High Head Pressure Alarm, page 76. PRESSURE

NO WATER FLOW See WSHP Proof of Flow Alarm, page 76. LOW SUCTION See Low Suction Pressure Alarm,

page 76.

UNSAFE SUCTION See Unsafe Suction Pressure Alarm,

page 76.

LOW WATER TEMP See WSHP Low Leaving Water

Temperature Alarm, page 76.

ECONO TITLE 24 See Title 24 Economizer Alarms, pages

76-77.

????? ALARMS This screen should never display. But if it

does, it means the controller doesn’t know what the alarm is.

VCB-X Controller Field Technical Guide

Revised: 8/19/14

APPENDIX B - LCD SCREENS

Output Override Screens

Refer to the following map when navigating through the Output Override Screens. From the Output Override Screen, press

<ENTER>.

Output

Override

Relay #1-6

ON, OFF, AUTO

VCB-X CONTROLLER RELAYS 1-6

Press the <UP> button to change the value.

Default is AUTO.

Unloader

ON, OFF, AUTO

Press the <UP> button to change the value.

Default is AUTO.

ExpRly 1-5

ON, OFF, AUTO

Econo

-1.0, 0.0-10.0 vdc

ECONOMIZER VFD

0.0 to 10.0 = Active Force Mode.

Press the <UP> and <DOWN> buttons to

increase and decrease the value.

Default is -1.0 = AUTO.

Heating

-1.0, 0.0-10.0 vdc

MODULATING HEATING

0.0 to 10.0 = Active Force Mode.

Press the <UP> and <DOWN> buttons to

increase and decrease the value.

Default is -1.0 = AUTO.

Condense

-1.0, 0.0-10.0 vdc

MODULATING CONDENSER

0.0 to 10.0 = Active Force Mode.

Press the <UP> and <DOWN> buttons to

increase and decrease the value.

Default is -1.0 = AUTO.

VCB-X EM1 EXPANSION RELAYS 1-5

Press the <UP> button to change the value.

Default is AUTO.

Fan VFD

-1.0, 0.0-10.0 vdc

SUPPLY FAN VFD

0.0 to 10.0 = Active Force Mode.

Press the <UP> and <DOWN> buttons to

increase and decrease the value.

Default is -1.0 = AUTO.

Revised: 4/24/13

Cooling

-1.0, 0.0-10.0 vdc

MODULATING COOLING

0.0 to 10.0 = Active Force Mode.

Press the <UP> and <DOWN> buttons to

increase and decrease the value.

Default is -1.0 = AUTO.

Exhaust

-1.0, 0.0-10.0 vdc

EXHAUST FAN

0.0 to 10.0 = Active Force Mode.

Press the <UP> and <DOWN> buttons to

increase and decrease the value.

Default is -1.0 = AUTO.

VCB-X Controller Field Technical Guide

Programming Note:

Use Settings Menu In LCD Display To Program The BACnet Settings.

See Page 91

MS/TP Connection

To BACnet

Typical Terminal Blocks. All Wiring To Be T To T, SHLD (G) To SHLD (G) & R To R

For Details.

T SHLD R +

APPENDIX C - VCB-X BACnet

VCB-X BACnet® Connection To MS/TP Network

VCB-X CONTROLLER

LOOP COMM

TB1

BINARY INPUTS

TB3

ANALOG INPUTS

APP HB

OS HB

WDOG

T-

R+

COM

CUTTO ISOLATE

COM FROM GND

R63

+3.3V

+5V

GND

BACNET

T-

R+

TB7

AI1

AI2

AI3

AI4

AI5

GND

TB4

SERIAL #

485 DRV

LT1785

.1uF

BIN1

BIN2

BIN3

BIN4

R38

R41

R43

R47

3650

R68

485 DRV

4751

LT1785

.1uF

C81

+12V

GND

3650

R17

3650

R20

3650

R22

ALARM

CANCEL

RS-485 COMM LOOP. WIRE

“R” TO “R”, “T” TO “T” “SHLD” TO “SHLD”

VCB-X CONTROLLER

Orion No.: OE335-26B-VCBX

ANALOG INPUTS

AI1 = SPC (SPACE TEMP SENSOR) AI2

= SAT (SUPPLYAIR TEMP SENSOR)

AI3

= OAT (OUTDOORAIR TEMP SENSOR)

AI4

= DCT (DIGITALCOMP DISCH TEMP SENSOR)

AI5

= SPACE TEMPERATURE SLIDE OFFSET

BINARY INPUTS

BI1

= EMERGENCY SHUTDOWN

BI2

= PROOF OF FLOW

BI3

= DIRTY FILTER

BI4

= COIL TEMP SWITCH

G OUTPUTS

ANALO

AO1

= FAN VFD

AO2

= ECONOMIZER

AO3

= MOD HEATING

TRIAC OUTPUT

TR1

= DIGITALCOMP UNLOADER (24 VAC & UNLOAD

TERMINALS)

WattMaster Label

#SW000061

Rev.: 1A

24 VAC POWER

ONLY

WARNING!

POLARITY MUST

BE OBSERVED

OR THE

CONTROLLER

WILL BE

DAMAGED

GND

www.aaon.com

E-BUS

+24 VAC

EXPANSION

DOWN

www.orioncontrols.com

AAON : V28940

AAON Coil: J00142

ENTER

RELAY CONTACT RATING IS 1AMP MAX @ 24 VAC

FAN

RELAY 2

RELAY 3

RELAY 4

RELAY 5

RELAY 6

RELAY COMMON

E-BUS

EXPANSION

YS102442 REV 1

WATTMASTER CONTROLS

MADE IN USA

RLY1

RLY2

RLY3

RLY4

RLY5

RLY6

COMMON

TB2

RELAY

OUTPUTS

ALERT

R82

3650

24VAC

DIGITAL

COMP

UNLOAD

C30

ANALOG

1002

R51

OUTPUTS

2201

R59

U17

AOUT1

AOUT2

.1uF

AOUT3

C36

2201

R73

U19

GND

AOUT3AOUT1-2

GND

.1uF

STATUS 1

C46

STATUS 2

EBUS

POWER

R21

R109

R16 R14

.1uF

C21

ADDRESS

1002

OFF

1002

SW1

C14

.01uF

TB6

3650

ADD

1 2 4 8

16 32

BAUD

LOOP

Wiring Notes:

1.) All wiring to be in accordance with local and national electrical codes and specifications.

2.) All communication wiring to be 18 gauge minimum, 2 conductor twisted pair with shield. Use Belden #82760 or equivalent.

Figure 48: VCB-X BACnet Connection to MS/TP Network

VCB-X Controller Field Technical Guide

24VAC

Line Voltage

GND

Size Transformer For Correct Total Load. VCB-X Controller = 8 VA

APPENDIX C - VCB-X BACnet®

VCB-X BACnet® Parameters

BACnet® Properties for the VCB-X Controller

Parameter Object Description

Application

Software

Version

Control Mode AI:2 Conﬁ gured unit application. See Control

Control Status AI: 3 Current Occupied/

HVAC Mode AI: 4 Current operational status. See HVAC

Control

Temperature

Space

Temperature

Supply Air

Temperature

Coil

Temperature

Discharge

Temperature

Outdoor Air

Temperature

Return Air

Temperature

Leaving Water

Temperature

Outdoor Air

Wetbulb

Temperature

Outdoor Air

Dewpoint

Temperature

Indoor Air

Humidity

Outdoor Air

Humidity

Duct Static

Pressure

Building Pressure

Suction

Pressure

Head

Pressure 1

AI: 1 Current version of the

software in the unit.

Unoccupied Status.

AI: 5 Current value of the Control

Temperature Sensor.

AI:6 Current value of the Space

Temperature Sensor.

AI:7 Current value of the

Supply Air

Temperature sensor.

AI: 8 Current Coil

Temperature value.

AI:9 Current value of the

Discharge Air

Temperature Sensor.

AI: 10 Current value of the

Outdoor

Temperature Sensor.

AI: 11 Current value of the Return

Temperature Sensor.

AI:12 Current value of the

Leaving Water

Temperature Sensor.

AI:13 Current calculated Outdoor

Wetbulb Temperature.

AI:14 Current Calculated Outdoor

Air Dewpoint Temperature.

AI: 15 Current value of the Indoor

Humidity Sensor.

AI:16 Current value of the

Outdoor Humidity Sensor.

AI:17 Current Duct Static

Pressure.

AI:18 Current value of the

Building Pressure Sensor.

AI: 19 Current Suction Pressure

Value.

AI:20 Current Value of the Head

Pressure 1 Reading.

AI:21 Current Indoor

CO2 Level.

Limits

Mode Bits on

page 104.

See Control

Status Bits on

page 104.

Mode Bits on

page 104.

BACnet® Properties for the VCB-X Controller

Parameter Object Description

Outdoor Airﬂ ow

Exhaust Airﬂ ow

Supply Airﬂ ow AI:24 Current Supply Airﬂ ow

Return Airﬂ ow AI:25 Current Return Airﬂ ow

Cooling Setpoint

Heating Setpoint

Supply Air

Setpoint

Coil

Temperature

Setpoint

Head Pressure

Setpoint

Indoor

Humidity

Setpoint

Economizer

Position

Fan VFD

Signal

Modulating

Heating Position

Modulating

Cooling Position

Building

Pressure Exhaust

Control Signal

Reheat Valve

Position

Modulating

Gas Valve

Position

AI: 22 Current Outdoor Airﬂ ow

Measurement.

AI:23 Current Exhaust

Airﬂ ow Measurement

Measurement.

AI:26 Occupied Cooling Mode

Enable Setpoint Mirror.

AI: 27 Occupied Heating Mode

Enable Setpoint Mirror.

AI: 28 Current SAT Cooling or

Heating Setpoint if there is

no reset source; Current

calculated SAT setpoint

with Reset Source.

AI:29 This is the current

calculated Coil Suction

Temperature target during

Dehumidiﬁ cation Mode.

AI:30 Current Head Pressure

Setpoint.

AI:31 This reﬂ ects the value set as

the Low Indoor Humidity

Reset Limit, which initiates Dehumidiﬁ cation on indoor

controlled (non MUA)

units.

AI: 32 Current position of the

Economizer Damper.

AI:33 Current Supply Fan VFD

Signal.

AI: 34 Current percentage of the

Modulating Heating signal

(Hot Water or SCR heat).

AI: 35 Current percentage of the

Modulating Cooling Signal

(Chilled Water or Digital

Compressor).

AI: 36 Current Relief VFD Fan/

Damper Signal.

AI:37 Current position of

MHGRV Modulating Hot

Gas Reheat Valve.

AI:38 Current position of

MODGAS Modulating Gas

Valve Control.

Limits

VCB-X Controller Field Technical Guide

APPENDIX C - VCB-X BACnet

VCB-X BACnet® Parameters

BACnet® Properties for the VCB-X Controller

Parameter Object Description

Condenser 1

Control Signal

Alarm Status AI: 40 Indicates an alarm

Return Bypass

Damper

Return Air

Damper

Superheat #1

Temperature

Superheat #2

Temperature

Expansion

Valve #1

Position

Expansion

Valve #2

Position

Return Air

Humidity

Sensor Slide

Adjust Effect

Title 24

Economizer

Feedback

Head

Pressure 2

Condenser 2

Control Signal

Occupied

Cooling Setpoint

Occupied

Heating Setpoint

Hood On

Outdoor

Air Cooling

Setpoint

Hood On

Outdoor

Air Heating

Setpoint

AI:39 Condenser 1 Fan / Water

Valve Signal Status.

condition.

AI: 41 Position of Return Bypass

Damper.

AI: 42 Position of Return Air

Damper.

AI: 43 Superheat 1 Measured by

Expansion Valve Controller.

AI: 44 Superheat 2 Measured by

Expansion Valve Controller.

AI: 45 Expansion Valve 1 Position

AI: 46 Expansion Valve 2 Position

AI: 47 Return Air Humidity

Reading.

AI: 48 Amount Of Current Sensor

Slide Offset

AI: 49 Current position of feedback

from Economizer actuator.

AI: 50 Current Value of the Head

Pressure 2 Reading.

AI: 51 Condenser 2 Fan

AV: 1 If the control temperature

rises one degree above this

setpoint, the control will ac-

tivate the cooling demand.

If the control temperature

is the Supply Air Sensor,

then the cooling demand is

always active.

AV: 2 If the control temperature

drops one degree below this setpoint, the control will activate the heating

demand. If the control

temperature is the Supply

Air Sensor, then there is no

heating demand.

AV:3 This is the Cooling Mode

Enable Setpoint used only

in Hood On Mode.

AV:4 This is the Heating Mode

Enable Setpoint used only

in Hood On Mode.

Limits

See Alarm

Group Bits on

page 104.

1110

BACnet® Properties for the VCB-X Controller

Parameter Object Description

Unoccupied

Cooling Offset

Unoccupied

Heating Offset

Mode Select

Deadband

Max Coil

Setpoint

Reset Limit

Min Coil

Setpoint Reset

Limit

Supply Air

Cooling Setpoint

Supply Air

Heating

Setpoint

Max SAT

Cooling

Setpoint Reset

Limit

AV:5 During the Unoccupied

Mode of Operation, this

Setpoint offsets the

Occupied Cooling Setpoint

up by this user-adjustable

amount. If you do not want

Cooling to operate during

the Unoccupied Mode, use

the default setting of 30°F

for this setpoint.

AV:6 During the Unoccupied

Mode of Operation, this

Setpoint offsets the

Occupied Heating

Setpoint down by this user-

adjustable amount. If you

do not want Heating to

operate during the

Unoccupied Mode, use the

default setting of 30°F for

this setpoint.

AV:7 This value is added to and

subtracted from the HVAC Mode Setpoints to create a

control deadband range.

AV:8 This is the highest that the

Coil Temperature will be re-

set to during Space Humid-

ity Reset of the Coil Suction

Temperature Setpoint. If

no coil temperature reset is

required, this value should be set the same as the Low

Coil Temperature Setpoint.

AV:9 This is the lowest that the

Coil Temperature will be

reset to during Space

Humidity Reset of the Coil

Suction Temperature Set-

point. If no coil tempera-

ture reset is required, this

value should be set the same

as the High Coil

Temperature Setpoint.

AV:10 Supply Air Cooling Set-

point. If Supply Air Reset is

conﬁ gured this is the Low SAT Cooling Reset Value.

AV:11 Supply Air Heating Set-

point. If Supply Air Reset is

conﬁ gured this is the Low SAT Heating Reset Value.

AV: 12 If Supply Air Reset is con-

ﬁ gured this is the High SAT

Cooling Reset Value.

Limits

030

010

35 70

30 80

40 240

100

VCB-X Controller Field Technical Guide

Revised: 7/29/14

APPENDIX C - VCB-X BACnet®

VCB-X BACnet® Parameters

BACnet® Properties for the VCB-X Controller

Parameter Object Description

Max SAT

Heating

Setpoint Reset

Limit

Supply Air

Cooling Staging

Window

Supply Air

Heating Staging

Window

Morning

Warm-Up

Target

Temperature

Mechanical

Cooling

Outdoor Air

Lockout

Mechanical

Heating

Outdoor Air

Lockout

Low

Supply Air

Temperature

Cutoff

High

Supply Air

Temperature

Cutoff

Outdoor Air

Dewpoint

Setpoint

Economizer

Enable

Setpoint

AV: 13 If Supply Air Reset is con-

ﬁ gured this is the High SAT

Heating Reset Value.

AV: 14 In Cooling Mode, if the

Supply Air Temperature

drops below the Active

Supply Air Cooling Setpoint

minus this Staging Window,

a Cooling Stage will be

deactivated after its

Minimum Run Time.

AV: 15 In Heating Mode, if the

Supply Air Temperature

rises above the Active Supply Air Heating Setpoint plus this Staging Window, a

Heating Stage will be

deactivated after its

Minimum Run Time.

AV:16 If Morning Warm-Up is

conﬁ gured, upon entering

the occupied mode, the Warm-up Mode will be

activated if the return air

temperature falls one degree

below this setpoint.

AV:17 The VCB-X will Lockout

Mechanical Cooling when

the Outdoor Air

Temperature is below

this Setpoint.

AV:18 The VCB-X will Lockout

Mechanical Heating when

the Outdoor Air

Temperature is above this

Setpoint.

AV:19 Cooling will be disabled if

the Supply Air Temperature

falls below this value. See sequence for more details.

AV:20 Heating will be disabled if

the Supply Air Temperature

rises above this value. See sequence for more details.

AV:21 On an MUA unit, if the OA

dewpoint rises above this

setpoint, Dehumidiﬁ cation

is initiated.

AV:22 The economizer is enabled

if the outdoor drybulb,

dewpoint, or wetbulb

temperature falls below this

setpoint.

Limits

250

130

150

50 90

-30 100

-30 150

0 100

0 250

35 80

-30 80

BACnet® Properties for the VCB-X Controller

Parameter Object Description

Heat Wheel

Defrost Enable

Setpoint

Preheat

Setpoint

Space

Sensor

Calibration

Offset

Supply Air

Sensor

Calibration

Offset

Return Air

Sensor

Calibration

Offset

Outdoor Air

Sensor

Calibration

Offset

Coil

Temperature

Calibration

Offset

Leaving Water

Sensor

Calibration

Offset

CO2 Sensor

Calibration

Offset

Low Ambient

Protection

Setpoint

AV:23 The unit will go into

AV:24 If the Supply Fan is ener-

AV:25 If the Space Temperature

AV:26 If the Supply Air

AV: 27 If the Return

AV: 28 If the Outdoor Temperature

AV:29 If the Coil

AV:30 If the Leaving Water

AV:31 If the CO

AV:32 Temperature at which the

Heat Wheel Defrost if the

Outdoor Air is below this

setpoint.

gized this is the temperature

at which the Preheat Relay

will activate. Operates only

in the Occupied Mode.

Sensor is reading

incorrectly, you can use this

option to enter an offset

temperature to adjust the

Sensor’s Temperature.

Temperature Sensor is read-

ing incorrectly, you can use

this option to enter an offset

temperature to adjust the

Sensor’s Temperature.

Temperature Sensor is

reading incorrectly, you can

use this option to enter an

offset temperature to adjust

the Sensor’s Temperature.

Sensor is reading

incorrectly, you can use this

option to enter an offset

temperature to adjust the

Sensor’s Temperature.

Temperature value is

reading incorrectly, you can

use this option to enter an

offset temperature to adjust

the Coil Temperature Value.

Temperature Sensor is

reading incorrectly, you can

use this option to enter an

offset temperature to adjust

the Sensor’s Temperature.

Sensor is reading

incorrectly, you can use this

option to enter an offset

value to adjust the Sensor’s

reading.

Low Ambient Relay will

activate in the Occupied or

Unoccupied Mode.

Limits

050

-30 70

-100 100

-500 500

-30 70

Revised: 11/19/13

VCB-X Controller Field Technical Guide

APPENDIX C - VCB-X BACnet

VCB-X BACnet® Parameters

BACnet® Properties for the VCB-X Controller

Parameter Object Description

SAT Cool

Setpoint Reset

Source Low

Limit

SAT Cool

Setpoint Reset

Source High

Limit

SAT Heat

Setpoint Reset

Source Low

Limit

SAT Heat

Setpoint Reset

Source High

Limit

Control

Temperature

High Alarm

Offset

Control

Temperature

Low Alarm

Offset

Heat Pump

Compressor

Heat Lockout

Minimum

Main Fan

VFD in

Cooling Mode

AV: 33 If doing Supply Air Setpoint

Reset, this is the Low Reset

Source value in Cooling

that will correspond to the

Supply Air Cool High Reset

Setpoint.

AV: 34 If doing Supply Air Setpoint

Reset, this is the High Reset

Source value in Cooling

that will correspond to the

Supply Air Cooling Setpoint

(Low Reset).

AV: 35 If doing Supply Air Setpoint

Reset, this is the Low Reset

Source value in Heating that

will correspond to the

Supply Air Heating High

Reset Setpoint.

AV: 36 If doing Supply Air Setpoint

Reset, this is the High Reset

Source value in Heating

that will correspond to the

Supply Air Heating Setpoint

(Low Reset).

AV:37 If the temperature of the

controlling sensor rises

above the Occupied Cooling

Setpoint by this value, a

High Control Temp Alarm

will occur. Only applies

if conﬁ gured for Space or

Return Air Temp Control, or

as Single Zone VAV.

AV:38 If the temperature of the

controlling sensor falls

below the Occupied Heating

Setpoint by this value, a

Low Control Temp Alarm

will occur. Only applies

if conﬁ gured for Space or

Return Air Temp Control, or

as Single Zone VAV.

AV:39 Compressor Heat will

be locked out below this

setpoint.

AV:40 In Single Zone VAV conﬁ g-

uration, this is the fan speed

at which the VFD will start

when Cooling is initiated.

In a VAV conﬁ guration

this is the lowest fan speed

allowed in the Cooling

Mode. In CAV and MUA

conﬁ gurations this should

be set to 100%.

Limits

-30

050

-30 100

0 100

150

BACnet® Properties for the VCB-X Controller

Parameter Object Description

Minimum Main Fan

VFD in

Heating Mode

Minimum

Main Fan VFD

in Vent Mode

Maximum

Economizer in

Heating Mode

Minimum

Economizer

Position

Maximum

Economizer

CO2 Reset

Limit

Maximum

Main Fan VFD

in Heat Mode

Heat Pump

Defrost

Minimum

Interval

Heat Pump

Adaptive

Defrost

Increment

Minimum

Setpoint

AV:41 In Single Zone VAV conﬁ g-

uration, this is the fan speed

at which the VFD will start

when Heating is initiated.

In a VAV conﬁ guration

this is the lowest fan speed

allowed in the Heating

Mode. In CAV and MUA conﬁ gurations this should

be set to 100%.

AV:42 Speed at which the VFD

will operate in the Vent

Mode in Single Zone VAV.

AV:43 Max position the Econo-

mizer Damper can open in

the Heating Mode. Takes

priority over Max Position

in High CO2.

AV:44 The minimum position of

the Outdoor Air damper in

the Occupied Mode. This

can be reset upwards based

on indoor CO2 levels.

AV:45 The maximum value the

Economizer

Minimum Position can be

reset up to

during CO2 override.

AV:46 In Single Zone VAV

conﬁ guration, this is the

max fan speed the VFD

can modulate up to in Heat

Mode.

AV:47 The interval that must

be met between Defrost

Modes.

AV:48 Value added to or subtracted

from the Defrost Interval

depending on how long the

unit remains in defrost. See

sequence for details.

AV:49 This is the threshold CO

level at which the Econo-

mizer Min Damper Position

Setpoint will begin to be

reset higher.

Limits

0 100

Min.

030

0 2000

120

Min

VCB-X Controller Field Technical Guide

Revised: 2/14/14

APPENDIX C - VCB-X BACnet®

VCB-X BACnet® Parameters

BACnet® Properties for the VCB-X Controller

Parameter Object Description

CO2 Maximum

Setpoint

Indoor

Humidity

Setpoint Low

Reset Limit

Indoor

Humidity

Setpoint High

Reset Limit

Duct Static

Pressure

Setpoint

AV:50 This is the CO2 level at

which the Economizer Min

Damper Position will be

reset to the Economizer

Max Position in High CO

. In between the Min and

Max CO2 levels the Econo-

mizer Min Damper Position

will be proportionally reset

between the conﬁ gured Min

Damper Position and the

Max Position in High CO2 .

AV: 51 On indoor controlled (non

MUA) units, this is the Hu-

midity setpoint that initiates

Dehumidiﬁ cation. During

Coil Temp Reset, this is the lowest Space RH value that

corresponds to the High

Coil Temp Setpoint.

AV:52 During Coil Temp Reset,

this is the highest Space

RH value that corresponds

to the Low Coil Temp

Setpoint.

AV:53 Current Static

Pressure Setpoint.

Limits

0 2000

0 100

.10 3.0

BACnet® Properties for the VCB-X Controller

Parameter Object Description

Outdoor Air

CFM

Proportional

Window

SZ VAV Fan

Speed Integral

Schedule

Force

HVAC Mode

Override

Fan VFD

Override

AV:60 Controls rate of change

for damper signal. As OA CFM moves further from

setpoint within this window,

the damper makes a larger

change.

AV:61 The Integral Constant for

Single Zone VAV Fan

Control.

AV: 62 0 = Auto (uses controller’s

schedule)

1 = Forced

Occupied

2 = Forced Unoccupied

AV: 63 Overrides normal controller

operation in order to force

the unit into this desired

mode. Conﬁ guring for

“Auto” will restore normal unit control of the mode of

operation.

AV: 64 Override to force the VFD

to this percentage speed. Conﬁ guring “Auto” will

restore normal unit control

of the VFD speed.

Limits

10 9999

010

0=Auto 1=Vent 2=Cool 3=Heat 4=Vent

Dehum.

5=Cool

Dehum.

6=Heat

Dehum.

0% 100%

Auto=65535

Duct Static

Pressure

Control

Deadband

Building Pressure

Control Setpoint

Building Pressure

Control

Deadband

Head

Pressure

Setpoint in

Cooling Mode

Head Pressure

Setpoint in

Reheat

Mode

Minimum

Outdoor Air

CFM

AV:54 Value above and below

the Duct Static Pressure

Setpoint where no control

change occurs.

AV:55 Building

Pressure Setpoint.

AV:56 Value above and below the

Building Pressure Setpoint

where no control change

occurs.

AV:57 This is the Head Pressure

Setpoint the unit will con-

trol to in the

Cooling Mode.

AV:58 This is the Head Pressure

Setpoint the unit will

control to in the

Dehumidiﬁ cation

Reheat Mode.

AV:59 Minimum Outdoor Airﬂ ow

CFM Setpoint

.01 .5

-.20 .20

.01 .1

240 PSI

.10K 200K

420

PSI

420

PSI

Outdoor Air

Damper

Override

Warm-Up

Supply Air

Temperature

Setpoint

Cool-Down

Supply Air

Temperature

Setpoint

Cooling

Enabled

Status

Heating

Enabled

Status

Economizer

Enabled

Status

AV: 65 Overrides all other Outdoor

Air Damper position

commands so as to maintain

this ﬁ xed position.

Conﬁ guring for “Auto” will

restore normal unit control

of the Outdoor Air Damper/

Economizer operation.

AV: 66 Heating will be controlled

to this Supply Air Setpoint

during Warm-Up.

AV: 67 Cooling will be controlled

to this Supply Air Setpoint

during Cool-Down.

BI: 1 Status that indicates

Mechanical Cooling is

enabled based on the

Cooling Lockout.

BI: 2 Status that indicates that

Mechanical Heating is en-

abled based on the Heating

Lockout.

BI: 3 Status that indicates

the Economizer is enabled

based on the Economizer

Enable Setpoint.

0% 100%

Auto=65535

40 240

30 80

100

Revised 4/10/14

VCB-X Controller Field Technical Guide

Orion VCB-X, OE335-26B-VCBX-A, OE335-26B-VCBX-C Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual