Kmc controls BAC-7053, BAC-7051, BAC-7003, BAC-7001 Operation Guide

Download

Installation, Operation,

and

Applications Guide

for

BAC-7000 Series VAV controllers

For applications version 2.2

AN0311ARevision C

KMC Controls

WinControl, NetSensor, and the KMC logo are registered trademarks of KMC Controls, Inc.

TotalControl, BACstage, and FullBAC are trademarks of KMC Controls, Inc.

All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form by any means without the written permission of KMC Controls, Inc.

Printed in U.S.A.

Disclaimer The material in this manual is for information purposes only. The contents and the

product it describes are subject to change without notice. KMC Controls, Inc. makes no representations or warranties with respect to this manual. In no event shall KMC Controls, Inc. be liable for any damages, direct or incidental, arising out of or related to the use of this manual.

KMC Controls

19476 Industrial Drive New Paris, IN 46553 U.S.A. TEL: 1.574.831.5250 FAX: 1.574.831.5252 E-mail: info@kmccontrols.com

Revision C2

BAC-7000 VAV Installation, applications, and operation guide

Section 1:

Specifications .....................................................................................................................................................6

Accessories and replacement parts ..............................................................................................................10

Safety considerations .....................................................................................................................................11

Section 2:

Set the rotation limits .....................................................................................................................................14

Mounting on a VAV terminal unit ...............................................................................................................16

Wiring compartment ......................................................................................................................................17

Connecting inputs ..........................................................................................................................................18

Connecting outputs ........................................................................................................................................19

Connecting to a NetSensor ............................................................................................................................20

Connecting to an MS/TP network ...............................................................................................................21

Connecting an airflow sensor .......................................................................................................................23

Connecting power ..........................................................................................................................................23

Section 3:

Operation .........................................................................................................................................................25

Controls and Indicators .................................................................................................................................25

Restoring factory settings ..............................................................................................................................28

Maintenance ....................................................................................................................................................30

About the controllers 5

Installing the controllers 13

Operation 25

Section 4:

Assigning network addresses .......................................................................................................................31

Configuring for pressure independent VAV ..............................................................................................32

Configuring for pressure dependent VAV .................................................................................................33

Section 5:

Balancing overview ........................................................................................................................................35

The balancing procedure ...............................................................................................................................36

Section 6:

Input sources ...................................................................................................................................................39

Space setpoints ................................................................................................................................................40

Occupancy and standby ................................................................................................................................40

PID control loops ............................................................................................................................................41

Pressure independent airflow sequence .....................................................................................................41

Pressure dependent temperature control ....................................................................................................41

Changeover ......................................................................................................................................................41

Damper operation ...........................................................................................................................................42

Fan operation ..................................................................................................................................................42

Reheat sequence ..............................................................................................................................................42

Balancing sequence ........................................................................................................................................43

Configuration and set up 31

Balancing with a NetSensor 35

Sequences of operation 39

Section 7:

Pressure independent applications ..............................................................................................................46

Pressure dependent applications ................................................................................................................54

Revision C 3

Applications for BAC-7000 series VAV controllers 45

KMC Controls

Section 8:

Input objects ....................................................................................................................................................61

Output objects .................................................................................................................................................62

Value objects ....................................................................................................................................................62

Loop objects .....................................................................................................................................................63

Control Basic programs .................................................................................................................................64

Reference to objects and programs 61

Revision C4

BAC-7000 VAV Installation, applications, and operation guide

SECTION 1

About the controllers

This section is a description of the KMC Controls BAC-7000 series VAV controllers. It also introduces safety information. Review this material before installing or operating the controller.

The

BAC-7000 series VAV controllers designed for VAV terminal units. An integrated actuator and the supplied programs make these ideal controllers for single duct pressure independent or pressure dependent VAV terminal units. The following features.

are native BACnet, direct digital controllers

BAC-7000 VAV controllers

include the

◆ BACnet MS/TP compliant

◆ Automatically assigns the MAC address and the device instance

◆ On-board airflow sensor for use with a single or multi-point differential

pressure measuring station or pitot tube

◆ Use to control single duct VAV, parallel fan, and reheat

◆ An internal, easy-to-use air balancing program for air balancing

technicians.

◆ No programming required

◆ Configurable with any BACnet operator workstation

The embedded standard applications provide a wide range of single duct VAV terminal applications for both pressure independent and pressure dependent (bypass) terminal unit applications.

Pressure independent KMC Controls supplies the BAC-7000 series VAV controllers

for the following pressure independent configurations.

◆ Single duct cooling

◆ Single duct cooling with parallel fan and on/off or modulating reheat

◆ Airflow balancing

Pressure dependent The BAC-7000 series VAV controllers can be set up for the

following pressure dependent (bypass VAV) configurations.

◆ Single duct cooling

◆ Single duct with modulating or On/Off reheat

Revision C 5

About the controllers

Specifications

KMC Controls

Specifications

BAC-7000 specifications are subject to change without notice.

Inputs and outputs

BAC-7000 series VAV controllers are supplied with three universal inputs and three output connections. The type of output is model dependent. All inputs and outputs are configured to support the standard application Control Basic programs.

Table 1-1 BAC-7000 series inputs and outputs

Universal

Model

BAC-7001 3 3

BAC-7003 3 1 1 1

BAC-7051 3 3

BAC-7053 3 1 1 1

inputs

Universal outputs

Triac outputs

Relay outputs

Inputs All universal inputs are configured to support

supplied Control Basic programs. They are configurable as analog, binary, or accumulator objects to support custom programs.

Key features Standard units of measure.

Overvoltage input protection

Pull–up resistors Switch selectable for none or 10 kΩ. Connector Removable screw terminal block, wire size

AWG

14–22

Conversion 10–bit analog–to–digital conversion Pulse Counting Up to 16 Hz Input range 0–5 volts DC

Outputs, Universal All universal outputs are configured to support

supplied Control Basic programs. They are configurable as analog or binary objects to support custom programs.

Key features Output short protection

Standard units of measure

Connector Removable screw terminal block

Wire size 14–22 AWG

Output voltage 0–10 volts DC analog

0–12 volts DC binary

Output current 100 mA per output

Outputs, Relay Relay outputs are configured as binary outputs to

support the supplied Control Basic programs.

Switching Maximum switching 30 volts AC at 2 ampere Connector Removable screw terminal block

Wire size 14–22 AWG

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BAC-7000 VAV Installation, applications, and operation guide

Outputs, triac Triac outputs are configured as binary outputs to

Switching Optically isolated triac output; maximum switching

Connector Removable screw terminal block

Communications

BACnet MS/TP EIA–485 operating at rates up to 76.8 kilobaud

NetSensor Standard applications compatible with model

About the controllers

Specifications

support the supplied Control Basic programs.

30 volts AC at 1 ampere

Wire size 14-22 AWG

Automatic baud detection Automatically assigns MAC addresses and device instance numbers Removable screw terminal block Wire size 14–22 AWG

KMD-1161. Custom programming required for other models. Connects through RJ–12 connector

Programmable features

Program objects 10 program objects, 4 for standard Control Basic

programs, 6 available for custom programs

PID loop objects 4 Value objects 40 analog and 40 binary Supported objects See PIC statement for supported BACnet objects

Schedule objects 8 schedule objects

3 calendar objects

Trend objects 8 each of which holds 256 samples

Alarms and events

Intrinsic reporting Supported for input, output, value, accumulator,

trend and loop objects

Notification class objects 8

Memory Programs and program parameters are stored in

nonvolatile memory Auto restart on power failure

Applications programs KMC Controls supplies the controllers with

programming sequences for single-duct VAV applications:

◆ Pressure independent cooling with or without

parallel fan or reheat

◆ Pressure dependent single duct cooling with or

without reheat

◆ Airflow balancing

Revision C

About the controllers

Specifications

KMC Controls

Airflow sensor The sensor is flow through sensor with dual

platinum film RTD sensors on a ceramic base. The sensor output is converted to a voltage that represents 0 to 3000 FPM (15.24 m/s) using 24-inch, 1/4 inch FR tubing and SSS-1000 series flow pickups. Airflow through the sensor is approximately 1.12 SCFH (32 liters/hour) at 0.25 inches of WC (62.5 Pa) pressure drop. The airflow sensor is available as a standard BACnet analog input object.

Actuator specifications

Torque, minimum 50 in-lb. (5.7 N•m) Torque, maximum 70 in-lb. (7.9 N•m) Angular rotation 0 to 95°

Adjustable end stops at 45/60/90° rotation

Motor timing: BAC-7001, 18°/minute at 60 Hz BAC-7003 15°/minute at 50 Hz

Motor timing: BAC-7051, 60°/minute at 60 Hz BAC-7053 50°/minute at 50 Hz Shaft size Fits 0.5 inch (13 mm) round shafts

See Shaft adaptors on page 10 for 0.38 inch shafts.

Regulatory UL 916 Energy Management Equipment

FCC Class B, Part 15, Subpart B BACnet Testing Laboratory listed CE compliant SASO PCP Registration KSA R-103263

Installation

Supply voltage 24 volts AC (–15%, +20%), 50-60 Hz, 8 VA minimum,

15 VA maximum load, Class 2 only, non-supervised All circuits, including supply voltage, are power limited circuits.

Weight 2.4 lb. (1.1 kg) Case material Flame retardant green plastic

Environmental limits

Operating 32 to 120° F (0 to 49° C) Shipping –40 to 140° F (–40 to 60° C) Humidity 0–95% relative humidity (non-condensing)

Models

BAC-7001 BACnet AAC for VAV, 18°/minute at 60 Hz BAC-7051 BACnet AAC for VAV, 60°/minute at 60 Hz BAC-7003 BACnet AAC for VAV FIU, 18°/minute at 60 Hz BAC-7053 BACnet AAC for VAV FIU, 60°/minute at 60 Hz

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BAC-7000 VAV Installation, applications, and operation

guide

Dimensions

About the controllers

Specifications

Table 1-2 Controller dimensions

ABCD

8.23 in. 4.22 in. 2.25 in. 0.510 in.

209 mm 107 mm 57 mm 13 mm

Revision C

About the controllers

Accessories and replacement parts

KMC Controls

Accessories and replacement parts

Replacement parts

HMO-4531 Non Rotation Bracket- KMD-7001 HPO-0054 Bulbs HPO-0063 2-PIN KMD jumper (5/Pkg)

Shaft adaptors

HFO-0011 3/8 inch (9.5 mm) shaft adaptor

Airflow sensors Order one of the following for installation on VAV

units without airflow sensor pickup tubes.

SSS-1012 3-5/32 in. length (80 mm) for 1/4 inch O.D. tubing SSS-1013 5-13/32 in. length (137 mm) for 1/4 inch O.D. tubing SSS-1014 7-21-32 in. length (195 mm) for 1/4 inch O.D. tubing SSS-1015 9-29/32 in. length (252 mm) for 1/4 inch O.D. tubing

Power transformer

XEE-6111-40 Single-hub 120 volt transformer XEE-6112-40 Dual-hub 120 volt transformer

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BAC-7000 VAV Installation, applications, and operation

Danger

Warning

Caution

Note Detail

guide

About the controllers

Safety considerations

KMC Controls assumes the responsibility for providing you a safe product and safety guidelines during its use. Safety means protection to all individuals who install, operate, and service the equipment as well as protection of the equipment itself. To promote safety, we use hazard alert labeling in this manual. Follow the associated guidelines to avoid hazards.

Danger represents the most severe hazard alert. Bodily harm or death will occur if danger guidelines are not followed.

Warning represents hazards that could result in severe injury or death.

Caution indicates potential personal injury or equipment or property damage if instructions are not followed.

Notes provide additional information that is important.

Provides programing tips and shortcuts that may save time.

Revision C

About the controllers

Safety considerations

KMC Controls

Revision C

BAC-7000 VAV Installation, applications, and operation guide

SECTION 2

Installing the controllers

This section provides important instructions and guidelines for installing BAC-7000 series VAV controllers. Carefully review this information prior to installation.

Installing the BAC-7000 series VAV controllers includes the following topics that are included in this section.

◆ Set the rotation limits on page 14

◆ Mounting on a VAV terminal unit on page 16

◆ Connecting inputs on page 18

◆ Connecting outputs on page 19

◆ Connecting to a NetSensor on page 20

◆ Connecting to an MS/TP network on page 21

◆ Connecting an airflow sensor on page 23

◆ Connecting power on page 23

Revision C 13

Installing the controllers

Caution

Stop Pins

(1 of 2)

Stop

Selections

Clockwise

(CW)

Pins

Counterclockwise

(CCW)

Pins

Set the rotation limits

KMC Controls

Set the rotation limits

Before mounting the controller, set the rotational limits with the two supplied stop pins. These settings limit the shaft rotation in the clockwise (CW) and counterclockwise (CCW) directions. (See

The maximum amount of shaft rotation is 90°. Placing a stop pin in both 90° slots allows the actuator the full 90° of travel. Placing a stop pin in any other slot restricts actuator rotation in the either the CW or CCW direction. Refer to pin placement and travel. The first number represents the CCW pin and the second the CW pin.

Illustration 2-1.)

Illustration 2-2 for

To prevent damage to the actuator, always install both stop pins.

Before setting the rotation limits on the controller, refer to the damper position specifications in the VAV control box to which the controller will be attached. Setting rotation limits that do not match the VAV damper may result in improper operation or equipment damage.

Illustration 2-1 Controller stop selections

To set the rotational limits, do the following:

1. Turn the controller over so you have access to the back.

2. Locate the two stop pins installed in the back of the unit. (You will find one pin in a CCW setting and one in a CW setting.)

3. If the stop pins are positioned as required, leave them in place.

4. Identify the limits for the VAV terminal unit damper.

5. Remove one or both pins and place them in the correct slot.

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BAC-7000 VAV Installation, applications, and operation guide

Installing the controllers

Set the rotation limits

Illustration 2-2 Controller travel and stop selections

Revision C

Installing the controllers

Note

Anti-rotation bracket

Gear clutch button

Air sensor inputs

Conduit plugs

Lock tab

Removable conduit plate

Access cover Drive hub Status LEDs

Mounting on a VAV terminal unit

KMC Controls

Mounting on a VAV terminal unit

Mount the controller inside of a metal enclosure. To maintain RF emissions specifications, use either shielded connecting cables or enclose all cables in conduit.

Mount the controller directly over the damper shaft. A minimum shaft length of 1.75 inch (45 mm) is required. The base of the controller must contact the mounting surface to allow installation of a bracket to prevent the controller from rotating.

KMC Controls designed the controller for use with either 1/2 inch round or 3/8 inch square damper shafts. For installations with a 3/8 inch round shaft, use an HFO–0011 shaft adaptor.

Mount the controller close enough to the pitot tubes to keep the tubing length to be less than 24 inches between the controller’s inputs and the tubes.

Illustration 2-3 BAC-7000 VAV series controls and indicators

Mount the controller as follows:

1. Back the set screws out of the drive hub until the shaft can fit through the collar.

2. Place the controller on the damper shaft in the approximate final position.

3. Position the anti-rotation bracket and secure it using #8 or #10 self-tapping screws. Verify the notch in the bracket securely engages the lock tab on the controller. (Refer to Illustration 2-3.)

4. Manually position the VAV damper in the fully open position.

5. Press the gear clutch button and rotate the drive hub in the same direction that opened the damper. Turn the hub until it reaches a rotation limit.

6. Tighten the two set screws in the drive hub to approximately 50–inch pounds (5.65 N

•m) to lock the hub to the shaft.

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BAC-7000 VAV Installation, applications, and operation

MS/TP network

Input

Output

Power

Isolation lamps

Power jumper

RJ–12

Input pull-up resistors

MS/TP end-of-line termination

Restart button

guide

Installing the controllers

Wiring compartment

All input, output, power and network connection points are located beneath the access cover. Remove the two screws that secure this cover to remove the cover.

The controller comes with a removable conduit plate. The plate provides two

inch threaded conduit couplings. If conduit connections are used, note the

0.5 following:

◆ The conduit plate may be removed by removing the two screws that secure the

access cover and removing the cover. Connect the required conduit and replace the plate in the controller housing.

◆ The plugs may also be sliced to allow wiring to enter the controller with a

minimum of outside contaminates.

Revision C

Illustration 2-4 Connection points inside wiring compartment

Installing the controllers

Note

Pull-up

resistors

Off On

Input

terminals

Connecting inputs

KMC Controls

Connecting inputs

The BAC-7000 VAV controllers have three universal inputs. Each input is configured to support the standard application programs in the controller. By using the pull-up resistors, either passive or active devices may be connected to the inputs.

KMC supplied Control Basic programs assigns inputs to the following functions.

◆ Connect Input 1 to the space temperature sensor input such as the 10 kΩ.

thermistor in an STE-6000 series sensor.

◆ Connect Input 2 as a setpoint input such as a 0-10 kΩ. dial on an STE-6000

series sensor.

◆ Input 3 is for a 10 kΩ. discharge air temperature sensor.

If a NetSensor is connected to the controller, the standard application programming will use the temperature and setpoint from the NetSensor and not from devices connected to Input 1 and Input 2.

Setting the pull–up resistors For passive input signals, such as thermistors or

switch contacts, set the pull-up switch to the On position. See

Illustration 2-5 for the

pull-up switch location.

Illustration 2-5 Input terminals and pull-up resistors

Ground terminals Use the GND terminal located next to the input terminals for the

input ground connection. Up to two wires, size 14–22 AWG, can be inserted into the ground terminal. If more than two wires must be joined at a common point, use an external terminal strip for the additional wires.

Revision C

BAC-7000 VAV Installation, applications, and operation

Caution

Output terminals

guide

Installing the controllers

Connecting outputs

The output terminal configuration for a BAC-7001 and BAC-7051 controllers is different than the configuration for BAC-7003 and BAC-7053 controllers.

For a listing of the configuration of the controller output objects, see the section

Output objects on page 62.

BAC-7001 and BAC-7051 output connections

BAC-7001 and BAC-7051 controllers provide three universal outputs. These output are rated for 0-10 volt DC loads. Returns are connected to the GND terminal next to output O3 as shown in the illustration

BAC-7001 output terminals on page 19.

O1 O2 O3

GND

Illustration 2-6 BAC-7001 output terminals

BAC-7003 and BAC-7053 output connections

The BAC-7003 and BAC-7053 include one single-stage triac, one relay and one universal output.

O1 T2 RTN2 R3 RTN3

Illustration 2-7 Output terminals

When connecting loads to the triac or relay output, use only the terminal marked RTN associated with the triac or relay for the 24-volt circuit.

Output O1 This output is a universal output that can be programmed as either an

analog object for modulating reheat. The universal output is rated for 0-10 volt DC loads. Use the GND terminal on the input connector block for the ground.

Output T2 This is a triac output programmed to switch 24-volt reheat circuits. The

output is rated for 24 volt, 1 ampere loads, and switches on zero crossing. Use the RTN2 terminal for the T2 load.

Output R3 This is a normally open relay contact programmed to control a 24-volt

fan starting circuit. The relay contacts are rated for 24-volts at 2 amperes. Use RTN3 for the R3 load.

Output 4 Output 4 is internally connected to the actuator motor.

Revision C

Installing the controllers

Note

75 feet Max.

Connecting to a NetSensor

KMC Controls

Connecting to a NetSensor

The Network RJ-12 connector provides a connection port to a NetSensor model KMD-1161. Link the controller to a NetSensor with a KMC Controls approved cable up to 75 feet long. See the installation guide supplied with the NetSensor for complete NetSensor installation instructions.

If a NetSensor is connected to the controller, the standard application programming will use the temperature and setpoint from the NetSensor and not from devices connected to Input 1 and Input 2.

-A S +B

GND

Illustration 2-8 Connecting to a NetSensor

Revision C

BAC-7000 VAV Installation, applications, and operation

-A

guide

Installing the controllers

Connecting to an MS/TP network

BAC-7000 series VAV controllers BACnet MS/TP compliant controllers. For monitoring and control by building automation system, connect them only to a BACnet MS/TP network.

Connections and wiring

Use the following principles when connecting a controller to an MS/TP network:

◆ Connect no more than 128 addressable BACnet devices to one MS/TP network.

The devices can be any mix of controllers or routers.

◆ To prevent network traffic bottlenecks, limit the MS/TP network size to 60

controllers.

◆ Use 18 gauge, twisted pair, shielded cable with capacitance of no more than

50 picofarads per foot for all network wiring. Belden cable model #82760 meets the cable requirements.

◆ Connect the -A terminal in parallel with all other - terminals.

◆ Connect the +B terminal in parallel with all other + terminals.

◆ Connect the shields of the cable together at each controller. For KMC BACnet

controllers use the S terminal.

◆ Connect the shield to an earth ground at one end only.

◆ Connect a KMD–5575 BACnet MS/TP repeater between every 32 MS/TP

devices or if the cable length will exceed 4000 feet (1220 meters). Use no more than four repeaters per MS/TP network.

◆ Place a KMD–5567 surge surpressor in the cable where it exits from a building.

See Application Note AN0404A, Planning BACnet Networks for additional information about installing controllers.

Illustration 2-9 MS/TP network wiring

Revision C

Installing the controllers

Note

Set end-of-line termination to On in these controllers only.

EOL switch

Network

disconnect

switch

Off On

Connected

Disconnected

Connecting to an MS/TP network

The BAC-7000 terminals are labeled -A, +B and S. The S terminal is provided as a connecting point for the shield. The terminal is not connected to the ground of the controller. When connecting to controllers from other manufacturers, verify the shield connection is not connected to ground.

End of line termination switches

The controllers on the physical ends of the EIA-485 wiring segment must have endof-line termination installed for proper network operation. Set the end-of-line termination to On using the EOL switches.

KMC Controls

Illustration 2-10 Location for end-of-line termination

Illustration 2-5 shows the position of the controllers End-of-Line switches associated with the MS/TP connection points.

Illustration 2-11 Location of EOL switch

Revision C

BAC-7000 VAV Installation, applications, and operation

Note

Total (High)

Static (Low) Power terminals

Power jumper

guide

Installing the controllers

Connecting an airflow sensor

Connecting power

An airflow sensor is incorporated as one of the inputs to the controller. Remove the plugs and connect the tubing from the pitot assembly to the airflow sensor inputs above the drive hub. (See

Illustration 2-12.). The airflow sensor is programmed as

input 4.

Illustration 2-12 Airflow sensor inputs

Mount the controller close enough to the pitot tubes to keep the tubing length to be less than 24 inches between the controller’s inputs and the tubes.

The controllers require an external, 24 volt, AC power source. Use the following guidelines

when choosing and wiring transformers.

◆ Use a KMC Controls Class–2 transformer of the appropriate size to supply

power to the controllers.

◆ KMC Controls recommends powering only one controller from each

transformer.

◆ Do not run 24 volt, AC power from within an enclosure to external controllers.

Connect the 24 volt AC power supply to the power terminal block on the lower right side of the controller near the power jumper. Connect the ground side of the transformer to the – terminal and the AC phase to the ~

(phase) terminal. Power is applied to the controller when the transformer powered and the power jumper is in place.

Illustration 2-13 Power terminals and jumper

Revision C

Installing the controllers

Connecting power

KMC Controls

Revision C

BAC-7000 VAV Installation, applications, and operation guide

Network

disconnect

switch

Connected

Disconnected

Ready LED

Communication LED

Gear clutch button

Damper position indicator

Network isolation bulbs

Restart button

Power jumper

SECTION 3

Operation

This section provides a brief overview of the BAC-7000 series VAV controllers. Review this material before installing the controllers.

Operation

Controls and Indicators

Once configured, programmed and powered, the controller requires very little user intervention.

The following topics describe the controls and indicators found on the controller. Additional information for automatic addressing functions are described in the guide MS/TP Automatic MAC Addressing Installation Instructions that is available from the KMC Controls web site.

Network disconnect switch

The network disconnect switch is located near the RJ-12 connector. Use this switch to enable or disable the MS/TP network connection. When the switch is ON the controller can communicate on the network; when it is OFF, the controller is isolated from the network.

Alternately, you may remove the isolation bulbs to isolate the controller from the network.

Ready LED

The green Ready LED indicates the state of the controller. This includes automatic addressing functions that are fully described in the guide MS/TP Addressing For

BACnet Controllers.

Revision C 25

Illustration 3-1 Controls and indicators

Operation

Controls and Indicators

KMC Controls

Power up During controller initialization, the Ready LED is continuously

illuminated for 5 to 20 seconds. Once initialization is complete, the Ready LED begins flashing to indicate normal operation.

Normal operation During normal operation, the Ready LED flashes a repeating

pattern of one second on and then one second off.

Restart button acknowledge The restart button includes several functions for

automatic addressing that are acknowledged with the Ready LED. When the restart button is pressed, the Ready LED illuminates continuously until either of the following take place:

• The restart button is released.

• The restart button time-out period is reached and a restart operation is complete. Restart button operations are listed in the following table.

Table 3-1 Ready LED patterns for restart button operations

Controller state LED pattern

The controller is set as an automatic addressing anchor. The MAC in the controller is set to 3

The controller has sent the automatic addressing lock command to the network

No restart operation Ready LED remains unlit until the restart

A rapid repeating pattern of a short flash followed by a short pause.

Two short flashes followed by a long pause. The pattern repeats until the restart button is released.

button is released.

Communications (Com) LED

The yellow Communications LED indicates how the controller is communicating with other controllers on the network.

Sole master Repeating pattern of a long flash and a short pause that repeats once a

second. It indicates that the controller has either generated the token or is a sole MS/ TP master and has yet to establish communications with other MS/TP devices.

Token passing A short flash each time the token is passed. The frequency of the

flash is an indication of how often the device receives the token.

Nomad patterns There are three Com LED patterns that indicate that the controller

is an automatic addressing nomad controller that is receiving valid MS/TP traffic.

Table 3-2 Automatic addressing nomad patterns

Controller state LED pattern

Lost nomad A long flash

Wandering nomad A long flash followed by three short

flashes

Assigned nomad Three short flashes followed by a long

pause.

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BAC-7000 VAV Installation, applications, and operation guide

Error conditions for the LEDs

Error conditions are indicated with a combination of the Ready and Com LEDs.

◆ If the Ready LED and Com LED are both unlit, check the fuse, power, and

connections to the controller.

◆ If the Ready LED alternates with the Com LED at a one-half-second rate, there

is an error in the controller’s memory. Restoring the controller to factory default settings will typically resolve the problem.

Isolation bulbs

The two network isolation bulbs, located next to the network switch, serve three functions:

◆ Removing the bulbs opens the EIA-485 circuit and isolates the controller from

the network.

◆ If one or both bulbs are lit, it indicates the network is improperly phased. This

means that the ground potential of the controller is not the same as other controllers on the network.

◆ If the voltage or current on the network exceeds safe levels, the bulbs operate as

fuses and may protect the controller from damage.

Operation

Controls and Indicators

Gear clutch button

To manually position the damper, press the gear clutch button and rotate the drive hub.

Revision C

Operation

Caution

Note

Caution

Restoring factory settings

KMC Controls

Restoring factory settings

If the controller appears to be operating incorrectly, or is not responding to commands, you may need to reset the controller. Remove the cover and locate the red restart button.

To perform a reset or restart, locate the red restart push-button and then—in order—use one of the following procedures.

1. A warm start is the option least disruptive to the network and should be tried first.

2. If problems persist, then try a cold start.

3. If the problems continues, restoring the controller to factory settings may be required.

Read all of the information in this section before proceeding!

Momentarily pushing the red reset button while the controller remains powered will have no effect on the controller.

Performing a warm start

A warm start changes the controller as follows:

◆ Restarts the controller’s Control Basic programs.

◆ Leaves object values, configuration, and programming intact.

In the unlikely event that the checksum test in RAM fails during the warm start, the controller will automatically perform a cold start. During a cold start, controller outputs may abruptly turn connected equipment on and off. To prevent equipment damage, turn connected equipment off or temporarily remove the output terminal blocks from the controller before performing a warm start.

Do either of the following to perform a warm start:

◆ Reinitialize the controller with either BACstage or TotalControl Design Studio.

◆ Remove the power jumper for a few seconds and then replace it.

Performing a cold start

Performing a cold start changes the controller as follows:

◆ Restarts the controller programs.

◆ Returns all object states to their initial factory settings until the controller

programs update them.

◆ Leaves configuration and programming intact.

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BAC-7000 VAV Installation, applications, and operation

Caution

Note

Caution

guide

Returning object values to their relinquished defaults during a cold start may abruptly turn connected equipment on or off. To prevent equipment damage, turn connected equipment off or temporarily remove the output terminal blocks from the controller before performing a warm start.

To perform a cold start:

1. While the controller is powered, press and hold the restart button.

2. Remove the power jumper.

3. Release the red button before replacing the power jumper.

A cold start performed by this method is the same as performing a cold start with BACstage or from TotalControl Design Studio.

Restoring to factory settings

Restoring a controller to factory settings changes the controller as follows:

Operation

Restoring factory settings

◆ Removes all programming.

◆ Removes all configuration settings.

◆ Restores the controller to factory default settings.

Resetting the controller erases all configuration and programming. After resetting to factory settings, you must configure and program the controller to establish normal communications and operation.

To reset the controller to factory settings.

1. If possible, use BACstage or TotalControl Design Studio to backup the controller.

2. Remove the power jumper.

3. Press and hold the red restart button.

4. Replace the power jumper while continuing to hold the restart button.

5. Restore configuration and programming with BACstage or TotalControl Design Studio.

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Operation

Maintenance

KMC Controls

Maintenance

BAC-7000 series VAV controllers require no routine maintenance. If necessary, clean with a damp cloth and mild soap.

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BAC-7000 VAV Installation, applications, and operation guide

SECTION 4

Configuration and set up

The topics in this section are advanced topics for control technicians and engineers. Carefully review this information before installing or operating a controller.

Configuration of a BAC-7000 series VAV controller sets all of the values and settings required to control a VAV terminal unit. Typically, these settings do not change after the installation and commissioning process.

To set up the configuration functions, you will need the following items and information.

Assigning network addresses

◆ Details about the VAV terminal unit including the configuration for fans and

reheat.

◆ A BACnet operator workstation such as BACstage or TotalControl.

◆ The building automation system plans for controllers connected to a network.

Every controller on a BACnet MS/TP network must have a unique device instance and MAC address. Assigning the MAC address and device instance to a controller can be done by using either the automatic or manual method.

Automatic addressing

If the controller is part of a KMC Controls network that uses automatic addressing, follow the directions in the guide MS/TP Automatic MAC Addressing Installation Instructions that is available from the KMC Controls web site.

Manual addressing

To manually address a new controller it must first be changed to an anchor controller by doing the following:

1. Set the network switch to Off (disconnected).

2. Press and hold the restart button for 10 seconds. The Ready LED will start flashing rapidly. The Com LED will remain dark.

3. Release the restart button.

4. Turn off controller power.

5. Set the anchor network switch to On (connected).

6. Turn on controller power. The Ready LED will blink slowly and the Com LED will flash rapidly. This controller is now an anchor with a MAC address of 3.

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Configuration and set up

Note

Configuring for pressure independent VAV

Once a controller is converted to an anchor controller, connect it to a BACnet operator workstation and set the following properties.

◆ MAC address

◆ Device instance number

◆ Baud rate

KMC Controls

Configuring for pressure independent VAV

The BAC-7000 VAV controllers are supplied with programming and object configuration for single-duct VAV cooling. The following value objects must be set or verified with a BACnet operator workstation such as BACstage or TotalControl for correct operation.

When changing any of the value objects in this procedure, make the changes to the Relinquish Default property. If the change is added to the Priority Array property at any other level, the change will be deleted when the controller restarts.

Configure the damper direction to close

The CW_CLOSE value object sets the direction the controller will rotate the damper to the closed position.

◆ Set this property to Yes (Active or 1) to set the controller to close the damper in

the clockwise direction.

◆ Set the property to No (Inactive or 0) to set the controller to close the damper in

the counter clockwise direction.

Change this value in the Relinquish Default property of Binary Value object 4.

Enter the volume correction factor

The volume correction factor is used to calculate airflow based on the primary air inlet size of the VAV terminal unit. For round ducts, choose the correction factor from the following table. Enter the factor in the Relinquish Default property of Analog Value object 22, VOLFACTR.

Table 4-1 Volume factor for round ducts (inches)

Diameter Circumference Volume factor

4 12 5/8 0.087

5 15 3/4 0.136

6 18 7/8 0.196

7 22 0.267

8 25 1/8 0.349

9 28 1/4 0.442

10 31 3/8 0.545

12 37 3/8 0.785

14 44 1.068

16 50 1/4 1.396

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BAC-7000 VAV Installation, applications, and operation

Volume factor =

0.785 x Diameter 144

guide

For other sizes of round ducts, use the following formula. Diameter is in inches.

For rectangular ducts, use the following formula. Width and Height are in inches.

Configuration and set up

Configuring for pressure dependent VAV

Volume factor =

Width x Height

144

Enable or disable reheat

The BAC-7000 VAV controllers are supplied with reheat enabled. To disable reheat, set the Relinquish Default property of REHEAT, Binary Value object 5, to Inactive

(0).

Configure auxiliary airflow (optional)

Auxiliary airflow sets the airflow when reheat is active and is not used if reheat is disabled. Enter the value for the auxiliary airflow in the Relinquish Default property of Analog Value object 28, AUX_FLOW.

Set the airflow limits

VAV airflow limits can be set with either a KMD-1161 NetSensor or with a BACnet operator workstation. Enter the values in the Relinquish Default properties of Analog Value objects 20 and 21, MIN_FLOW, and MAX_FLOW.

To set the values with a NetSensor, follow the procedures in the section Balancing

with a NetSensor on page 35.

Set the temperature setpoint limits

The temperature setpoint limits place limits on the highest heating setpoint and the lowest cooling setpoint a user can enter. Enter the values in the Relinquish Default properties of Analog Value objects 11 and 12, STPT_MIN and STPT_MAX.

Configuring for pressure dependent VAV

Revision C

To operate a BAC-7000 series VAV controller as a pressure dependent controller, use a BACnet operator workstation to make the following changes.

◆ Halt Program object 1 and enable Program object 2 to run. If available, set the

program object to automatically run on a coldstart.

◆ Configure the damper direction to close on page 32

◆ Enable or disable reheat on page 33

◆ Set the temperature setpoint limits on page 33

Configuration and set up

Configuring for pressure dependent VAV

KMC Controls

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BAC-7000 VAV Installation, applications, and operation guide

Note

SECTION 5

Balancing with a NetSensor

Topics in this section are for control technicians or engineers who will be balancing the airflow in the controllers.

The airflow balancing procedure described in this section requires the following items.

◆ An airflow hood or other accurate method to measure airflow.

◆ An KMD-1161 NetSensor. If the system does not include one of these sensors,

temporarily disconnect the installed sensor and connect a KMD-1161 as a service tool.

◆ The engineering design specifications for the minimum and maximum airflow

setpoints.

Balancing overview

The procedures in this section are for pressure independent systems only.

The airflow setpoints can be entered either in the balancing routines or they can be entered through the use of a BACnet operator workstation. This is described in the section entered, they must be entered before balancing.

Balancing airflow is the process of calibrating the internal airflow sensor to a known standard. In the field, airflow is measured with an airflow hood or other measuring instrument and then compared to the airflow measurements from the sensor in the controller. The balancing process uses a KMD-1161 NetSensor as the technicians service tool for initiating the balancing sequence and entering actual flow measurements.

When the balancing sequence starts, all other functions of the controller are locked out.

Configuration and set up on page 31. Regardless of how these setpoints are

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Balancing with a NetSensor

SET

POINT

TEMP O.A.T. OVERRIDE

B5 B6 B7

Choose airflow

1-Max 0-Min

Space temperature

Minimum airflow

setpoint

Actual airflow at

maximum

Airflow (CFM)

Actual airflow at minimum

Maximum airflow setpoint

The balancing procedure

KMC Controls

The balancing procedure

This balancing procedure requires a KMD-1161 NetSensor as a service tool. If other sensors are permanently installed, temporarily connect a KMD-1161 to the controller, perform airflow balancing, and then return the original sensors to the installation.

In the following procedures, the NetSensor buttons are referenced as they are labeled on a standard KMD-1161. If the NetSensor has custom labeling, refer to the button diagram included with each step or the illustration

Standard NetSensor button

assignments on page 36.

Illustration 5-1 Standard NetSensor button assignments

Start the balancing routine To start balancing or to set the airflow setpoints, do the

following.

1. Start the balancing routine by pushing together and then releasing B5 and B7

. The display changes to AUX and then to OFF when the buttons are

released.

2. Push the Up button . The display changes to ON. The controller is now in the balancing mode.

3. Wait approximately 15 seconds.

4. Continue with the procedure Enter airflow setpoints or Balance the airflow.

Enter airflow setpoints If required, enter the airflow setpoints from the NetSensor.

This is not necessary if these setpoints are entered from a BACnet operator workstation during controller configuration.

1. Start balancing as described in the previous procedure.

2. Push B7 and use the Up and Down buttons to enter the maximum airflow setpoint.

3. Push B5 and use the Up and Down buttons to enter the minimum airflow setpoint.

4. Continue with the procedure Balance the airflow on page 36 or follow the procedure End balancing on page 37.

Balance the airflow The following procedure balances airflow at the minimum and

maximum airflow setpoints.

1. If not in balancing, see the procedure Start the balancing routine on page 36.

2. Press the Setpoint button . The NetSensor should display “01”. This is the indication that the controller is rotating the damper to the maximum airflow setpoint.

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BAC-7000 VAV Installation, applications, and operation guide

• If the NetSensor is still displaying the temperature setpoint, wait approximately 15 seconds.

• If the value is “00” press the Up button to change the display to”01”.

3. Monitor the actual airflow by pushing O.A.T. .

4. Once the actual airflow stabilizes, measure the airflow at the VAV outlet and note the measurement.

5. Push B6 and use the Up and Down buttons to enter the measured maximum airflow.

6. Press the Setpoint button and press the Down button. The display changes to “00”. This is the indication that the controller is driving the damper to the minimum airflow setpoint.

7. Monitor the actual airflow by pushing O.A.T .

8. Once the actual airflow stabilizes, measure the airflow at the VAV outlet and note the measurement.

9. Push OVERRIDE and use the Up and Down buttons to enter the measured minimum airflow.

End balancing End balancing by performing the following procedure. Balancing

will automatically end after two hours from the time the last button is pushed.

Balancing with a NetSensor

The balancing procedure

1. End balancing by pushing together and then releasing B5 and B7 . The display changes to AUX and then to ON when the buttons are released.

2. Push the Down button . The display changes to OFF. The controller is now in the normal operating mode.

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Balancing with a NetSensor

The balancing procedure

KMC Controls

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BAC-7000 VAV Installation, applications, and operation guide

SECTION 6

Sequences of operation

Topics in the section cover the sequences of operation for the BAC-7000 series VAV controllers. These are advanced topics for control technicians and engineers.

These sequences of operation are descriptions of each major components of the BAC-7000 VAV programming. They are provided as an aid to understanding on how the controllers operate.

This section covers the following sequences of operation.

◆ Input sources on page 39

◆ Space setpoints on page 40

◆ Occupancy and standby on page 40

◆ PID control loops on page 41

◆ Changeover on page 41

◆ Pressure independent airflow sequence on page 41

◆ Pressure dependent temperature control on page 41

◆ Damper operation on page 42

◆ Fan operation on page 42

◆ Reheat sequence on page 42

◆ Balancing sequence on page 43

Sequences of operation

Input sources

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The BAC-7000 series VAV controllers require specific sensors for room temperature, room setpoint, and airflow through the VAV terminal unit.

The controllers are set up for KMD-1161 NetSensors. When a NetSensor is connected to a controller, the programming automatically detects the sensor and updates Analog Value objects AV1, SPACESTP, and AV2, SPACESSTPT, from the values passed from the NetSensor.

If a NetSensor is not detected, the values from Analog Inputs objects AI1 and AI2, ROOMTEMP and STESETPOINT, are passed to Analog Value objects AV1 and AV2. Input AI1 is configured for a Type-II, 10 kΩ. thermistor and input AI2 is configured for a 10 kΩ. potentiometer.

A third input is configured as Analog Input object AI3 for a Type-III, 10 kΩ., discharge air temperature sensor. This input is not required for any of the programming sequences but may be installed for monitoring by a BACnet operator workstation or another controller on the building management system network.

The airflow sensor is an internal, flow-through sensor that is connected to airflow pickup tubes on the VAV terminal unit inlet. The input is represented by Analog Input object AI4 and is configured to represent airflow in feet-per-minute.

Sequences of operation

Space setpoints

KMC Controls

Space setpoints

The BAC-7000 VAV controllers use the following setpoints based on the user-entered setpoint or the state of occupancy and standby. See the topic

on page 40 for a description of these modes.

Active setpoint—The active setpoint is the current setpoint the controller uses to maintain temperature in the space. It is the Controlled Input property for Loop 1. Controller programming sets this value to either the Cooling Setpoint or Heating setpoint based on the state of Heating/Cooling value object. The active setpoint is stored in Analog Value object AV26,

ACTIVESP.

Occupancy and standby

Table 6-1 Active setpoint calculations

Cooling setpoint Heating setpoint

Occupied Space setpoint + 1/2 deadband Space setpoint – 1/2 deadband

Standby Space setpoint + offset Space setpoint – offset

Unoccupied Unoccupied cooling setpoint Unoccupied heating setpoint

Space setpoint—This is the setpoint entered or selected by the user and is stored in Analog Value object AV2, SPACESSTPT. The value is either the value set from the NetSensor or Analog Input object calculated from this setpoint. See the topic

Setpoint limits—The setpoint limits are entered by the controls technician during controller setup and system commissioning. Analog Value object limits the lowest cooling setpoint and Analog Value object the highest heating setpoint allowed regardless of the setting or entry of the user space setpoint.

AI1. The Active and Standby setpoints are

Input sources on page 39.

AV11, STPT_MIN,

AV12, STPT_MAX, limits

Occupancy and standby

Unoccupied setpoints—These setpoints are entered by the controls technician during controller setup and system commissioning. Analog Value objects AV39 and AV40, UNOCC_HTG_SP and UNOCC_CLG_SP, are the setpoints used when the system is unoccupied.

Standby setpoint—Standby setpoints are used when the controller is in the standby state. It is a value calculated from the current active setpoint and the value of Analog Value object AV3, OFFSET. The standby offset value is entered by the controls technician during controller setup and system commissioning. See the topic

Occupancy and standby on page 40.

The BAC-7000 VAV controllers have no internal programming to enable a change to the occupancy or standby modes.

Occupancy—Binary Value object BV2, UNOCC, sets the state controller occupancy. When the controller is in the occupied state, the active setpoint is calculated as described in the topic unoccupied state, either the cooling or heating unoccupied setpoint is used as the active setpoint. The state of this object can be controlled by a schedule object, custom Control Basic programming, or from another device on the building management network.

Standby—The Binary Value object BV1, STANDBY, sets the state of standby or occupied. When the controller is in the occupied standby state, the standby setpoint is used as the active setpoint. The state of this object can be controlled by a schedule object, custom Control Basic programming, or from another device on the building management network.

Space setpoints on page 40. When the controller is in the

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BAC-7000 VAV Installation, applications, and operation guide

Sequences of operation

PID control loops

A PID control loop calculates an error value from the difference between a measured input value and a setpoint value. The error value is expressed as a percentage and is typically used in a BAS controller to control the state of an output. When the difference between the setpoint and measured input is large, the error is large. As the system reduces the difference between the setpoint and measured input, the error becomes smaller.

The BAC-7000 series VAV controllers use three PID loops.

◆ The active setpoint loop, Loop object 1—This is a direct-acting loop. It

compares the room temperature to the active setpoint to determine the VAV flow requirement. The output of the loop is a percentage passed to Analog Value object AV16, LP1.

◆ The flow request loop, Loop object 2—This is a direct-acting loop. It compares

actual airflow in Analog Value object AV27, VOLUME1 to the requested flow in Analog Value object AV25, RQSTFLOW. The output of the loop is passed to Analog Value object AV17, LP2, and is used to calculate the movement of the damper to control airflow.

◆ The heating loop, Loop object 3—This reverse acting loop compares room

temperature to Analog Value object AV29, HEAT_SP. The output of the loop is passed to Analog Value object AV18, LP3, to calculate the call for reheat. See the

Reheat sequence on page 42 for a description of the reheat sequence.

topic

The PID loops in the controllers are standard BACnet objects and are listed in the

Loop objects on page 63.

topic

Pressure independent airflow sequence

Pressure dependent temperature control

Changeover

For pressure independent VAV installations, the airflow through the VAV terminal unit is determined by Loop 1 and Loop 2 both of which are direct acting loops.

Loop object 1, a direct acting loop, compares the room temperature to the active setpoint to determine a required change in temperature which is passed to Analog Value object AV16, LP1. The value of LP1 is inverted if in heating mode and not inverted for cooling and then passed to Analog Value object 25, RQSTFLOW, as the setpoint reference property for Loop object 2. This is compared to the actual airflow. The result is passed to Analog Value object AV17, LP2. LP2 is then used by the damper routine to open or close the damper.

See also the topic, Damper operation on page 42.

For pressure dependent (bypass) control, only Loop object 1 is used to control damper position.

Loop object 1, a direct acting loop, compares the room temperature to the active setpoint to determine a required change in temperature. The temperature change is stored in Analog Value object AV16, LP1. LP1 is then used by the damper routine to open or close the damper.

The BAC-7000 VAV controllers are configured as cooling only controllers. The controller can be commanded to heating from another controller connected to the building management system network or by adding custom Control Basic programming. Changeover from cooling to heating is controlled by the Binary Value object BV3, HEATING.

Revision C

Sequences of operation

Damper operation

KMC Controls

Damper operation

Fan operation

Reheat sequence

The damper position is calculated and then commanded to move through Analog Output object AO4, MOTOR. When the output is commanded to 0 volts the motor drives the damper counterclockwise, 10 volts drives the damper clockwise, and 5 volts stops the damper. Controller programming limits the motor run-time in either direction to no longer than 6 minutes. See

page 41 or Pressure dependent temperature control on page 41 for a description of how

damper position is determined.

Damper position is indicated by Analog Value object 32, DMPR_POS. It is calculated with programming by measuring the time the damper has been commanded open or closed and comparing it to the time required for 90° rotation. It is not used as feedback in the control sequence.

(Pressure Independent only) If the controller is configured for fan operation, the controller will start the fan when there is a call for reheat. The fan starts when the Reheat Setpoint loop is above 5% and stops 30 seconds after the reheat output is turned off. See the topic

BAC-7000 VAV controllers simultaneously control modulating and On/Off reheat outputs. All reheat is controlled by Loop object 3 which is described in the topic

control loops on page 41.

Binary Value object BV5, REHEAT, enables both modulating and On/Off reheat.

Reheat sequence on page 42.

Pressure independent airflow sequence on

PID

Modulating reheat The controller controls for modulating reheat with 0-10 volts

DC at Analog Output object AO1, ANALOG_HEAT. On a call for reheat, the reheat output is modulated over the span of the Heating Setpoint loop. If the loop is less than 5%, the reheat output remains at zero.

HTG %

100

Reheat loop%

5 0

Illustration 6-1 Modulating reheat operation

HTG SPAN

HTG SP

Room temp increase

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BAC-7000 VAV Installation, applications, and operation

Off

Reheat

100%

50%

HTG SP

HTG SPAN Room temp. increase

Heat loop increase

guide

On/Off reheat When reheat is enabled, the controller turns on the Binary Output 2

when the output of Loop object 3 reaches 50%. The output will remain on until the output of the loop falls below 5%.

Staged reheat options The BAC-7000 controllers do not directly support staged

reheat. Staged reheat can be added by connecting an external staging relay to the modulating reheat analog output. See the section Applications for BAC-7000 series

VAV controllers on page 45 for adding the staging relay.

Sequences of operation

Balancing sequence

Illustration 6-2

Balancing sequence

When the balancing sequence starts, all other functions of the controller are locked out.

At the start of the sequence, the technician uses the NetSensor to drive the damper open until the airflow reaches the maximum airflow setpoint. An airflow measurement is made with an airflow hood and the actual airflow value is entered into the controller. Once the actual airflow is entered, the technician commands the controller to drive the damper closed to the minimum airflow setpoint. Another measurement is made with the flow hood and that measurement is entered into the controller.

After both measurements are entered, the programming in the controller calculates airflow correction factors which are used to adjust measurements from the internal airflow sensor. Balancing is complete and the controller is returned to normal operation.

Balancing automatically ends two hours after the last button is pushed.

For the procedure to use the balancing routine, see the section Balancing with a

NetSensor on page 35.

Revision C

Sequences of operation

Balancing sequence

KMC Controls

Revision C

BAC-7000 VAV Installation, applications, and operation guide

SECTION 7

Applications for BAC-7000 series VAV controllers

This section covers the drawings, materials, and instructions for specific VAV applications.

Each BAC-7000 VAV model is designed for a specific set of applications. The following topics are for control technicians and engineers that will design installations and install the controllers

The application drawings in this section are supported by the programming supplied in the BAC-7000 series VAV controllers. Both pressure independent and pressure dependent (bypass) applications are supported.

◆ Pressure independent applications on page 46

◆ Pressure dependent applications on page 54

Revision C 45

Applications for BAC-7000 series VAV controllers

Pressure independent applications

KMC Controls

Pressure independent applications

The following pressure independent applications and configurations are supported by BAC-7000 series VAV controllers.

◆ BAC-7001 or BAC-7051 with reheat and parallel fan on page 46

◆ BAC-7001 or BAC-7051 with staged reheat and parallel fan on page 48

◆ BAC-7003 or BAC-7053 with reheat and parallel fan on page 50

◆ BAC-7003 or BAC-7053 staged reheat and parallel fan on page 52

For pressure dependent applications, see the topic Pressure dependent applications on

page 54.

BAC-7001 or BAC-7051 with reheat and parallel fan

The standard programming in a BAC-7001 or BAC-7051 controller supports parallel fan operation and On/Off reheat or modulating reheat. External relays are required to switch the fan and On/Off reheat AC circuits.

◆ The fan output switches a relay for 24 volt AC pilot duty.

◆ The modulating option for reheat can control either an electric reheat unit with

an analog input or a modulating hot water valve. The analog reheat output at output terminal AO1 varies between 0 and 10 volts DC.

◆ The On/Off reheat output switches a relay for 24 volt AC pilot duty.

For installation details, see the diagram Pressure independent BAC-7001 or BAC-7051

with reheat and parallel fan on page 47.

To configure the controller, see the topic Configuring for pressure independent VAV on

page 32.

Table 7-1 Bill of material for BAC-70x1 with reheat and parallel fan

REFERENCE PART # PART DESCRIPTION

DDC BAC-70X1 BACNET AAC FOR VAV, 3UI

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

SHEET

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR MODEL

ST-C KMD-569X TEMP SENSOR PLENUM CABLE W/CONN.

CHOOSE LENGTH

NS1 KMD-1161 NETSENSOR

FAN REE-3112 12VDC Control Relay

HT1 REE-3112 12VDC Control Relay

TX XEE-6311-50 Control Transformer, 120/240/277/480VAC-24VAC,

50VA

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BAC-7000 VAV Installation, applications, and operation guide

Applications for BAC-7000 series VAV controllers

Pressure independent applications

Illustration 7-1 Pressure independent BAC-7001 or BAC-7051 with reheat and parallel fan

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Applications for BAC-7000 series VAV controllers

Pressure independent applications

BAC-7001 or BAC-7051 with staged reheat and parallel fan

The standard programming in a BAC-7001 or BAC-7051 controller supports parallel fan operation and staged reheat with the addition of a staging relay. An external relay is also required for an AC fan circuit.

◆ The fan out relay switches a 24 volt AC pilot duty output.

◆ The analog reheat output at terminal AO1 varies between 0 and 10 volts DC to

control the staging relay.

For installation details, see the diagram Pressure independent BAC-7001 or BAC-7051

with staged reheat and parallel fan on page 49.

To configure the controller, see the topic Configuring for pressure independent VAV on

page 32.

Table 7-2 Bill of material for BAC-70x1 with staged reheat and parallel fan

REFERENCE PART # PART DESCRIPTION

DDC BAC-70X1 BACNET AAC FOR VAV, 3UI

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR MODEL

ST-C KMD-569X TEMP SENSOR PLENUM CABLE W/CONN.

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

NS1 KMD-1161 NETSENSOR

FAN REE-3112 12VDC Control Relay

HT3 REE-5001 3-STAGE RELAY CONTROLLER

TX XEE-6311-50 Control Transformer, 120/240/277/480VAC-24VAC,

KMC Controls

CHOOSE LENGTH

SHEET

50VA

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BAC-7000 VAV Installation, applications, and operation guide

Applications for BAC-7000 series VAV controllers

Pressure independent applications

Illustration 7-2 Pressure independent BAC-7001 or BAC-7051 with staged reheat and parallel fan

Revision C

Applications for BAC-7000 series VAV controllers

Pressure independent applications

BAC-7003 or BAC-7053 with reheat and parallel fan

The standard programming in a BAC-7003 or BAC-7053 controller supports parallel fan operation and On/Off reheat or modulating reheat. The BAC-7003 and BAC-7053 controllers can directly control pilot duty switching for the fan and On/ Off reheat.

◆ The fan circuit is a 24 volt AC pilot duty output.

◆ The modulating option for reheat can control either an electric reheat unit with

an analog input or a modulating hot water valve. The analog reheat output at output terminal AO1 varies between 0 and 10 volts DC.

◆ The On/Off reheat output is a 24-volt AC pilot duty output.

For connection details, see the diagram Pressure independent BAC-7003 or BAC-7053

with reheat and parallel fan on page 51.

To configure the controller, see the topic Configuring for pressure independent VAV on

page 32.

Table 7-3 Bill of materials for 70x3 with reheat and parallel fan

REFERENCE PART # PART DESCRIPTION

KMC Controls

DDC BAC-70X3 BACNET AAC FOR VAV, 1UI, 1 TRIAC, 1 N.O. RELAY

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

SHEET

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR MODEL

ST-C KMD-569X TEMP SENSOR PLENUM CABLE W/CONN.

CHOOSE LENGTH

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

SHEET

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR

MODEL

NS1 KMD-1161 NETSENSOR

TX XEE-6311-50 Control Transformer, 120/240/277/480VAC-24VAC,

50VA

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BAC-7000 VAV Installation, applications, and operation guide

Applications for BAC-7000 series VAV controllers

Pressure independent applications

Illustration 7-3 Pressure independent BAC-7003 or BAC-7053 with reheat and parallel fan

Revision C

Applications for BAC-7000 series VAV controllers

Pressure independent applications

BAC-7003 or BAC-7053 staged reheat and parallel fan

The standard programming in a BAC-7003 or BAC-7053 controller supports parallel fan operation and staged reheat with the addition of a staging relay. The BAC-7003 and BAC-7053 controllers can directly control pilot duty switching for the fan.

◆ The fan circuit is a 24 volt AC pilot duty output.

◆ The analog reheat output at terminal AO1 varies between 0 and 10 volts DC to

control the staging relay.

For connection details, see the diagram Pressure independent BAC-7003 or BAC-7053

with staged reheat and parallel fan on page 53.

To configure the controller, see the topic Configuring for pressure independent VAV on

page 32.

Table 7-4 Bill of material for BAC-70x1 with staged reheat and parallel fan

REFERENCE PART # PART DESCRIPTION

DDC BAC-70X3 BACNET AAC FOR VAV, 1UI, 1 TRIAC, 1 N.O. RELAY

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR MODEL

ST-C KMD-569X TEMP SENSOR PLENUM CABLE W/CONN.

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

NS1 KMD-1161 NETSENSOR

HT3 REE-5001 3-STAGE RELAY CONTROLLER

TX XEE-6311-50 Control Transformer, 120/240/277/480VAC-24VAC,

KMC Controls

CHOOSE LENGTH

SHEET

50VA

Revision C

BAC-7000 VAV Installation, applications, and operation guide

Applications for BAC-7000 series VAV controllers

Pressure independent applications

Illustration 7-4 Pressure independent BAC-7003 or BAC-7053 with staged reheat and parallel fan

Revision C

Applications for BAC-7000 series VAV controllers

Pressure dependent applications

KMC Controls

Pressure dependent applications

The standard applications in a BAC-7000 series VAV controller support the following pressure dependent VAV applications.

◆ BAC-7001 or BAC-7051 pressure dependent with single reheat on page 54

◆ BAC-7003 or BAC-7053 pressure dependent with single reheat on page 56

◆ Pressure dependent with staged reheat on page 58

For pressure independent applications, see the topic Pressure independent applications

on page 46.

BAC-7001 or BAC-7051 pressure dependent with single reheat

The standard programming in a BAC-7001 or BAC-7051 controller supports On/Off reheat or modulating reheat. An external relay is required for the On/Off reheat AC circuit.

◆ The modulating option for reheat can control either an electric reheat unit with

an analog input or a modulating hot water valve. The analog reheat output at terminal AO1 varies between 0 and 10 volts DC.

◆ The the On/Off reheat output switches a relay for 24 volt AC pilot duty.

To enable pressure dependent programming, see the procedure in the topic,

Configuring for pressure dependent VAV on page 33.

Table 7-5 Bill of material for BAC-70x1 with single reheat

REFERENCE PART # PART DESCRIPTION

DDC BAC-70X1 BACNET AAC FOR VAV, 3UI

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

SHEET

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR MODEL

ST-C KMD-569X TEMP SENSOR PLENUM CABLE W/CONN.

CHOOSE LENGTH

NS1 KMD-1161 NETSENSOR

HT1 REE-3112 12VDC Control Relay

TX XEE-6311-50 Control Transformer, 120/240/277/480VAC-24VAC,

50VA

Revision C

BAC-7000 VAV Installation, applications, and operation guide

Applications for BAC-7000 series VAV controllers

Pressure dependent applications

Revision C

Illustration 7-5 Pressure dependent BAC-7001 or BAC-7051 with single reheat

Applications for BAC-7000 series VAV controllers

Pressure dependent applications

BAC-7003 or BAC-7053 pressure dependent with single reheat

The standard programming in a BAC-7003 or BAC-7053 controller On/Off or modulating reheat. An external relay is not required to switch 24-volt AC devices.

◆ The modulating option for reheat can control either an electric reheat unit with

an analog input or a modulating hot water valve. The analog reheat output at output terminal AO1 varies between 0 and 10 volts DC.

◆ The On/Off reheat output is a 24-volt AC pilot duty output.

To enable pressure dependent programming, see the procedure in the topic,

Configuring for pressure dependent VAV on page 33.

Table 7-6 Bill of materials for 70x3 with reheat

REFERENCE PART # PART DESCRIPTION

DDC BAC-70X3 BACNET AAC FOR VAV, 1UI, 1 TRIAC, 1 N.O. RELAY

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR MODEL

ST-C KMD-569X TEMP SENSOR PLENUM CABLE W/CONN.

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR

NS1 KMD-1161 NETSENSOR

TX XEE-6311-50 Control Transformer, 120/240/277/480VAC-24VAC,

KMC Controls

SHEET

CHOOSE LENGTH

SHEET

MODEL

50VA

Revision C

BAC-7000 VAV Installation, applications, and operation guide

Applications for BAC-7000 series VAV controllers

Pressure dependent applications

Revision C

Illustration 7-6 Pressure dependent BAC-70x3 with reheat

Applications for BAC-7000 series VAV controllers

Pressure dependent applications

Pressure dependent with staged reheat

The standard programming in a BAC-7003 or BAC-7053 controller supports staged reheat with the addition of a staging relay. The analog reheat output at terminal AO1 varies between 0 and 10 volts DC to control the staging relay.

To enable pressure dependent programming, see the procedure in the topic,

Configuring for pressure dependent VAV on page 33.

Table 7-7 Bill of material for BAC-70x1 with staged reheat and parallel fan

REFERENCE PART # PART DESCRIPTION

DDC BAC-70X1 BACNET AAC FOR VAV, 3UI

DDC BAC-70X3 BACNET AAC FOR VAV, 1UI, 1 TRIAC, 1 N.O. RELAY

ST STE-60XX-10 CHOOSE 6011 OR 6014 SPACE TEMP SENSOR MODEL

ST-C KMD-569X TEMP SENSOR PLENUM CABLE W/CONN.

AF SSS-100X AIRFLOW SENSOR, CHOOSE SIZE 'X' FROM DATA

NS1 KMD-1161 NETSENSOR

HT3 REE-5001 3-STAGE RELAY CONTROLLER

TX XEE-6311-50 Control Transformer, 120/240/277/480VAC-24VAC,

KMC Controls

CHOOSE LENGTH

SHEET

50VA

Revision C

BAC-7000 VAV Installation, applications, and operation guide

Applications for BAC-7000 series VAV controllers

Pressure dependent applications

Illustration 7-7 Pressure dependent BAC-7000 series VAV controller pressure dependent staged reheat

Revision C

Applications for BAC-7000 series VAV controllers

Pressure dependent applications

KMC Controls

Revision C

BAC-7000 VAV Installation, applications, and operation guide

Caution

SECTION 8

Reference to objects and programs

The following topics list the BACnet objects and Control Basic programs are supplied with the controllers. These are advanced reference topics for control technicians and engineers.

The BAC-7000 VAV controllers are BACnet Advanced Application Controlles (AAC) and are composed of standard BACnet objects. This section lists the objects that are likely to be monitored by a standard BACnet operator workstation to verify system operation.

Input objects

Changing the configuration of any object or program may result in unpredictable operation of a controller and damage to equipment that is under control of a controller. See the topic Configuration and set up

on page 31 for

detailed instructions on object configuration in new controllers.

Topics in this section

◆ Input objects on page 61

◆ Output objects on page 62

◆ Value objects on page 62

◆ Loop objects on page 63

◆ Control Basic programs on page 64

The following BACnet input objects represent values at the physical inputs of the controller. For wiring details, see the topics

Applications for BAC-7000 series VAV controllers on page 45.

Connecting inputs on page 18 and

Table 8-1 Input objects

Input Name Description Object type

AI1 ROOMTEMP Room Temperature KMC10K Type II

AI2 STESETPOINT STE Setpoint Table 4

AI3

AI4

DAT Discharge Air Temp KMC10K Type III

FLOWSNSR Airflow Sensor FPM 0-3000

Revision C 61

Reference to objects and programs

Output objects

KMC Controls

Output objects

Value objects

The following BACnet output objects represent values at the physical outputs of the controller. For wiring details, see the topics

Connecting outputs on page 19 and

Applications for BAC-7000 series VAV controllers on page 45.

Table 8-2 Output objects

Input Name Description Object type

AO1 ANALOG_HEAT Mod Heating 0-100%

BO2 BINARY_HEAT Binary Heat

BO3 FAN Fan Start

AO4 Damper Motor Drive MOTOR Volts 0-10

BACnet value objects represent setpoints or other operational conditions in the controller.

Table 8-3 Analog Value objects

Object Name Description Units

AV1 SPACETEMP Space Temperature (auto) °F

AV2 SPACESSTPT Space Temp Setpoint °F

AV3 OFFSET Setpoint Offset °F

AV4 NS4_ActMinFlow User Button4 ActMinFlow cfm

AV5 NS5_MinSP User Button5 MinSP cfm

AV6 NS6_ActMaxFlow User Button6 ActMaxFlow cfm

AV7 NS7_MaxSP User Button7 MaxSP cfm

AV8 NS_MOTION Netsensor Motion

AV9 HTDMPRPOS PD Heat Damper Position %

AV10 --available--

AV11 STPT_MIN Setpoint Limit Min °F

AV12 STPT_MAX Setpoint Limit Max °F

AV13 STAT_DB Thermostat Deadband °F

AV14 --available--

AV15 --available--

AV16 LP1 Loop 1 (auto) ActiveSP% %

AV17 LP2 Loop 2 (auto) %

AV18 LP3 Loop 3 (auto) HtgSP% %

AV19 LP4 Loop 4 (auto) %

AV20 MIN_FLOW Minimum Flow cfm

AV21 MAX_FLOW Maximum Flow cfm

AV22 VOLFACTR Volume correction ft²

AV23 SNSRFACTR Sensor Correction (auto)

AV24 ACT_FLOW Actual Airflow (auto) ft/min

AV25 RQSTFLOW Requested Flow (auto) ft/min

AV26 ACTIVESP Active Temp Setpoint (auto) °F

AV27 VOLUME1 Duct Volume Readout (auto) cfm

Revision C

BAC-7000 VAV Installation, applications, and operation guide

Table 8-3 Analog Value objects (Continued)

Object Name Description Units

AV28 AUX_FLOW Auxillary Airflow cfm

AV29 HEAT_SP Heat Temperature °F

AV30 COOL_SP Cool Temperature Setpoint °F

AV31 DRV_TIME Damper Drive Time DRV_TIME

AV32 DMPR_POS Damper Position (auto) %

AV33 --available--

AV34 --available--

AV35 --available--

AV36 ACTFLOWMIN Actual Flow at Min cfm

AV37 ACTFLOWMAX Actual Flow at Max cfm

AV38 RQSTFLOWCFM Requested Flow Volume (auto) cfm

AV39 UNOCC_HTG_SP Unoccupied Heating Setpoin °F

AV40 UNOCC_CLG_SP Unoccupied Cooling Setpoint °F

Reference to objects and programs

Loop objects

Table 8-4 Binary value objects

Object Name Description Units

BV1 STANDBY Standby Mode Inactive/Active

BV2 UNOCC Unoccupied command Off/On

BV3 HEATING Changeover Mode Cool/Heat

BV4 CW_CLOSE Clockwise to Close No/Yes

BV5 REHEAT Reheat Status Disabled/Enabled

BV6 --available--

BV7 --available--

BV8 BALANCE Balancer OVRD Off/On

BV9 NETSENSOR NetSensor? Off/On

BACnet PID loops are used for modulating the damper and controlling reheat.

Table 8-5 Table 8–7 PID control loop objects

Loop Name Description Units

LOOP1 ACTSETCON Active Setpoint

LOOP2 FLWRQSTCON Flow Request

LOOP3 HTSETCON Heat Setpoint %

Revision C

Reference to objects and programs

Control Basic programs

KMC Controls

Control Basic programs

The following sections provide the Control Basic supplied with the controllers. Program 1, 3, and 4 are configured to run automatically when the controller starts.

Table 8-6 Program objects

Automaticaly run

Program Name Description

5-10 --available-- No

SINGLEVAV Single Duct Pressure Indep VAV

SINGLEPRESS Single Duct Pressure Depend VAV

REHEAT Reheat (Mod & 2-Stg)

CALIB_UTIL Calibration Utility

on coldstart

Ye s

Program 1—Pressure independent VAV

Program 1 configures the controller to run as a pressure independent VAV controller. All input, output, value objects, and PID control loops are configured to support this program. The program is configured to start automatically when the controller is powered.

10 REM *** Pressure Independent BAC-70xx VAR 2.2 GS 5/27/14 *** 20 IF MODELNUMBER = 32 OR MODELNUMBER = 34 THEN AV31 = 300 ELSE AV31 = 90

90 REM BALANCER OVRD 110 IF+ BV8 THEN S = AV2 130 IF- BV8 THEN START T , END 140 IF TIMEON( BV8 ) > 2:00:00 THEN BV8@8 = 0 , END 150 IF TIMEON( T ) > 20 THEN AV2@8 = S , STOP T , END 160 IF T THEN END

170 IF BV8 = 0 THEN GOTO 250 180 IF AV2 > 1 THEN AV2@8 = 1 : IF AV2 < 1 THEN AV2@8 = 0 : REM Bal Limits 190 IF AV2 = 1 THEN AV25 = AV21 / AV22 ELSE AV25 = AV20 / AV22 : REM Bal Flow Settings 200 GOTO 380

250 REM Temp SPs If no NetSensor use AI1 & AI2 (Not for STE-6012/

16) 260 BV9 = NETSENSORSTATUS 270 IF BV9 THEN GOTO 310 280 IF NOT BV9 THEN RLQ AV8@8 290 IF AI1 < 0 THEN RLQ AV1@8 , RLQ AV2@8 , GOTO 310 ELSE AV1@8 = AI1 : REM Use Sensor if present 300 IF AI2 > 89 THEN GOTO 310 ELSE AV2@8 = AI2 : REM Use Setpoint if present 310 IF BV3 THEN AV26 = AV29 ELSE AV26 = AV30 320 IF BV3 THEN A = 1 - AV16 / 100 ELSE A = AV16 / 100 330 AV2@8 = MIN( MAX( AV2 , AV11 ) , AV12 ) : REM Apply SP limits 340 IF BV1 = 0 THEN AV29 = AV2 - AV13 / 2 ELSE AV29 = AV2 - AV3 350 IF BV1 = 0 THEN AV30 = AV2 + AV13 / 2 ELSE AV30 = AV2 + AV3 355 IF BV2 = 1 THEN AV29 = AV39 356 IF BV2 = 1 THEN AV30 = AV40

Revision C

BAC-7000 VAV Installation, applications, and operation guide

360 REM Flow Calc (FPM & CFM) 370 AV25 = ( ( AV21 - AV20 ) * A + AV20 ) / AV22 : REM RQSTFLOW(fpm) 380 AV24 = AI4 * AV23 : REM CORRECTED FPM 390 AV27 = AV24 * AV22 : REM CFM In

400 REM Damper Control 410 IF AV17 > 65 AND BV4 THEN START B 420 IF AV17 > 65 AND NOT BV4 THEN START C 430 IF AV17 < 35 AND BV4 THEN START C 440 IF AV17 < 35 AND NOT BV4 THEN START B 450 IF AV17 > 35 AND AV17 < 65 THEN STOP B , STOP C 460 IF B THEN STOP C 470 IF C THEN STOP B 480 X = 1 / SCANS 490 IF AV17 < 99 AND AV17 > 1 THEN GOTO 500 ELSE GOTO 560 500 IF AV17 < 36 OR AV17 > 64 THEN START D ELSE STOP D 510 IF TIMEON( D ) > 0:00:10 THEN GOTO 560 520 Y = X + Y 530 IF Y > 5 THEN Y = 0 540 Z = ABS( AV17 - 50 ) / 50 550 IF Y > Z THEN STOP B , STOP C 560 IF B THEN AO4 = 10 570 IF C THEN AO4 = 0 580 IF NOT B AND NOT C THEN AO4 = 5 590 IF AO4 > 7 THEN START G ELSE STOP G 600 IF AO4 < 3 THEN START H ELSE STOP H 610 IF TIMEON( G ) > 0:06:00 OR TIMEON( H ) > 0:06:00 THEN AO4 = 5 , START I ELSE STOP I 620 IF TIMEON( I ) > 0:06:00 THEN STOP G , STOP H , STOP B , STOP C 630 IF BV4 AND AO4 < 3 THEN AV32 = AV32 + X * 100 / AV31 640 IF BV4 AND AO4 > 7 THEN AV32 = AV32 - X * 100 / AV31 650 IF NOT BV4 AND AO4 < 3 THEN AV32 = AV32 - X * 100 / AV31 660 IF NOT BV4 AND AO4 > 7 THEN AV32 = AV32 + X * 100 / AV31 670 IF AV32 > 100 THEN AV32 = 100 680 IF AV32 < 0 THEN AV32 = 0 690 END

Reference to objects and programs

Control Basic programs

Revision C

Reference to objects and programs

Control Basic programs

Program 2—Pressure dependent VAV

Program 2 configures the controller to run as a pressure dependent VAV controller. All input, output, value objects, and PID control loops are configured to support this program. The program is not configured to run automatically when the controller is powered. To change the controller to pressure dependent VAV, use a BACnet operator workstation to halt Program 1 and start Program 2.

10 REM *** Pressure Dependent BAC-70xx VAR 2.2 GS 5/27/14 *** 80 REM Temp SPs If no NetSensor use AI1 & AI2 (Not for STE-6012/

16) 90 BV9 = NETSENSORSTATUS 100 IF BV9 THEN GOTO 140 110 IF NOT BV9 THEN RLQ AV8@8 120 IF AI1 < 0 THEN RLQ AV1@8 , RLQ AV2@8 , GOTO 140 ELSE AV1@8 = AI1 : REM Use Sensor if present 130 IF AI2 > 89 THEN GOTO 140 ELSE AV2@8 = AI2 : REM Use Setpoint if present 140 IF BV3 THEN AV26 = AV29 ELSE AV26 = AV30 150 AV2@8 = MIN( MAX( AV2 , AV11 ) , AV12 ) : REM Apply SP limits 160 IF BV1 = 0 THEN AV29 = AV2 - AV13 / 2 ELSE AV29 = AV2 - AV3 170 IF BV1 = 0 THEN AV30 = AV2 + AV13 / 2 ELSE AV30 = AV2 + AV3

KMC Controls

180 REM HEAT MODE 190 IF LOOP3 > 30 THEN START Q 200 IF LOOP3 < 1 THEN STOP Q 210 IF TIMEON( Q ) > 0:01:00 THEN START BV3 ELSE STOP BV3

220 REM CALIBRATE DAMPER 230 IF+ INT( TIME / 100 ) < 1 THEN START U 240 IF POWERLOSS THEN START U 250 IF TIMEON( U ) > AV31 THEN STOP U 260 IF U AND BV4 THEN AO4 = 0 , STOP BV3 270 IF U AND NOT BV4 THEN AO4 = 10 , STOP BV3 280 IF U OR BV3 THEN GOTO 520

290 REM Damper Control 300 IF AV16 > 70 THEN START C , STOP B 310 IF AV16 < 30 THEN START B , STOP C 320 IF AV16 > 35 AND AV16 < 65 THEN STOP B , STOP C 330 X = 1 / SCANS 340 IF AV16 < 99 AND AV16 > 1 THEN GOTO 350 ELSE GOTO 420 350 IF AV16 < 36 OR AV16 > 64 THEN START D ELSE STOP D 360 IF TIMEON( D ) > 0:00:10 THEN GOTO 420 370 REM The following will pulse the actuator as it nears satisfied position to reduce overshoot 380 Y = X + Y : IF Y > 5 THEN Y = 0 390 Z = ABS( AV16 - 50 ) / 50 400 IF Y > Z THEN STOP B , STOP C 410 REM Drive Damper 420 IF B AND NOT BV4 THEN AO4 = 0 : REM Close damper CCW 430 IF B AND BV4 THEN AO4 = 10 : REM Close damper CW 440 IF C AND NOT BV4 THEN AO4 = 10 : REM Open damper CW 450 IF C AND BV4 THEN AO4 = 0 : REM Open damper CCW 460 IF NOT B AND NOT C THEN AO4 = 5 : REM Stop Damper 470 IF AO4 > 7 THEN START G ELSE STOP G : REM Check Drive Time 480 IF AO4 < 3 THEN START H ELSE STOP H : REM Check Drive Time 490 IF TIMEON( G ) > 0:06:00 OR TIMEON( H ) > 0:06:00 THEN AO4 = 5 , START I ELSE STOP I : REM Stop Driving Damper 500 IF TIMEON( I ) > 0:03:00 THEN STOP G , STOP H , STOP B , STOP C : REM Allow Damper to be Driven

Revision C

BAC-7000 VAV Installation, applications, and operation guide

510 REM ESTIMATE DAMPER POSITION 520 P = 1 / SCANS 530 IF NOT BV4 AND AO4 < 3 THEN AV32 = AV32 - P * 100 / AV31 540 IF NOT BV4 AND AO4 > 7 THEN AV32 = AV32 + P * 100 / AV31 550 IF BV4 AND AO4 < 3 THEN AV32 = AV32 + P * 100 / AV31 560 IF BV4 AND AO4 > 7 THEN AV32 = AV32 - P * 100 / AV31 570 IF AV32 > 100 THEN AV32 = 100 580 IF AV32 < 0 THEN AV32 = 0 590 END

Program 3—Reheat

Program 3 configures the controller for a parallel fan and On/Off and modulating reheat. The program is configured to start automatically when the controller is powered. For custom reheat programming, halt this program and add custom programming to Programs 5-10.

10 REM *** Reheat BAC-70xx VAR 2.2 GS 5/27/14 *** 20 REM ---------FAN POWERED 1-STAGE AND/OR MODULATING REHEAT SEQUENCE---------30 REM Entire reheat sequence is easily disabled by toggling BV5 on-off. 40 REM Auxillary flow setpoint is used if AUXILLARY FLOW( AV28 ) > MIN FLOW( AV20 )

Reference to objects and programs

Control Basic programs

50 IF BV5 THEN GOTO 90 60 AO1 = 0 : STOP BO2 70 IF TIMEOFF( BO2 ) > 0:00:30 THEN STOP BO3 80 END : REM If no reheat then stop

90 REM Reheat With Fan 100 AO1 = AV18 : REM Modulating Valve 110 IF AV18 > 50 THEN BO2 = 1 , AO1 = LOOP3 : REM Start Reheat 120 IF AV18 < 5 THEN BO2 = 0 , AO1 = 0 : REM Stop Reheat 130 IF AO1 > 10 OR BO2 = 1 THEN BO3 = 1 140 IF BV8 = 1 THEN GOTO 160 150 IF AO1 > 10 OR BO2 = 1 THEN AV25 = MAX( AV20 , AV28 ) / AV22 160 IF AO1 < 5 AND TIMEOFF( BO2 ) > 0:00:30 THEN STOP BO3 : REM STOP FAN 170 END

Program 4—Calibration

Program 4 calculates airflow correction factors for the balancing routine. This program is only required for pressure independent VAV control.

10 REM *** Calibration BAC-70xx VAR 2.2 GS 5/27/14 *** 20 REM -- NetSensor Buttons --

30 IF POWERLOSS THEN GOTO 230

40 IF BV8 = 0 THEN GOTO 110 50 REM Balancing Mode 60 AV20@8 = AV5 : REM AV20 = MinCFMSP Btn 5 70 AV21@8 = AV7 : REM AV21 = MaxCFMSP Btn 7 80 AV36@8 = AV4 : REM AV36 = ActualMinCFM Btn 4 90 AV37@8 = AV6 : REM AV37 = ActualMaxCFM Btn 6 100 GOTO 160

Revision C

Reference to objects and programs

Control Basic programs

110 REM Normal Mode 120 AV5@8 = AV20 : REM MinCFMSP Btn 5 = AV20 130 AV7@8 = AV21 : REM MaxCFMSP Btn 7 = AV21 140 AV4@8 = AV36 : REM ActualMinCFM Btn 4 = AV36 150 AV6@8 = AV37 : REM ActualMaxCFM Btn 6 = AV37

160 REM Calculate SensorCorrection AV23 (using AV36 & AV37 values ) 170 H = AV37 / AV21 : L = AV36 / AV20 180 AV23 = ( AV38 - AV20 ) * ( H - L ) / ( AV21 - AV20 ) + L

190 REM Calculate Requested Flow in CFM 200 AV38 = AV25 * AV22 : REM RQSTFLOW in CFM..AV38 for display on graphics 210 AV36@10 = AV20 : AV37@10 = AV21 : REM Sets temporary values 220 END

230 REM ------ Saves Balance Data After Power loss ----240 IF ABS( AV6 - 150 ) > 0.5 THEN AV37@8 = AV6 250 IF ABS( AV4 - 50 ) > 0.5 THEN AV36@8 = AV4 260 END

KMC Controls

Revision C

BAC-7000 VAV Installation, applications, and operation guide

Index

accessories 10

actuator specifications airflow sensor

connecting sequence of operation specifications

airflow setpoint configuration applications

pressure dependent pressure independent

automatic network address auxiliary airflow configuration

BACnet objects 61

inputs

loops

output value

balancing balancing sequence baud bulbs

network isolation replacement

changeover sequence 41

clockwise to close communications LED conduit connections configuration

airflow setpoints

auxiliary airflow 33

damper direction to close network addresses

pressure dependent 33

pressure independent reheat

temperature sepoint limits 33

volume correction factor

Control Basic programs

balancing and calibration

pressure dependent VAV 66

pressure independent VAV reheat and fan

damper

direction to close manual position operation sequence position indicator position sequence shaft size

device instance dimensions direction to close the damper

42 25 42

end-of-line switches 22

fan operation, sequence 42

inputs

as BACnet objects NetSensor pull-up specifications wiring

LED

communications ready

loop objects

MAC address 31

maintenance MS/TP

specifications

termination 21

wiring

NetSensor

as a balancing tool as an input detecting wiriing

Revision C 69

KMC Controls

network

addresses disconnect switch end-of-line isolation bulbs termination wiring

occupancy sequence 40

operation outputs

as BACnet objects by model specifications wiring

PID loops

as BACnet objects sequence of operation

power supply

requirements wiring

pressure dependent

applications configuration

pressure independent

applications configuration

pull-up resistors

sequences of operation 39, 40

airflow sensor balancing changeover damper fan operation input sources NetSenor occupancy PID loops pressure dependent pressure independent reheat

standby

specifications

actuator airflow sensor dimensions inputs

MS/TP network outputs power supply

speed of rotation standby sequence stop pins

42 39

temperature setpoints 40

termination for MS/TP

ready LED 25

reheat

configuration sequence

replacement parts rotation

limits

speed 8

value objects 62

volume correction factor

wiring 17

inputs

MS/TP NetSensor

outputs 19

power supply

Revision C70

Kmc controls BAC-7053, BAC-7051, BAC-7003, BAC-7001 Operation Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

About the controllers

Specifications

Accessories and replacement parts

Safety considerations

Installing the controllers

Set the rotation limits

Mounting on a VAV terminal unit

Wiring compartment

Connecting inputs

Connecting outputs

Connecting to a NetSensor

Connecting to an MS/TP network

Connecting an airflow sensor

Connecting power

Operation

Operation

Controls and Indicators

Restoring factory settings

Maintenance

Configuration and set up

Assigning network addresses

Configuring for pressure independent VAV

Configuring for pressure dependent VAV

Balancing with a NetSensor

Balancing overview

The balancing procedure

Sequences of operation

Input sources

Space setpoints

Occupancy and standby

PID control loops

Pressure independent airflow sequence

Pressure dependent temperature control

Changeover

Damper operation

Fan operation

Reheat sequence

Balancing sequence

Applications for BAC-7000 series VAV controllers

Pressure independent applications

Pressure dependent applications

Reference to objects and programs

Input objects

Output objects

Value objects

Loop objects

Control Basic programs

Index