Factory Packaged Controls
LED BLINK CODES
LED NAME STAT
BLINKS QTY. OF SENSORS INSTALLED
LED NAME
ALARM
NO PROBLEMS 0
NO SENSORS DETECTED 1
HIGH HEAD PRESSURE DETECTED 2
LOW HEAD PRESSURE DETECTED 3
One Condenser
Head Pressure Module
Technical Guide
RATING IS 1 AMP
RELAY CONTACT
E-BUS
Connector
REV. VLV. ENABLE
MAX @ 24 VAC
RELAY COMMON
1COrion No.:OE370-23-HP
www.aaon.com
One Condenser Head Pressure Module
A1
+5V
HEAD
SIG 1
PRESSURE
GND
TRANSDUCER #1/
A2
+5V
HEAD
SIG 2
PRESSURE
GND
TRANSDUCER #2
A3
+5V
HEAD
SIG 3
PRESSURE
GND
TRANSDUCER #3
A4
+5V
HEAD
SIG 4
PRESSURE
GND
TRANSDUCER #4
COND. ENABLE INPUT
BIN 1
REV. VLV. INPUT ENABLE
BIN 2
BIN 3
NOT USED
COM
COMMON
WattMaster Label
E-BUS
Connector
#LB102057-A
Rev.: 1J
COND. ENABLE
NOT USED
NOT USED
AAON No.:
COND. SIGNAL
NOT USED
GND
COND. FAN
COND. FAN
NOT USED
NOT USED
R74860
AO1
AO2
GND
PWM1PWM1+
PWM2PWM2+
GND
R1
R2
R3
R4
RC
+24 VAC
One Condenser Head Pressure Module
Table of Contents
OVERVIEW ........................................................................................................................................................ 3
Overview ......................................................................................................................................................................................3
Features .......................................................................................................................................................................................3
INSTALLATION AND WIRING ........................................................................................................................... 4
Environmental Requirements ....................................................................................................................................................... 4
Mounting.......................................................................................................................................................................................4
Power Supply ...............................................................................................................................................................................5
Important Wiring Considerations .................................................................................................................................................. 5
E-BUS Distribution Module to One Condenser Head Pressure Module Wiring ...........................................................................6
E-BUS Controller to One Condenser Head Pressure Module Wiring ..........................................................................................8
Stand-Alone Wiring ....................................................................................................................................................................10
Condenser Type Selection .........................................................................................................................................................10
SEQUENCE OF OPERATION ........................................................................................................................... 11
Inputs and Outputs ..................................................................................................................................................................... 11
Stand-Alone Input Commands ..................................................................................................................................................11
Input Commands (VCM-X Connection) ......................................................................................................................................12
Modes of Operation ....................................................................................................................................................................12
OPTIONS and ADDRESS Dipswitch Settings............................................................................................................................13
TROUBLESHOOTING ...................................................................................................................................... 15
Head Pressure Module Valve/Fan Position Troubleshooting .....................................................................................................15
Troubleshooting for Stand Alone Mode ......................................................................................................................................16
Pressure Transducer Troubleshooting ......................................................................................................................................17
Using LEDs to Verify Operation..................................................................................................................................................18
LED Diagnostics .........................................................................................................................................................................19
Other Checks .............................................................................................................................................................................19
APPENDIX FOR VERSION 1.06 AND EARLIER ............................................................................................... 20
VCM-X Connection Wiring .........................................................................................................................................................20
Stand-Alone Wiring ....................................................................................................................................................................21
Condenser Type Selection .........................................................................................................................................................22
Refrigerant Selection ..................................................................................................................................................................23
PART NUMBER CROSS REFERENCE TABLE
PART DESCRIPTION ORION
AAON
TULSA
AAON
COIL
One Condenser Head Pressure Module - Tulsa OE370-23-HP1C R74860 N/A
One Condenser Head Pressure Module - Coil OE370-23-HP1C-C N/A 30648
E-BUS Distribution Module OE365-23-EBD R82930 30312
VCM-X Modular E-BUS Controller OE332-23E-VCMX-MOD V07150 31422
VCM-X Modular Controller OE332-23-VCMX-MOD R90800 30553
VCM-X WSHP E-BUS Controller OE332-23E-VCMX-WSHP V07140 31423
VCM-X WSHP Controller OE332-23-VCMX-WSHP R90810 30526
www.aaon.com
2
WattMaster Controls Inc.
8500 NW River Park Drive · Parkville , MO 64152
Toll Free Phone: 866-918-1100
PH: (816) 505-1100 · FAX: (816) 505-1101 · E-mail: mail@wattmaster.com
Visit our web site at www.orioncontrols.com
Copyright August 2012 WattMaster Controls, Inc.
AAON Manual Part Number: R84490
®
AAON
is a registered trademark of AAON, Inc., Tulsa, OK.
WattMaster Form: AA-HP1C-TGD-01L
Neither WattMaster Controls, Inc. nor AAON
assumes any responsibility for errors or omissions in this document.
This document is subject to change without notice.
®
Technical Guide
One Condenser Head Pressure Module
Module Overview
Overview
NOTE: Software version 1.06 and earlier contain a few
differences from version 1.07 and later. For version
1.06 and earlier details, please see the Appendix.
The version number can be found on the upper right
of your module.
The One Condenser Head Pressure Module (OE370-23-HP1C) monitors
four individual head pressure transducers and controls the Condenser
Fan or Water Valve based on the highest of the four readings. If this is
a heat pump unit, the module is able to detect when the unit is in Heat
Pump Heating mode and will force the condenser signal to 100% until
it leaves this mode.
The One Condenser Head Pressure Module is designed to work standalone by using its OPTIONS Dip Switch to adjust the Head Pressure
setpoint.
Up to (2) One Condenser Head Pressure Modules can be daisy-chained
together and connected to the VCM-X Modular Controller or VCM-X
WSHP Controller using the E-BUS Distribution Module allowing the
One Condenser Head Pressure Module to receive setpoints from the
Controller. Up to (2) modules can also be daisy-chained together and
directly connected to the VCM-X Modular E-BUS or VCM-X WSHP
E-BUS Controller. See chart on page 2 for part numbers.
The One Condenser Head Pressure Module also provides a pulse width
modulation (PWM) signal or voltage output signal to control the condenser fan.
The One Condenser Head Pressure Module requires a 24 VAC power
connection with an appropriate VA rating.
Features
The One Condenser Head Pressure Module provides the following:
Can be operated stand alone or (2) can be daisy-chained
together and connected to a VCM-X Modular or VCM-X
WSHP Controller using the E-BUS Distribution Module to
E-BUS interface
Two modules can be daisy-chained together and be directly
connected to a VCM-X Modular E-BUS or VCM-X WSHP
E-BUS Controller
Monitors up to four individual head pressure transducers
Provides control of Condenser Output Signal based on the
highest reading of head pressure transducers
Capable of monitoring a Reverse Valve Signal
Forces Condenser Fan to 100% while in the Heat Pump
Heating Mode
NOTE: The One Condenser Head Pressure Module contains
no user-serviceable parts. Contact qualifi ed technical
personnel if your Module is not operating correctly.
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
BIN 1
BIN 2
BIN 3
COM
ADDRESS
www.aaon.com
One Condenser Head Pressure Module
A1
+5V
HEAD
SIG 1
PRESSURE
GND
TRANSDUCER #1/
A2
+5V
HEAD
SIG 2
PRESSURE
GND
TRANSDUCER #2
A3
+5V
HEAD
SIG 3
PRESSURE
GND
TRANSDUCER #3
A4
+5V
HEAD
SIG 4
PRESSURE
GND
TRANSDUCER #4
COND. ENABLE INPUT
BIN 1
REV. VLV. INPUT ENABLE
BIN 2
BIN 3
NOT USED
COM
COMMON
WattMaster Label
E-BUS
Connector
#LB102057-A
Figure 1: One Condenser Head Pressure Module
Technical Guide
Rev.: 1J
COND. ENABLE
REV. VLV. ENABLE
NOT USED
NOT USED
MAX @ 24 VAC
RATING IS 1AMP
RELAY CONTACT
RELAY COMMON
1COrion No.:OE370-23-HP
COND. SIGNAL
NOT USED
COND. FAN
COND. FAN
NOT USED
NOT USED
LED BLINK CODES
LED NAME STAT
BLINKS QTY. OF SENSORS INSTALLED
LED NAME
NO PROBLEMS 0
NO SENSORS DETECTED 1
HIGH HEAD PRESSURE DETECTED 2
LOW HEAD PRESSURE DETECTED 3
E-BUS
Connector
AAON No.:
R74860
GND
PWM1PWM1+
PWM2PWM2+
ALARM
GND
AO1
AO2
GND
R1
R2
R3
R4
RC
+24 VAC
AO1
AO2
GND
PWM1-
PWM1+
PWM2-
PWM2+
R1
R2
R3
R4
Rc
RELAYS
ANALOG
OPTIONS
ALARM
STAT
COMM
3
One Condenser Head Pressure Module
Installation & Wiring
Environmental Requirements
The One Condenser Head Pressure Module needs to be installed in an
environment that can maintain a temperature range between -30°F and
150°F and not exceed 90% RH levels (non-condensing).
0.18 DIA. TYP.
+5V
5.64
5.04
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
BIN 1
BIN 2
BIN 3
COM
ADDRESS
www.aaon.com
One Condenser Head Pressure Module
A1
+5V
HEAD
SIG 1
PRESSURE
GND
TRANSDUCER #1/
A2
+5V
HEAD
SIG 2
PRESSURE
GND
TRANSDUCER #2
A3
+5V
HEAD
SIG 3
PRESSURE
GND
TRANSDUCER #3
A4
+5V
HEAD
SIG 4
PRESSURE
GND
TRANSDUCER #4
COND. ENABLE INPUT
BIN 1
REV. VLV. INPUT ENABLE
BIN 2
BIN 3
NOT USED
COM
COMMON
E-BUS
Connector
Mounting
The One Condenser Head Pressure Module is housed in a plastic enclosure. It is designed to be mounted by using the 3 mounting holes in
the enclosure base. It is important to mount the module in a location
that is free from extreme high or low temperatures, moisture, dust, and
dirt. Be careful not to damage the electronic components when mounting the module.
See Figure 2 for Module dimensions (in inches).
5.71
0.29
R74860
AO1
AO2
GND
PWM1PWM1+
PWM2PWM2+
ALARM
GND
R1
R1
R2
R2
R3
R3
R4
R4
RC
Rc
RELAYS
ANALOG
AO1
AO2
GND
PWM1-
PWM1+
PWM2-
PWM2+
OPTIONS
ALARM
+24 VAC
STAT
COMM
WattMaster Label
#LB102057-A
Rev.: 1J
COND. ENABLE
REV. VLV. ENABLE
NOT USED
NOT USED
MAX @ 24 VAC
RATING IS 1AMP
RELAY CONTACT
RELAY COMMON
1COrion No.:OE370-23-HP
COND. SIGNAL
NOT USED
COND. FAN
COND. FAN
NOT USED
NOT USED
LED BLINK CODES
LED NAME STAT
BLINKS QTY. OF SENSORS INSTALLED
LED NAME
NO PROBLEMS 0
NO SENSORS DETECTED 1
HIGH HEAD PRESSURE DETECTED 2
LOW HEAD PRESSURE DETECTED 3
E-BUS
Connector
AAON No.:
GND
2.07
0.55
Figure 2: One Condenser Head Pressure Module Dimensions
4
4.14
Technical Guide
One Condenser Head Pressure Module
Installation & Wiring
Power Supply
The One Condenser Head Pressure Module requires a 24 VAC power
connection with an appropriate VA rating.
If you will be connecting the One Condenser Head Pressure Module to
any of the VCM-X series or VCM-X E-BUS series controllers, one of
the most important checks to make before powering up the system for
the fi rst time is to make sure that the controller is confi gured properly
for your application. Refer to the VCM-X Controller Technical Guide or
VCM-X Modular E-BUS Technical Guide for more information.
WARNING: Observe polarity! All boards must be wired
GND-to-GND and 24 VAC-to-VAC. Failure to
observe polarity could result in damage to the
boards.
Important Wiring Considerations
Please read carefully and apply the following information when wiring
the One Condenser Head Pressure Module:
1. To operate the One Condenser Head Pressure Module, you
must connect power to the 24 VAC input terminal block.
2. Each Pressure Transducer must have its own 18-gauge
shielded twisted pair cable. The Drain Wire must be the “Gnd”
signal for the transducer.
3. When the 2-10 VDC Analog Output is being used to control
the Condenser Fan Speed or Water Valve Percentage, the cable
must be 18-gauge shielded wire, and the Drain Wire must be
the “Gnd” signal.
4. Check all wiring leads at the terminal block for tightness.
Be sure that wire strands do not stick out and touch adjacent
terminals. Confi rm that all transducers required for your
system are mounted in the appropriate location and wired into
the correct terminals.
WARNING: Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
Technical Guide
5
One Condenser Head Pressure Module
Installation & Wiring
VCM-X Modular or VCM-X WSHP
to One Condenser Head Pressure
Module Wiring
The One Condenser Head Pressure Module connects to the E-BUS
Distribution Module using a modular HSSC cable. The One Condenser
Head Pressure Module requires a 24 VAC power connection with an
appropriate VA rating.
For Stand Alone Applications,
Connect To System Manager.
For Network Applications
Connect To Next Controller
And/Or MiniLink PD On Local Loop.
Local Loop
RS-485
9600 Baud
All Comm Loop Wiring Is
Straight Thru
T to T, R to R & SHLD to SHLD
See Individual Component
Wiring Diagrams For
Detailed Wiring Of Analog
Inputs And Outputs
AI1 SET AI2 SET AI3 SET
AI4 SET AI5 SET AI7 SET
Jumpers
AI1 SET AI2 SET AI3 SET
AI1
AI2
AI3
AI4
AI5
AI4 SET AI5 SET AI7 SET
AI7
Splice If Required
OE332-VCMX-WSHP
VCM-X WSHP Controller
The E-BUS Distribution Module connects to the VCM-X Modular
Controller, VCM-X WSHP Controller, VCM-X Expansion Module, or
12 Relay Expansion Module using the I
2
C port. See Figure 3 below for
wiring. Up to (2) One Condenser Head Pressure Modules can be used
per E-BUS Controller.
Any E-BUS Module can be connected to each of the four E-BUS Distribution Module’s output ports or can be daisy-chained together using
HSSC cables.
Note:
All Relay Outputs Are Normally
Open And Rated For 24 VAC Power
Only. 1 Amp Maximum Load.
R - 24VAC
G - Fan ON/OFF Only
Relay Output Contacts
R2 Thru R5 May Be UserConfigured For The Following:
1 - Heating Stages
2 - See Note 1 Below
3 - Warm-up Mode Command (VAV Boxes)
4 - Reversing Valve (Air To Air Heat
Pumps)
5 - Reheat Control (Dehumidification)
6 - Exhaust Fan Interlock
7 - Preheater For Low Ambient Protection
8 - Alarm
9 - Override
10 - Occupied
11 - OA Damper
12 - Heat Wheel
Note: 1.) When Using the HP1C Module,
All Compressors Will Be Wired From the
Protection Module, Not the VCM-X
Controller.
2.) A Total Of 20 Relays AreAvailable By
Adding Relay Expansion Modules. All
Expansion Module Relay Outputs Are User
Configurable As Listed Above.
GND
Line Voltage
24VAC
Size Transformer For
Correct Total Load.
VCM-X Controller = 8 VA
Connect To Digital Room Sensor And/Or
Digital CO Sensor
2
Connect To
E-BUS
Distribution
Module
24 VAC
Line Voltage
GND
OE271
Static Pressure
Transducer
Connect FRP Tubing To High Pressure
Port (Bottom Tube) and Route To Static
Pressure Pickup Probe Located In Unit
Discharge. Leave Port Marked “Lo” Open
To Atmosphere
Warning:
24 VAC Must Be Connected So That All Ground
Wires Remain Common. Failure To Do So Will
Result In Damage To The Controllers.
Connect To E-BUS Distribution Module or
Expansion Module(s)
(When Used)
Figure 3: VCM-X WSHP Controller to One Condenser Head Pressure Module Wiring Diagram
6
Technical Guide
One Condenser Head Pressure Module
If using a spliced terminal connection for longer runs, one module can be
connected to the E-BUS Distribution Module and any additional modules
would be daisy-chained to the fi rst module. For more information, refer
to the E-BUS Distribution Module Technical Guide.
NOTE: Contact Factory for the correct HSSC cable length for
your application. Cables are available in ¼, ½, 1, 2, 3,
4, and 5 Meter lengths and 100 and 150 Foot lengths.
OE365-23-EBD E-BUS
Distribution Module
YS102308
REV 1
I2CTO COMM
DIST. BOARD
OUTPUT
+COMM
SHLD
-COMM
GND
+VDC
INPUT
+COMM
SHLD
-COMM
GND
24VAC
GND
PWR
WARNING!!
Observe Polarity! All
boards must be wired with
GND-to-GND and 24 VACto-24 VAC. Failure to
observe polarity could
result in damage to the
boards.
485 DRV
Modular Cable
Connect To
VCM-X WSHP Controller,
VCM-X Modular Controller,
or SA Controller
Head Pressure Transducers
0 - 667 PSI
(One Per Refrigerant Circuit)
Set ADDRESS Dip
Switch 1 to ON for
Water Cooled or to
OFF for Air Cooled.
Currently showing
OFF for Air Cooled.
Set ADDRESS Dip
Switch 2 to OFF on all
communicating
applications unless it
is intended to be the
Second Head
Pressure Module on a
system. If set to ON, it
will not communicate.
Currently showing
OFF.
Set ADDRESS Dip
Switch 4 to OFF to
make reversing valve
"ON to Heat / OFF to
Cool” Set to ON to
make reversing valve
“ON to Cool / OFF to
Heat. Currently
showing OFF.
Installation & Wiring
WARNING: Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
One Condenser Head Pressure Module
+V
RD
WH
BK
RD
WH
BK
RD
WH
BK
RD
WH
BK
GND
GND
GND
GND
SIG
+V
SIG
+V
SIG
+V
SIG
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
BIN 1
BIN 2
BIN 3
COM
ADDRESS
PWR
HSSC Cable
Connect To E-BUS
Distribution Module
OE370-23-HP1C
www.aaon.com
MAX @ 24 VAC
RATING IS 1AMP
A1
HEAD
PRESSURE
TRANSDUCER #1/
A2
HEAD
PRESSURE
TRANSDUCER #2
A3
HEAD
PRESSURE
TRANSDUCER #3
A4
HEAD
PRESSURE
TRANSDUCER #4
COND. ENABLE INPUT
REV. VLV. INPUTENABLE
NOTUSED
COMMON
WattMaster Label
#LB102057-A
Rev.: 1J
RELAYCONTACT
1COrion No.:OE370-23-HP
LEDNAME STAT
BLINKSQTY. OF SENSORS INSTALLED
LEDNAME
NOPROBLEMS 0
NOSENSORS DETECTED 1
HIGHHEAD PRESSURE DETECTED 2
LOWHEAD PRESSURE DETECTED 3
E-BUS
Connector
One Condenser Head Pressure Module
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
BIN 1
BIN 2
BIN 3
COM
E-BUS
Connector
COND. ENABLE
REV. VLV. ENABLE
NOTUSED
NOTUSED
RELAYCOMMON
COND. SIGNAL
NOTUSED
COND. FAN
COND. FAN
NOTUSED
NOTUSED
LED BLINK CODES
HSSC Cable
AAON No.:
R74860
GND
GND
PWM1PWM1+
PWM2PWM2+
ALARM
R1
R2
R3
R4
RC
AO1
AO2
GND
GND
+24VAC
24 VAC
R1
R2
R3
R4
Rc
RELAYS
ANALOG
AO1
AO2
GND
PWM1-
PWM1+
PWM2-
PWM2+
OPTIONS
ALARM
STAT
COMM
24 VAC Transformer
3 VA Minimum
R1
R2
COMM
ALL RELAYOUTPUTS
NOTE:
ARE
NORMALLY OPENAND
RATED FOR 24 VAC POWER
ONLY - 1AMP MAXIMUM LOAD
HVAC UNIT CONNECTIONS
CONDENSER AENABLE
REV. VALVE A ENABLE
Condenser
Signal
+
COM
VCM-X Modular or
VCM-X WSHP
Controller
Condenser Fan
ECM Motor
YELLOW
BLUE +24 OUT
OPTIONS Dip Switch
Setting Not Required
When Connected To
Line Voltage
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
Duty Cycle
+24 Volts
Figure 3, cont.: VCM-X WSHP Controller to One Condenser Head Pressure Module Wiring Diagram
Technical Guide
7
One Condenser Head Pressure Module
E-BUS Controller to One Condenser Head Pressure Module Wiring
VCM-X Modular E-BUS or VCM-X WSHP
E-BUS Controller to One Condenser
Head Pressure Module Wiring
Up to (2) One Condenser Head Pressure Modules can be daisy-chained
together and connected to the E-BUS Controller using a modular HSSC
cable. The One Condenser Head Pressure Module requires a 24 VAC
power connection with an appropriate VA rating. See Figure 4 below
for wiring.
OE370-23-HP1C
www.aaon.com
One Condenser Head Pressure Module
A1
+5V
HEAD
SIG 1
PRESSURE
GND
TRANSDUCER #1/
A2
+5V
HEAD
SIG 2
PRESSURE
GND
TRANSDUCER #2
A3
+5V
HEAD
SIG 3
PRESSURE
GND
TRANSDUCER #3
A4
+5V
HEAD
SIG 4
PRESSURE
GND
TRANSDUCER #4
COND. ENABLE INPUT
BIN 1
REV. VLV. INPUT ENABLE
BIN 2
BIN 3
NOT USED
COM
COMMON
WattMaster Label
E-BUS
Connector
#LB102057-A
Rev.: 1J
E-BUS
Connector
Head Pressure Transducers
(One Per Refrigerant Circuit)
Set ADDRESS Dip Switch 1
to ON for Water Cooled or to
OFF for Air Cooled. Currently
showing OFF for Air Cooled.
Set ADDRESS Dip Switch 2
to OFF on all communicating
applications unless it is
intended to be the Second
Head Pressure Module on a
system. If set to ON, it will
not communicate. Currently
showing OFF.
Set ADDRESS Dip Switch 4
to OFF to make reversing
valve "ON to Heat / OFF to
Cool” Set to ON to make
reversing valve “ON to Cool /
OFF to Heat. Currently
showing OFF.
0 - 667 PSI
+V
RD
SIG
WH
GND
BK
+V
RD
SIG
WH
GND
BK
+V
RD
SIG
WH
BK
GND
+V
RD
SIG
WH
BK
GND
WARNING!! Observe
Polarity! All boards must be
wired with GND-to-GND and
24 VAC-to-24 VAC. Failure to
observe polarity could result in
damage to the boards.
One Condenser Head Pressure Module
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
BIN 1
BIN 2
BIN 3
COM
ADDRESS
PWR
Any E-BUS Module can be connected to the E-BUS Controller’s E-BUS
port or can be daisy-chained together using HSSC cables.
NOTE: Contact Factory for the correct HSSC cable length for
your application. Cables are available in ¼, ½, 1, 2, 3,
4, and 5 Meter lengths and 100 and 150 Foot lengths.
NOTE:
ALL RELAY OUTPUTS
NORMALLY OPENAND
ARE
RATED FOR 24 VAC POWER
ONLY - 1AMP MAXIMUM LOAD
CONDENSER A ENABLE
REVERSING VALVE A ENABLE
HVAC UNIT CONNECTION
Condenser
COND. ENABLE
REV. VLV. ENABLE
NOT USED
NOT USED
MAX @ 24 VAC
RATING IS 1AMP
RELAYCONTACT
RELAYCOMMON
AAON No.:
1COrion No.:OE370-23-HP
COND. SIGNAL
NOT USED
GND
COND. FAN
COND. FAN
NOT USED
NOT USED
LED BLINK CODES
LED NAME STAT
BLINKSQTY. OF SENSORS INST ALLED
LED NAME
NOPROBLEMS 0
NOSENSORS DETECTED 1
HIGHHEAD PRESSURE DETECTED 2
LOWHEAD PRESSURE DETECTED 3
R74860
GND
PWM1PWM1+
PWM2PWM2+
ALARM
GND
R1
R2
R3
R4
RC
AO1
AO2
GND
PWM1-
PWM1+
PWM2-
PWM2+
+24VAC
24 VAC
R1
R2
R3
R4
Rc
RELAYS
ANALOG
AO1
AO2
GND
OPTIONS
ALARM
STAT
COMM
Line Voltage
24 VAC Transformer
3 VA Minimum
R1
R2
COMM
YELLOW
BLUE +24 OUT
OPTIONS Dip Switch Setting Not
Required When Connected To
VCM-X Modular E-BUS or VCM-X
WSHP E-BUS Controller
Signal A
+
COM
Condenser Fan
ECM Motor
Duty Cycle
+24 Volts
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
HSSC Cable
HSSC Cable
Connect To VCM-X E-BUS
Controller or VCM-X WSHP E-BUS Controller
Figure 4: VCM-X E-BUS Controller to Two Condenser Head Pressure Module Wiring Diagram
8
Technical Guide
One Condenser Head Pressure Module
E-BUS Controller to One Condenser Head Pressure Module Wiring
WARNING: Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
For Stand Alone Applications,
Connect To System Manager. For Network
Applications Connect To Next Controller
And/Or MiniLink PD On Local Loop.
Local Loop
RS-485
9600 Baud
All Comm Loop Wiring Is
Straight Thru
T to T, R to R & SHLD to SHLD
HSSC Cable Connect To
VCM-X E-BUS Port
See Individual
AI1 SET AI2 SET AI3 SET
AI4 SET AI5 SET AI7 SET
Component Wiring
Diagrams For
Detailed Wiring Of
Analog Inputs And
OE332-23E-VCMX-MOD
VCM-X Modular
E-BUS Controller
RS-485 COMMUNICATION LOOP. WIRE
“R” TO “R”, “T”TO “T” “SHLD” TO “SHLD”
VCM-X MODULAR E-BUS CONTROLLER
Orion No.:OE332-23E-VCMX-MOD-A
AI1 = SPC (SPACETEMPERATURE SENSOR)
= SAT(SUPPLY AIR TEMPERATURE SENSOR)
AI2
= RAT(RETURN AIR TEMPERATURE SENSOR)
AI3
= OAT(OUTDOOR AIR TEMPERATURE SENSOR)
AI4
= SUCTION PRESSURE SENSOR (FROM EXP. MODULE)
AI5
= SPACETEMPERATURE SENSOR SLIDE ADJUST
AI7
OR VOLTAGE RESETSOURCE
A01
= ECONOMIZER (2-10 VDC OUTPUT)
A02
= SUPPLYFAN VFD (0-10 VDC OUTPUT)
E-BUS
CONNECTOR
ANALOG INPUT
JUMPER
SETTINGS
THERM
LED NAME STATUS1 STATUS2
4-20mA
AI1
0-10V
NORMALOPERATION 0 1
0-5V
SATFAIL 1 2
THERM
OATFAIL 2 2
4-20mA
AI2
SPCFAIL 3 2
0-10V
0-5V
MODULEALARM 4 2
THERM
MECHC OOLFA IL 1 3
4-20mA
AI3
MECHHEAT FAIL 2 3
0-10V
0-5V
FANPROOF FAIL 3 3
THERM
DIRTYFILTER 4 3
4-20mA
AI4
EMERGENCYSHUTDOWN 5 3
0-10V
0-5V
LOWSAT 1 4
THERM
HIGHSAT 2 4
4-20mA
AI5
CONT.TEMP COOL FAIL 3 4
0-10V
CONT.TEMP HEAT FAIL 4 4
0-5V
PUSHBUTTON OVR 1 5
THERM
4-20mA
ZONEOVR 2 5
AI7
0-10V
OUTPUTFORCE ACTIVE 0 6
0-5V
ANALOG INPUTJUMPER SETTINGS
MUSTBE SET AS SHOWN FOR
PROPER OPERATION
WattMasterLabel
STATIC
#LB102073-01-A
PRESSURE
Rev.: 1A
EXPANSION
RELAYCONTACT
RATING IS 1AMP
MAX @ 24 VAC
LED BLINKCODES
24 VAC POWER ONLY
WARNING!POLARITY MUST BE OBSERVED
OR THE CONTROLLER WILLBE DAMAGED
2
IC
RELAY
COMMON
RELAY2
RELAY3
RELAY4
RELAY5
AAON No.:
FAN
V07150
2
IC DIGITAL
SENSOR
Note:
All Relay Outputs Are Normally Open And
Rated For 24 VAC Power Only.
1 Amp Maximum Load.
R - 24VAC
G - Fan ON/OFF Only
Relay Output Contacts
R2 Through R5 May Be User-Configured
For The Following:
1 - Heating Stages
2 - Cooling Stages
3 - Warm-up Mode Command (VAV Boxes)
4 - Reversing Valve (Air To Air Heat Pumps)
5 - Reheat Control (Dehumidification)
6 - Exhaust Fan Interlock
7 - Preheater For Low Ambient Protection
8 - Alarm
9 - Override
10 - Occupied
11 - OA Damper
12 - Heat Wheel
13 - Emergency Heat
Note: 1.) When Using the HP2C Module,
All Compressors Will Be Wired From the
Protection Module, Not the VCM-X Controller.
Note: A Total Of 20 Relays Are Available By
Adding Relay Expansion Modules. All
Expansion Module Relay Outputs Are User
Configurable As Listed Above.
GND
Line Voltage
24VAC
Size Transformer For Correct
Total Load.
VCM-X Controller = 8 VA
Jumpers
Splice If Required
OE271
Static Pressure
Transducer
Connect FRP Tubing To High Pressure
Port (Bottom Tube) and Route To Static
Pressure Pickup Probe Located In Unit
Discharge. Leave Port Marked “Lo” Open
To Atmosphere
Connect To
Expansion Module(s)
(When Used)
Connect To Digital Room Sensor And/Or
Digital CO Sensor
2
Warning:
24 VAC Must Be Connected So That All Ground
Wires Remain Common. Failure To Do So Will
Result In Damage To The Controllers.
Figure 4, cont.: VCM-X E-BUS Controller to Two Condenser Head Pressure Module Wiring Diagram
Technical Guide
9
One Condenser Head Pressure Module
Installation & Wiring
Stand-Alone Wiring
To operate the One Condenser Head Pressure Module as Stand Alone,
connect the Module to a 24 VAC power connection with an appropriate
VA rating. Up to two One Condenser Head Pressure Modules can be
connected to one HVAC unit. See Figure 5 for wiring.
Check all wiring leads at the terminal block for tightness. Be sure that
wire strands do not stick out and touch adjacent terminals. Confi rm that
all transducers required for your system are mounted in the appropriate
location and wired into the correct terminals.
OE370-23-HP1C
One Condenser Head Pressure Module
Head Pressure Transducers
0 - 667 PSI
(One Per Refrigerant Circuit)
+V
RD
SIG
WH
GND
BK
+V
RD
SIG
WH
GND
BK
+V
RD
SIG
WH
BK
GND
+V
RD
SIG
WH
BK
GND
CONDENSER ON/OFF (Y1 CALL)
REV. VALVE ENABLE (O CALL)
COM
Set ADDRESS Dip
Switch 1 to ON for
Water Cooled or to
OFF for Air Cooled.
Currently showing
OFF for Air Cooled.
ADDRESS
PWR
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
BIN 1
BIN 2
BIN 3
COM
www.aaon.com
One Condenser Head Pressure Module
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
COND. ENABLE INPUT
BIN 1
REV. VLV. INPUT ENABLE
BIN 2
BIN 3
NOT USED
COM
COMMON
E-BUS
Connector
A1
HEAD
PRESSURE
TRANSDUCER #1/
A2
HEAD
PRESSURE
TRANSDUCER #2
A3
HEAD
PRESSURE
TRANSDUCER #3
A4
HEAD
PRESSURE
TRANSDUCER #4
WattMaster Label
#LB102057-A
Rev.: 1J
RELAY CONTACT
E-BUS
Connector
Condenser Type Selection
As shown in Figure 5, set address dipswitch 1 to ON for water cooled
or to OFF for air cooled. Refer to pages 11-12 for further instructions.
NOTE:
ALL RELAY OUTPUTS
NORMALLY OPEN AND
ARE
RATED FOR 24 VAC POWER
- 1 AMP MAXIMUM LOAD
ONLY
HVAC UNIT CONNECTIONS
AAON No.:
R74860
GND
GND
AO1
AO2
GND
PWM1-
PWM1+
PWM2PWM2+
ALARM
GND
R1
R1
R2
R2
R3
R3
R4
R4
RC
Rc
AO1
AO2
GND
PWM1-
PWM1+
PWM2-
PWM2+
+24 VAC
RELAYS
ANALOG
ALARM
STAT
COMM
R1
R2
COMM
OPTIONS
CONDENSER A ENABLE
REVERSING VALVE A ENABLE
Condenser
Signal
+
COM
YELLOW
BLUE +24 OUT
OPTIONS Dipswitch
is Used for Setting
the Head Pressure
Setpoint if Not Using
Default Setpoint.
Condenser Fan
ECM Motor
Duty Cycle
+24 Volts
24 VAC
COND. ENABLE
REV. VLV. ENABLE
NOT USED
NOT USED
MAX @ 24 VAC
RATING IS 1AMP
RELAY COMMON
1COrion No.:OE370-23-HP
COND. SIGNAL
NOT USED
COND. FAN
COND. FAN
NOT USED
NOT USED
LED BLINK CODES
LED NAME STAT
BLINKS QTY. OF SENSORS INSTALLED
LED NAME
NO PROBLEMS 0
NO SENSORS DETECTED 1
HIGH HEAD PRESSURE DETECTED 2
LOW HEAD PRESSURE DETECTED 3
Set ADDRESS Dip
Switch 4 to OFF to
make reversing valve
"ON to Heat / OFF to
Cool”
Set to ON to make
reversing valve “ON
WARNING!!
Observe Polarity! All boards
must be wired with GND-to-GND
and 24 VAC-to-24 VAC. Failure
to observe polarity could result in
damage to the boards.
to Cool / OFF to Heat.
Currently showing
OFF.
Figure 5: One Condenser Head Pressure Module as Stand-Alone
10
Line Voltage
24 VAC Transformer
3 VA Minimum
Technical Guide
One Condenser Head Pressure Module
Sequence of Operation
Inputs and Outputs
The following inputs and outputs are available on the One Condenser
Head Pressure Module. See Table 1 below to reference the Input/
Output Map.
Binary Inputs
1 Condenser On/Off (24 VAC Wet Input)
2 Reversing Valve Enable (24 VAC Wet Input)
3 N/A
Binary Outputs
Condenser Enable Relay
1
(Dry Contact Output Rated for 24 VAC)
Reversing Valve Enable
2
(Dry Contact Output Rated for 24 VAC)
Analog Inputs
1 Head Pressure #1 (0-667 PSI Sensor)
2 Head Pressure #2 (0-667 PSI Sensor)
3 Head Pressure #3 (0-667 PSI Sensor)
4 Head Pressure #4 (0-667 PSI Sensor)
Analog Outputs
1 Condenser Signal (0-10 or 2-10 VDC)
2 N/A
PWM Output
1 ECM 142 PWM Output (0-100% Duty Cycle)
2 N/A
Stand-Alone Input Commands
Condenser On/Off
A 24 volt signal to Binary Input #1 initiates the Condenser Enable
function. Typically, the source for this signal is the “Y” call from the
thermostat calling for a compressor to run.
Reversing Valve Enable On/Off
A 24 volt signal to Binary Input #2 initiates the Reversing Valve has
been energized and initiates the Reversing Valve Enable On indication
function. Typically, the source for this signal is the “O” call from a
thermostat or other controller.
Head Pressure Setpoint
The Head Pressure Setpoint is set using the OPTIONS Dip Switches.
See Table 2. The Default Setpoint for an Air Cooled Condenser is 340
for 410-A refrigerant. The Default Setpoint for a Water Cooled Condenser is 235 for 410-A refrigerant. Set the OPTIONS Dip Switch to
0 if using these Default Settings. You must cycle power after setting
Dip Switch values.
NOTE: The only setpoint available for adjustment by the con-
tractor is the Head Pressure Setpoint. The rest of the
setpoints described can only be changed by the factory.
ADDRESS Dip Switch Settings Condenser Type
Selection
When using the OPTIONS Dip Switch to set the Head Pressure Setpoint,
you must also set the ADDRESS Dip Switch to designate the type of
condenser you are using.
Table 1: One Condenser Head Pressure Module
Inputs & Outputs
Technical Guide
Set ADDRESS Dip Switch 1 to ON for a Water Cooled Condenser or
to OFF for an Air Cooled Condenser.
If set to ON for a Water Cooled Condenser, the Analog Condenser Output
Signal will be 2-10 VDC for the Water Valve. If set to OFF for an Air
Cooled Condenser, the Analog Condenser Output Signal will be 0-10
VDC for the Condenser Fan.
You must cycle power after setting Dip Switch values. See Figure 5
for ADDRESS Dip Switch location and Table 3 for Setting information.
11
One Condenser Head Pressure Module
Sequence of Operation
Input Commands (VCM-X Connection)
Condenser On/Off
Instead of a hard wired input signal to the Condenser Enable input,
the VCM-X Modular or VCM-X WSHP Controller communicates
to the Module via E-BUS communications. This signal indicates the
compressor(s) are called to run and drives the Condenser On/Off function.
Reversing Valve Enable On/Off
As with the Condenser Signal On/Off function, the VCM-X Modular
or VCM-X WSHP Controller communicates to the Module via E-BUS
communications and signals that the reversing valve has been energized
and that heating has been enabled.
NOTE: When the term “ON” is used, it means there is either
24 VAC on the appropriate Binary Input or a call-to-
run signal is being received from the VCM-X Series
Controller or VCM-X E-BUS Series Controller. When
the term “OFF” is used, it means there is either 0 VAC
on the appropriate Binary Input or the call-to-run signal
from the VCM-X Modular Controller or VCM-X WSHP
Controller has been removed.
Sensor Reading Routine
Up to four Head Pressure Sensors can be monitored, but only the highest
reading is used for control. This is because the way the units are physically designed, the air from the condenser fan fl ows through ALL of the
condenser coils. As a result, if you modulate fans based on the highest
reading, you will have enough airfl ow for all of the condenser coils.
Modes of Operation
OFF Mode
The Head Pressure Control Board is in the OFF Mode when the Condenser Input Signal is “OFF”. In this mode, all relays are off, the Analog
Output is 0 VDC for an Air Cooled Condenser or 2 VDC for a Water
Cooled Condenser, and the PWM Output is 0% Duty Cycle.
Cooling Mode
If the Head Pressure Controller has been confi gured for the Reversing
Valve to be energized in the Cooling Mode and to Fail to the Heat Mode
(Dipswitch 4 is set ON), then the Head Pressure Controller will be in
the Cooling Mode when the Condenser Signal input is “ON” and the
Reversing Valve Enable Signal is “ON”. In this circumstance, the Reversing Valve Enable Relay Output will energize for indication purposes.
If the Head Pressure Controller has been confi gured for the Reversing
Valve to be energized in the Heating Mode and to Fail to the Cool Mode
(Dipswitch 4 is set OFF), then the Head Pressure Controller will be in
the Cooling Mode when the Condenser Signal input is “ON” and the
Reversing Valve Enable Signal is “OFF”.
The Condenser Enable Relay will energize to enable the Condenser Fan
or Water Valve. In a water system, the Water Flow Valve will start at
75% for 3 minutes. The Condenser Output Signal will then automatically adjust between 0 and 100% to maintain the desired Head Pressure
Setpoint. The Condenser Output Signal can be a 0-10 VDC, 2-10 VDC or
0-100% PWM signal provided by the appropriate output. Both outputs
mirror each other.
Heating Mode
If the Head Pressure Controller has been confi gured for the Reversing
Valve to be energized in the Cooling Mode and to Fail to the Heat Mode
(Dipswitch 4 is set ON), then the Head Pressure Controller will be in
the Heating Mode when the Condenser Signal input is “ON” and the
Reversing Valve Enable Signal is “OFF”.
If the Head Pressure Controller has been confi gured for the Reversing
Valve to be energized in the Heating Mode and to Fail to the Cool Mode
(Dipswitch 4 is set OFF), then the Head Pressure Controller will be in
the Cooling Mode when the Condenser Signal input is “ON” and the
Reversing Valve Enable Signal is “ON”. In this circumstance, the Reversing Valve Enable Relay Output will energize for indication purposes.
In this mode, the Condenser Output Signal will go to 100% and remain
there until it leaves the Heating Mode.
12
NOTE: The Reversing Valve Dipswitch 4 setting determines
whether the Reversing Valve Dipswitch 4 Relay is ON
to Heat / OFF to Cool or ON to Cool / OFF to Heat.
NOTE: The Reversing Valve Enable output is for indication only
and is not wired to anything.
Technical Guide
One Condenser Head Pressure Module
Sequence of Operation
OPTIONS Dip
Switch Settings
Binary Value R410-A R410-A
0 340 (DEFAULT) 235 (DEFAULT)
1 260 210
2 270 220
3 280 230
4 290 240
5 300 250
6 310 260
7 320 270
8 330 280
9 340 290
10 350 300
11 360 310
12 370 320
13 380 330
14 390 340
15 400 350
NOTE: You must cycle power after setting Dip Switch values.
Air Cooled Condenser Water Cooled Condenser
Head Pressure Setpoint
Table 2: OPTIONS Dip Switch/Head Pressure Setpoint Settings for Stand-Alone Operation
ADDRESS Dip Switch 1 Settings
Switch 1 Default SP Description of Default Head Pressure Setpoint
OFF 340 Air Cooled Condenser using R410-A Refrigerant
ON 235 Water Cooled Condenser using R410-A Refrigerant
Switch 1 determines Air or Water Cooled Condenser
NOTE: You must cycle power after setting Dip Switch values.
Table 3: ADDRESS Dip Switch Refrigerant and Condenser Type Settings
Technical Guide
13
One Condenser Head Pressure Module
Sequence of Operation
ADDRESS Dip Switch 2 Settings
Switch Description
Set to OFF if Using only (1) Head Pressure Module
OFF
ON
Table 4: ADDRESS Dip Switch Address Settings When Connected to VCM-X
or if this is Module 1 when Using (2) Head Pressure
Modules.
Set to ON if this is Module 2 when Using (2) Head
Pressure Modules.
ADDRESS Dip Switch 4 Settings
Switch Description
OFF Reversing Valve On to Heat / Off to Cool
ON Reversing Valve On to Cool / Off to Heat
Table 5: ADDRESS Dip Switch 4 Settings for Reversing Valve
14
Technical Guide
One Condenser Head Pressure Module
Troubleshooting
Head Pressure Module Valve/Fan
Position Troubleshooting
If confi gured for Water valve:
Aout Signal is 2 to 10 volts.
2 volts = 0% valve position or fully closed
10 volts = 100% valve position or fully open
PWM signal is not used for water valve but does modulate.
At Startup for cooling, valve will open to 75% or 8 volts for 3
minutes then will modulate to try to maintain head pressure
setpoint.
For heating, valve will open and stay at 100%
If confi gured for Air Condenser Fan:
Aout Signal is 0 to 10 volts.
Minimum fan speed is 1.5 volts. ( 15%)
Maximum fan speed is 10 volts. ( 100%)
Anything less than 1.5 volts the fan will be off.
PWM 0 volts = 100% fan speed
6 volts = 75% fan speed
12 volts = 50% fan speed
18 volts = 25% fan speed
20.4 volts = 15% fan speed
Above 20.4 volts = 0% fan speed
At Startup for cooling, fan will start at 100% for 3 minutes
and then will modulate to try to maintain head pressure
setpoint.
For heating, valve will open and stay at 100%
Safeties:
If head pressure signal is above 500 psig, fan will go to 100%
(high pressure safety).
If head pressure signal is below 1 psig, fan will go to 100%
(assuming bad sensor).
PWM signal is 0 to 100%
PWM+ (to ground) will always read 24 vdc.
PWM- (to ground) can be measured for volts dc and this
formula will tell you the percentage signal: (24 – measured
value)/24 (measured value = PWM- to ground)
Technical Guide
15
One Condenser Head Pressure Module
Troubleshooting
Troubleshooting for Stand Alone Mode
If you suspect or encounter general problems during operation of the One
Condenser Head Pressure Module while in Stand Alone Mode, follow
the Troubleshooting Flowchart in Figure 6 below.
Head Pressure Control
Troubleshooting Flowchart
(Stand Alone Mode)
Start Here
Yes
“STAT” LED
Blinking
No
Verify
Incoming
Power
No
Is
?
No
Is There
@ “PWR”
24VAC
Testpoint
Fan Speed
or Water Valve
Position Will
Be at
Condenser
Fan or
Water Valve
Operating?
No
“ERROR”
LED Blinking
?
Call WattMaster
Technical
Support
100%
No
Is
Is
Yes
Yes
Yes
Yes
?
Is
Heating Enable
Input
Active
BIN 2
High
Blinks
2
Is
“ERROR”
No
Is
# of
Sensors
No
?
LED
?
LED Blinking
Note: “STAT” LED
will blink the # of
Good sensors
connected
“STAT”
Yes
?
blinking correct
Check wiring
on all sensors
1 Blink =
None of the
Yes
Sensors are
Detected
Check wiring
on all sensors
Measure DC
Volts between
SIGx & GND for
all sensors
Compare readings
Call AAON
Technical
Support
to chart
=
Pressure on one
of the Sensors
(More than
500 PSI)
Check
Refrigerant
Charge on
All Circuits
3 Blinks =
Lo Pressure
On one of
the Sensors
Less than 35 PSI
Check
Refrigerant
Charge on
All Circuits
Measure DC
Volts between
&
Lower
Monitor DC
Volts on Aout 1.
Aout Voltage
should Modulate
Down to a Min
voltage of 0VDC
(See Sequence)
Pressure is
than Setpoint
Same
There will
be No
Change on
Aout 1
??
?
Higher
Monitor DC
Volts on Aout 1
Aout Voltage
Should Modulate
Up to a Max
Voltage of 10VDC
(See Sequence)
GND for
SIGx
All sensors
Compare readings
.
to chart
Call AAON
Technical
Support
Figure 6: One Condenser Head Pressure Module Troubleshooting Diagram
16
Technical Guide
One Condenser Head Pressure Module
Pressure Transducer Troubleshooting
If you suspect there is a problem with the Module related to pressure
transducer measurements, reference Table 6 below.
Pressure Sensor Chart
Voltage Pressure Voltage Pressure
0.5 0 2.6 350
0.6 17 2.7 367
0.7 33 2.8 384
0.8 50 2.9 400
0.9 67 3.0 417
1.0 83 3.1 434
1.1 100 3.2 450
1.2 117 3.3 467
1.3 133 3.4 484
1.4 150 3.5 500
1.5 167 3.6 517
1.6 183 3.7 534
1.7 200 3.8 550
1.8 217 3.9 567
1.9 233 4.0 584
2.0 250 4.1 600
2.1 267 4.2 617
2.2 283 4.3 634
2.3 300 4.4 650
2.4 317 4.5 667
2.5 334
Troubleshooting
Table 6: One Condenser Head Pressure Module
Transducer Chart
Technical Guide
17
One Condenser Head Pressure Module
Troubleshooting
Using LEDs to Verify Operation
The One Condenser Head Pressure Module is equipped with LEDs that
can be used to verify operation and perform troubleshooting. There are
LEDs for communication, operation modes, diagnostic codes, and relays.
The One Condenser Head Pressure Module has eight LEDs—one for
power, one for communications, one for operation status, one for alarms,
two for compressor relays, and two not currently used. See Figure 7 for
the LED locations. The LEDs associated with these inputs and outputs
allow you to see what is active without using a voltmeter.
Status LEDs
“COMM” - This LED will light up to indicate Communications with the
VCM-X Series Controller or VCM-X -BUS Series Controller. If Communications are established, the COMM LED will blink. You should
not see this LED light up in stand-alone mode, because there would
be no communications with the VCM-X Series Controller or VCM-X
E-BUS Series Controller.
“ALARM” - This is the diagnostic blink code LED. It will light up and
blink out diagnostic codes. See Table 7 below for Diagnostic Blink
Code descriptions. The blink code descriptions are also located on the
Module’s front cover.
No. of
Blinks
0 No Problems
1 No Sensors Detected
2 High Head Pressure Detected
3 Low Head Pressure Detected
Status
Module LEDs
“R1” - This LED will light up when the Condenser Fan or Water Valve
is enabled and will stay lit as long as the Condenser Fan or Water Valve
is active.
“R2” - This LED will light up when the Heating Enable is enabled and
will stay lit as long as the Heating Enable is active.
Table 7: ALARM LED Blink Codes
“STAT” - This is the status blink code LED. It will light up and fi rst
blink the address of the Module. It will then blink out the quantity of
sensors installed. See Table 8 below for Status Blink Code descriptions.
The blink code descriptions are also located on the Module’s front cover.
No. of
Blinks
Random Blinks Quantity of Sensors
Installed
Status
Table 8: STAT LED Blink Codes
18
Figure 7: LED Locations
Technical Guide
One Condenser Head Pressure Module
Troubleshooting
LED Diagnostics
“PWR” LED: When the One Condenser Head Pressure Module is
powered up, the PWR LED (located below the address switches) should
light up and stay on continuously. If it does not light up, check to be
sure that the power wiring is connected to the board, the connections
are tight, and the VCM-X Series Controller or VCM-X E-BUS Series
Controller is powered. If after making all these checks, the PWR LED
does not light up, the module is probably defective.
“COMM” LED: When the One Condenser Head Pressure Module is
powered up while in Stand Alone Mode, the COMM LED does not light
up. When the module is connected to the VCM-X Series Controller or
VCM-X E-BUS Series Controller, the COMM LED should light up, indicating Communications. Each time Communications are detected, this
LED should continuously blink on and off, for a half second. This LED
should never stop checking for a Communications signal. If it does not
light up, check to be sure that the power wiring is connected to the board,
the connections are tight, and the VCM-X Series Controller or VCM-X
E-BUS Series Controller is powered. If after making all these checks,
the COMM LED does not light up, the board is probably defective.
“STAT” LED: As previously described, when the module is fi rst pow-
ered up, the STAT LED will b
“ALARM” LED: As previously described, this LED will blink on and
off to indicate alarms and diagnostics.
link out the number of installed sensors
Other Checks
NOTE: The One Condenser Head Pressure Module contains
no user-serviceable parts. Contact qualifi ed technical
personnel if your module is not operating correctly.
Technical Guide
19
One Condenser Head Pressure Module
Appendix for Version 1.06 and Earlier
Version 1.06 and Earlier
Version 1.06 and earlier have several differences from version 1.07 and
later. Please refer to the Dipswitches in Figures 8 & 9 and the Tables
9 & 10 for detailed information.
OE370-23-HP1C-A
One Condenser Head Pressure Module
Head Pressure Transducers
(One Per Refrigerant Circuit)
0 - 667 PSI
RD
WH
BK
RD
WH
BK
RD
WH
BK
RD
WH
BK
Set ADDRESS Dip
Switch 1 to ON for
Water Cooled or to
OFF for Air Cooled.
Currently showing OFF
for Air Cooled.
ADDRESS Dip Switch
4 should always be set
to OFF to make
reversing valve "ON to
Heat / OFF to Cool”
Currently showing OFF.
+V
SIG
GND
+V
SIG
GND
+V
SIG
GND
+V
SIG
GND
PWR
ADDRESS
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
BIN 1
BIN 2
COM
www.aaon.com
One Condenser Head Pressure Module
+5V
HEAD
SIG 1
PRESSURE
GND
TRANSDUCER #1
+5V
HEAD
SIG 2
PRESSURE
GND
TRANSDUCER #2
+5V
HEAD
SIG 3
PRESSURE
GND
TRANSDUCER #3
+5V
HEAD
SIG 4
PRESSURE
GND
TRANSDUCER #4
COND. ENABLE
BIN 1
HEAT ENABLE
BIN 2
COM
COMMON
WattMaster Label
E-BUS
#LB102057-A
Connector
Rev.: 1F
VCM-X Connection
Version 1.06 and earlier do not utilize Dipswitch 2 when the module is
connected to a VCM-X Series Controller.
NOTE:
ALL RELAY OUTPUTS
NORMALLY OPEN AND
ARE
RATED FOR 24 VAC POWER
- 1 AMP MAXIMUM LOAD
ONLY
HVAC UNIT CONNECTION
AAON No.:
R74860
GND
GND
GND
PWM1PWM1+
PWM2PWM2+
ALARM
GND
R1
R1
R2
R2
R3
R3
R4
R4
RC
Rc
AO1
AO2
AO1
AO2
GND
PWM1-
PWM1+
PWM2-
PWM2+
+24 VAC
RELAYS
ANALOG
R1
CONDENSER A ENABLE
Condenser
COMM
Signal
+
COM
Condenser Fan
ECM Motor
+
COM
OPTIONS
ALARM
STAT
COMM
OPTIONS Dip Switch
Setting Not Required
When Connected To
VCM-X Modular or
VCM-X WSHP
Controller
24 VAC
Line Voltage
COND. ENABLE
HEAT ENABLE
NOT USED
NOT USED
MAX @ 24 VAC
RATING IS 1AMP
RELAY CONTACT
RELAY COMMON
1COrion No.:OE370-23-HP
COND. SIGNAL
NOT USED
COND. FAN
COND. FAN
NOT USED
NOT USED
LED BLINK CODES
LED NAME STAT
BLINKS QTY. OF SENSORS INSTALLED
LED NAME
NO PROBLEMS 0
NO SENSORS DETECTED 1
HIGH HEAD PRESSURE DETECTED 2
LOW HEAD PRESSURE DETECTED 3
E-BUS
Connector
24 VAC Transformer
HSSC Cable
3 VA Minimum
Connect To E-BUS
Distribution Module
or VCM-X E-BUS
Controller
WARNING!!
Observe Polarity! All boards must be
wired with GND-to-GND and 24 VAC-to24 VAC. Failure to observe polarity could
result In damage to the boards.
HSSC Cable
WattMaster-Approved
E-BUS Expansion Module(s)
Figure 8: Version 1.06 and Earlier One Condenser Head Pressure Module Wiring Diagram
(VCM-X Connection)
20
Technical Guide
Connect To Other
One Condenser Head Pressure Module
Appendix for Version 1.06 and Earlier
Stand-Alone Wiring
Versions 1.03 through 1.06 utilize Dipswitch 2 in stand-alone mode
for refrigeration selection. See Tables 9 & 10 for further information.
OE370-23-HP1C
One Condenser Head Pressure Module
Head Pressure Transducers
(One Per Refrigerant Circuit)
0 - 667 PSI
+V
RD
SIG
WH
GND
BK
+V
RD
SIG
WH
GND
BK
+V
RD
SIG
WH
BK
GND
+V
RD
SIG
WH
BK
GND
CONDENSER ON/OFF (Y1 CALL)
HEATING ENABLE (O CALL)
Set ADDRESS Dip Switch 1 to
ON for Water Cooled or to
OFF for Air Cooled. Currently
showing OFF for Air Cooled.
Set ADDRESS Dip Switch 2 to
OFF for R410-A Refrigerant or
to ON for R22 Refrigerant.
Currently showing OFF for
R410-A Refrigerant.
COM
PWR
ADDRESS
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
BIN 1
BIN 2
COM
www.aaon.com
One Condenser Head Pressure Module
+5V
HEAD
SIG 1
PRESSURE
GND
TRANSDUCER #1
+5V
HEAD
SIG 2
PRESSURE
GND
TRANSDUCER #2
+5V
HEAD
SIG 3
PRESSURE
GND
TRANSDUCER #3
+5V
HEAD
SIG 4
PRESSURE
GND
TRANSDUCER #4
COND. ENABLE
BIN 1
HEAT ENABLE
BIN 2
COM
COMMON
WattMaster Label
E-BUS
#LB102057-A
Connector
Rev.: 1F
COND. ENABLE
HEAT ENABLE
NOT USED
NOT USED
MAX @ 24 VAC
RATING IS 1AMP
RELAY CONTACT
RELAY COMMON
1COrion No.:OE370-23-HP
COND. SIGNAL
NOT USED
COND. FAN
COND. FAN
NOT USED
NOT USED
LED BLINK CODES
LED NAME STAT
BLINKS QTY. OF SENSORS INSTALLED
LED NAME
NO PROBLEMS 0
NO SENSORS DETECTED 1
HIGH HEAD PRESSURE DETECTED 2
LOW HEAD PRESSURE DETECTED 3
E-BUS
Connector
AAON No.:
R74860
GND
GND
AO1
AO2
GND
PWM1PWM1+
PWM2PWM2+
ALARM
GND
NOTE:
ALL RELAY OUTPUTS
NORMALLY OPEN AND
ARE
RATED FOR 24 VAC POWER
- 1 AMP MAXIMUM LOAD
ONLY
HVAC UNIT CONNECTION
R1
R2
R1
R2
R3
R3
R4
R4
RC
Rc
AO1
AO2
GND
PWM1-
PWM1+
PWM2-
PWM2+
+24 VAC
RELAYS
ANALOG
ALARM
STAT
COMM
R1
CONDENSER A ENABLE
Condenser
COMM
Signal
+
COM
Condenser Fan
ECM Motor
+
COM
OPTIONS
OPTIONS Dipswitch
is Used for Setting
the Head Pressure
Setpoint if Not Using
Default Setpoint.
24 VAC
ADDRESS Dip Switch 4
should always be set to OFF
to make reversing valve "ON
to Heat / OFF to Cool”
Currently showing OFF.
WARNING!!
Observe Polarity! All boards
must be wired with GND-to-GND
and 24 VAC-to-24 VAC. Failure
to observe polarity could result in
24 VAC Transformer
3 VA Minimum
Line Voltage
damage to the boards.
Figure 9: Version 1.06 and Earlier One Condenser Head Pressure Module Wiring Diagram (Stand-Alone)
Technical Guide
21
One Condenser Head Pressure Module
Appendix for Version 1.06 and Earlier
OPTIONS Dip
Switch Settings
Binary Value R410-A R22 R410-A R22
0 340 (DEFAULT) 200 (DEFAULT) 235 (DEFAULT) 145 (DEFAULT)
1 260 160 210 110
2 270 170 220 120
3 280 180 230 130
4 290 190 240 140
5 300 200 250 150
6 310 210 260 160
7 320 220 270 170
8 330 230 280 180
9 340 240 290 190
10 350 250 300 200
11 360 260 310 210
12 370 270 320 220
13 380 280 330 230
14 390 290 340 240
15 400 300 350 250
NOTE: R22 refrigerant can only be used with the One Condenser Head Pressure Module versions 1.03 to 1.06.
You must cycle power after setting Dip Switch values.
Air Cooled Condenser Water Cooled Condenser
Head Pressure Setpoint
Table 9: OPTIONS Dip Switch/Head Pressure Setpoint Settings for Stand-Alone Operation
22
Technical Guide
One Condenser Head Pressure Module
Appendix for Version 1.06 and Earlier
ADDRESS Dip Switch 1 & 2 Settings
Switch 1 Switch 2 Default SP Description of Default Head Pressure Setpoint
OFF OFF 340 Air Cooled Condenser using R410-A Refrigerant
OFF ON 200 Air Cooled Condenser using R22 Refrigerant
ON OFF 235 Water Cooled Condenser using R410-A Refrigerant
ON ON 145 Water Cooled Condenser using R22 Refrigerant
Switch 1 determines Air or Water Cooled Condenser
Switch 2 determines R410-A or R22 refrigerant
NOTE: R22 refrigerant can only be used with the One Condenser Head Pressure Module versions 1.03 to 1.06.
You must cycle power after setting Dip Switch values.
Table 10: ADDRESS Dip Switch Refrigerant and Condenser Type Settings for Stand-Alone Operation
Technical Guide
23
www.aaon.com
2425 So. Yukon Ave • Tulsa, OK 74107-2728
Ph: (918) 583-2266 • Fax: (918) 583-6094
AAON® Manual Part No. R84490
WattMaster Manual Form No: AA-HP1C-TGD-01L
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