LED BLINK CODES
LED NAME STATUS
OFF MODE 1
COOLING MODE 2
HEATING MODE 3
LED NAME ALARM
LOW SUCTION PRESSURE 1
COMPRESSOR LOCKOUT 2
WATER FLOW FAILURE 3
LOW LEAVING WATER TEMP. 4
LED NAME PRES 1-4
SENSOR DETECTED ON
NO SENSOR DETECTED OFF
LOW SUCTION PRESSURE 1
COMPRESSOR LOCKOUT 2
LED BLINK CODES
LED NAME STATUS
OFF MODE 1
COOLING MODE 2
HEATING MODE 3
LED NAME ALARM
LOW SUCTION PRESSURE 1
COMPRESSOR LOCKOUT 2
WATER FLOW FAILURE 3
LOW LEAVING WATER TEMP. 4
LED NAME PRES 1-4
SENSOR DETECTED ON
NO SENSOR DETECTED OFF
LOW SUCTION PRESSURE 1
COMPRESSOR LOCKOUT 2
Tulsa
Factory Packaged Controls
Water Source
Heat Pump Module
Technical Guide
www.aaon.com
www.orioncontrols.com
WSHP Protection Module
WSHP Module
Orion No.: OE334-23-WPM
Orion No.: OE334-23-WPM-A
NON-DIGITAL COMPRESSORS
NON-DIGITAL COMP #1THRU #4
SUCT. PR. SENSOR
+5V
SUCTION
+5V
PRES 1=A1, PRES 2=A2
PRES
PRESSURE
PRES
PRES 3=B1, PRES 4=B2
GND
TRANSDUCERS
GND
+5 TO RED, PRES TO WHT & GND TO BLK
#1 thru #4
DIGITAL COMRESSORS
DIGITAL COMP #1THRU #4
+5V
NOT USED
PRES
+5V
PRES 1=A1, PRES 2=A2
NOT USED
GND
PRES
COPELAND CNTRLR P6
PRES 3=B1, PRES 4=B2
GND
COPELAND CNTRLR P5
+5 NOT USED, PRES TO P6 & GND TO P5
BIN 1
BIN 1
COMP.A1 ENABLE
COMP. 1 ENABLE
BIN 2
BIN 2
COMP.A2 ENABLE
COMP. 2 ENABLE
COMP. B1 ENABLE
COMP. 3 ENABLE
BIN 3
BIN 3
COMP. 4 ENABLE
COMP. B2 ENABLE
BIN 4
BIN 4
BIN 5
BIN 5
HEAT ENABLE
HEAT ENABLE
BIN 6
BIN 6
H2O POF #1
WATER POFA
BIN 7
BIN 7
H2O POF #2
WATER POF B
COMMON
COMMON
COM
COM
T1
T1
LEAVING WATER TEMP 1
LEAVING WATER TEMP A
T2
T2
LEAVING WATER TEMP 2
LEAVING WATER TEMP B
GROUND
GROUND
GND
GND
E-BUS
E-BUS
Connector
Connector
WattMaster Label
WattMaster Label
#LB102069-A
#LB102069-A
Rev.: 1B
Rev.: 1F
Connector
Connector
RELAY CONTACT RATING
RELAY CONTACT RATING
IS 1 AMP MAX @ 24 VAC
IS 1 AMP MAX @ 24 VAC
COMP.A1 ENABLE
COMP. #1 ENABLE
COMP.A2 ENABLE
COMP. #2 ENABLE
COMP. B1 ENABLE
COMP. #3 ENABLE
COMP. B2 ENABLE
COMP. #4 ENABLE
ALARM OUTPUT
RELAY COMMON
RELAY COMMON
AAON No.: R88350
AAON No.: R90680
LW: 36ºF HSP: 100 PSIG
DIGITAL COMP. A1, A2, B1, B2
SYSTEM A - CNTRLR C2
STAGE 1- COMP. A1/B1-
SYSTEM B - CNTRLR C2
STAGE 2 - COMP. A2/B2
CONNECT TO CNTLR C2 TERM.
E-BUS
E-BUS
AO1
A2O
GND
GND
R1
R1
R2
R2
R3
R3
R4
R4
R5
RC
RC
AO1
A2O
+24 VAC
+24 VAC
PART NUMBER CROSS REFERENCE TABLE
PART DESCRIPTION ORION AAON
VCM-X WSHP Module R410 OE334-23-WPM-A R88350
VCM-X WSHP Module R410 - 20% Glycol OE334-23-WPM-A20 R99750
VCM-X WSHP Module R410 - 25% Glycol OE334-23-WPM-A25 R88351
VCM-X WSHP Module R410 - 40% Glycol OE334-23-WPM-A40 R99760
VCM-X WSHP Module R22 OE334-23-WPM-22-A R90680
VCM-X WSHP E-BUS Controller OE332-23E-VCMX-WSHP-A V07140
VCM-X WSHP Controller OE332-23-VCMX-WSHP-A R90810
SA E-BUS Controller OE332-23E-SA-A V07160
SA Controller OE332-23-SA-A R96070
SA Expansion Module OE333-23-SA-A R96180
E-BUS Distribution Module OE365-23-EBD R82930
www.aaon.com
WattMaster Controls Inc.
8500 NW River Park Drive · Parkville , MO 64152
Toll Free Phone: 866-918-1100
PH: (816) 505-1100 · FAX: (816) 505-1101 · E-mail: mail@wattmaster.com
Visit our web site at www.orioncontrols.com
WattMaster Form : AA-WHP-T-TGD-01J
Copyright August 2011 WattMaster Controls, Inc.
AAON Manual Part Number: R89000
®
AAON
is a registered trademark of AAON, Inc., Tulsa, OK.
Neither WattMaster Controls, Inc. nor AAON
assumes any responsibility for errors or omissions in this document.
This document is subject to change without notice.
®
Water Source Heat Pump Module
Table of Contents
OVERVIEW ........................................................................................................................................................ 4
Overview ......................................................................................................................................................................................4
Features .......................................................................................................................................................................................4
INSTALLATION AND WIRING ........................................................................................................................... 5
Environmental Requirements .......................................................................................................................................................5
Mounting.......................................................................................................................................................................................5
Dimensions...................................................................................................................................................................................5
Power Supply ...............................................................................................................................................................................5
Important Wiring Considerations ..................................................................................................................................................6
Stand-Alone Wiring ......................................................................................................................................................................6
E-BUS Connection Wiring ............................................................................................................................................................7
Addressing ...................................................................................................................................................................................7
VCM-X Connection Wiring ...........................................................................................................................................................8
START-UP AND COMMISSIONING .................................................................................................................. 10
Unit Confi gurations .....................................................................................................................................................................10
SEQUENCE OF OPERATION ........................................................................................................................... 11
WSHP Module Setpoints ............................................................................................................................................................11
Stand-Alone Input Commands ..................................................................................................................................................12
Input Commands (VCM-X WSHP Connection) ..........................................................................................................................12
Modes of Operation ....................................................................................................................................................................13
TROUBLESHOOTING ...................................................................................................................................... 14
Safety Monitoring .......................................................................................................................................................................14
Temperature Sensor Testing ......................................................................................................................................................15
Pressure Transducer T roubleshooting .......................................................................................... ............................................16
Using LEDs to Verify Operation..................................................................................................................................................17
LED Diagnostics .........................................................................................................................................................................18
Technical Guide
3
Water Source Heat Pump Module
Module Overview
Overview
The Water Source Heat Pump Module monitors the compressors on an
AAON Water Source Heat Pump unit and can disable the compressors
based on low Suction Pressure, Leaving W ater Temperature, and W ater
Proof of Flow inputs. It also utilizes a Delay Timer to prevent the compressors from turning on at the same time.
There are two water-only versions of the Water Source Heat Pump
Module—the OE334-23-WPM-A which uses R-410A refrigerant and
the OE334-23-WPM-22-A which uses R-22 refrigerant.
There are also three R-410-A glycol versions—the OE334-23-WPM-A20
which uses 20% glycol—the OE334-23-WPM-A25 which uses 25%
glycol and the OE334-23-WPM-A40 which uses 40% glycol.
The Water Source Heat Pump Module can be used stand-alone. It can
also be connected to the VCM-X WSHP Controller (OE332-23-VCMX-
WSHP-A) or SA Controller (OE332-23-SA) using the E-BUS Distribution Module (OE365-23-EBD). This allows the W ater Source Heat Pump
Module to receive control data and alarms from the VCM-X WSHP or
SA Controller. Please note: The SA Controller only works with the
OE-334-WPM-A (410A version).
The Water Source Heat Pump Module requires a 24 VAC power connection with an appropriate VA rating.
Features
The Water Source Heat Pump Module provides the following:
Can be operated stand-alone or connected to a
VCM-X WSHP Controller or SA Controller using
the E-BUS Distribution Module to E-BUS interface
Capable of controlling digital compressors when
connected to the VCM-X WSHP Controller or SA
Controller
Monitors suction pressure, leaving water
temperature, and water proof of fl ow
Provides Delay Timer to prevent compressors
from turning on at the same time
NOTE: The Water Source Heat Pump Module contains no user-
serviceable parts. Contact qualifi ed technical personnel
if your Module is not operating correctly.
www.aaon.com
www.orioncontrols.com
WSHP Protection Module
WSHP Module
Orion No.: OE334-23-WPM
Orion No.: OE334-23-WPM-A
NON-DIGITAL COMPRESSORS
NON-DIGITAL COMP #1 THRU #4
SUCT. PR. SENSOR
+5V
SUCTION
+5V
PRES
GND
+5 TO RED, PRES TO WHT & GND TO BLK
PRES
+5V
GND
PRES
GND
+5 NOT USED, PRES TO P6 & GND TO P5
BIN 1
BIN 1
BIN 2
BIN 2
BIN 3
BIN 3
BIN 4
BIN 4
BIN 5
BIN 5
BIN 6
BIN 6
BIN 7
BIN 7
COM
COM
GND
GND
PRES 1=A1, PRES 2=A2
PRES
PRESSURE
PRES 3=B1, PRES 4=B2
TRANSDUCERS
GND
#1 thru #4
DIGITAL COMRESSORS
DIGITAL COMP #1 THRU #4
+5V
NOT USED
PRES 1=A1, PRES 2=A2
NOT USED
COPELAND CNTRLR P6
PRES 3=B1, PRES 4=B2
COPELAND CNTRLR P5
COMP. A1 ENABLE
COMP. 1 ENABLE
COMP. A2 ENABLE
COMP. 2 ENABLE
COMP. B1 ENABLE
COMP. 3 ENABLE
COMP. 4 ENABLE
COMP. B2 ENABLE
HEAT ENABLE
HEAT ENABLE
H2O POF #1
WATER POFA
H2O POF #2
WATER POF B
COMMON
COMMON
T1
T1
LEAVING WATER TEMP 1
LEAVING WATER TEMP A
T2
T2
LEAVING WATER TEMP 2
LEAVING WATER TEMP B
GROUND
GROUND
WattMaster Label
E-BUS
E-BUS
Connector
Connector
WattMaster Label
#LB102069-A
#LB102069-A
Rev.: 1B
Rev.: 1F
Connector
Connector
RELAY CONTACT RATING
RELAY CONTACT RATING
IS 1 AMP MAX @ 24 VAC
IS 1 AMP MAX @ 24 VAC
COMP. A1 ENABLE
COMP. #1 ENABLE
COMP. A2 ENABLE
COMP. #2 ENABLE
COMP. B1 ENABLE
COMP. #3 ENABLE
COMP. B2 ENABLE
COMP. #4 ENABLE
ALARM OUTPUT
RELAY COMMON
RELAY COMMON
AAON No.: R88350
AAON No.: R90680
LW: 36ºF HSP: 100 PSIG
DIGITAL COMP. A1, A2, B1, B2
SYSTEM A - CNTRLR C2
STAGE 1- COMP. A1/B1-
SYSTEM B - CNTRLR C2
STAGE 2 - COMP. A2/B2
CONNECT TO CNTLR C2 TERM.
LED BLINK CODES
LED BLINK CODES
LED NAME STATUS
LED NAME STATUS
OFF MODE 1
OFF MODE 1
COOLING MODE 2
COOLING MODE 2
HEATING MODE 3
HEATING MODE 3
LED NAME ALARM
LED NAME ALARM
LOW SUCTION PRESSURE 1
LOW SUCTION PRESSURE 1
COMPRESSOR LOCKOUT 2
COMPRESSOR LOCKOUT 2
WATER FLOWFAILURE 3
WATER FLOWFAILURE 3
LOW LEAVING WATER TEMP. 4
LOW LEAVING WATER TEMP. 4
LED NAME PRES 1-4
LED NAME PRES 1-4
SENSOR DETECTED ON
SENSOR DETECTED ON
NO SENSOR DETECTED OF F
NO SENSOR DETECTED OF F
LOW SUCTION PRESSURE 1
LOW SUCTION PRESSURE 1
COMPRESSOR LOCKOUT 2
COMPRESSOR LOCKOUT 2
E-BUS
E-BUS
WATTMASTER CONTROLS
R1
R1
R2
R2
R3
R3
R4
R4
R5
RC
RC
AO1
AO1
A2O
A2O
GND
GND
+24 VAC
+24 VAC
Y 102374 REV 0S
MADE IN USA
Figure 1: Water Source Heat Pump Module
4
Technical Guide
Water Source Heat Pump Module
Installation & Wiring
Environmental Requirements
The W ater Source Heat Pump 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).
Mounting
The W ater Source Heat Pump 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 (dimensions are in inches).
0.18 DIA. TYP. 3 PL.
www.aaon.com
www.orioncontrols.com
WSHP Protection Module
WSHP Module
Orion No.: OE334-23-WPM
Orion No.: OE334-23-WPM-A
NON-DIGITAL COMPRESSORS
NON-DIGITAL COMP#1 THRU #4
SUCT. PR. SENSOR
+5V
SUCTION
+5V
PRES 1=A1, PRES 2=A2
PRES
PRESSURE
PRES
PRES 3=B1, PRES 4=B2
GND
TRANSDUCERS
GND
+5 TO RED, PRES TO WHT & GNDTO BLK
#1 thru #4
5.64
DIGITAL COMRESSORS
DIGITAL COMP#1 THRU #4
+5V
NOT USED
PRES
+5V
PRES 1=A1, PRES 2=A2
NOT USED
GND
PRES
COPELAND CNTRLR P6
PRES 3=B1, PRES 4=B2
GND
COPELAND CNTRLR P5
+5 NOT USED, PRES TO P6 & GND TO P5
BIN 1
BIN 1
COMP.A1 ENABLE
COMP. 1 ENABLE
BIN 2
BIN 2
COMP.A2 ENABLE
COMP. 2 ENABLE
COMP. B1 ENABLE
COMP. 3 ENABLE
BIN 3
BIN 3
COMP. 4 ENABLE
COMP. B2 ENABLE
BIN 4
BIN 4
BIN 5
BIN 5
HEAT ENABLE
HEAT ENABLE
BIN 6
BIN 6
H2O POF #1
WATER POFA
BIN 7
BIN 7
H2O POF #2
WATER POF B
COMMON
COMMON
COM
COM
T1
T1
LEAVING WATER TEMP 1
LEAVING WATER TEMP A
T2
T2
LEAVING WATER TEMP 2
LEAVING WATER TEMP B
GROUND
GROUND
GND
GND
WattMaster Label
WattMaster Label
E-BUS
E-BUS
#LB102069-A
Connector
Connector
#LB102069-A
Rev.: 1B
Rev.: 1F
Power Supply
The Water Source Heat Pump Module requires a 24 VAC power connection with an appropriate VA rating.
If you will be connecting the Water Source Heat Pump Module to the
VCM-X WSHP Controller or SA Controller, one of the most important
checks to make before powering up the system for the fi rst time is to
make sure that the VCM-X WSHP Controller or SA Controller is con-
fi gured properly for your application. Refer to the VCM-X Controller
T echnical Guide or SA Contr oller T echnical 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.
RELAY CONTACT RATING
RELAY CONTACT RATING
IS 1 AMP MAX @ 24 VAC
IS 1 AMP MAX @ 24 VAC
COMP.A1 ENABLE
COMP. #1 ENABLE
COMP.A2 ENABLE
COMP. #2 ENABLE
COMP. B1 ENABLE
COMP. #3 ENABLE
COMP. B2 ENABLE
COMP. #4 ENABLE
ALARM OUTPUT
RELAY COMMON
RELAY COMMON
AAON No.: R88350
AAON No.: R90680
LW: 36ºF HSP: 100 PSIG
DIGITAL COMP. A1, A2, B1, B2
SYSTEM A - CNTRLR C2
STAGE 1- COMP. A1/B1-
SYSTEM B - CNTRLR C2
STAGE 2 - COMP. A2/B2
CONNECT TO CNTLR C2 TERM.
LED BLINK CODES
LED BLINK CODES
LED NAME STATUS
LED NAME STATUS
OFF MODE 1
OFF MODE 1
COOLING MODE 2
COOLING MODE 2
HEATING MODE 3
HEATING MODE 3
LED NAME ALARM
LED NAME ALARM
LOW SUCTIONPRESSURE 1
LOW SUCTIONPRESSURE 1
COMPRESSOR LOCKOUT 2
COMPRESSOR LOCKOUT 2
WATERFLOW FAILURE 3
WATERFLOW FAILURE 3
LOW LEAVING WATER TEMP. 4
LOW LEAVING WATER TEMP. 4
LED NAME PRES 1-4
LED NAME PRES 1-4
SENSOR DETECTED ON
SENSOR DETECTED ON
NO SENSOR DETECTED O FF
NO SENSOR DETECTED O FF
LOW SUCTIONPRESSURE 1
LOW SUCTIONPRESSURE 1
COMPRESSOR LOCKOUT 2
COMPRESSOR LOCKOUT 2
E-BUS
E-BUS
Connector
Connector
2.07
GND
GND
AO1
A2O
AO1
A2O
R1
R1
R2
R2
R3
R3
R4
R4
R5
RC
RC
+24 VAC
+24 VAC
WATTMASTER CONTROLS
0.29
5.05
Note: Height is 1.49 inches.
Figure 2: Water Source Heat Pump Module Dimensions
Technical Guide
0.56
4.14
5.83
5
Water Source Heat Pump Module
Installation & Wiring
Important Wiring Considerations
Please read carefully and apply the following information when wiring
the Water Source Heat Pump Module:
1. To operate the Water Source Heat Pump Module in StandAlone mode, you must connect power to the 24 VAC input
terminal block. Do not allow wire strands to stick out and
touch adjoining terminals. This could potentially cause a short
circuit.
2. The 1 to 5 VDC signals for the Compressor modulation need
to use 18-gauge shielded twisted pair cable, and the Drain wire
must be the GND signal.
3. All 24 VAC wiring must be connected so that all ground
wires remain common. Failure to follow this procedure can
result in damage to the module and connected devices.
Water Source Heat Pump
RD
WH
COMPRESSOR A1 SUCTION
PRESSURE TRANSDUCER
COMPRESSOR A2 SUCTION
PRESSURE TRANSDUCER
COMPRESSOR B1 SUCTION
PRESSURE TRANSDUCER
COMPRESSOR B2 SUCTION
PRESSURE TRANSDUCER
COMPRESSOR A1 ENABLE CONTACT
COMPRESSOR A2 ENABLE CONTACT
COMPRESSOR B1 ENABLE CONTACT
COMPRESSOR B2 ENABLE CONTACT
WATER POF SYSTEMA CONTACT
WATER POF SYSTEM B CONTACT
BK
RD
WH
BK
RD
WH
BK
RD
WH
BK
HEAT ENABLE CONTACT
BIN1
BIN2
BIN3
BIN4
BIN5
BIN6
BIN7
COM
T1
T2
GND
WSHP Protection Module
WSHP Module
Orion No.: OE334-23-WPM
Orion No.: OE334-23-WPM-A
NON-DIGITALCOMPRESSORS
NON-DIGITALCOMP #1 THRU #4
+5V
+5V
PRES
PRES
GND
GND
+5TO RED, PRES TO WHT & GND TO BLK
DIGITALCOMRESSORS
DIGITALCOMP #1 THRU #4
+5V
PRES
+5V
NOT USED
GND
PRES
COPELAND CNTRLR P6
GND
COPELAND CNTRLR P5
+5 NOTUSED, PRES TO P6 & GND TO P5
BIN 1
BIN 1
BIN 2
BIN 2
BIN 3
BIN 3
BIN 4
BIN 4
BIN 5
BIN 5
BIN 6
BIN 6
BIN 7
BIN 7
COM
COM
T1
T1
LEAVING WATERTEMP 1
LEAVING WATERTEMP A
T2
T2
LEAVING WATERTEMP 2
LEAVING WATERTEMP B
GROUND
GROUND
GND
GND
E-BUS
E-BUS
Connector
Connector
4. Be sure all modular wiring harness connectors are seated
fi rmly in their respective modular connectors on the circuit
board.
5. All wiring is to be in accordance with local and
national electrical codes and specifi cations.
6. 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.
Stand-Alone Wiring
To operate the Water Source Heat Pump Module as Stand Alone, connect the Module to a 24 VAC power connection with an appropriate VA
rating. See Figure 3 for wiring.
OE334-23-WPM
Module
www.aaon.com
www.orioncontrols.com
SUCT. PR. SENSOR
SUCTION
PRES 1=A1, PRES 2=A2
PRESSURE
PRES 3=B1, PRES 4=B2
TRANSDUCERS
#1 thru #4
NOT USED
PRES 1=A1, PRES 2=A2
PRES 3=B1, PRES 4=B2
COMP.A1 ENABLE
COMP. 1 ENABLE
COMP.A2 ENABLE
COMP. 2 ENABLE
COMP. B1 ENABLE
COMP. 3 ENABLE
COMP. 4 ENABLE
COMP. B2 ENABLE
HEATENABLE
HEATENABLE
H2O POF #1
WATER POFA
H2O POF #2
WATER POF B
COMMON
COMMON
WattMaster Label
WattMaster Label
#LB102069-A
#LB102069-A
Rev.: 1B
Rev.: 1F
RELAYCONTACT RATING
RELAYCONTACT RATING
IS 1 AMPMAX @ 24 VAC
IS 1 AMPMAX @ 24 VAC
COMP.A1 ENABLE
COMP. #1 ENABLE
COMP.A2 ENABLE
COMP. #2 ENABLE
COMP. B1 ENABLE
COMP. #3 ENABLE
COMP. B2 ENABLE
COMP. #4 ENABLE
ALARM OUTPUT
RELAYCOMMON
RELAYCOMMON
AAON No.: R88350
AAON No.: R90680
LW: 36ºF HSP: 100 PSIG
DIGITALCOMP. A1, A2, B1, B2
SYSTEMA - CNTRLR C2
STAGE 1- COMP.A1/B1-
SYSTEM B - CNTRLR C2
STAGE 2 - COMP.A2/B2
CONNECTTO CNTLR C2 TERM.
LED BLINKCODES
LED BLINKCODES
LED NAME STATUS
LED NAME STATUS
OFFMODE 1
OFFMODE 1
COOLINGMO DE 2
COOLINGMO DE 2
HEATINGMO DE 3
HEATINGMO DE 3
LED NAME ALARM
LED NAME ALARM
LOWSUCTION PRESSURE 1
LOWSUCTION PRESSURE 1
COMPRESSORLOCKOUT 2
COMPRESSORLOCKOUT 2
WATERFLOW FAILURE 3
WATERFLOW FAILURE 3
LOWLEAVING WATER TEMP. 4
LOWLEAVING WATER TEMP. 4
LED NAME PRES1-4
LED NAME PRES1-4
SENSORD ETECTED ON
SENSORD ETECTED ON
NOSENSOR D ETECTED OFF
NOSENSOR D ETECTED OFF
LOWSUCTION PRESSURE 1
LOWSUCTION PRESSURE 1
COMPRESSORLOCKOUT 2
COMPRESSORLOCKOUT 2
E-BUS
E-BUS
Connector
Connector
R
AO1
AO1
A2O
A2O
GND
GND
GND
24 VAC
E
NOTE: NORMALLY
ALL RELAY OUTPUTS ARE
OPEN AND RATED FOR 24 VAC POWER ONLY
- 1 AMP MAXIMUM LOAD
WATTMASTER CONTROLS
R1
R1
R2
R2
R3
R3
R4
R4
R5
RC
RC
R1
R2
R3
R4
R5
COMM
COMPRESSOR A1 ENABLE
COMPRESSOR A2 ENABLE
COMPRESSOR B1 ENABLE
COMPRESSOR B2 ENABLE
ALARM OUTPUT
HVAC UNIT CONNECTIONS
NOTE:
OUTPUTS ARE NOT USED ON
STAND ALONE APPLICATIONS
+24 VAC
+24 VAC
DIP SWITCH
NOT USED FOR
STAND ALONE
APPLICATION
LEAVING WATER TEMPERATURE
FOR SYSTEM A
LEAVING WATER TEMPERATURE
FOR SYSTEM B
Figure 3: Water Source Heat Pump Module as Stand-Alone
6
Technical Guide
Water Source Heat Pump Module
Installation & Wiring
E-BUS to Water Source Heat Pump
Module Wiring
The Water Source Heat Pump Module connects to the E-BUS Distribution Module using a modular HSSC cable. The Water Source Heat
Pump Module requires a 24 VAC power connection with an appropriate
VA rating.
The E-BUS Distribution Module connects to the VCM-X WSHP
Controller, VCM-X Expansion Module, SA Controller, SA Expansion
Module, or 12 Relay Expansion Module using the I2C port. See Figure
4 for wiring.
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.
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 1/4, 1/2,
1, 2, 3, 4, and 5 Meter lengths and 100 and 150 Foot
lengths.
WARNING: Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
Addressing
When the WSHP Module is connected to the E-BUS Distribution Module, set the WSHP Module’ s address to 1. Set the address consecutively
for each WSHP Module you are using.
NOTE: Address zero defaults to address 1.
Technical Guide
7
Water Source Heat Pump Module
Installation & Wiring
VCM-X WSHP or SA Controller to
Water Source Heat Pump Module
Wiring
The VCM-X WSHP Controller or SA Controller communicates with the
W ater Source Heat Pump Module using the E-BUS Distribution Module.
See Figure 4 for wiring details (VCM-X WSHP Controller shown).
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
T to T, R to R & SHLD to SHLD
AI1 SET AI2 SET AI3 SET
AI4 SET AI5 SET AI7 SET
Straight Thru
See Individual Component
Wiring Diagrams For
Detailed Wiring Of Analog
Inputs And Outputs
(OE332-23-WSHP-A)
VCM-X WSHP Controller
AI1 SET AI2 SET AI3 SET
AI1
AI2
AI3
AI4
AI5
AI4 SET AI5 SET AI7 SET
AI7
NOTE: When using the WSHP Module, all compressors will
be wired from the WSHP Module, not the VCM-X
WSHP Controller or SA Controller.
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 User Configured 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 - OADamper
12 - Heat Wheel
Note:
1.) When Using the WSHP Protection Module,
All Compressors Will Be Wired From the
Protection Module, Not the VCM-X Controller.
2.) ATotal Of 20 Relays Are Available ByAdding
Relay Expansion Modules. All Expansion
Module Relay Outputs Are User Configurable As
Listed Above.
GND
24VAC
Size Transformer For Correct
Total Load.
VCM-X Controller = 8 VA
Line Voltage
Connect To
E-BUS
Distribution
Module
24 VAC
GND
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
ToAtmosphere
Connect To E-BUS Distribution Module or
Expansion Module(s)
(When Used)
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 Digital Room Sensor And/Or
Digital CO Sensor
2
Figure 4: VCM-X WSHP Controller to Water Source Heat Pump Module Wiring Diagram
8
Line Voltage
Technical Guide
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 VAC-to-24 VAC. Failure to
observe polarity could result in
485 DRV
Modular Cable
Connect To
VCM-X WSHP Controller
LEAVING WATER TEMPERATURE
FOR SYSTEM A
Water Source Heat Pump Module
Installation & Wiring
CIRCUIT B2
SUCTION PRESSURE TRANSDUCER
BK
WH
RD
CIRCUIT B1
SUCTION PRESSURE TRANSDUCER
BK
WH
RD
CIRCUIT A2
SUCTION PRESSURE TRANSDUCER
BK
WH
RD
CIRCUIT A1
SUCTION PRESSURE TRANSDUCER
BK
WH
RD
NOTE:
ALL RELAY OUTPUTS
NORMALLY OPEN AND
ARE
RATED FOR 24 VAC POWER
ONLY
HVAC UNIT
CONNECTIONS
R1
COMP.A1 ENABLE
R2
COMP.A2 ENABLE
R3
COMP. B1 ENABLE
R4
COMP. B2 ENABLE
R5
COMM
AO1
AO2
ALARM OUTPUT
DIGITAL STG 1 (1.5-5V)
DIGITAL STG 2 (1.5-5V)
Set Address to 1
When Using One
WSHP Module And
Set Addresses
Consecutively if
Using More Than
One. Note: Address
Zero Defaults To
Address 1.
Line Voltage
3 VAMinimum
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.
WATER POFA
WATER POF B
BIN6
BIN7
COM
T1
T2
GND
OE334-23-WPM-A Water Source
Heat Pump Module
RELAYCONTACT RATING
RELAYCONTACT RATING
IS 1AMP MAX @ 24 VAC
IS 1AMP MAX @ 24 VAC
COMP.A1 ENABLE
COMP. #1 ENABLE
COMP.A2 ENABLE
Module(s)
COMP. #2 ENABLE
COMP. B1 ENABLE
COMP. #3 ENABLE
COMP. B2 ENABLE
COMP. #4 ENABLE
ALARM OUTPUT
RELAYCOMMON
RELAYCOMMON
AAON No.: R88350
AAON No.: R90680
LW: 36ºF HSP: 100 PSIG
DIGITALCOMP. A1, A2, B1, B2
SYSTEMA - CNTRLR C2
STAGE 1- COMP.A1/B1-
SYSTEM B - CNTRLR C2
STAGE 2 - COMP.A2/B2
CONNECTTO CNTLR C2 TERM.
LED BLINKCODES
LED BLINKCODES
LED NAME STATUS
LED NAME STATUS
OFFMODE 1
OFFMODE 1
COOLINGMODE 2
COOLINGMODE 2
HEATINGMODE 3
HEATINGMODE 3
LED NAME ALARM
LED NAME ALARM
LOWSUCTION PRESSURE 1
LOWSUCTION PRESSURE 1
COMPRESSORLOCKOUT 2
COMPRESSORLOCKOUT 2
WATERFLOW FAILURE 3
WATERFLOW FAILURE 3
LOWLEAVING WATER TEMP. 4
LOWLEAVING WATER TEMP. 4
LED NAME PRES 1-4
LED NAME PRES 1-4
SENSORD ETECTED ON
SENSORD ETECTED ON
NOSENSOR D ETECTED OFF
NOSENSOR D ETECTED OFF
LOWSUCTION PRESSURE 1
LOWSUCTION PRESSURE 1
COMPRESSORLOCKOUT 2
COMPRESSORLOCKOUT 2
E-BUS
E-BUS
Connector
Connector
HSSC Cable
www.aaon.com
www.orioncontrols.com
WSHP Protection Module
WSHP Module
Orion No.: OE334-23-WPM
Orion No.: OE334-23-WPM-A
NON-DIGITALCOMPRESSORS
NON-DIGITALCOMP #1 THRU #4
SUCT. PR. SENSOR
+5V
SUCTION
+5V
PRES 1=A1, PRES 2=A2
PRES
PRESSURE
PRES
PRES 3=B1, PRES 4=B2
GND
TRANSDUCERS
GND
+5TO RED, PRES TO WHT & GND TO BLK
#1 thru #4
DIGITALCOMRESSORS
DIGITALCOMP #1 THRU #4
+5V
NOT USED
PRES
+5V
PRES 1=A1, PRES 2=A2
NOT USED
GND
PRES
COPELAND CNTRLR P6
PRES 3=B1, PRES 4=B2
GND
COPELAND CNTRLR P5
+5 NOTUSED, PRES TO P6 & GND TO P5
BIN 1
BIN 1
COMP.A1 ENABLE
COMP. 1 ENABLE
BIN 2
BIN 2
COMP.A2 ENABLE
COMP. 2 ENABLE
COMP. B1 ENABLE
COMP. 3 ENABLE
BIN 3
BIN 3
COMP. 4 ENABLE
COMP. B2 ENABLE
BIN 4
BIN 4
BIN 5
BIN 5
HEATENABLE
HEATENABLE
H2O POF #1
WATER POFA
BIN 6
BIN 6
BIN 7
BIN 7
H2O POF #2
WATER POF B
COMMON
COMMON
COM
COM
T1
T1
LEAVING WATERTEMP 1
LEAVING WATERTEMP A
T2
T2
LEAVING WATERTEMP 2
LEAVING WATERTEMP B
GROUND
GROUND
GND
GND
WattMaster Label
WattMaster Label
E-BUS
E-BUS
#LB102069-A
#LB102069-A
Connector
Connector
Rev.: 1B
Rev.: 1F
HSSC Cable
Connect To Other
WattMaster-Approved
E-BUS Expansion
Y 102374 REV 0S
WATTMASTER CONTROLS
R1
R1
MADE IN USA
R2
R2
R3
R3
R4
R4
R5
RC
RC
AO1
AO1
A2O
A2O
GND
GND
+24 VAC
+24 VAC
GND
24 VAC
24 VAC Transformer
E
LEAVING WATER TEMPERATURE
FOR SYSTEM B
Figure 4, cont.: VCM-X WSHP Controller to Water Source Heat Pump Module Wiring Diagram
Technical Guide
9
Water Source Heat Pump Module
Start-Up & Commissioning
General
In order to have a trouble free start-up, it is important to follow a few
simple procedures. Before applying power for the fi rst time, it is very
important to run through a few simple checks.
One of the most important checks to make before powering up the system
for the fi rst time is to make sure that the VCM-X WSHP Controller or
SA Controller is confi gured properly for your application. Refer to the
VCM-X Controller Technical Guide or SA Controller Technical Guide
for more information.
A handheld Modular Service Tool, Modular System Manager, or System
Manager Touch Screen connected to the VCM-X WSHP Controller
or SA Controller will allow you to confi gure your application. Refer
to the VCM-X Operator’s Interfaces Technical Guide, SA Operator
Interfaces Technical Guide, or System Manager TS Technical Guide
for more information.
UNIT CONFIGURATIONS
SYSTEM A SYSTEM B
PERMUTATION
Comp A1 Comp A2 Comp B1 Comp B2
NOTE: The SA Controller does not utilize the System Manager
Touch Screen.
Check all wiring leads at the terminal block for tightness. Be sure that
wire strands do not stick out and touch adjacent terminals. Confi rm
that all sensors required for your system are mounted in the appropriate
location and wired into the correct terminals.
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.
VCM-X WSHP
CONFIGURATION
CONFIGURATION
SA
Relay 1 Relay 2 Relay 3 Relay 4
1 On/Off On/Off 2 Compressors
2 Digital On/Off
3 Digital Digital
4 On/Off On/Off On/Off On/Off 4 Compressors
5 Digital On/Off On/Off On/Off Not Available
6 Digital On/Off Digital On/Off
7 Digital Digital Digital Digital
In the Cooling Mode, the Compressors will stage in the following order:
Permutations 1, 2 & 3: Compressor A1 -> Compressor A2
Permutations 4: Compressor A1 -> Compressor B1 -> Compressor A2 -> Compressor B2
Permutations 6: Compressor A1 & Compressor B1 -> Compressor A2 -> Compressor B2
Permutations 7: Compressor A1 & Compressor B1 -> Compressor A2 & Compressor B2
In the Dehumidifi cation Mode, the Compressors will stage in the following order:
Permutation 4: Compressor A1 & Compressor B1 -> Compressor A2 -> Compressor B2
All other permutations in the Dehumidifi cation Mode stage as described in the Cooling Mode.
2 Compressors
Digital Compressor
2 Compressors
Full Digital
4 Compressors
Digital Compressor
4 Compressors
Full Digital
2 Compressors
Single Unit SA
2 Compressors
Single Unit SA
4 Compressors
Dual Unit SA
4 Compressors
Dual Unit SA
Table 1: Unit Confi gurations Chart
10
Technical Guide
Water Source Heat Pump Module
Sequence of Operation
General
The following inputs and outputs are available on the W ater Source Heat
Pump Module. See Table 2 below to reference the Input/Output Map.
Binary Inputs
1 Compressor A1 Enable (BIN 1)
2 Compressor A2 Enable (BIN 2)
3 Compressor B1 Enable (BIN 3)
4 Compressor B2 Enable (BIN 4)
5 Heat Enable (BIN 5)
6 Water Proof of Flow System A (BIN 6)
7 Water Proof of Flow System B (BIN 7)
Analog Inputs
1 Suction Pressure A1 (Pres 1)
2 Suction Pressure A2 (Pres 2)
3 Suction Pressure B1 (Pres 3)
4 Suction Pressure B2 (Pres 4)
5 Leaving Water Temperature System A (T1)
6 Leaving Water Temperature System B (T2)
Analog Outputs (1-5 VDC)
1 Digital Stage 1 (Compressors A1 & B1) (AOUT1)
2 Digital Stage 2 (Compressors A2 & B2) (AOUT2)
NOTE: Analog Outputs are not used on Stand
Alone Application
Relay Outputs (24 VAC)
1 Compressor A1 Enable Output (RLY1)
2 Compressor A2 Enable Output (RLY2)
3 Compressor B1 Enable Output (RLY3)
4 Compressor B2 Enable Output (RLY4)
5 Alarm Output (RLY5)
Table 2: Water Source Heat Pump Module Inputs &
Outputs
Water Source Heat Pump Module
Setpoints
The W ater Source Heat Pump Module setpoints are preset at AAON and
are based on the unit’s design as well as the type of coolant being used
in the water loop. See Tables 3 & 4 for default settings.
NOTE: These are default settings only. The setpoints may be
different based on the unit’s design and coolant being
used. The 6-digit R numbers in the tables are the AAON
part numbers located on the module’s label.
Water-Only Default Setpoints
Description
UNSAFE SUCTION 40 PSIG 20 PSIG
LOW SUCTION HEAT MODE 100 PSIG 57 PSIG
LOW SUCTION COOL MODE 100 PSIG 57 PSIG
LOW LEAVING WATER TEMP 37ºF 37ºF
R410-A
R88350
Table 3: Factory-Set Default Setpoints - Water Only
Glycol Default Setpoints
R410-A
Description
UNSAFE SUCTION 40 PSIG 40 PSIG 40 PSIG
LOW SUCTION HEAT
MODE
LOW SUCTION COOL
MODE
LOW LEAVING WATER
TEMP
20%
Glycol
R99750
77 PSIG 65 PSIG 45 PSIG
85 PSIG 85 PSIG 85 PSIG
23ºF 19ºF 0ºF
R410-A
25%
Glycol
R88351
R22
R90680
R410-A
40%
Glycol
R99760
Technical Guide
Table 4: Factory-Set Default Setpoints - Glycol
11
Water Source Heat Pump Module
Sequence of Operation
Stand-Alone Input Commands
Compressor On/Off
A 24 volt signal to Binary Inputs #1-4 initiates each Compressor’s On
function. The source for this signal would typically come from Y1 to
Y4 calls from the thermostat.
Heat Enable On/Off
A 24 volt signal on this input indicates the unit is in the Heating Mode.
Typically, the source for this signal is the “O” call from the thermostat.
Water Proof of Flow System On/Off
A 24 volt signal to Binary Inputs #6-7 indicates Water Proof of Flow
for each system.
Suction Pressure Analog Inputs
Sensors from Analog Inputs #1-4 correlate with the Suction Pressure of
each Compressor (250 PSI).
Leaving Water Temperature Thermistor Inputs
T1 correlates with Compressors A1 & A2 (RLY1 and RLY2). T2 correlates with Compressors B1 & B2 (RLY3 and RLY4).
Input Commands (VCM-X WSHP or SA
Connection)
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 WSHP or SA
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 WSHP or SA has
been removed.
Compressor On/Off
Instead of a physical input signaling the Compressor On/Off function,
the VCM-X WSHP Controller or SA Controller communications drives
the Compressor On/Off function.
Heat Enable On/Off
As with the Compressor On/Off function, the VCM-X WSHP or SA
Controller communicates to the Module that it is in Heat Mode.
12
Technical Guide
Water Source Heat Pump Module
Sequence of Operation
Modes of Operation
NOTE: See Unit Confi gurations Chart on page 10 for more
information about compressor staging.
Digital Stage 1 / Digital Stage 2
On units with two Digital Scroll Compressors, the fi rst compressor (A1)
will be designated as Digital Stage 1 and the second compressor (A2)
will be designated as Digital Stage 2.
On units with four Digital Scroll Compressors, there may be instances
where compressor numbers on the module do not correlate with the
mechanical compressors’ numbers. Therefore, Digital Stage 1 refers to
the fi rst set of Digital Scroll Compressors (A1/B1) that will stage on
together and Digital Stage 2 refers to the second set of Digital Scroll
Compressors (A2/B2) that will stage on together. Please refer to AAON’ s
wiring diagram for specifi c wiring of the unit.
Compressor Operation (Heat/Cool)
A compressor can energize if the following is true:
1. There is 24 VAC applied to the appropriate Binary Input for
the Compressor.
2. If two compressors are enabled simultaneously, a 5 second
staging delay will occur.
3. Suction Pressure is above the Low Suction Pressure Cooling
(Heating) Setpoint.
4. Proof of Flow for the appropriate water loop is made.
5. Leaving Water Temp is above the Leaving Water Safety
Setpoint (Heating Only).
6. A minimum off time of 3 minutes is met for that compressor.
NOTE: If the WSHP Module receives a signal on the Heat Enable
input, it will operate using the Heating Mode Setpoints.
Digital Scroll Compressor Control
When a Cool Signal is received, the WSHP Module will go into Cooling
Mode. At this point, Compressor A1 (and B1*) will energize and Digital
Stage 1 Analog Output will modulate as necessary to maintain the Supply Air Temperature at the Active Supply Air Setpoint that is broadcast
from the VCM-X WSHP Controller or SA Controller.
When Digital Stage 1 reaches 60%, a stage up timer is started and Digital
Stage 1 will continue to modulate up as necessary. If Digital Stage 1
stays above 60% for the stage up timer, Compressor A2 (and B2*) will
energize and both Digital Stage 1 and Digital Stage 2 outputs will go
to ½ of the current position of Digital Stage 1. For example, if Digital
Stage 1 is at 80% when Digital Stage 2 energizes, both systems will go
to 40% and start modulating together.
If both systems are energized and they go below 30% and the Supply Air
is below the Supply Air Setpoint by the Cooling Stage Window value,
the stage down timer is started. If the systems remain below 30% for
the duration of the stage down timer, Digital Stage 2 will deactivate and
Digital Stage 1 will go to 60%. Digital Stage 1 will stage down if it is
at 0% for the duration of the stage down timer.
* If confi gured for 4 modulating compressors.
Heat Pump Heating Mode
Heating Mode works the same as Cooling Mode except the Reversing
Valve is switched and the sequence is opposite. Compressors modulate
up when below the Heating Supply Air Setpoint and modulate down
when above the setpoint.
Dehumidifi cation Mode
Fixed Compressors Only
In the Dehumidifi cation Mode, if this unit has only fi xed compressors,
they will sequentially stage according to T able 1 on page 10 to maintain
the Suction Pressure Setpoint. Compressors A1 & B1 will stage on together fi rst followed sequentially by A2 & then B2. Stage Up and Stage
Down delays will apply.
Cooling Mode
NOTE: Control of digital compressor(s) is only available when
the WSHP Module is connected to the VCM-X WSHP
Controller or SA Controller.
Fixed Compressors Only
When a Cool Signal is received, the WSHP Module will go into Cooling Mode. If this unit has only fi xed compressors, they will sequentially
stage according to T able 1 on page 10, using Stage Up and Stage Down
delays to maintain the Supply Air Setpoint that is broadcast from the
VCM-X WSHP Controller or SA Controller.
Technical Guide
Digital Scroll Compressor Control
In Dehumidifi cation Mode, compressors will be controlled to maintain
the Suction Pressure T emperature Setpoint. Digital Stage 1—Compressor A1 (and B1*) will modulate up to 100% before Digital Stage 2—
Compressor A2 (and B2*) can be energized. When Digital Stage 2 is
energized, Digital Stage 1 will be locked at 100%.
* If confi gured for 4 modulating compressors.
Staging Delays
Staging Delays minimum run times and minimum off times are sent
from the VCM-X WSHP Controller or SA Controller.
13
Water Source Heat Pump Module
Troubleshooting
Safety Monitoring
Proof of Flow
There are separate inputs for System A and System B. System A provides water for Compressors A1 & A2 and System B provides water
for Compressors B1 & B2.
1. If there is a call for a compressor and there is no Proof of Flow
Input Enable:
• The module will wait up to 3 minutes to activate
the Proof of Flow Alarm LED(s) which will blink
the code indicating failure.
• Proof of Water Flow A will disable compressors A1
and A2.
• Proof of Water Flow B will disable compressors B1
and B2.
2. If the compressor(s) is (are) running and contact is opened for
2 seconds during Heat Pump Heating:
• Compressor(s) will be turned off.
• Proof of Water Flow A will disable compressors A1
and A2.
• Proof of Water Flow B will disable compressors B1
and B2.
3. If the compressor(s) are running and contact is opened for 2
seconds during Cooling:
• Proof of Flow Input will be ignored.
• No alarm will be generated.
Low Suction Pressure Detection
2. If any Compressor’s Suction Pressure falls below the Low
Suction Pressure Setpoint for longer than 1 minute a second
time within a two hour window, then the following will occur:
• That compressor will be locked out.
• Alarm LED will indicate a Compressor Lockout.
• Manual reset or change of mode (i.e., Cool to Heat)
must occur to reset back to normal operation.
Unsafe Suction Pressure Detection
If the Suction Pressure falls below the Unsafe Suction Setpoint for 5
seconds, the compressor will be locked out immediately and will not be
allowed to restart. You will need to reset the Power to restart the unit.
Low Leaving Water Temperature
NOTE: This safety monitoring is only performed in the Heat
Mode.
On the larger units, there are two separate condenser/water sections and
each section (water system) has its own Leaving Water Temperature
Sensor. Each sensor will only affect the compressors associated with
that condenser/water section. The description below describes System
A. System B works the same but will affect Compressors B1 & B2.
1. If the Leaving Water Temperature for System A falls below
setpoint, the following will occur:
• Compressor A2 will deactivate if active.
• Alarm LED will indicate Compressor A2 Low
Water Temp Shutoff.
• Compressor A2 will be locked out until the Leaving
temperature is 6 degrees above setpoint.
1. If any Compressor’s Suction Pressure falls below the Low
Suction Pressure Setpoint for longer than 1 minute, then the
following will occur:
• The compressor will turn off.
• Alarm LED will indicate Low Suction Pressure.
• Compressor will be enabled again after 10 minutes
if Suction Pressure rises above setpoint.
14
Revised 3/30/11
2. If the Leaving Water Temperature for System A remains below
setpoint for 1 minute or falls 3 degrees below setpoint, the
following will occur:
• Compressor A1 will deactivate.
• Alarm LED will indicate Compressor A1 & A2 Low
Water Temperature Shutoff.
• Both Compressors will be locked out until the
Leaving Temperature is 12 degrees above setpoint.
Technical Guide
Water Source Heat Pump Module
Troubleshooting
Temperature Sensor Testing
The following sensor voltage and resistance tables are provided to aid in
checking sensors that appear to be operating incorrectly. Many system
operating problems can be traced to incorrect sensor wiring. Be sure all
sensors are wired per the wiring diagrams in this manual.
If the sensors still do not appear to be operating or reading correctly,
check voltage and/or resistance to confi rm that the sensor is operating
correctly per the tables. Please follow the notes and instructions below
each chart when checking sensors.
Temperature – Resistance – Voltage for
Type III 10 K Ohm Thermistor Sensors
Temp
(ºF)
-10 93333 4.620
-5 80531 4.550
0 69822 4.474
5 60552 4.390
10 52500 4.297
15 45902 4.200
20 40147 4.095
25 35165 3.982
30 30805 3.862
35 27140 3.737
40 23874 3.605
45 21094 3.470
50 18655 3.330
52 17799 3.275
54 16956 3.217
56 16164 3.160
58 15385 3.100
60 14681 3.042
62 14014 2.985
64 13382 2.927
66 12758 2.867
68 12191 2.810
69 11906 2.780
70 11652 2.752
71 11379 2.722
72 11136 2.695
73 10878 2.665
Resistance
(Ohms)
Voltage @
Input (VDC)
Temperature – Resistance – Voltage for
Type III 10 K Ohm Thermistor Sensors
Temp
(ºF)
74 10625 2.635
75 10398 2.607
76 10158 2.577
78 9711 2.520
80 9302 2.465
82 8893 2.407
84 8514 2.352
86 8153 2.297
88 7805 2.242
90 7472 2.187
95 6716 2.055
100 6047 1.927
105 5453 1.805
110 4923 1.687
115 4449 1.575
120 4030 1.469
125 3656 1.369
130 3317 1.274
135 3015 1.185
140 2743 1.101
145 2502 1.024
150 2288 0.952
Resistance
(Ohms)
Voltage @
Input (VDC)
Table 5, cont.: Temperature/Resistance for Type III
10K Ohm Thermistor Sensors
Thermistor Sensor Testing Instructions
Use the resistance column to check the thermistor sensor while disconnected from the controllers (not powered).
Use the voltage column to check sensors while connected to powered
controllers. Read voltage with meter set on DC volts. Place the “-”
(minus) lead on GND terminal and the “+” (plus) lead on the sensor
input terminal being investigated.
If the voltage is above 5.08 VDC, then the sensor or wiring is “open.”
If the voltage is less than 0.05 VDC, then the sensor or wiring is
shorted.
Table 5: Temperature/Resistance for Type III 10K
Ohm Thermistor Sensors
Technical Guide
15
Water Source Heat Pump Module
Troubleshooting
OE275-01 Suction Pressure Transducer
T esting for R-22 & R-410A Refrigerant
The Evaporator Coil Temperature is calculated by converting the Suction Pressure to T emperature. The Suction Pressure is obtained by using
the OE275-01 Suction Pressure Transducer , which is connected into the
Suction Line of the Compressor.
Use the voltage column to check the Suction Pressure Transducer while
connected to the WSHP Module. Read voltage with a meter set on DC
volts. If the temperature/voltage or pressure/voltage readings do not
align closely with the chart, your Suction Pressure Transducer is probably defective and will need to be replaced.
See the OE275-01 Suction Pressure Transducer, Press pressures.ure,
Temperature, and Voltage Charts for R-22 and R-410A Refrigerant testing (Tables 6 & 7). The charts show a temperature range from 20°F to
80°F. For troubleshooting purposes, the DC Voltage readings are also
listed with their corresponding temperatures and
OE275-01 Suction Pressure Transducer Coil Pressure
– Temperature – Voltage Chart for R-22 Refrigerant
OE275-01 Suction Pressure Transducer Coil Pressure
– Temperature – Voltage Chart for R-410A Refrigerant
°F
Temperature
21.19 80.94 1.8 59.03 168.10 3.2
24.49 87.16 1.9 61.17 174.32 3.3
27.80 93.39 2.0 63.19 180.55 3.4
30.99 99.62 2.1 65.21 186.78 3.5
33.89 105.84 2.2 67.23 193.00 3.6
36.80 112.07 2.3 69.24 199.23 3.7
39.71 118.29 2.4 71.15 205.46 3.8
42.30 124.52 2.5 72.95 211.68 3.9
44.85 130.75 2.6 74.76 217.91 4.0
47.39 136.97 2.7 76.57 224.14 4.1
49.94 143.2 2.8 78.37 230.36 4.2
52.23 149.42 2.9 80.18 236.59 4.3
54.50 155.65 3.0
56.76 161.88 3.1
PSI
Pressure
Signal
DC Volts
°F
Temperature
PSI
Pressure
Signal
DC Volts
°F
Temperature
20.00 31.13 1.0 55.32 93.39 2.0
20.00 37.36 1.1 58.86 99.62 2.1
20.46 43.58 1.2 62.13 105.84 2.2
25.71 49.80 1.3 65.27 112.07 2.3
30.84 56.03 1.4 68.42 118.29 2.4
35.41 62.26 1.5 71.39 124.52 2.5
39.98 68.49 1.6 75.20 130.75 2.6
44.00 74.71 1.7 77.00 136.97 2.7
48.00 80.94 1.8 79.80 143.20 2.8
51.78 87.16 1.9 80.00 149.42 2.9
PSI
Pressure
Signal
DC Volts
°F
Temperature
Pressure
PSI
Signal
Table 6: Coil Pressure/Voltage/Temp for OE275-01
Suction Pressure Transducers - R-22 Refrigerant
Table 7: Coil Pressure/Voltage/Temp for OE275-01
Suction Pressure Transducers - R-410A Refrigerant
DC Volts
16
Technical Guide
Water Source Heat Pump Module
Using LEDs to Verify Operation
The WSHP 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 Module has
twenty LEDs—one used for power, one used for communications, one
used for operation status, one used for alarms, fi ve used for compressor
relays, four used for Suction Pressure Transducer status, and seven used
for Binary Input status. See Figures 5 and 6 for the LED locations. The
LEDs associated with these inputs and outputs allow you to see what is
active without using a voltmeter.
Operation Status LEDs
“STATUS” - 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 Mode of
Operation. See Table 8 below for Status Blink Code descriptions. The
blink code descriptions are also located on the Module’s front cover.
See Figure 5 for location.
Troubleshooting
No. of
Blinks
1 Off Mode
2 Cool Mode
3 Heat Mode
Status
Table 8: STATUS LED Blink Codes
“COMM” - This LED will light up to indicate Communications with
the VCM-X WSHP Controller or SA 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 WSHP Controller or SA Controller. See Figure
5 for location.
“ALARM” - This is the diagnostic blink code LED. It will light up and
blink out diagnostic codes. See Table 9 below for Diagnostic Blink
Code descriptions. The blink code descriptions are also located on the
Module’s front cover. See Figure 5 for location.
No. of
Blinks
1 Low Suction Pressure
2 Compressor Lockout
3 Water Flow Failure
4 Low Leaving Water Temp
Status
Figure 5: Operation Status LED Locations
Table 9: ALARM LED Blink Codes
Technical Guide
17
Water Source Heat Pump Module
Troubleshooting
Suction Pressure Transducer LEDs
“PRES 1-4” - There are LEDs for each of the Suction Pressure Transducers. Since each compressor has a sensor, these LEDs which are
located on the top left of the WSHP Module will give a better indication
of which compressor is causing an alarm. See T able 10 for PRES LED
status descriptions. See Figure 6 for locations.
No. of
Blinks
Solid On Sensor is Detected and is OK
Solid Off Sensor is Not Detected
1 Low Suction Pressure on this Compressor
2 Compressor is Locked Out
Table 10: PRES 1-4 LED Blink Codes
Status
LED Diagnostics
“POWER” LED: When the WSHP Module is powered up, the POWER
LED (located above 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 WSHP Controller or SA Controller is powered (if connected).
If after making all these checks, the POWER LED does not light up,
the module is probably defective.
“COMM” LED: When the WSHP 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 WSHP Controller or SA 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 WSHP Controller or SA Controller is powered. If after
making all these checks, the COMM LED does not light up, the board
is probably defective.
“ST A TUS” LED: As previously described, when the WSHP Module is
fi rst powered up, the STATUS LED will b
link out the Mode of Operation.
“ALARM” LED: As previously described, this LED will blink on and
off to indicate alarms and diagnostics.
NOTE: The WSHP Module contains no user-serviceable parts.
Contact qualifi ed technical personnel if your Module is
not operating correctly.
Figure 6: PRES 1-4 LED Locations
18
Technical Guide
Water Source Heat Pump Module
Notes
Technical Guide
19
www.aaon.com
2425 So. Yukon Ave • Tulsa, OK 74107-2728
Ph: (918) 583-2266 • Fax: (918) 583-6094
AAON® Manual Part No. R89000
WattMaster Manual Form No: AA-WHP-T-TGD-01J
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