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
Coil Products
Factory Packaged Controls
Water Source
Heat Pump Module
Technical Guide
www.aaon.com
www.orioncontrols.com
WSHP Module
Orion No.: OE334-23-WPM-C
NON-DIGITAL COMPRESSORS
SUCT. PR. SENSOR
+5V
PRES 1=A1, PRES 2=N/A
PRES
PRES 3=B1, PRES 4=N/A
GND
+5 TO RED, PRES TO WHT & GND TO BLK
DIGITAL COMRESSORS
+5V
NOT USED
PRES
PRES 1=A1, PRES 2=N/A
GND
PRES 3=B1, PRES 4=N/A
+5 NOT USED, PRES TO P6 & GND TO P5
BIN 1
COMP.A1 ENABLE
BIN 2
COMP.A2 ENABLE
COMP. B1 ENABLE
BIN 3
COMP. B2 ENABLE
BIN 4
BIN 5
COOL ENABLE
WATER POF
BIN 6
BIN 7
NOT USED
COMMON
COM
T1
LEAVING WATER TEMP
T2
NOT USED
GROUND
GND
E-BUS
Connector
WattMaster Label
#LB102069-B
Rev.: 1E
RELAY CONTACT RATING
IS 1 AMP MAX @ 24 VAC
COMP.A1 ENABLE
COMP.A2 ENABLE
COMP. B1 ENABLE
COMP. B2 ENABLE
ALARM OUTPUT
RELAY COMMON
AAON Coil No.: 30318
DIGITAL COMP. A1 & B1
CIRCUIT A -COMP. A1
CIRCUIT B - COMP. B1
CONNECT TO CNTLR C2 TERM.
E-BUS
Connector
AO1
A2O
GND
R1
R2
R3
R4
R5
RC
+24 VAC
PART NUMBER CROSS REFERENCE TABLE
PART DESCRIPTION ORION
WSHP Module R410 OE334-23-WPM-C 30318
WSHP Module R410 - 20% Glycol OE334-23-WPM-C20 30830
WSHP Module R410 - 40% Glycol OE334-23-WPM-C40 30831
VCM-X WSHP E-BUS Controller OE332-23E-VCMX-WSHP-C TBA
VCM-X WSHP Controller OE332-23-VCMX-WSHP-C 30526
VCM-X E-BUS Distribution Module OE365-23-EBD 30312
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-C-TGD-01J
Copyright December 2011 WattMaster Controls, Inc.
AAON
COIL
®
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 Water Temperature, and
W ater Proof of Flow inputs. It also utilizes a Delay T imer to prevent the
compressors from turning on at the same time.
There is one water-only version of the Water Source Heat Pump Module—the OE334-23-WPM-C which uses R-410A refrigerant.
There are also two 410-A glycol versions—the OE334-23-WPM-C20
which uses 20% glycol and the OE334-23-WPM-C40 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-VCMXWSHP-C) using the E-BUS Distribution Module (OE365-23-EBD-C).
This allows the W ater Source Heat Pump Module to receive control data
and alarms from the VCM-X WSHP Controller.
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 using the E-BUS
Distribution Module to E-BUS interface
Capable of controlling digital compressors when
connected to the VCM-X WSHP 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 Module
Orion No.: OE334-23-WPM-C
NON-DIGITAL COMPRESSORS
SUCT. PR. SENSOR
+5V
PRES
PRES
PRES 1=A1, PRES 2=N/A
PRES 3=B1, PRES 4=N/A
GND
+5 TO RED, PRES TO WHT & GND TO BLK
DIGITAL COMRESSORS
+5V
NOT USED
PRES 1=A1, PRES 2=N/A
GND
PRES 3=B1, PRES 4=N/A
+5 NOT USED, PRES TO P6 & GND TO P5
BIN 1
COMP. A1 ENABLE
BIN 2
COMP. A2 ENABLE
COMP. B1 ENABLE
BIN 3
COMP. B2 ENABLE
BIN 4
BIN 5
COOL ENABLE
BIN 6
WATER POF
BIN 7
NOT USED
COMMON
COM
T1
LEAVING WATER TEMP
T2
NOT USED
GROUND
GND
Connector
E-BUS
WattMaster Label
#LB102069-B
Rev.: 1E
RELAY CONTACT RATING
IS 1 AMP MAX @ 24 VAC
COMP. A1 ENABLE
COMP. A2 ENABLE
COMP. B1 ENABLE
COMP. B2 ENABLE
ALARM OUTPUT
RELAY COMMON
AAON Coil No.: 30318
DIGITAL COMP. A1 & B1
CIRCUIT A -COMP.A1
CIRCUIT B - COMP. B1
CONNECT TO CNTLR C2 TERM.
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
E-BUS
Connector
AO1
A2O
GND
R1
R2
R3
R4
R5
RC
+24 VAC
Y 102374 REV 0S
WATTMASTER CONTROLS
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 Module
Orion No.: OE334-23-WPM-C
NON-DIGITAL COMPRESSORS
SUCT. PR. SENSOR
+5V
PRES 1=A1, PRES 2=N/A
PRES
PRES 3=B1, PRES 4=N/A
GND
+5 TO RED, PRES TO WHT & GNDTO BLK
5.64
DIGITAL COMRESSORS
+5V
NOT USED
PRES
PRES 1=A1, PRES 2=N/A
GND
PRES 3=B1, PRES 4=N/A
+5 NOT USED, PRES TO P6 & GND TO P5
BIN 1
COMP.A1 ENABLE
BIN 2
COMP.A2 ENABLE
COMP. B1 ENABLE
BIN 3
COMP. B2 ENABLE
BIN 4
BIN 5
COOL ENABLE
WATER POF
BIN 6
BIN 7
NOT USED
COMMON
COM
T1
LEAVING WATER TEMP
T2
NOT USED
GROUND
GND
WattMaster Label
E-BUS
#LB102069-B
Connector
Rev.: 1E
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, 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 is confi gured properly for your application.
Refer to the VCM-X Controller 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.
RELAY CONTACT RATING
IS 1 AMP MAX @ 24 VAC
COMP.A1 ENABLE
COMP.A2 ENABLE
COMP. B1 ENABLE
COMP. B2 ENABLE
ALARM OUTPUT
RELAY COMMON
AAON Coil No.: 30318
DIGITAL COMP. A1 & B1
CIRCUIT A -COMP. A1
CIRCUIT B - COMP. B1
CONNECT TO CNTLR C2 TERM.
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
E-BUS
Connector
2.07
GND
AO1
A2O
R1
R2
R3
R4
R5
RC
+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.
OE334-23-WPM-C
Water Source Heat Pump
RD
WH
BK
CIRCUIT A
SUCTION PRESSURE TRANSDUCER
RD
WH
CIRCUIT B
SUCTION PRESSURE TRANSDUCER
BK
COMPRESSOR A1 ENABLE CONTACT
COMPRESSOR A2 ENABLE CONTACT
COMPRESSOR B1 ENABLE CONTACT
COMPRESSOR B2 ENABLE CONTACT
COOL ENABLE CONTACT
WATER POF CONTACT
BIN1
BIN2
BIN3
BIN4
BIN5
BIN6
COM
GND
T1
www.aaon.com
www.orioncontrols.com
WSHP Module
Orion No.: OE334-23-WPM-C
NON-DIGITALCOMPRESSORS
SUCT. PR. SENSOR
+5V
PRES 1=A1, PRES 2=N/A
PRES
PRES 3=B1, PRES 4=N/A
GND
+5TO RED, PRES TO WHT & GND TO BLK
DIGITALCOMRESSORS
+5V
NOT USED
PRES
PRES 1=A1, PRES 2=N/A
GND
PRES 3=B1, PRES 4=N/A
+5 NOTUSED, PRES TO P6 & GND TO P5
BIN 1
COMP.A1 ENABLE
BIN 2
COMP.A2 ENABLE
COMP. B1 ENABLE
BIN 3
COMP. B2 ENABLE
BIN 4
BIN 5
COOL ENABLE
BIN 6
WATER POF
BIN 7
NOT USED
COMMON
COM
T1
LEAVING WATERTEMP
T2
NOT USED
GROUND
GND
E-BUS
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.
WattMaster Label
#LB102069-B
Rev.: 1E
Module
COMP.A1 ENABLE
COMP.A2 ENABLE
COMP. B1 ENABLE
COMP. B2 ENABLE
AAON Coil No.: 30318
LED NAME STATUS
OFFMODE 1
COOLINGMODE 2
HEATINGMODE 3
LED NAME ALARM
LOWSUCTION PRESSUR E 1
COMPRESSORLOCKOUT 2
WATERFLOW FAILURE 3
LOWLEAVING WATER TEMP. 4
LED NAME PRES 1-4
SENSORDETECTED ON
NOSENSOR DET ECTED OFF
LOWSUCTION PRESSUR E 1
COMPRESSORLOCKOUT 2
E-BUS
Connector
R
RELAYCONTACT RATING
IS 1AMP MAX @ 24 VAC
ALARM OUTPUT
RELAYCOMMON
DIGITALCOMP. A1 & B1
CIRCUITA -COMP.A1
CIRCUIT B - COMP. B1
CONNECTTO CNTLR C2 TERM.
LED BLINKCODES
GND
E
R1
R2
R3
R4
R5
RC
AO1
A2O
GND
+24 VAC
24 VAC
WATTMASTER CONTROLS
NOTE: NORMALLY
ALL RELAY OUTPUTS ARE
OPEN AND RATED FOR 24 VAC POWER ONLY
- 1 AMP MAXIMUM LOAD
R1
R2
R3
R4
R5
COMM
COMPRESSOR A1 ENABLE OUTPUT
COMPRESSOR A2 ENABLE OUTPUT
COMPRESSOR B1 ENABLE OUTPUT
COMPRESSOR B2 ENABLE OUTPUT
ALARM OUTPUT
HVAC UNIT CONNECTIONS
NOTE:
OUTPUTS ARE NOT USED ON
STAND ALONE APPLICATIONS
DIP SWITCH
NOT USED FOR
STAND ALONE
APPLICATION
LEAVING WATER TEMPERATURE
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, 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 to Water Source Heat
Pump Module Wiring
The VCM-X WSHP Controller communicates with the Water Source
Heat Pump Module using the E-BUS Distribution Module. See Figure
4 for wiring details.
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
AI1
AI2
AI3
AI4
AI5
AI7
(OE332-23-WSHP-C)
VCM-X WSHP Controller
AI1 SET AI2 SET AI3 SET
AI4 SET AI5 SET AI7 SET
NOTE: When using the WSHP Module, all compressors will
be wired from the WSHP Protection Module, not the
VCM-X WSHP 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
Water Source Heat Pump Module
Installation & Wiring
CIRCUIT B
SUCTION PRESSURE TRANSDUCER
BK
WH
RD
CIRCUIT A
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
ALARM OUTPUT
AO1
DIGITAL STAGE 1 (1.5-5V)
AO2
DIGITAL STAGE 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
WATER POF
CONTACT
BIN6
COM
GND
OE334-23-WPM-C Water Source
Heat Pump Module
RELAYCONTACT RATING
IS 1 AMPMAX @ 24 VAC
COMP.A1 ENABLE
HSSC Cable
Module(s)
COMP.A2 ENABLE
COMP. B1 ENABLE
COMP. B2 ENABLE
ALARM OUTPUT
RELAYCOMMON
AAON Coil No.: 30318
DIGITALCOMP. A1 & B1
CIRCUITA -COMP.A1
CIRCUIT B - COMP. B1
CONNECTTO CNTLR C2 TERM.
LED NAME STATUS
OFFMODE 1
COOLINGMODE 2
HEATINGMODE 3
LED NAME ALARM
LOWSUCTION PRESSUR E 1
COMPRESSORLOCKOUT 2
WATERFLOW FAILURE 3
LOWLEAVING WATER TEMP. 4
LED NAME PRES 1-4
SENSOR DETECTED ON
NOSENSOR DET ECTED OFF
LOWSUCTION PRESSUR E 1
COMPRESSORLOCKOUT 2
E-BUS
Connector
LED BLINKCODES
E
www.aaon.com
www.orioncontrols.com
WSHP Module
Orion No.: OE334-23-WPM-C
NON-DIGITALCOMPRESSORS
SUCT. PR. SENSOR
+5V
PRES 1=A1, PRES 2=N/A
PRES
PRES 3=B1, PRES 4=N/A
GND
+5TO RED, PRES TO WHT & GND TO BLK
DIGITALCOMRESSORS
+5V
NOT USED
PRES
PRES 1=A1, PRES 2=N/A
GND
PRES 3=B1, PRES 4=N/A
+5 NOTUSED, PRES TO P6 & GND TO P5
BIN 1
COMP.A1 ENABLE
BIN 2
COMP.A2 ENABLE
COMP. B1 ENABLE
BIN 3
COMP. B2 ENABLE
BIN 4
BIN 5
COOL ENABLE
WATER POF
BIN 6
BIN 7
NOT USED
COMMON
COM
T1
LEAVING WATERTEMP
T2
NOT USED
GROUND
GND
WattMaster Label
E-BUS
#LB102069-B
Connector
T1
HSSC Cable
Rev.: 1E
Connect To Other
WattMaster-Approved
E-BUS Expansion
GND
R1
R2
R3
R4
R5
RC
AO1
A2O
GND
+24 VAC
24 VAC
Y 102374 REV 0S
WATTMASTER CONTROLS
MADE IN USA
24 VAC Transformer
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.
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 is
confi gured properly for your application. Refer to the VCM-X Controller
T echnical Guide for more information. A handheld Modular Service T ool,
Modular System Manager, or System Manager T ouch Screen connected
to the VCM-X WSHP Controller will allow you to confi gure your ap-
plication. Refer to the VCM-X Operator’s Interfaces Technical Guide or
System Manager TS Technical Guide for more information.
UNIT CONFIGURATIONS
CIRCUIT A CIRCUIT B
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.
PERMUTATION
1 Fixed N/A Fixed N/A 2 Compressors
2 Digital N/A Fixed N/A
3 Digital N/A Digital N/A
4 Fixed Fixed Fixed Fixed 4 Compressors
5 Digital Fixed Fixed Fixed
6 Digital Fixed Digital Fixed
The Compressors will stage in the following order:
Permutations 1, 2 & 3: Circuit A, 1
Permutations 4 & 5: Circuit A, 1st Compressor (A1) -> Circuit A, 2nd Compressor -> (A2)
Circuit B, 1
Permutations 6: Circuit A, 1st Compressor (A1) -> Circuit B, 1st Compressor (B1) ->
Circuit A, 2
st
Compressor (B1) -> Circuit B, 2nd Compressor (B2)
nd
Comp A1 Comp A2 Comp B1 Comp B2
Relay 1 Relay 2 Relay 3 Relay 4
st
Compressor (A1) -> Circuit B, 1st Compressor (B1)
Compressor (A2) -> Circuit B, 2nd Compressor (B2)
VCM-X WSHP
CONFIGURATION
2 Compressors
Digital Compressor
2 Compressors
Dual Digital
4 Compressors
Digital Compressor
4 Compressors
Dual Digital
Table 1: Unit Confi gurations
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 Circuit A, 1
2 Circuit A, 2
3 Circuit B, 1
4 Circuit B, 2
5 Cool Enable (BIN 5)
6 Water Proof of Flow (BIN 6)
1 Suction Pressure Circuit A (Pres 1)
2 Not Used
3 Suction Pressure Circuit B (Pres 3)
4 Not Used
5 Leaving Water Temperature (T1)
1 Circuit A - Digital Compressor A1 (AOUT1)
2 Circuit B - Digital Compressor B1 (AOUT2)
NOTE: Analog Outputs are not used on Stand Alone
Application
1 Circuit A, 1
2 Circuit A, 2
3 Circuit B, 1
4 Circuit B, 2
5 Alarm Output (RLY5)
st
Compressor Enable (BIN 1)
nd
Compressor Enable (BIN 2)
st
Compressor Enable (BIN 3)
nd
Compressor Enable (BIN 4)
Analog Inputs
Analog Outputs (1-5 VDC)
Relay Outputs (24 VAC)
st
Compressor Enable Output (RLY1)
nd
Compressor Enable Output (RLY2)
st
Compressor Enable Output (RLY3)
nd
Compressor Enable Output (RLY4)
Water Source Heat Pump Module
Setpoints
The Water Source Heat Pump Module setpoints are preset at AAON
and are based on the unit’s design and 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 type of coolant
being used. For fi eld adjustment of these setpoints, you
must contact the AAON factory.
Default Setpoints
Description Setpoint
UNSAFE SUCTION 40 PSIG
LOW SUCTION HEAT MODE 100 PSIG
LOW SUCTION COOL MODE 100 PSIG
LOW LEAVING WATER TEMP 37ºF
Table 3: Factory-Set Default Setpoints - Water Only
Glycol Default Setpoints
Description 20% Glycol 40% Glycol
UNSAFE SUCTION 40 PSIG 40 PSIG
LOW SUCTION HEAT MODE 77 PSIG 45 PSIG
Table 2: Water Source Heat Pump Module Inputs &
Outputs
Technical Guide
LOW SUCTION COOL MODE 85 PSIG 85 PSIG
LOW LEAVING WATER TEMP 23ºF 0ºF
Table 4: Factory-Set Default Setpoints - Glycol
Revised 12/28/11
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.
Cool Enable On/Off
A 24 volt signal on this input indicates the unit is in the Cooling Mode.
Typically, the source for this signal is the “O” call from the thermostat.
Water Proof of Flow Circuit On/Off
A 24 volt signal to Binary Input #6 indicates Water Proof of Flow for
each circuit.
Suction Pressure Analog Inputs
Sensors from Analog Inputs #1 & #3 correlate with the Suction Pressure of each Circuit (250 PSI). Pres 1 input correlates with Circuit A’s
1st and 2nd compressor. Pres 3 input correlates with Circuit B’s 1st and
2nd compressor. Suction Pressure Transducer is 0-250 psi.
Leaving Water Temperature Thermistor Inputs
T1 for Heating Mode measures the temperature of the leaving water to
prevent freezing of the coil.
Input Commands (VCM-X WSHP )
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. 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 has been removed.
Compressor On/Off
Instead of a physical input signaling the Compressor On/Off function,
the VCM-X WSHP Controller communications drives the Compressor
On/Off function.
Cool Enable On/Off
As with the Compressor On/Off function, the VCM-X Controller
communicates to the Module that it is in Heat Mode. On = Cool. Off
= Heat.
12
Technical Guide
Water Source Heat Pump Module
Sequence of Operation
Modes of Operation
NOTE: See Unit Confi gurations Chart on page 7 for more
information about compressor staging.
Compressor Operation (Heating and Cooling)
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 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 an off signal on the Cool
Enable input, it will operate using the Heating Mode
Setpoints.
Cooling Mode
If there are additional fi xed compressor stages and modulating Com-
pressors A1 and B1 have modulated together up to 100%, then after
a stage up delay, fi xed Compressor A2 will stage on while A1/B1 are
allowed to modulate. If A1/B1 again modulate up to 100%, then after
a stage up delay, fi xed compressor B2 will stage on while A1/B1 are
allowed to modulate.
Staging down will happen in the reverse order as just described if the
Supply Air Temperature falls below the Supply Air Temperature Setpoint by the Cooling Stage Window value and the stage down timer
has elapsed. After the fi xed compressors have staged off, or if there are
no fi xed compressors then the staging down of the digital compressors
A1 and B1 will continue as follows. If Compressors A1/B1 modulate
together down to 30% and the stage down timer elapses, Compressor B1
will deactivate and Compressors A1 will go to 60%. Compressors A1
will stage down if it is at 0% for the duration of the stage down timer.
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 Table 1 on page 7 to maintain
the Suction Pressure Setpoint. Stage Up and Stage Down delays will
apply.
NOTE: Control of digital compressor(s) is only available when
the WSHP Module is connected to the VCM-X WSHP
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 Table 1 on page 7, using Stage Up and Stage Down
delays to maintain the Supply Air Setpoint that is broadcast from the
VCM-X WSHP Controller .
Digital Scroll Compressor Control
When a Cool Signal is received, the WSHP Module will go into Cooling Mode. At this point, Compressor A1 will energize and modulate as
necessary to maintain the Supply Air Temperature at the Active Supply
Air Setpoint that is broadcast from the VCM-X Modular Controller.
When Compressor A1 reaches 60%, a stage up timer is started and will
continue to modulate up as necessary. If Compressor A1 stays above
60% for the stage up timer, Compressor B1 will energize and both
compressors will go to ½ of the current position of Compressor A1. For
example, if Compressor A1 is at 80% when Compressor B1 energizes,
both compressors will go to 40% and start modulating together.
Digital Scroll Compressor Control
In Dehumidifi cation Mode, the compressor(s) will modulate to maintain
the Suction Pressure T emperature Setpoint broadcast from the VCM-X
WSHP Controller. If there are two compressors, Compressor A1 will
modulate up to 100% before Compressor B1 can be energized. If Compressor B1 is energized, Compressor A1 will be locked at 100%.
If there are additional fi xed compressor stages and Compressor B1 has
modulated up to 100%, then after a stage up delay, fi xed Compressor A2
will stage on while B1 is allowed to modulate. If B1 again modulates
up to 100%, then after a stage up delay, fi xed compressor B2 will stage
on while B1 is allowed to modulate.
Stage down will again be the reverse as just described with Compressor
A1 being the last compressor to stage off.
Staging Delays
Staging Delays minimum run times and minimum off times are sent
from the VCM-X WSHP Controller.
Technical Guide
13
Water Source Heat Pump Module
Troubleshooting
Safety Monitoring
Proof of Flow
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.
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.
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
1. If any Circuit’s Suction Pressure falls below the Low Suction
Pressure Setpoint for longer than 1 minute, then the following
will occur:
Low Leaving Water Temperature
NOTE: This safety monitoring is only performed in the Heat
Mode.
1. If the Leaving Water Temperature falls below setpoint, the
following will occur:
• The last compressor will turn off.
• Alarm LED will indicate Compressor Low Water
Temp Shutoff.
• Last compressor will be locked out until the
Leaving temperature is 6 degrees above setpoint.
2. If the Leaving Water Temperature remains below setpoint for
1 minute or falls 3 degrees below setpoint, the following will
occur:
• All compressors will deactivate.
• Alarm LED will indicate Compressor Low
Water Temperature Shutoff.
• All compressors will be locked out until the
Leaving Temperature is 12 degrees above setpoint.
• The compressor(s) on that circuit will turn off.
• Alarm LED will indicate Low Suction Pressure.
• Compressor(s) will be enabled again after 10
minutes if Suction Pressure rises above setpoint.
2. If any Circuit’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:
• The compressor(s) on that circuit 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 circuit’s compressor will be locked out immediately and
will not be allowed to restart. You will need to reset the Power to restart
the unit.
14
Revised 12/28/11
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-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 , Pressure, T emperature,
and Voltage Chart for R-410A Refrigerant testing (Table 6). The chart
shows a temperature range from 20°F to 80°F . For troubleshooting purposes, the DC Voltage readings are also listed with their corresponding
temperatures and pressures.
OE275-01 Suction Pressure Transducer Coil Pressure
– Temperature – Voltage Chart for 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
Table 6: Coil Pressure/Voltage/Temp for OE275-01
Suction Pressure Transducers - R-410A Refrigerant
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
18 operational LEDs—one used for power, one used for communications, one used for operation status, one used for alarms, fi ve used for
compressor relays, two 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 7 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 7: STATUS LED Blink Codes
“COMM” - This LED will light up to indicate Communications with
the VCM-X WSHP 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. See Figure 5 for location.
“ALARM” - This is the diagnostic blink code LED. It will light up and
blink out diagnostic codes. See Table 8 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 8: ALARM LED Blink Codes
Technical Guide
17
Water Source Heat Pump Module
Troubleshooting
Suction Pressure Transducer LEDs
“PRES 1 & 3” - There are LEDs for two of the Suction Pressure
Transducers. Since each set of two compressors share 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 Table
9 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 9: PRES 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 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, 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
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
“ALARM” LED: As previously described, this LED will blink on and
off to indicate alarms and diagnostics.
link out the Mode of Operation.
Figure 6: PRES 1 & 3 LED Locations
NOTE: The WSHP Module contains no user-serviceable parts.
Contact qualifi ed technical personnel if your Module is
not operating correctly.
18
Technical Guide
Water Source Heat Pump Module
Notes
Technical Guide
19
www.aaon.com
AAON Coil Products
203 Gum Springs Road • Longview, TX 75602-1721
Ph: (903) 236-4403 • Fax: (903) 236-4463
WattMaster Manual Form No: AA-WHP-C-TGD-01J
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