Water Source Heat Pump Module
Technical Guide
4
Overview
The Water Source Heat Pump Module monitors the compressors on an
AAON
®
Water Source Heat Pump unit and can disable the compres-
sors based on low Suction Pressure, Leaving Water Temperature, and
Water Proof of Flow inputs. It also utilizes a Delay Timer to prevent the
compressors from turning on at the same time.
There is one water-only version of the Water Source Heat Pump Mod-
ule—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-VCMX-
WSHP-C) using the E-BUS Distribution Module (OE365-23-EBD-C).
This allows the Water 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 con-
nection with an appropriate VA rating.
Module Overview
Figure 1: Water Source Heat Pump Module
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.
WATTMASTER CONTROLS
Y 102374 REV 0S
MADE IN USA
WattMaster Label
#LB102069-B
Rev.: 1E
E-BUS
Connector
E-BUS
Connector
+24 VAC
GND
WSHP Module
Orion No.: OE334-23-WPM-C
AAON Coil No.: 30318
www.aaon.com
www.orioncontrols.com
RELAY CONTACT RATING
IS 1 AMP MAX @ 24 VAC
COMP. A2 ENABLE
COMP. A1 ENABLE
R1
R2
R3
R4
R5
RC
RELAY COMMON
COMP. B1 ENABLE
COMP. B2 ENABLE
ALARM OUTPUT
+5V
PRES
GND
+5V
PRES
GND
BIN 1
BIN 2
BIN 3
BIN 4
BIN 5
BIN 6
BIN 7
COM
SUCT. PR. SENSOR
PRES 1=A1, PRES 2=N/A
PRES 3=B1, PRES 4=N/A
NOT USED
PRES 1=A1, PRES 2=N/A
PRES 3=B1, PRES 4=N/A
COMP. A1 ENABLE
COMP. A2 ENABLE
COMP. B1 ENABLE
COMP. B2 ENABLE
COOL ENABLE
WATER POF
NOT USED
COMMON
T1
T2
GND
LEAVING WATER TEMP
GROUND
NOT USED
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
AO1
A2O
CIRCUIT A -COMP. A1
+5 NOT USED, PRES TO P6 & GND TO P5
+5 TO RED, PRES TO WHT & GND TO BLK
CONNECT TO CNTLR C2 TERM.
CIRCUIT B - COMP. B1
DIGITAL COMRESSORS
DIGITAL COMP. A1 & B1
NON-DIGITAL COMPRESSORS
(12 paginas)
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