Zone
Zone
Two Condenser Head Pressure II Module Technical Guide
7
INSTALLATION & WIRING
E-BUS Controller to Two Condenser Head Pressure II Module Wiring
VCM-X Modular E-BUS, VCM-X WSHP E-BUS
or SA E-BUS Controller to Two Condenser
Head Pressure II Module Wiring
Up to (2) Two Condenser Head Pressure II Modules can be daisy-
chained together and connected to the E-BUS Controller using
a modular HSSC cable. The Two Condenser Head Pressure II
Module requires a 24 VAC power connection with an appropriate
VA rating. See
Figure 4
below for wiring.
Any E-BUS Module can be connected to the E-BUS Controller’s
E-BUS port or can be daisy-chained together using HSSC cables.
NOTE:
Contact Factory for the correct HSSC cable
length for your application. Cables are available
in ¼, ½, 1, 2, 3, 4, and 5 Meter lengths and 100
and 150 Foot lengths.
Figure 4: VCM-X E-BUS Controller to Two Condenser Head Pressure II Module Wiring Diagram
SIG
GND
+V
BK
RD
WH
SIG
GND
+V
BK
RD
WH
SIG
GND
+V
BK
RD
WH
SIG
GND
+V
BK
RD
WH
Head Pressure Transducers
0 - 667 PSI
(One Per Refrigerant Circuit)
OPTIONS Dip Switch Setting Not Required
When Connected To
VCM-X E-BUS Controller
or SA E-BUS Controller
Connect To Other
WattMaster-Approved
E-BUS Expansion Module(s)
HSSC Cable
24 VAC Transformer
3 VA Minimum
Line Voltage
24
VA
C
GND
WARNING!!
Observe Polarity! All boards
must be wired with GND-to-GND and 24
VAC-to-24 VAC.
Failure to observe polarity could result in
damage to the boards.
NOTE:
NORMALLY OPEN AND
RATED FOR 24 VAC POWER
ONLY - 1 AMP MAXIMUM LOAD
ALL RELAY OUTPUTS
ARE
HSSC Cable
Connect To VCM-X E-BUS
Controller or SA E-BUS Controller
Set ADDRESS Dip Switch 1 to ON for
Water Cooled or to OFF for Air Cooled.
Currently showing OFF for Air Cooled.
Set ADDRESS Dip Switch 2 to OFF
on all communicating applications
unless it is intended to be the Second
Head Pressure Module on a system. If
set to ON, it will not communicate.
Set ADDRESS Dip Switch 3 to ON to
disable Circuit B alarms when only one
Condenser is Used. Currently showing
OFF.
Set ADDRESS Dip Switch 4 to OFF to
make reversing valve "ON to Heat /
OFF to Cool.” Set to ON to make
reversing valve “ON to Cool / OFF to
Heat.” Currently showing OFF.
.
Currently showing OFF.
+24 Volts
Condenser Fan A
ECM Motor
Duty Cycle
Condenser Fan B
ECM Motor
COM
+
Condenser
Signal B
COM
+
Condenser
Signal A
CONDENSER A ENABLE
R1
HVAC UNIT CONNECTION
R3
CONDENSER B ENABLE
COMM
REVERSING VALVE B ENABLE
REVERSING VALVE A ENABLE
R4
R2
YELLOW
BLUE +24 OUT
+24 Volts
Duty Cycle
YELLOW
BLUE +24 OUT
ALARM
ANALOG
STAT
COMM
R1
R2
GND
RELAYS
R3
R4
Rc
AO1
AO2
PWM1-
PWM1+
PWM2-
PWM2+
ADDRESS
OPTIONS
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
+5V
SIG 1
GND
BIN 1
BIN 2
BIN 3
COM
LABEL P/N:
G040380
E-BUS
SIG 1
GND
+5V
SIG 2
+5V
GND
+5V
SIG 3
GND
SIG 4
GND
+5V
+24
VAC
GND
BIN 1
BIN 2
BIN 3
COM
HEAD
PRESSURE
TRANSDUCER #1
HEAD
PRESSURE
TRANSDUCER #2
HEAD
PRESSURE
TRANSDUCER #3
HEAD
PRESSURE
TRANSDUCER #4
REV. VLV. ENABLE INPUT
PWM2+
ASM01891
AAON P/N:
AO2
GND
AO1
COND. A ENABLE INPUT
COND. B ENABLE INPUT
COND. A SIGNAL
COND. B SIGNAL
PWM1-
PWM1+
PWM2-
COND. FAN A
COND. FAN B
COND. FAN A
COND. FAN B
GND
HEAD PRESSURE II MODULE
HP2C2 TWO CONDENSER
www.aaon.com
RELA
Y CONT
ACT
RA
TING IS 1
AMP
MAX @ 24 V
AC
COND. A ENABLE
COND. B ENABLE
REV. VLV. A ENABLE
REV. VLV. B ENABLE
R1
R2
R3
R4
RC
RELAY COMMON
A1
A2
B1
B2
E-BUS
LED BLINK CODES
LED NAME
BLINKS QTY. OF SENSORS INSTALLED
LED NAME
STAT
ALARM
NO PROBLEMS
NO SENSORS DETECTED
HIGH HEAD PRESSURE
DETECTED
LOW HEAD PRESSURE
DETECTED
0
1
2
3
COMMON
NOTE:
The HSSC cable is no longer shipped with this module.
If it is to be used with a VCM-X Modular E-BUS,
VCM-X WSHP E-BUS, or SA E-BUS Controller,
use the existing cable if possible.
