Zone
Zone
Two Condenser Head Pressure II Module Technical Guide
6
INSTALLATION & WIRING
Figure 3: Two Condenser Head Pressure II Module Wiring Diagram (Stand-Alone)
Stand-Alone Wiring
5. Check all wiring leads at the terminal block for tightness.
Be sure that wire strands do not stick out and touch adjacent
terminals. Confirm that all transducers required for your
system are mounted in the appropriate location and wired into
the correct terminals.
WARNING:
Be sure all controllers and modules are
powered down before connecting or
disconnecting HSSC cables.
Stand-Alone Wiring
To operate the Two Condenser Head Pressure II Module as Stand
Alone, connect the Module to a 24 VAC connection with an
appropriate VA rating. See
Figure 3
for wiring.
Check all wiring leads at the terminal block for tightness. Be sure
that wire strands do not stick out and touch adjacent terminals.
Confirm that all transducers required for your system are mounted
in the appropriate location and wired into the correct terminals.
Condenser Type Selection
As shown in
Figure 3
, set ADDRESS Dip Switch 1 to ON for
water cooled or to OFF for air cooled. Refer to
page 9
for further
instructions.
SIG
GND
+V
BK
RD
WH
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.
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 is
Used for Setting the Head
Pressure Setpoint if Not
Using Default Setpoint.
COM
+
Condenser
Signal B
COM
+
Condenser
Signal A
CONDENSER A ENABLE
R1
HVAC UNIT CONNECTION
R3
CONDENSER B ENABLE
NOTE:
NORMALLY OPEN AND
RATED FOR 24 VAC POWER
ONLY
ALL RELAY OUTPUTS
ARE
- 1 AMP MAXIMUM LOAD
COMM
Set ADDRESS Dip Switch 1 to ON
for Water Cooled or to OFF for Air
Cooled. Currently showing OFF for
Air Cooled.
ADDRESS Dip Switch 2 is not used
in this application..
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.
CONDENSER A ON/OFF
CONDENSER B ON/OFF
COM
REVERSING VALVE A/B ON/OFF
REVERSING VALVE B ENABLE
REVERSING VALVE A ENABLE
R4
R2
+24 Volts
Condenser Fan A
ECM Motor
Duty Cycle
Condenser Fan B
ECM Motor
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
