Orion System VCM-X Modular E-BUS - Manual (Page 39)

VCM-X Modular E-BUS Controller Technical Guide
ADDITIONAL APPLICATIONS
39
Two Condenser Head Pressure II Module Overview and Wiring
Two Condenser Head Pressure II
Module
The Two Condenser Head Pressure II Module (OE370-23-HP2C2)
monitors four individual head pressure transducers and controls two
Condenser Fans or Water Valves on units with two physically separate
condenser sections. The highest reading of head pressure transducers 1
& 2 controls Condenser Signal A. The highest reading of head pressure
transducers 3 & 4 controls Condenser Signal B. If this is a heat pump
unit, the module is able to detect when the unit is in Heat Pump Heat-
ing mode and will force the condenser signal to 100% until it leaves
this mode.
A pulse width modulation (PWM) signal or 0-10 volt output
signal is used to control the condenser fans.
The Two Condenser Head Pressure II Module connects to the VCM-X
Modular E-BUS Controller ( OE332-23E-VCMX-MOD-A or -C) or the
VCM-X WSHP E-BUS Controller ( OE332-23E-VCMX-WSHP-A or
-C). This allows the Two Condenser Head Pressure II Module to receive
setpoints from the VCM-X Modular E-BUS Controller or VCM-X
WSHP E-BUS Controller. See Figure 35 below for wiring diagram.
The Two Condenser Head Pressure II Module requires a 24 VAC power
connection with an appropriate VA rating.
NOTE: For complete information, including the sequence of
operation, refer to the Two Condenser Head Pressure II Module
Technical Guide.
Figure 35: 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)
OE370-23-HP2C2
Two Condenser Head Pressure II Module
OPTIONS Dip Switch Setting Not Required
When Connected To
VCM-X E-BUS Controller
+5V
SIG 2
GND
OP
T IO
N
S
ALARM
ANALOG
STAT
+5V
COMM
GND
SIG 4
GND
R1
R2
GND
RELAYS
SIG 3
+5V
GND
+5V
SIG 1
R3
R4
Rc
AO1
AO2
PWM1-
PWM1+
PWM2-
PWM2+
PWR
HSSC Cable
24 VAC Transformer
3 VA Minimum
Line Voltage
24 V
A
C
GND
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
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.
Currently showing OFF.
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.
.
ADDRESS
BIN 1
BIN 2
BIN 3
COM
+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
LED BLINK CODES
LED NAME STAT
BLINKS QTY. OF SENSORS INSTALLED
LED NAME ALARM
NO PROBLEMS 0
NO SENSORS DETECTED 1
HIGH HEAD PRESSURE DETECTED 2
LOW HEAD PRESSURE DETECTED 3
WattMaster Label
#LB102110-A
Rev.: 1A
E-BUS
Connector
E-BUS
Connector
+5V
SIG 1
GND
+5V
SIG 2
GND
+5V
SIG 3
GND
+5V
SIG 4
GND
+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
COMMON
PWM2+
AAON No.:
V20660
AO1
AO2
GND
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
Two Condenser Head Pressure II Module
2C2 Orion No.:OE370-23-HP
www.aaon.com
RELA
Y
C
ONT
A
CT
RA
TING
IS
1
A
MP
MAX
@
24
V A
C
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
Connect To VCM-X
Modular E-BUS Controller or
VCM-X WSHP E-BUS Controller
(See for details.) Figure 33