AAON RSMD2R, Technical Manual

Page: 9 / 42

9
RSMD2R Technical Guide
WIRING
RSMD2R Outputs Wiring
Head Pressure Control
The Head Pressure Transducers are used to measure Head
Pressure at the discharge line. This Head Pressure is used to
drive the Condenser Fans with a 0-10 VDC output signal or
valve with a 2-10 VDC output signal to maintain a given Head
Pressure Setpoint.
Compressor Discharge Sensors
The Digital Compressor Discharge Temperature Sensor monitors
the discharge temperature from the Digital Compressor to protect
against overheating.
Leaving Water Temperature Sensor
The Leaving Water Temperature Sensor is used to measure the
Leaving Water Temperature when used on a WSHP unit.
CAUTION: The Shraeder port used for installation of the
suction pressure transducer should be located in
a vertical position of the suction line to prevent
refrigerant oil from accumulating in the sensor.
NOTE:
If there are two Compressors on a single circuit (a
tandem circuit), Suction Pressure 2, Head Pressure
2, and Condenser Signal 2 would not be used.
Figure 3: RSMD2R Outputs Wiring
GND
18-30
VAC
Line Voltage
Size transformer for
correct total load.
RSMD2R = 18 VA
10A250VAC
~
5
A
3
0
V
D
C
SA
VDE
G
5
Q
-1
A
4
O
M
R
O
N
DC12
V
C
H
IN
A
ALARM
UP
DOWN
ENTER MENU
AAON P/N: ASM02869
+24
V
A
C
GND
RELAY CONTACT
RATING IS 1 AMP
MAX @ 24 VAC
CONDENSER 1
COMP 1
COMP 2
ANALOG OUT
REVERSING VALVE
COMMON
RELAY OUTPUT
TERMINALS
LABEL P/N:
G088060
COND 1
COND 2
GND
24 VAC
POWER ONLY
WARNING!
POLARITY
MUST BE
OBSERVED
OR THE
CONTROLLER
WILL BE
DAMAGED
CONDENSER 2
HEAD PRES 1
+5 V
+5 V
COMP DIS 1
COMP 1
SP-1
HP-1
COMP DIS 2
COMP 2
GND
GND
OA COIL / POWF
EMER SHDN
GND
LEAVING H20
GND
SUCTION PRES 2
HEAD PRES 2
+5 V
+5 V
SP-2
HP-2
GND
GND
R+
SHD
T-
E-BUS
R+ SHD T-
DUAL E-BUS
EXPANSION
RSMD2R www.aaon.com
SUCTION PRES 1
Belimo actuator wiring
shown. Consult factory for
other manufacturer wiring
instructions.
Note:
All relay outputs are normally open
and rated for 24 VAC power only.
1 Amp maximum load.
24 VAC ONLY
COMPRESSOR 1 ENABLE
COMPRESSOR 2 ENABLE
CONDENSER 1 ENABLE
CONDENSER 2 ENABLE
REVERSING VALVE
Digital Compressor 1
Digital Compressor 2
Condenser
Signal 1
Condenser
Signal 2
WSE Bypass
Valve Actuator
RLY2
RLY1
RLY4
RLY3
RLY5
COMM
UNLOAD
24 VAC
UNLOAD
AOUT1
GND
AOUT2
Connects to VCCX2
Loop Communications
connector when used on
a split system.
GND
+
GND
+
COM
+
COM
+
1 COM
2 +
3 Y1