AAON Orion VCCX2 User Manual

53
VCCX2 Controller Technical Guide
Refrigerant System Module for VFD
Compressors - Heat Pump Wiring
The ASM01693 Refrigerant System Module for VFD
Compressors - Heat Pump (RSMV-HP) monitors and controls one
refrigeration circuit of the HVAC unit. The module is designed
for R410-A refrigerant.
The RSMV-HP is connected to the VCCX2 Controller. Up to
4 RSMV-HP’s can be connected, depending on the size of the
system. There are two E-BUS Expansion Ports which allow the
use of communicating sensors and the E-BUS Modules.
The RSMV-HP provides six analog inputs, four binary inputs,
four relays, and two analog outputs. See Figure 34, this page
for inputs wiring and Figure 35, page 54 for outputs wiring.
Suction Pressure Sensor Wiring
The ASM02222 Suction Pressure Transducer must be wired
as shown in Figure 34, this page. It is required for all comp-
ressorized VCCX2 applications.
The Suction Pressure Sensors are used to measure suction
pressure at the HVAC unit’s DX evaporator coil suction line.
This suction line pressure is converted to saturated refrigerant
temperature. The saturated refrigerant temperature is used to
properly control the compressors to maintain a given Suction
Coil (Saturated) Temperature Setpoint. In Cooling and Heat
Pump mode, the VCCX2 resets the Suction Coil (Saturated)
Temperature Setpoint to maintain a given supply air temperature
setpoint. In Dehumidication mode, the Suction Coil (Saturated)
Temperature Setpoint is a user congurable setpoint that does
not reset.
WARNING: Observe Polarity! All boards must be
wired with GND-to-GND and 24 VAC-
to-24 VAC. Failure to observe polarity
will result in damage to one or more of the
boards. Expansion modules must be wired
in such a way that the expansion modules
and the controller are always powered
together. Loss of power to the expansion
module will cause the controller to become
inoperative until power is restored to the
expansion module.
18-30 VAC
GND
Line
Voltage
Size transformer for
correct total load.
RSMV = 18 VA
RSMV-HP
SP
GND
+V
BK
RD
WH
HP
GND
+V
BK
RD
WH
TEMP1
TEMP2
COMP STAT 1
COMP STAT 2
BIN1
BIN2
TEMP3
TEMP4
TEMP5
GND
GND
GND
Coil Temp. 2
Sensor
Coil Temp. 3
Sensor
Coil Temp. 4
Sensor
BIN3
COM
+
AOUT1
AOUT2
COM
+
COIL TEMP SWITCH / POF
GND
Suction Pressure
Sensor
Head Pressure
Sensor
Coil Temp. 1
Sensor
Leaving Water
Temp Sensor
Modulating
Compressor
Condenser
Signal
Figure 34: RSMV-HP Inputs Wiring
WIRING
RSMV-HP Controller Inputs

AAON Orion VCCX2 Specifications

General

Brand	AAON
Model	Orion VCCX2
Category	Controller
Language	English