57
VCCX2 Controller Technical Guide
RSMZ Controller Input Wiring
The ASM02351 Refrigerant System Module for VFD Comp-
ressors (RSMZ) monitors and controls one refrigeration circuit
of the HVAC unit. The RSMZ is used on RZ units and on RN-E
units with Danfoss compressors. The module is designed for
R410-A refrigerant.
The RSMZ Controller is connected to the VCCX2 Controller.
Three or six RSMZ Modules 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. There is a MODBUS terminal block which allows
wiring to the Reheat Expansion Module or VFD Compressor.
The RSMZ Controller must be connected to an 18-30 VAC power
source. When wiring the RSMZ Controller, its relay outputs must
be wired as wet contacts (connected to 24 VAC). See Figure 38,
this page for input wiring.
WARNING: Observe Polarity! All boards must be
wired with GND-to-GND and 24VAC-to-
24VAC. Failure to observe polarity will
result in damage to one or more of the
boards.
ALARM
UP
DOWN
ENTERMENU
18-30 VAC
GND
Line Voltage
Size transformer for correct total
load. RSMZ Controller = 18 VA
COM
+
HP
GND
+V
BK
RD
WH
BIN1
BIN2
AOUT2
GND
BIN3
TEMP1
GND
RSMZ
Head Pressure
Transducer
Discharge
Temperature
Sensor
Compressor 1 Status
Compressor 1 Status
Oil Level Switch
Condenser Fan
Figure 38: RSMZ Inputs Wiring
WIRING
RSMZ Controller Inputs
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