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VCCX2 Controller Technical Guide
RSMZ Controller Output Wiring
The RSMZ Controller provides the following features:
• Modulates the Compressors to satisfy the Suction Coil
(Saturated) Temperature. The Suction Coil (Saturated)
Temperature Setpoint is reset by the VCCX2 Controller
to maintain the Supply Air Temperature during Cooling
mode. During Dehumidication mode, it controls the
Compressors to the Suction (Saturation) Temperature
Setpoint.
• Modulates the Condenser Fan or Valve to maintain the
Head Pressure Setpoint.
• Monitors the performance of the DMQ Universal
Superheat Controller/Sensor (USHX) to maintain the
Superheat Setpoint of each evaporator coil.
• Provides alarms and safeties for the Compressor and
Condenser operation.
• Provides a 2 x 8 LCD character display and four
buttons that allow for status of system operation, system
setpoints, system congurations, sensors, and alarms,
and to change the module’s address, if necessary.
See Figure 39, this page for output wiring.
ALARM
UP
DOWN
ENTERMENU
18-30 VAC
GND
Line Voltage
RSMZ Controller = 18 VA
Size transformer for correct
total load.
R+
SHD
T-
R+
SHD
T-
COM
CONDENSER FAN ENABLE
COMPRESSOR 1 ENABLE
RLY1
RLY3
COMPRESSOR 2 ENABLE
RLY2
REHEAT ENABLE
RLY4
24 VAC
R
RSMZ
RED
GRN
BLK
RED
GRN
BLK
DMQ USHX #1
Superheat
Controller
Terminals
DMQ USHX #2
Superheat
Controller
Terminals
Figure 39: RSMZ Outputs Wiring
WIRING
RSMZ Controller Outputs
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