60
VCCX2 Controller Technical Guide
Line
Voltage
GND
18-30 VAC
40 VA
Transformer
Minimum
Supply
Air Temperature
Sensor
Mount In Supply
Air Duct
RED
GRN
WHT
BLK
Condenser Valve #1
HGR Valve #1
RED
GRN
WHT
BLK
Supply Air Temperature
Sensor Connects to AI3 & GND
On VCCX2 Controller
Set Jumper To
NORMAL.
Fan
Compressor
HGR Solenoid Valve
2 Position HGR Valve (Optional)
C1
C2
COMM
EBC E-BUS cable
connects to VCCX2
Expansion port
EBC
E-BUS
cable
connects
to Reheat
Expansion
Module
Alternate Configuration
3 Way Valve
RED
GRN
WHT
BLK
MHGRV-X Controller Wiring
The ASM01670 MHGRV-X Controller is designed to control a
Modulating Hot Gas Reheat Valve to maintain a desired Supply
Air Temperature and Dehumidication setpoint. In addition, up to
seven ASM01687 Reheat Expansion Modules can be connected
to the Controller and to each other for additional Reheat Valve
Control. The MHGRV-X Controller directly connects to the
VCCX2 Controller or indirectly using an E-BUS Expansion
Board via an EBC E-BUS cable. See Figure 41, this page.
NOTE: If using multiple E-BUS Sensors or Modules, the
E-BUS Hub or Adapter Board may be required.
The following information will be passed between the MHGRV-X
controller and the VCCX2 Controller:
• Reheat Enable command
• Supply Air Temperature Setpoint
• The Reset Supply Air Temperature Setpoint
• The Supply Air Temperature Reset Signal
If the communication is interrupted between the MHGRV-X
Controller and the VCCX2 Controller, the MHGRV-X controller
will revert to stand-alone operation.
For more information, refer to the MHGRV-X Controller
Technical Guide.
Figure 41: MHGRV-X Controller to VCCX2 Controller Wiring
WIRING
MHGRV-X Controller
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