Orion System VCC-X Controller - Manual (Page 46)

MHGRV-X CONTROLLER WIRING
VCC-X Controller Technical Guide 46

The Supply Air Temperature Reset Signal

If the communication is interrupted between the
MHGRV-X Controller and the VCC-X Controller,
the MHGRV-X controller will revert to stand-alone
operation.
For more information, refer to the MHGRV-X Controller Technical
Guide.
NOTE: If using multiple E-BUS Sensors or Modules, the
E-BUS Hub or Adapter Board may be required.
MHGRV-X Controller Wiring
MHGRV-X Controller Wiring
The OE377-26-00059 MHGRV-X Controller (AAON part number
V12100) is designed to control a Modulating Hot Gas Reheat Valve
to maintain a desired Supply Air Temperature and Dehumidifi cation
setpoint. The MHGRV-X Controller directly connects to the VCC-
X Controller or indirectly using an E-BUS Expansion Board via an
EBC E-BUS cable. See Figure 31.
The following information will be passed between the MHGRV-X
controller and the VCC-X Controller:

Reheat Enable command

Supply Air Temperature Setpoint

The Reset Supply Air Temperature Setpoint
Figure 31: MHGRV-X Controller to VCC-X Controller Wiring
Line
GND
24V
AC
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
EBC E-BUS Cable
Connects To The
VCC-X Controller’s
Expansion Port Directly
or Indirectly Using an
E-BUS Expansion Board
Supply Air Temperature
Sensor Connects to AI3 & GND
On VCC-X Controller
MHGRV-X CONTROLLER
(OE377-26-00059)
Set Jumper To
NORMAL.
Fan
Compressor
HGR Solenoid Valve
2 Position HGR Valve (Optional)
C1
C2
COMM