Zone
Zone
INSTALLATION & WIRING
VCB-X Controller Field Technical Guide
52
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 Dehumidi
fi
cation
setpoint. The MHGRV-X Controller directly connects to the VCB-
X Controller or indirectly using an E-BUS Expansion Board via an
EBC E-BUS cable. See
Figure 38
.
The following information will be passed between the MHGRV-X
controller and the VCB-X 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 VCB-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.
Figure 38: MHGRV-X Controller to VCB-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
VCB-X Controller’s
Expansion Port Directly
or Indirectly Using an
E-BUS Expansion Board
Supply Air Temperature
Sensor Connects to AI2 & GND
On VCB-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
Revised 8/29/13
