7MHGRVX-B2 Module Technical Guide
WIRING
MHGRVX-B2 to AAON Unit Controller Wiring
Communications Wiring
For connection to a VCCX2 or VCB-X Controller, VCCX2 or
VCB-X Expansion Module, and Reheat Expansion Module, use
an E-BUS cable to connect to the appropriate E-BUS port on those
modules and/or controller.
When connected to an AAON unit controller, the Supply Air
Temperature Sensor is attached to the AAON unit controller.
See Figure 2, this page.
See the SAT Wiring Conditions and SAT OPTIONS jumper settings
in Tables 8 and 10, page 26.
Figure 2: MHGRVX-B2 to AAON Unit Controller Wiring
GND
RED
GRN
WHT
BLK
Condenser Valve #1
HGR Valve #1
RED
GRN
WHT
BLK
Compressor
Flush Active Signal
Two Position HGR Valve
(Optional)
C1
C2
COMM
RED
GRN
WHT
BLK
Mount in Supply
Air Duct
Supply Air
Temperature
Sensor
Supply Air Temperature Sensor
connects to AI3 and GND on the
VCCX2 Controller
Set jumper to
NORMAL
E-BUS cable connects to
the VCCX2 expansion port
E-BUS cable connects to the
Reheat Expansion Module
Line
Voltage
40 VA transformer
minimum
18-30 VAC
Fan
Alternate configuration for
three-way valve
R2
D15
J3
MODGASx
MODGAS
NORMAL
R1
SAT OPTIONS
AOUT
GND
0-10 VDC Signal
(optional)
R59
R60
R60
U9
C46
R61
R75
SAT
GND
290
COOL OVRD
HEAT OVRD
REHEAT EN
RESET IN
AUX IN
GND
TB3
C18
R18
F1
V2
V3
V1
LC
FAN
COMP
VALVE
AUX
COMMON
TB2
STATUS
ALARM
COMM
POWER
CONDENSOR DRIVE
BLACK
WHITE
RED
GREEN
OPENING
TB4
REHEAT DRIVE
BLACK
WHITE
GREEN
RED
OPENING
TB5
C23
.01uF
SERIAL #
DISPLAY
R49
R48
R44
R42
R9
R4
U8
C38
R7
R8
C43
R6
10
ALARM
UP
ENTER
MENU
DOWN
www.aaon.com
AAON P/N: ASM06927
MHGRVX-B2
FAN
COMPRESSOR
CONDENSER
DRIVE TERMINALS
REHEAT VALVE
DRIVE TERMINALS
REHEAT VALVE
AUX
BLACK
GND
AUX INPUT (AI)
RESET SIG (AI)
RHT EN (BI)
SAT (AI)
0-10V VLV (AO)
HEAT OVR (BI)
COOL OVR (BI)
GND
GND
BLACK
WHITE
WHITE
RED
RED
GREEN
GREEN
COMMON
RELAY
OUTPUTS
INPUT/OUTPUT TERMINALS (TYPE)
CONTACT
RATING IS
1 AMP MAX
@ 24 VAC
GND
+24 VAC
LABEL P/N:
G112610
E-BUS
CONNECT
E-BUS
CONNECT
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