AAON MHGRVX-A2 User Manual

5MHGRVX-B2 Module Technical Guide
OVERVIEW
MHGRVX-B2 General Information
Overview
The MHGRVX-B2 is designed to control a Modulating Hot Gas
Reheat Valve to maintain a desired Supply Air Temperature Setpoint.
The MHGRVX-B2 can be used as a stand-alone module or can be
used in conjunction with an AAON unit controller with E-BUS
capability.
In addition, up to seven Reheat Expansion Modules can be connected
to the MHGRVX-B2 and to each other for additional reheat valve
control.
The MHGRVX-B2 connects to an AAON unit controller or
expansion module via an E-BUS cable.
CAUTION: This module only works as intended with the
Sanhua EBV05H reheat valve. See Appendix
B, page 27, for MHGRVX series compatibility.
NOTE: This module does not support I
2
C connections.
Features
The MHGRVX-B2 provides the following:
• Can be operated as a stand-alone module or communicating
with AAON unit controllers.
• Provides for Supply Air Temperature Setpoint reset when
required.
• Second stage reheat capability when using two hot gas
reheat valves.
• Control of the reheat solenoid valve to provide coil ushing
for positive refrigerant oil return.
• Can provide further reheat control using up to seven Reheat
Expansion Modules.
• Contains a 2 x 8 LCD character display and four buttons
that allow for status display, setpoint changes, and
conguration changes
Figure 1: MHGRVX-B2 Dimensions
5.73
2.62
2.04
4.09
0.57
0.21
5.04
5.63
5.24
NOTE: Depth is 1.50 inches.
NOTE: All dimensions are in inches.
D15
J3
MODGASx
MODGAS
NORMAL
R59
R60
R60
U9
C46
R61
R75
SAT OPTIONS
SAT
GND
290
AOUT
GND
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

AAON MHGRVX-A2 Specifications

General

Brand	AAON
Model	MHGRVX-A2
Category	Control Unit
Language	English