Overview; Mhgrv-X General Information; Figure 1: Mhgrv-X Dimensions - AAON MHGRV-X Field Technical Manual

Overview

The MHGRV-X is designed to control a Modulating Hot Gas
Reheat Valve to maintain a desired Supply Air Temperature
setpoint. The controller can be used as a stand-alone controller
or can be used in conjunction with any AAON unit controller.
In addition, up to seven Reheat Expansion Modules can be
connected to the Controller and to each other for additional
Reheat Valve Control.
The MHGRV-X connects to an AAON unit controller or
expansion module via a modular cable. Depending on the type
of unit controller, this connection will utilize an I
or an E-BUS connection.
When using the MHGRV-X to replace an existing MHGRV II
Controller, see Appendix B, page 22 for details. See Figure 1,
this page for dimensions.
5.04

Figure 1: MHGRV-X Dimensions

MHGRV-X Field Technical Guide
C connection
2
2.62
ALARM
0.21
2.04
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MHGRV-X General Information

Features
The MHGRV-X provides the following:
• Can be operated as a stand-alone controller 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
flushing 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
configuration changes
5.73
5.24
UP
MENU ENTER
DOWN
NOTE: Depth is 1.50
inches.
4.09
NOTE: All dimensions
are in inches.
OVERVIEW
5.63
5