5
MHGRV-X Field Technical Guide
OVERVIEW
MHGRV-X General Information
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
2
C connection
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.
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
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.
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Figure 1: MHGRV-X Dimensions
Содержание MHGRV-X
Страница 1: ...MHGRV X Controller Field Technical Guide...
