Orion System MHGRV-X - Manual (Page 3)

MHGRV-X Field Technical Guide
OVERVIEW
3
Overview
The OE377-26-00059 MHGRV-X Controller (AAON Part
No. V12100) is designed to control a Modulating Hot Gas Re-
heat Valve to maintain a desired Supply Air Temperature set-
point. 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 (7) Reheat Expansion Modules can be connected to
the Controller and to each other for additional Reheat Valve Control.
The MHGRV-X controller 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 Controller to replace an existing
MHGRV II Controller, see Appendix B, page 19 for details.
See Figure 1 for dimensions (in inches).
MHGRV-X Controller General Information
Figure 1: OE377-26-00059 MHGRV-X Controller 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
2 Hot Gas Reheat Valves
 Control of reheat solenoid valve to provide coil
fl ushing for positive refrigerant oil return
 Can provide further Reheat control using up to (7)
Reheat Expansion Modules
 Contains a 2 x 8 LCD character display and 4 buttons
that allow for status display, setpoint changes, and
confi guration changes
5.73
2.62
2.04
4.09
0.57
0.21
5.04 5.63
5.24
Note: i Depth s 1.49 inches.