AAON MHGRVX-A2 User Manual

3MHGRVX-B2 Module Technical Guide
TABLE OF CONTENTS
OVERVIEW ......................................................................................................................................................... 5
MHGRVX-B2 General Information .......................................................................................................................... 5
WIRING ............................................................................................................................................................... 6
Installation and Wiring ............................................................................................................................................. 6
MHGRVX-B2 to AAON Unit Controller Wiring......................................................................................................... 7
MHGRVX-B2 Stand-Alone Wiring ........................................................................................................................... 8
INPUTS AND OUTPUTS ................................................................................................................................... 9
Inputs ...................................................................................................................................................................... 9
Outputs ................................................................................................................................................................. 10
OPERATION MODES ...................................................................................................................................... 11
Modes of Operation ...............................................................................................................................................11
Additional Features ............................................................................................................................................... 13
LCD SCREENS ................................................................................................................................................ 14
Navigation Keys .................................................................................................................................................... 14
Main Screens Map and Main MHG REHEAT Screens ......................................................................................... 15
Status and Alarm Screens .................................................................................................................................... 16
Setpoint and Force Valves Screens ...................................................................................................................... 17
Protected Screens ................................................................................................................................................ 18
TROUBLESHOOTING ..................................................................................................................................... 21
LED Diagnostics ................................................................................................................................................... 21
Alarms ................................................................................................................................................................... 22
Other Checks ........................................................................................................................................................ 23
APPENDIX A: SAT SENSOR .......................................................................................................................... 25
Supply Air Temperature Sensor Installation .......................................................................................................... 25
SAT Sensor Wiring Guide and Jumper Settings ................................................................................................... 26
APPENDIX B: COMPATIBILITY ..................................................................................................................... 27
MHGRVX Series Drop-In Replacement ................................................................................................................ 27
APPENDIX C: REHEAT EXPANSION MODULE .......................................................................................... 28
Features and Dimensions ..................................................................................................................................... 28
Installation and Wiring ........................................................................................................................................... 29
Wiring .................................................................................................................................................................... 30
Operation Modes .................................................................................................................................................. 31
LED Diagnostics and Troubleshooting .................................................................................................................. 32
APPENDIX D: FREQUENTLY ASKED QUESTIONS ................................................................................... 33
Troubleshooting .................................................................................................................................................... 33

AAON MHGRVX-A2 Specifications

General

Brand	AAON
Model	MHGRVX-A2
Category	Control Unit
Language	English