MHGRV-X ControllerField Technical GuideFactory Packaged Controls

LCD DISPLAY SCREENS MHGRV-X Field Technical Guide 10Main Screens MapRefer to the following map when navigating through the LCD Main Screens. The fi rst

MHGRV-X Field Technical Guide LCD DISPLAY SCREENS11Status & Alarm ScreensStatus ScreensRefer to the following map when navigat

LCD DISPLAY SCREENS MHGRV-X Field Technical Guide 12Setpoint & Force ScreensSetpoint ScreensRefer to the following map when navigating through the

MHGRV-X Field Technical Guide TROUBLESHOOTING13LED DiagnosticsThe MHGRV-X Controller is equipped with LEDs that can be used

TROUBLESHOOTING MHGRV-X Field Technical Guide 14Alarm TroubleshootingSupply Air Temperature Failure:• Verify that the Supply Air Temperature Sensor i

MHGRV-X Field Technical Guide TROUBLESHOOTING15TroubleshootingOther Checks0-3V (SAT OPTIONS Jumper Settings Normal And MODGA

TROUBLESHOOTING MHGRV-X Field Technical Guide 16Table 6, cont.: 0-5V Temperature Sensor - Voltage & Resistance for Type III SensorsThermistor Sen

MHGRV-X Field Technical Guide APPENDIX A17Supply Air Temperature Sensor InstallationMounting the Supply Air

APPENDIX A MHGRV-X Field Technical Guide 18SAT Options Jumper SettingsRefer to Tables 8 & 9 to determine the SAT Option Jumper settings. See Figur

MHGRV-X Field Technical Guide APPENDIX B19Appendix B - MHGRV-X Replacement of MHGRV IIReplacing the MHGRV II

TABLE OF CONTENTS MHGRV-X Field Technical Guide 2WattMaster Controls Inc.8500 NW River Park Drive · Parkville, MO 64152Toll Free Phone: 866-918-1100P

APPENDIX C - REHEAT EXPANSION MODULE MHGRV-X Field Technical Guide 20OverviewThe OE377-01-00059 Reheat Expansion Module (AAON Part No. V42450) is desi

MHGRV-X Field Technical Guide APPENDIX C - REHEAT EXPANSION MODULE21General Wiring InformationFor the wiring diagram to use when the MHGRV-X Controlle

APPENDIX C - REHEAT EXPANSION MODULE MHGRV-X Field Technical Guide 22Figure 9: Reheat Expansion Module(s) Wiring Wiring24VACGNDCOMMGNDENABLEBLACKWHIT

MHGRV-X Field Technical Guide APPENDIX C - REHEAT EXPANSION MODULE23InitializationThe Reheat Expansion Module uses on-board LEDs to indicate vari-ous

APPENDIX C - REHEAT EXPANSION MODULE MHGRV-X Field Technical Guide 24LED DiagnosticsThe Reheat Expansion Module is equipped with 4 LEDs that can be us

MHGRV-X Field Technical Guide APPENDIX C - REHEAT EXPANSION MODULE25TroubleshootingQ & AThe following are common questions and their answers:Q: I

2425 So. Yukon Ave • Tulsa, OK • 74107-2728Ph: (918) 583-2266 • Fax: (918) 583-6094AAON® Part No.: V16950WM Form: AA-MHGRVX-FIELD-TGD-01HPrinted in th

MHGRV-X Field Technical Guide OVERVIEW3OverviewThe OE377-26-00059 MHGRV-X Controller (AAON Part No. V12100

WIRING MHGRV-X Field Technical Guide 4General Wiring InformationDepending on if the MHGRV-X Controller is to be connected to the HVAC controller or is

MHGRV-X Field Technical Guide WIRING5Figure 2: MHGRV-X Controller to AAON Unit Controller Wiring MH

WIRING MHGRV-X Field Technical Guide 6MHGRV-X Stand-Alone WiringFigure 3: MHGRV-X Controller Stand-Alone WiringLineGND24VAC40 VATransformerMinimumSup

MHGRV-X Field Technical Guide INPUTS & OUTPUTS7Inputs and OutputsTable 1: MHGRV-X Controller Inputs & Outputs NOTE:

OPERATION MODES MHGRV-X Field Technical Guide 8InitializationThe MHGRV-X Controller uses on-board LEDs to indicate various diagnostic conditions durin

MHGRV-X Field Technical Guide LCD DISPLAY SCREENS9LCD Display Screen & Navigation KeysThe MHGRV-X Controller allows you to