Orion System MHGRV III - Manual (Page 2)

2425 So. Yukon Ave • Tulsa, OK • 74107-2728
Ph: (918) 583-2266 • Fax: (918) 583-6094
AAON ® Part No.: R76540
WM Form: AA-MHGRVIII-TGD-01D
Printed in the USA • Copyright 2010 • All Rights Reserved • March 2011Watt-
Master Controls, Inc. • 8500 NW River Park Drive • Parkville, MO 64152
AAON ® is a registered trademark of AAON, Inc., Tulsa, OK.
WattMaster Controls, Inc. assumes no responsibility for errors or omissions.
This document is subject to change without notice.
Table of Contents
Controller Overview ......................................................................................................................................... 3
General.........................................................................................................................................................................................3
Features .......................................................................................................................................................................................3
Operation......................................................................................................................................................................................3
Inputs and Outputs .......................................................................................................................................... 4
General.........................................................................................................................................................................................4
Analog Inputs ...............................................................................................................................................................................4
24 VAC Contact Closure Inputs ....................................................................................................................................................4
Analog Outputs.............................................................................................................................................................................4
Relay Outputs...............................................................................................................................................................................4
Modulating HGR Valve Outputs ...................................................................................................................................................4
Installation & Wiring ........................................................................................................................................ 5
Controller Mounting ......................................................................................................................................................................5
Important Wiring Considerations ..................................................................................................................................................5
Additional Modulating Hot Gas Valve Control ..............................................................................................................................5
MGHRV III Controller Master To Slave Wiring when Used with VCM Controller .........................................................................6
MGHRV III Controller Master To Slave Wiring when Used with VCM-X Controller ......................................................................8
MGHRV III Controller Master To Slave Stand Alone Wiring .......................................................................................................10
DIP Switch Settings ....................................................................................................................................... 12
Supply Air Temperature ..............................................................................................................................................................12
Supply Air Temperature Reset Limit ..........................................................................................................................................12
Field Testing ...............................................................................................................................................................................13
Start-up & Commissioning............................................................................................................................. 14
General.......................................................................................................................................................................................14
Power Wiring .............................................................................................................................................................................14
Power Up and Operation ............................................................................................................................................................14
Programming the Controller .......................................................................................................................................................14
Sequence of Operation .................................................................................................................................. 15
Initialization.................................................................................................................................................................................15
Modulating Hot Gas Valves ........................................................................................................................................................15
Modes of Operation ....................................................................................................................................................................15
Additional Features ....................................................................................................................................................................15
Troubleshooting ............................................................................................................................................. 16
Using LEDs to Verify Operation..................................................................................................................................................16
Other Checks .............................................................................................................................................................................16