AAON WH Series User Manual

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Table of Contents
AAON WH Series Features and Options Introduction ................................................................... 5
Safety .............................................................................................................................................. 6
WSHP Series Feature String Nomenclature ................................................................................. 10
General Information ...................................................................................................................... 12
Codes and Ordinances .............................................................................................................. 12
Receiving Unit .......................................................................................................................... 13
Storage ...................................................................................................................................... 13
Direct Expansion (DX) Systems ............................................................................................... 13
Wiring Diagrams ....................................................................................................................... 14
Installation..................................................................................................................................... 14
Locating the Unit ...................................................................................................................... 14
Condensate Drain Piping .......................................................................................................... 15
Blower Assembly Removal – Side Access ............................................................................... 18
Discharge Modification ............................................................................................................ 19
Lifting and Handling the Unit ................................................................................................... 20
Horizontal Unit Bottom Access ................................................................................................ 21
Blower Assembly Removal – Bottom Access .......................................................................... 22
Blower Motor and Fan Access .................................................................................................. 23
Refrigerant-to-Water Heat Exchanger Water Piping ................................................................ 23
Electrical ................................................................................................................................... 27
How to Connect to WH Series Disconnect ............................................................................... 29
Duct Connection ....................................................................................................................... 33
Waterside Economizer .............................................................................................................. 33
Startup ........................................................................................................................................... 34
Supply Fans ............................................................................................................................... 34
Fan Air Flow Adjustment ......................................................................................................... 34
Adjusting Refrigerant Charge ................................................................................................... 35
Operation....................................................................................................................................... 38
AAON WSHP Pioneer Silver Controller .................................................................................. 38
AAON WSHP Pioneer Silver Expansion Board ...................................................................... 45
Maintenance .................................................................................................................................. 49
DX Cooling ............................................................................................................................... 49
Condensate Drain Pans ............................................................................................................. 49
Supply Fans ............................................................................................................................... 50
Microchannel Coil Cleaning ..................................................................................................... 50
Filter Replacement .................................................................................................................... 51
Replacement Parts ..................................................................................................................... 52
Warranty, Service, and Parts Department ................................................................................. 52
Filter Information .......................................................................................................................... 52
Appendix A - Heat Exchanger Corrosion Resistance ................................................................... 54
V81280 · Rev. F · 200721

AAON WH Series Specifications

General

Brand	AAON
Model	WH Series
Category	Heat Pump
Language	English