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Table of Contents
Safety .............................................................................................................................................. 5
SB Base Model Description .......................................................................................................... 10
General Information ...................................................................................................................... 15
Codes and Ordinances............................................................................................................... 15
Receiving Unit .......................................................................................................................... 16
Storage ...................................................................................................................................... 16
Direct Expansion (DX) Systems ............................................................................................... 16
Wiring Diagrams ....................................................................................................................... 17
Condensate Drain Pans ............................................................................................................. 17
Installation..................................................................................................................................... 18
Locating the Unit ...................................................................................................................... 18
Floor Mounted Units ............................................................................................................. 18
Lifting and Handling the Unit ................................................................................................... 19
Refrigerant-to-Water Heat Exchanger Water Piping ................................................................ 19
Open Loop Applications ....................................................................................................... 19
Freezing Water in the Heat Exchanger ................................................................................. 20
Water Piping ......................................................................................................................... 21
Electrical ................................................................................................................................... 23
Cutting Electrical Openings .................................................................................................. 23
Thermostat Control Wiring ................................................................................................... 25
Duct Connection ....................................................................................................................... 25
Condensate Drain Piping .......................................................................................................... 26
Waterside Economizer .............................................................................................................. 26
Heating Coils ............................................................................................................................ 27
Startup ........................................................................................................................................... 27
Supply Fans ............................................................................................................................... 28
Supply Fan Airflow Adjustment ........................................................................................... 28
Filters ........................................................................................................................................ 31
Adjusting Refrigerant Charge ................................................................................................... 31
Operation....................................................................................................................................... 34
Packaged DX Cooling Operation and Control .......................................................................... 34
Electric Heating Operation ....................................................................................................... 34
Steam or Hot Water Preheating Operation ............................................................................... 34
Maintenance .................................................................................................................................. 34
DX Cooling ............................................................................................................................... 34
Condensate Drain Pans ............................................................................................................. 34
E-Coated Coil Cleaning ............................................................................................................ 35
Recommended Coil Cleaner ................................................................................................. 35
Recommended Chloride Remover ........................................................................................ 36
Supply Fans ............................................................................................................................... 36
Filter Replacement .................................................................................................................... 37
Replacement Parts ..................................................................................................................... 37
AAON Longview Product Support ........................................................................................... 37
Filter Information .......................................................................................................................... 37
Appendix A - Heat Exchanger Corrosion Resistance ................................................................... 39
