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Table of Contents
Safety .............................................................................................................................................. 6
General Information ...................................................................................................................... 16
Codes and Ordinances ............................................................................................................... 16
Receiving Unit ........................................................................................................................... 16
Storage ....................................................................................................................................... 17
Direct Expansion (DX) Systems ............................................................................................... 17
Wiring Diagrams ....................................................................................................................... 18
Condensate Drain Pans .............................................................................................................. 18
Unit Size .................................................................................................................................... 18
Installation..................................................................................................................................... 18
Locating the Unit ....................................................................................................................... 18
Lifting and Handling the Unit ................................................................................................... 19
Split Unit Assembly .................................................................................................................. 26
Refrigerant-to-Water Heat Exchanger ...................................................................................... 29
Open Loop Applications ........................................................................................................ 29
Freezing Water in the Heat Exchanger .................................................................................. 29
Water Piping .......................................................................................................................... 30
Brazed Plate Heat Exchanger Cleaning ................................................................................. 33
Electrical .................................................................................................................................... 33
Cutting Electrical Openings ................................................................................................... 34
Thermostat Control Wiring .................................................................................................... 35
Duct Connection ........................................................................................................................ 36
Condensate Drain Piping ........................................................................................................... 36
Waterside Economizer .............................................................................................................. 37
Hot Water Coil .......................................................................................................................... 41
Chilled Water Coil .................................................................................................................... 41
Startup ........................................................................................................................................... 41
Supply Fans ............................................................................................................................... 41
Supply Fan Spring Isolator Adjustment ................................................................................ 41
Supply Fan Removal .............................................................................................................. 43
Fan Airflow Adjustment ........................................................................................................ 43
Filters ......................................................................................................................................... 45
Adjusting Refrigerant Charge ................................................................................................... 45
Operation....................................................................................................................................... 47
Steam or Hot Water Preheating Operation ................................................................................ 47
Chilled Water or Non-Compressorized DX Cooling Operation ............................................... 47
Packaged DX Cooling Operation and Control .......................................................................... 48
Maintenance .................................................................................................................................. 48
DX Cooling ............................................................................................................................... 48
Condensate Drain Pans .............................................................................................................. 48
E-Coated Coil Cleaning ............................................................................................................ 48
Recommended Coil Cleaner .................................................................................................. 49
Recommended Chloride Remover ......................................................................................... 49
Supply Fans ............................................................................................................................... 50
