4
Discharge and Suction Line Piping ........................................................................................... 49
Heating Coils ............................................................................................................................ 52
Chilled Water Coil .................................................................................................................... 52
Startup ........................................................................................................................................... 53
Filters ........................................................................................................................................ 53
Adjusting Refrigerant Charge ................................................................................................... 53
Checking Liquid Sub-Cooling .............................................................................................. 54
Checking Evaporator Superheat ........................................................................................... 54
Adjusting Sub-Cooling and Superheat Temperatures ........................................................... 54
Gas Heater Instructions ............................................................................................................. 57
Supply Fan EC Motor Startup................................................................................................... 58
Condenser Fan EC Motor Startup ............................................................................................. 59
Operation....................................................................................................................................... 60
Thermostat Operation ............................................................................................................... 60
Packaged DX Cooling Operation and Control .......................................................................... 60
Gas Heater Operation ................................................................................................................ 60
Electric Heating Operation ....................................................................................................... 61
Steam or Hot Water Preheating and Heating Operation ........................................................... 61
Chilled Water or Non-Compressorized DX Cooling Operation ............................................... 61
Maintenance .................................................................................................................................. 62
Gas Heating ............................................................................................................................... 62
Gas Heat Exchanger Removal .................................................................................................. 63
DX Cooling ............................................................................................................................... 63
Condenser Fan .......................................................................................................................... 64
Condensate Drain Pans ............................................................................................................. 64
Evaporator Coil ......................................................................................................................... 64
E-Coated Coil Cleaning ............................................................................................................ 65
Microchannel Coil Cleaning ..................................................................................................... 67
Supply Fan ................................................................................................................................ 67
Phase and Brownout Protection ................................................................................................ 68
Variable Capacity Compressor Controller ................................................................................ 70
Filter Replacement .................................................................................................................... 71
Replacement Parts ..................................................................................................................... 72
Appendix A - Heat Exchanger Corrosion Resistance ................................................................... 73
