AAON RN SERIES Installation Operation & Maintenance page 4

Adjusting Refrigerant Charge ................................................................................................... 68
Checking Liquid Sub-Cooling .............................................................................................. 68
Checking Evaporator Superheat............................................................................................ 68
Adjusting Sub-cooling and Superheat Temperatures............................................................ 69
Gas Heater Instructions ............................................................................................................. 71
Condenser Fan Electronically Commutated Motor (ECM) Startup ......................................... 72
VFD Controlled Condenser Fan Startup ................................................................................... 73
Adjustable Fan Cycling Switch Procedure ............................................................................... 74
Operation....................................................................................................................................... 76
Thermostat Operation ............................................................................................................... 76
Packaged DX Cooling Operation and Control ......................................................................... 77
Gas Heater Operation ................................................................................................................ 77
Electric Heating Operation ....................................................................................................... 77
Steam or Hot Water Preheating and Heating Operation ........................................................... 77
Modulating Electric Preheat ..................................................................................................... 77
Chilled Water or Non-Compressorized DX Cooling Operation ............................................... 77
Maintenance .................................................................................................................................. 78
Gas Heating ............................................................................................................................... 78
Gas Heat Exchanger Removal .................................................................................................. 79
DX Cooling ............................................................................................................................... 79
Condenser Fans (6-25 and 30 ton) ............................................................................................ 79
Condensate Drain Pans ............................................................................................................. 80
Evaporator Coil (6-25 and 30 ton) ............................................................................................ 81
Brazed Plate Heat Exchanger Cleaning .................................................................................... 82
E-Coated Coil Cleaning ............................................................................................................ 82
Microchannel Coil Cleaning ..................................................................................................... 83
Supply Fans ............................................................................................................................... 85
Phase and Brownout Protection Module .................................................................................. 86
Variable Capacity Compressor Controller ................................................................................ 89
Filter Replacement .................................................................................................................... 90
Filter Information .......................................................................................................................... 91
Replacement Parts ..................................................................................................................... 92
Appendix A - Heat Exchanger Corrosion Resistance ................................................................... 93
Appendix B - Thermistor Temperature vs. Resistance Values ..................................................... 95
RN Series Startup Form ................................................................................................................ 96
Maintenance Log ........................................................................................................................ 100
Literature Change History........................................................................................................... 101
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V76270 · Rev. A · 170727