3
Table of Contents
AAON
®
RN Series Features and Options Introduction .............................................................. 8
Safety...................................................................................................................................... 9
RN Series Feature String Nomenclature ..................................................................................15
General Information ...............................................................................................................27
Codes and Ordinances.........................................................................................................27
Receiving Unit....................................................................................................................28
Storage ...............................................................................................................................28
Wiring Diagrams ................................................................................................................28
Installation .............................................................................................................................29
Locating Units ....................................................................................................................29
Setting the Curb ..................................................................................................................30
Forklifting the Unit (6-25 and 30 ton) ..................................................................................37
Lifting the Unit ...................................................................................................................37
Duct Connection .................................................................................................................40
Seismic Curb Installation ....................................................................................................41
Outside Air Rain Hood .......................................................................................................43
End Flashing Installation.....................................................................................................44
Metal Mesh Filters (6-25 and 30 ton Units)..........................................................................44
Electrical ............................................................................................................................45
Variable Speed Compressors ...........................................................................................47
Thermostat Control Wiring..............................................................................................48
Condensate Drain Piping.....................................................................................................48
Draw-Through Coils ...........................................................................................................49
Startup ...................................................................................................................................50
Filters .................................................................................................................................50
Supply Fans........................................................................................................................50
Power Return Axial Flow Fans (16-25 and 30 tons) .............................................................52
Power Return and Exhaust Axial Flow Fans (26 and 31-140 tons) ........................................54
Adjusting Refrigerant Charge ..............................................................................................55
Checking Liquid Sub-Cooling .........................................................................................56
Checking Evaporator Superheat.......................................................................................56
Adjusting Sub-cooling and Superheat Temperatures.........................................................57
Freeze Stat Startup ..............................................................................................................57
Condenser Fan Electronically Commutated Motor (ECM) Startup ........................................59
VFD Controlled Condenser Fan Startup...............................................................................59
Adjustable Fan Cycling Switch Procedure ...........................................................................60
Operation ...............................................................................................................................62
Thermostat Operation .........................................................................................................62
Packaged DX Cooling Operation and Control ......................................................................62
Gas Heater Operation..........................................................................................................62
Electric Heating Operation ..................................................................................................63
Steam or Hot Water Preheating and Heating Operation ........................................................63
Modulating Electric Preheat ................................................................................................63
Chilled Water or Non-Compressorized DX Cooling Operation .............................................63
Maintenance ...........................................................................................................................63
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