Table of Contents
Safety .............................................................................................................................................. 8
RN Series Feature String Nomenclature ....................................................................................... 13
General Information ...................................................................................................................... 24
Codes and Ordinances .............................................................................................................. 24
Receiving Unit .......................................................................................................................... 25
Packaged Direct Expansion (DX) Units ................................................................................... 26
Gas or Electric Heating ............................................................................................................. 27
Wiring Diagrams ....................................................................................................................... 29
Condensate Drain Pan ............................................................................................................... 29
Installation..................................................................................................................................... 30
Locating Units ........................................................................................................................... 30
Setting the Curb ........................................................................................................................ 31
Forklifting the Unit (6-25 and 30 ton) ...................................................................................... 37
Lifting the Unit ......................................................................................................................... 37
Duct Connection ....................................................................................................................... 41
Seismic Curb Installation .......................................................................................................... 42
Outside Air Rain Hood ............................................................................................................. 46
End Flashing Installation .......................................................................................................... 47
Metal Mesh Filters (6-25 and 30 ton Units) ............................................................................. 48
Electrical ................................................................................................................................... 49
Variable Speed Compressors ................................................................................................ 51
Thermostat Control Wiring ................................................................................................... 51
Gas Heating ............................................................................................................................... 52
Piping Sizing Examples ........................................................................................................ 54
Inlet and Manifold Pressures ................................................................................................ 54
Gas Pressure Regulator & Overpressure Protection Device ................................................. 54
Piping Supports ..................................................................................................................... 54
Additional Gas Piping Considerations .................................................................................. 55
Leak Testing .......................................................................................................................... 56
Refrigerant-to-Water Heat Exchanger ...................................................................................... 58
Water-Source Heat Pump Applications ................................................................................ 58
Open Loop Applications ....................................................................................................... 58
Freezing Water in the Heat Exchanger ................................................................................. 59
Water Piping ......................................................................................................................... 59
Condensate Drain Piping .......................................................................................................... 61
Heating Coils ............................................................................................................................ 62
Chilled Water Coil .................................................................................................................... 62
Electric Preheat ......................................................................................................................... 63
Energy Recovery Units ............................................................................................................. 63
Startup ........................................................................................................................................... 71
Supply Fans ............................................................................................................................... 71
Power Return Axial Flow Fans (16-25 and 30 tons) ................................................................ 72
Power Return and Exhaust Axial Flow Fans (26 and 31-140 tons) .......................................... 74
Filters ........................................................................................................................................ 75
Adjusting Refrigerant Charge ................................................................................................... 75
