AAON RL-240 - Manual (Page 3)

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Table of Contents
Safety .............................................................................................................................................. 8
RL Series Feature String Nomenclature ....................................................................................... 13
General Information ...................................................................................................................... 22
Certification of Gas Heat Models ............................................................................................. 22
Certification of Steam or Hot Water Heat Models ................................................................... 22
Certification of Electric Heat Models ....................................................................................... 22
Certification of Cooling Models ............................................................................................... 22
Codes and Ordinances .............................................................................................................. 22
Receiving Unit .......................................................................................................................... 23
Storage ...................................................................................................................................... 23
Packaged Direct Expansion (DX) Units ................................................................................... 23
Gas or Electric Heating ............................................................................................................. 24
Wiring Diagrams ....................................................................................................................... 24
Condensate Drain Pan ............................................................................................................... 24
Installation..................................................................................................................................... 25
Locating Units ........................................................................................................................... 25
Curb Installation ....................................................................................................................... 25
Duct Connection ....................................................................................................................... 26
Lifting the Unit ......................................................................................................................... 27
Reassembling Split Units .......................................................................................................... 29
Electrical Connection of Split Units ......................................................................................... 30
Outside Air Rain Hood ............................................................................................................. 30
End Flashing Installation .......................................................................................................... 30
Vestibule Exhaust Fan .............................................................................................................. 31
Electrical ................................................................................................................................... 31
Gas Heating ............................................................................................................................... 33
Piping Sizing Example .......................................................................................................... 33
Inlet and Manifold Pressures ................................................................................................ 33
Gas Pressure Regulator & Overpressure Protection Device ................................................. 34
Piping Supports ..................................................................................................................... 34
Additional Gas Piping Considerations .................................................................................. 34
Leak Testing .......................................................................................................................... 34
Rain Hoods ............................................................................................................................ 35
Condensate Drain Piping .......................................................................................................... 36
Draw-Through Coils ................................................................................................................. 37
Hot Water/Steam Heating and Chilled Water Cooling Coils ................................................... 38
Evaporative-Cooled Condenser ................................................................................................ 38
Startup ........................................................................................................................................... 40
Supply, Return, and Exhaust Backward Curved Fans .............................................................. 40
Airflow Adjustment .............................................................................................................. 40
Power Return and Exhaust Axial Flow Fans ............................................................................ 41
RL Prop Assembly .................................................................................................................... 43
Spring Isolator Adjustment ....................................................................................................... 43
Back Draft Damper Setup ......................................................................................................... 44
Filters ........................................................................................................................................ 45