Table of Contents
Codes and Ordinances ............................................................................................................... 14
Receiving Unit ........................................................................................................................... 14
Storage ....................................................................................................................................... 15
Chiller ........................................................................................................................................ 15
Wiring Diagrams ....................................................................................................................... 16
General Maintenance ................................................................................................................. 16
Chiller Primary Pumping .......................................................................................................... 16
Automatic Air Vent ................................................................................................................... 17
Dual Pumps ............................................................................................................................... 17
Pressure Gauges and Thermometers ......................................................................................... 17
Pipe Insulation ........................................................................................................................... 17
Chiller Placement ...................................................................................................................... 18
Curb and Steel Mount Installation ............................................................................................ 18
Lifting and Handling ................................................................................................................. 19
Water Connection ...................................................................................................................... 21
Mounting Isolation .................................................................................................................... 21
Access Doors ............................................................................................................................. 21
End Flashing Installation ........................................................................................................... 21
Low Ambient Operation ............................................................................................................ 22
Electrical .................................................................................................................................... 22
Variable Speed Compressors .................................................................................................... 24
Axial Flow Condenser Fans ...................................................................................................... 26
General ...................................................................................................................................... 29
Compressors .............................................................................................................................. 29
Refrigerant Suction Line Filter ................................................................................................. 29
Suction Filter Removal Instructions .......................................................................................... 29
Adjusting Refrigerant Charge ................................................................................................... 30
Lubrication ................................................................................................................................ 33
Air-Cooled Condenser ............................................................................................................... 33
Brazed Plate Heat Exchanger Cleaning .................................................................................... 33
E-Coated Coil Cleaning ............................................................................................................ 33
Microchannel Coil Cleaning ..................................................................................................... 36
Service ....................................................................................................................................... 38
Replacement Parts ..................................................................................................................... 38
AAON Technical Support ......................................................................................................... 38
Automatic Air Vent Valves ....................................................................................................... 39
Pumps - Installation and Operating Instructions ....................................................................... 41
Pump Piping - General .............................................................................................................. 42
Pump Operation ......................................................................................................................... 43
General Care .............................................................................................................................. 44
Dual Pump Specific Information ............................................................................................... 46
Suction Guides .......................................................................................................................... 51
Flo-Trex Combination Valve .................................................................................................... 52