3
Table of Contents
Safety .............................................................................................................................................. 6
LN Series Feature String Nomenclature ....................................................................................... 10
General Information ...................................................................................................................... 15
Codes and Ordinances ............................................................................................................... 15
Receiving Unit ........................................................................................................................... 15
Storage ....................................................................................................................................... 15
Chiller ........................................................................................................................................ 16
Wiring Diagrams ....................................................................................................................... 17
General Maintenance ................................................................................................................. 17
Chiller Primary Pumping .......................................................................................................... 17
Automatic Air Vent ................................................................................................................... 17
Dual Pumps ............................................................................................................................... 18
Pressure Gauges and Thermometers ......................................................................................... 18
Pipe Insulation ........................................................................................................................... 18
Installation..................................................................................................................................... 19
Chiller Placement ...................................................................................................................... 19
Curb and Steel Mount Installation ............................................................................................ 19
Lifting and Handling ................................................................................................................. 20
Water Connection ...................................................................................................................... 22
Mounting Isolation .................................................................................................................... 22
Access Doors ............................................................................................................................. 22
End Flashing Installation ........................................................................................................... 22
Low Ambient Operation ............................................................................................................ 23
Electrical .................................................................................................................................... 23
Startup ........................................................................................................................................... 25
Axial Flow Condenser Fans ...................................................................................................... 26
Maintenance .................................................................................................................................. 29
General ...................................................................................................................................... 29
Compressors .............................................................................................................................. 29
Adjusting Refrigerant Charge ................................................................................................... 29
Lubrication ................................................................................................................................ 33
Air-Cooled Condenser ............................................................................................................... 33
Brazed Plate Heat Exchanger Cleaning .................................................................................... 33
E-Coated Coil Cleaning ............................................................................................................ 33
Recommended Coil Cleaner .................................................................................................. 34
Recommended Chloride Remover ......................................................................................... 34
Microchannel Coil Cleaning ..................................................................................................... 35
Service ....................................................................................................................................... 35
Replacement Parts ..................................................................................................................... 35
AAON Warranty, Service and Parts Department ...................................................................... 35
Appendix - Water Piping Component Information ...................................................................... 36
Automatic Air Vent Valves ....................................................................................................... 36
Pumps - Installation and Operating Instructions ....................................................................... 38
