Service manual

Refrigeration
Refrigerant: R-404A
Compressors: Copeland or Tecumseh hermetic
by model
Expansion valve: Non adjustable, internally
equalized.
Condensers: Air is forced draft type, water cooled
is counterflow type.
Air filters: Surface mounted to panels. Filter media
removable without removing panels.
Fan blades: Reduced vibration blades in most air
cooled models.
Remote Systems: Head pressure control valve in
condenser. Headmaster protected by filters (not
filter driers). Controller pumps unit down by closing
the liquid line valve. Pump down switch controls the
compressor..
High pressure cut out. WC, RC, AC
Low pressure cut out, WC, AC
Pump down pressure switch, RC
Evaporator: Coil-wrapped stainless steel with a
stainless steel, double-flight auger inside.
September 2009
Page 19
N0422, F0522, N0622, F0822, N0922, F1222, N1322, F1522
Air, Water or Remote Service Manual