4
V. Principles of Operation
The main component of the heat exchangers is counterflow aluminum element through
which heat transfer occurs.
Ambient blower draws ambient air from the bottom inlet through an aluminum mesh air
filter, through the element and exhaust it through a discharge grill.
Cabinet blower draws cabinet air from the top inlet through the element and exhaust it
through the bottom discharge into the cabinet.
Blower
Ambient Air
with
Heat Load
Heat
Exchanger
Cooled Air
Cabinet
Blower
Heated Air
Ambient
Air
In an Air-to-Air Heat Exchanger, heat from air surrounding the
components is removed by a specially designed heat transfer
element before being routed back into the enclosure. Optional
bimetal thermostat is used as Cooling Effect Detector. The
thermostat contacts close at 130°F and open at 90°F.
Major Component Replacements
KNHX32
KNHX32E
Condenser Blower Assembly
604532-00-59
Condenser Blower Capacitor
0452-03
Condenser Blower Blower Motor
0261-120
Evaporator Blower Assembly
604532-00-60
Evaporator Blower Capacitor
0452-03
Evaporator Blower Blower Motor
0261-120
Filter
800F
Above parts are for 115V units. For 230V, consult factory.
