Section III. Technical Principles of Operation

TM 5-4120-339-14

CONDENSER FAN (1). The condenser fan draws ambient air from outside. The air flow over the condenser

coil and is exhausted to the outside.

CONDENSER COIL (2). Air drawn through the condenser coil by the condenser fan cools the refrigerant

inside the condenser coil.

Figure 1-4. Right rear three-quarter view, location and description of major components

Section III. Technical Principles of Operation

1-13.

PRINCIPLES OF OPERATION.

a. General. The air conditioner is a fully self-contained unit capable of providing cooling, heating or ventilation to

the conditioned area.

b. Cooling.

(1) The cooling section consists primarily of a compressor, high and low pressure cut-out switches,

condenser coil, evaporator coil, and a fan motor which operates both a condenser fan and an evaporator fan on a

common shaft. When the selector switch is placed in the "COOL" position, the fan motor and the compressor start. The

cooling section is under control of the thermostat, which serves to maintain the temperature of the conditioned area at the

desired level.

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