Figure 1-3. Right front three-quarter view, location and description of major components

TM 5-4120-339-14

HEATER ELEMENTS (1). Consists of six electrical resistance heaters mounted directly behind the evaporator

coil. The heater elements provide two ranges of heating.

EVAPORATOR COIL (2). Heat is absorbed from the air passing over the evaporator coil by the refrigerant

passing through it. This action serves to cool the air as it flows through the evaporator coil.

TEMPERATURE BULB (3). Senses air temperature over the evaporator coil to maintain an even temperature

of cooling air into the conditioned area.

EVAPORATOR FAN (4). The evaporator fan draws air through an filter, over the evaporator coil mounted in the

evaporator section, and exhausts it into the conditioned area.

CONTROL PANEL (5). The control panel contains the manual thermostat control, the fan speed switch, and

selector switch for controlling cooling, heating or ventilation, fan speed, temperature and mode of operation.

COMPRESSOR (6). A hermetically sealed electric motor driven compressor is used for pumping refrigerant

through the system.

Figure 1-3. Right front three-quarter view, location and description of major components

1-5