TM 9-4120-405-13&P
Section I. DESCRIPTION AND USE OF OPERATOR'S CONTROLS AND INDICATORS
2-1. GENERAL. For specific usage of controls and indicators on the air conditioner, refer to TM 5-4120-384-14: for the
generator-set, refer to TM 5-6115-585-12: and for the trailer, refer to TM 9-2330-202-14&P.
a. Air Conditioner. The air conditioner is designed for a wide variety of installations and for operation under a wide
range of climatic conditions. It is also designed for continuous or intermittent operation as a self-contained unit or may be
connected to external filtering equipment for operation under nuclear, biological, and chemical (NBC) environmental
conditions. Operators must be aware of any peculianties or operational limitations for their specific installation.
JUNCTION BOX AND CONTROL PANEL (1). Contains temperature selector switch, power input receptacle
(primary location), control circuit breaker, compressor circuit breaker, high pressure cutout switch, mode selector
switch, and low pressure cutout switch.
INPUT POWER RECEPTACLE (2), (Primary Location). Located on the control panel. For connection of external
power.
INPUT POWER RECEPTACLE (3), (Alternate Location).
Located on the rear of the unit.
For connection of
external power.
VENT CONTROL (4). Located on the front right side. For opening and closing vent.
b. Generator-Set. The generator-set is designed for using different currents, however the only current used In the
trailer-mounted, generator-set powered, air conditioner is for a 3-Phase 120/208 V output with a frequency of 60 Hz.
CONTROL PANEL (5). Contains engine and generator controls.
OIL PRESSURE GAUGE (6). Measures engine oil pressure by 0-50 pounds per square inch (psig).
RECONNECTION SWITCH (7). Preset to 120/208 V, 3 phase output.
LOAD TERMINALS (8). Used to supply power from the generator-set to the air conditioner.
c. Trailer. The trailer has been modified for use with the trailer-mounted, generator-set powered, air conditioner.
DRAWBAR RING (9). Couples trailer to towing vehicle.
LEG PROP ASSEMBLIES (10). Supports trailer when it is not coupled to towing vehicle.
PLUNGER ASSEMBLY (11). Locks leg drop in the up or down position.
SAFETY CHAIN (12). Couples trailer to towing vehicle. If ring accidentally uncouples from towing vehicle, the
safety chain prevents the trailer from running away.
HANDBRAKE LEVER (13). Applies or releases service brake.
BRAKEAWAY LEVER AND CHAIN (14). Applies hydraulic brakes if trailer accidentally uncouples from towing
vehicle.
INTERVEHICULAR CABLE (15). Connects electrical power from the towing vehicle to the trailer's tail lights.
2-2
