Figure 2-26. Power . Power compartment heating .

TM 5-3655-210-12

TS 024504

Figure 2-26.

Power . Power compartment heating .

closed position). Refer to Table 2-1 for valve

2-19.

Operation Under High Humidity Conditions

identification.

(2) Turn on the switch (9, fig. 2-2) to the

conversion heater and the CONVERSION and

High moisture content in the air will cause the most

STORAGE switches (6 and 7) to the gage line heaters.

difficulty in electrical system. The spark plug and

(3) After the conversion heater is operating, turn on

breaker box wiring often becomes unserviceable due to

the SPACE switch (8) to the space heater.

high humidity. The parts that are affected must be

(4) Turn valve 38 to the normal position (90°

removed and dried. If this does not remedy the trouble,

counterclockwise from the position indicated in step (1)).

report to the proper authority.

This will allow the heater fluid to circulate through the

2-20.

Operation In Extreme Heat

piping in the conversion pressure vessel and to the

space heater in the power compartment.

a. General. The operation of the conversion and

(5) When the power compartment is warmed

sufficiently to perform transferring and filling operations,

storage unit in extreme heat will be the same as under

turn valve 39 to the normal position (90°

normal conditions if care is taken t6 prevent

counterclockwise from the position indicated in step (1)

overheating. The automatic controls will operate to

above) and turn off the SPACE switch.

keep the carbon dioxide liquid in the pressure vessels at

(6) The conversion heater is now warming up the

the required pressure, and the entire unit will operate

carbon dioxide in the tank and will continue to operate

successfully at +130F. (54.4C.).

until the pressure in the tank reaches 275 psi (19.3325

b. Cooling. Give extra care and service to the

kg per sq cm). At this pressure, the tank pressure

control switch will open the circuit to stop the heater.

power compartment, for efficient operation.' Open the

refrigeration shutter and the compartment doors. If

necessary, install a circulating fan on the 220-volt

circuit.

2-26