Power . Power compartment heating .
closed position). Refer to Table 2-1 for valve
Operation Under High Humidity Conditions
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
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