TM 9-2330-246-14
2-16. OPERATING AIR CONDITIONER (M373A2D) (Con't).
(4) Place circuit breaker on remote control panel to ON position.
(5) Place selector knob on remote control panel to VENTILATION position.
(6) To stop ventilating action, turn selector knob and circuit breaker to OFF positions and close air
damper, filter panel, and front door panels.
c. Operating Air Conditioner for Cooling.
(1)
Open hinged panels on front door of semitrailer.
(2)
Place selector knob on remote control panel to COOLING position.
(3)
Place circuit breaker on remote control panel to ON position.
(4)
To stop cooling action, place selector knob and circuit breaker to OFF positions and close front
door panels.
2-17. OPERATING AIR CONDITIONER (M373A3, M373A4, AND M373A5).
a. General. The M373A3, M373A4, and M373A5 semitrailers are equipped with one model MA3-F23A,
208-volt, three-phase 60 Hz, 36,000 BTU air conditioner, mounted in the front of the semitrailer. The thermostatic switch
on the M373A5 semitrailer is mounted on the left sidewall, adjacent to the heater thermostatic switch. A check valve is
located in the drain line to prevent water from backing up into the unit during fording operation. Refer to
TM 5-4120-259-15 for operation, service, and maintenance instructions for the air conditioner.
b. Operating Air Conditioner for Ventilation.
(1) Open front panel.
(2) Open both air discharge opening covers located on each side of kingpin.
(3) Turn rotary control switch to FAN position.
(4) Adjust damper to admit fresh air as desired.
(5) To stop ventilating action, turn rotary control switch to OFF position and close damper, air discharge
opening covers, and front panel.
c. Operating Air Conditioner for Cooling.
(1) Open front panel.
(2) Open both air discharge opening covers located on each side of kingpin.
(3) Set thermostatic switch for desired temperature and turn rotary control switch to COOL position.
NOTE
For maximum cooling capacity when outside temperature is high, set damper controls
at full MIN position.
(4) Turn damper control knobs to desired position, from MIN (100 percent return air) to M A X
(100 percent fresh air).
(5) To stop cooling action, turn rotary control switch to OFF position and close air discharge opening
covers and front panel.
2-16