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Page Title:
STARTING AND OPERATING INSTRUCTIONS FOR HEATING |
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 TM 9-4120-425-14&P
OPERATION UNDER USUAL CONDITIONS - Continued
0006-00
STARTING AND OPERATING INSTRUCTIONS FOR HEATING
Starting
WARNING
For safe operation the air conditioner must be grounded prior to use.
1.
Perform the preventive maintenance checks and services (WP 0011-00).
2.
Check for the correct voltage and phase (208 volts, three-phase 50/60 Hz).
3.
Roll up and tie canvas cover.
4.
Ground the unit.
5.
Open the evaporator intake louver by moving the blades up or down as required.
6.
Open the evaporator discharge louvers.
7.
Adjust the ventilation damper control chain to close the damper door.
8.
Turn the temperature selector switch from COOLER to WARMER (lowest heating position - counter clockwise).
9.
Position main circuit breaker to ON.
10. Position the mode selector switch to HEAT.
Heating Operation
After starting the air conditioner in the heating mode, adjust it as follows:
1.
Adjust the temperature selector switch from COOLER to WARMER to select the desired temperature. See Table 1
Operator Control Settings. Heaters will cycle to maintain setting of temperature selector switch.
2.
Adjust the evaporator discharge louver blades to direct the airflow as desired.
NOTE
Warm air is less dense than cool air, so it has a tendency to rise. To obtain comfortable temperatures
near the floor and lower parts of the room, it is often advisable to adjust the evaporator discharge
louver blades to direct the air slightly downward.
Heating Operation with Fresh Air
1.
Open the damper door by adjusting the ventilation damper control chain if fresh air is desired.
2.
Partially close the evaporator intake louver blades.
0006-00-4
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