STARTING AND OPERATING INSTRUCTIONS FOR HEATING

TM 9-4120-430-14

0005 00

3. If a shutdown is to be for an extended period, cover condenser side of unit with canvas cover and disconnect the

power cable.

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 0010 00).

2. Check for the correct voltage and phase (208 volts, three-phase, 50/60 Hz for S9160-18KH-3 unit or 230 volts,

single phase, 50/60 Hz for S9150-18KH-1 unit).

NOTE

The J2 connector is the main power input connecter. The J1 connector at the back of

the unit is the ALTERNATE input connector. To use the J1 ALTERNATE

connector, the TB1 connections must be shifted from J2 to J1. Refer to CONNECT

POWER SOURCE procedures in WP 0014 00 and to wiring schematic in WP 0038

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 (ccw).

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.

0005 00-5