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| Illustration 1 | g00944515 |
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| Illustration 2 | g00944516 |
| Fan Speed Switch (1) - This switch operates the three-speed blower fan motor for heating and for air conditioning. Turn the knob anywhere between the OFF position (left) and the THIRD speed position (right). |
| Air Conditioning Control (2) - Use this switch to control the air conditioner temperature. Turn the knob anywhere between MINIMUM position (left) and MAXIMUM position (right). |
| Heating Control (3) - Use this knob to control the heater temperature. Turn the knob anywhere between MINIMUM position (left) and MAXIMUM position (right). |
Air Conditioning and Heating System Operation
The air conditioning and heating system can perform four functions:
Heating - Turn air conditioning control (2) counterclockwise to the MINIMUM position in order to deactivate the air conditioner. Turn heating control (3) clockwise for the desired temperature. Turn fan speed switch (1) to FIRST speed, SECOND speed, or THIRD speed.
Cooling - Turn heating control (3) counterclockwise to the MINIMUM position. Turn air conditioning control (2) clockwise for the desired temperature. Turn fan speed switch (1) to FIRST speed, SECOND speed, or THIRD speed.
Pressurizing - Turn air conditioning control (2) counterclockwise to the MINIMUM position in order to deactivate the air conditioner. Turn heating control (3) counterclockwise to the MINIMUM position. Turn fan speed switch (1) to FIRST speed, SECOND speed, or THIRD speed. The speed of the blower fan depends on the volume of air that is needed in order to keep out the dust. Pressure inside the operator's station will help keep out the dust when heating or cooling is not desired.
Defogging - Turn air conditioning control (2) clockwise to the MAXIMUM position in order to activate the air conditioner. Turn heating control (3) clockwise to the MAXIMUM position. Turn fan speed switch (1) to FIRST speed, SECOND speed, or THIRD speed. The speed of the blower fan depends on the volume of air that is needed in order to remove moisture from the air in the operator's station. Once the windows are free from moisture, adjust the air conditioning control and the heating control until the operator's station is comfortable. This will prevent moisture from forming on the windows.