627F Wheel Tractor-Scraper Caterpillar


Heating and Air Conditioning Control

Usage:

627F 1DL


Illustration 1g00286250
Typicial Example

The heating controls and the air conditioning controls are located on the front dash to the right of the operator.

Temperature Variable Control



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Typical Example

Temperature Variable Control (knob) - This knob will adjust the temperature of the operators compartment. The heating portion of the knob is designated by the color red. Turning the knob all the way to the right will produce the greatest heating effect when the heater is in use. The cooling portion of the knob is designated by the color blue. Turning the knob all the way to the left will produce the greatest cooling effect when the air conditioning is in use. Position the knob for your comfort.

Fan Speed Switch For The Heating and Air Conditioning System



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Heating and Air Conditioning (switch) (2) - This switch is a three-position switch. The center position of the switch is OFF. In order to activate the air conditioner, push the switch to the top position. In order to activate the heater, push the switch to the bottom position.

Fan Speed (switch) (3) - The fan speed switch controls the blower fan motor. This switch is a three-position switch. The top position of the switch is high speed. The center position of the switch is medium speed. The bottom position of the switch is low speed.

Heating and Air Conditioning System Operation

The heating and air conditioning system can perform four functions:

Heating - Activate the heating system. Select your desired fan speed. Adjust the temperature variable control for the desired temperature.

Air Conditioning - Activate the air conditioning system. Select your desired fan speed. Adjust the temperature variable control for the desired temperature.

Pressurizing - When heating or cooling is not desired, pressurize the cab in order to prevent dust from entering.

Turn the temperature variable control all the way to the left for the most cooling. Select a fan speed. Activate the heater control. The cab will be pressurized without being heated. The cab air will be filtered.

Defogging - Activate the air conditioning system. Select a fan speed. Set the temperature control in the warm area.

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