System Airflow

FRESH AIR FLOW
The system pulls outside (ambient) air through the cowl opening at the base of the windshield. The air then goes into the plenum chamber above the heater A/C unit housing and passes through the evaporator. At this point the air can be directed either through, or around the heater core. This is done by adjusting the blend air door with the TEMP control on the control head. After the air passes the blend air door, the air flow can be directed from the PANEL, BI-LEVEL (panel and floor), and FLOOR-DEFROST outlets. Air flow velocity can be adjusted with the blower speed selector switch located on the control head.

RECIRCULATING AIR
Ambient air can be shut off by closing the recirculating air door. This will recirculate the air that is already in the vehicle. This is done by rotating the mode control knob on the control head.

COMPRESSOR ENGAGEMENT
Rotating the knob to the Defrost/Floor or Defrost setting will engage the compressor. This will send refrigerant through the evaporator, and remove heat and humidity from the air before it goes through the heater core. The compressor can also be engaged by depressing the A/C button on the control head.