Air Distribution System

Airflow:

Vacuum Harness And Actuators:

Vacuum Controls:

Vacuum Harness (Engine Compartment):

The air is directed into the air distributor assembly. An up/down valve sends air to the heater outlet assembly, up through the air distributor to the A/C or windshield outlets, or to both the heater outlet and the A/C outlets, or the defrost outlets.

The three-position up/down valve is operated by a vacuum actuator. In its relaxed location, the valve is in the middle position allowing air to flow upward through the A/C outlets or windshield defroster, and downward through the heater outlet. When vacuum is applied the valve is pulled downward. This allows air to flow upward through the air distributor to either the A/C outlets or the defroster outlets, but cuts off the flow to the heater outlets. When the valve is pulled upward this allows air to flow downward toward the heater outlets. In all three positions, a small amount of air is directed to the side window defroster outlets and rear seat outlets.

Air flows upward through the air distributor and is directed to either the A/C outlets or the windshield defroster, depending upon the position of the A/C defroster valve. In its relaxed position, the valve is rearward, blocking the airflow to the A/C outlets and directing air to the windshield. When vacuum is applied, the valve will move forward to its actuator, directing the air to the A/C outlets.

Air Conditioning Outlets

Four main outlets are located in the instrument panel, one on the left side, two in the center and one on the right side. A small amount of air is directed to the side window defroster outlets and the heater outlet to cool the floor. The main outlet provides an air flow direction that can be controlled independently. The outlet may be rotated and the knob in the center of each outlet may be adjusted to provide the desired air direction. Airflow from each outlet may be stopped altogether by moving the shut-off lever, next to the outlets to the fully closed position.

Defroster Duct

A unitized defroster outlet delivers air to both sides of the windshield. It is attached to the top of the A/C module and is located on top of the instrument panel.

Heater Outlet

The heater outlet is located along the bottom of the A/C module and near the center of the underside of the instrument panel. It distributes air to the left and right sides of the front floor and also directs air to the rear seating area.

Rear Seat Outlet

Two rear seat outlets are located on the back of the console or on the back of front seat armrest. Each outlet provides an air flow which can be directionally controlled independent of the other.