Air Distribution System

AIR DISTRIBUTION SYSTEM

Airflow:

The airstream is next steered past the rear outlets and 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 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. With vacuum applied (through the yellow vacuum hose to the up/down valve actuator) 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. With vacuum applied (through the red vacuum hose to the up/down valve actuator) the valve is pulled upward allowing 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 flow upward through the air distributor 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 air flow to the A/C outlets and directing air to the windshield. The valve will move forward when vacuum is applied to its actuator, directing the air to the A/C outlets.

AIR CONDITIONING DUCTS
The A/C distributor is fastened to the back of the instrument panel. It receives air through the mode valve opening and channels it to the left, center and right A/C outlets, and rear seat ducts. A small amount of air is directed to the side window defroster outlets and the heater outlet to cool the floor.

AIR CONDITIONING OUTLETS
Four outlets are located in the instrument panel one on the left side, two in the center and one on the right side. Each outlet provides an airstream 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. Air flow may be stopped altogether from each outlet by moving the shut-off lever next to the outlets to the fully closed position.

DEFROSTER DUCT
A unitized defroster outlet delivers defrosting 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
The rear seat outlets are located on the back of the console (Eldorado/Seville) or back of front seat armrest (DeVille/Concours). Each outlet provides an air stream which can be directionally controlled independent of the other.