Section 2 (A/C-Heater System - Automatic): Description
Automatic A/C-heater system is a cycling-clutch, fixed orifice tube type. Compressor operation is controlled by A/C cycling switch. A compressor pressure relief valve in compressor manifold and tube assembly protects against excessively high pressures. Fixed orifice tube is in low side refrigerant line at evaporator connection. Evaporator and heater cores are contained in a one-piece housing assembly, mounted under instrument panel. See Fig 1.
An optional auxiliary air conditioning and heating system is available for self-control by rear passengers. Auxiliary unit is located of left side of vehicle, between side window and floorpan, behind rear wheelwell. Both driver and passengers can control auxiliary unit function. Center console has ventilation system for rear passenger. Center console is supplied with air from main housing chamber. A separate blower motor is located in center console. See Figure. Auxiliary A/C system refrigerant lines run beneath the floorpan. See Figure.
Automatic A/C-heater system is controlled through a series of sensors which measure ambient and interior temperatures, sunlight load, and other conditions, and automatically adjusts temperature operations to maintain a preset driver-selected temperature. See Figure. A/C-heater operations can be manually controlled, if needed, by choosing other control panel settings.