A/C System - Manual

HEATING and DEFROSTING
The heating and defrosting system has the following features:
- Controls the temperature and, during A/C operation, reduces the relative humidity of the air inside the vehicle.
- Delivers heated or cooled air to maintain the vehicle interior temperature and comfort level.
- Cooling or heating can then be adjusted to maintain the desired temperature.
- System uses a reheat method to provide conditioned air to the passenger compartment.
- The blower motor draws outside air through the air inlet duct from just below the windshield during all system operations except for MAX A/C cooling (when recirculated air is used).
- All airflow from the blower motor passes through the A/C evaporator housing.
- The temperature is then regulated by reheating a portion of the air and blending it with the remaining cool air to the desired temperature.
- The temperature blending is varied by the air temperature control door, which regulates the amount of air that flows through and around the heater core in the heater core housing, where it is then mixed and distributed.






AIR CONDITIONING
The A/C refrigerant system is a clutch cycling orifice tube type. The system components are:
- A/C compressor.
- A/C clutch.
- A/C condenser core.
- A/C evaporator core.
- suction accumulator/drier.
- connecting refrigerant lines.

The refrigerant system operation is controlled by the:
- A/C evaporator core orifice.
- A/C cycling switch.
- A/C compressor pressure relief valve.
- A/C pressure cut-off switch.

The refrigerant system incorporates an A/C compressor controlled by an A/C cycling switch.

The A/C cycling switch senses A/C evaporator core pressure to control A/C compressor operation.

An A/C compressor pressure relief valve is installed in the A/C manifold and tube to protect the refrigerant system against excessively high refrigerant pressures.

An A/C evaporator core orifice is installed in the condenser to evaporator tube to meter the liquid refrigerant into the A/C evaporator core.