Contents: Technical data ⇓ General information ⇓
Technical data
Data | Meaning |
| Maximum heating power, kcal/h | 4500 |
| Maximum cooling capacity, kcal/h | 4100 |
| Compressor | |
| HS–15 |
| 140–160 |
| Safety valve | |
| 35,0–42,2 |
| min 28.1 |
| Magnetic clutch | |
| 54 |
| 4,4 |
| Triple pressure sensor | |
| OFF: 32, DIFF: 26 |
| OFF: 14, DIFF: 18 |
| OFF: 2,0, DIFF: 2,25 |
| Coolant | |
| R134a |
| 600±25 |
General information
The compressor, driven by the vehicle's engine, compresses the gaseous refrigerant to high pressure, causing the temperature of the refrigerant to rise significantly. The compressed and heated refrigerant is then fed to the condenser, which is installed on the radiator of the cooling system. The condenser cools the gaseous refrigerant, which turns into a liquid. The liquid refrigerant enters the receiver/dryer where the water is separated from it, then delivers the liquid to the evaporator located in the heater unit in the vehicle's interior. In the evaporator, the liquid refrigerant evaporates, turning into a gaseous state, and reduces the temperature of the air entering the cabin. The gaseous refrigerant then enters the compressor and the cycle repeats again.
The air conditioner relay controls the electrical circuits of the condenser fan and the air conditioner compressor. The relay is controlled by the engine control unit. If the coolant exceeds a certain temperature, the engine control unit turns off the relay, causing the air conditioning system to turn off. When the engine is started or the vehicle accelerates, the engine control unit switches off the relay, causing the air conditioning system to switch off for 5 seconds.
The fan blows air through the evaporator core, resulting in increased flow of cooled air into the vehicle's interior. The fan speed is determined by the position of the fan switch and the resistor block.
The air conditioning compressor is the primary element of the air conditioning system. If the air conditioning compressor fails, there is no compression and movement of refrigerant through the air conditioning system circuit. The air conditioning compressor is driven by a belt from the crankshaft pulley.
The air conditioning compressor clutch engages the compressor. The clutch has electromagnetic control.
The condenser is installed in front of the radiator. The condenser fan increases air flow through the condenser.
The fan/evaporator assembly contains the fan motor, air conditioner relay, evaporator core and expansion valve.
The evaporator core performs the functions of cooling and drying the air. When the air cools, moisture from the air is deposited on the evaporator and cooled dry air enters the car interior.
The expansion valve allows the high pressure liquid refrigerant to expand as it enters the evaporator. The valve allows a certain amount of liquid refrigerant to pass through to prevent flooding of the evaporator.
The dried air can be reheated by passing through the heater core. The heater radiator is heated by hot coolant passing through it.
The receiver/dryer receives liquid refrigerant from the condenser, where water is removed from it and then the refrigerant flows to the evaporator.
The air conditioning system is filled with R-134a refrigerant.