Dacia SuperNova (engine E7J). Manual - part 102

AIR CONDITIONING

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GENERALITIES

GENERALITIES

The purpose of the air conditioning unit is to produce a decrease of the temperature in the

passengers compartment and to obtain a lower value temperature compared to the external
environment one, reducing in the same time the air moisture.

MAINTENANCE

For a vehicle equipped with air conditioning, it is recommended a frequent checking of the

refrigerating agent level. During the year it is recommended:

- the checking of the  refrigerant fluid filling;
- the cleaning and the air-blowing of the condenser and the cooling radiator fins;
- the checking of the condensation removal pipe on order not to be clogged.

For important leakage repair, for any components replacement (compressor, condenser, etc)

and if moisture was noticed in the air conditioning circuit, the dryer filter tank is to be replaced
and the unit draining is to be performed. The same is valid also in case the conditioning circuit
remains open without protection covers more than 10 minutes.

IMPORTANT

During winter, it is recommended the frequent start of the system, in order to pro-

long the lifetime of the compressor and of the whole system.

The vehicle equipped with an air conditioning system shall be not exposed for more

than 20 minutes in painting cabin where there are temperatures higher than 80 °C.

It is obligatory the use of the refrigerating agent and compressor oil type prescribed

by the manufacturer.

It is absolutely forbidden to perform welding on the elements of the air condition

circuits.

The filling of the air conditioning system can be performed only by means of charging

units and observing the instructions of the manufacturer. For mechanical or body
operations it is recommended piping protection in order to avoid their disconnection
by accident.

Avoid the drip of the oil compressor on the painted vehicle body.
For component replacement implying the circuit draining, it is absolutely necessary

the use of new parts and of a special oil for compressor.

AIR CONDITIONING

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AIR CONDITIONING UNIT

DISMOUNTING
Make the unit functioning  for at least 10  minutes (if the unit permits).
Drain the circuit at the filling equipment.
Measure the quantity of recovered refrigerated fluid.
Release the access to the component that is needed to be changed.
Disconnect the connections.
In order to avoid the moisture infiltration, protect with protection covers.
Dismount the component.

REMOUNTING
Put special compressor oil on the new elements thread and on the gaskets.

ATTENTION

The new components must be obligatory provided with protection covers.
Remove the protection covers, connect the new component on the free connection,

and tighten it by hand.

Place the component correctly.
Tighten it at couple.
Refill with refrigerant fluid and oil.

The filling up with oil for different repairs is to be performed as follows: add in the charging

equipment container, the recovered oil quantity, plus an oil quantity, as it follows:

- sudden damaged of one of the unit’s element or leakage

100ml

- condenser replacement

30 ml

- evaporator replacement

30 ml

- dryer filter replacement

15 ml

- pipe replacement

10 ml

For compressor dismounting/remounting without replacement add 120 ml.
If there are signs of moisture in the air conditioning circuit, replace the dryer filter tank.

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GENERALITIES

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AIR CONDITIONING

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DRAINING /FILLING THE REFRIGERANT CIRCUIT

DRAINING
Connect the charging equipment piping to the filling-draining valves.
Perform the vacuuming of the air condition unit with the recovering of the oil and the refriger-

ant fluid.

Close the hoses  valves.
Disconnect the charging equipment piping and stop the equipment.

FILLING
Attach the  draining  – filling hoses of the equipment to the air conditioning unit valves.
Put compressor specific oil type SP 10 in the charging equipment vessel.
Set the quantity of the refrigerant fluid that must be charged (0,590kg).
Observe the filling instructions prescribed by the equipment producer.

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GENERALITIES

AIR CONDITIONING

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AC UNIT OPERATING DIAGRAM