Dacia Pick-Up 1304/1305/1307. Service manual - part 121

AIR  CONDITIONING

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R

EMOUNTING

Perform the dismounting operations in  the reverse order.
Fill the refrigerant circuit and check the good operation of the climate control system.

NOTE :

Ensure that evaporator finned plates are not deformed and they are not excessive

dirty.

ATTENTION !

For mounting or remounting the piping connections from refrigerant circuit, use

two wrenches to balance the tightening moment in order to avoid the piping spin-
ning.

EVAPORATOR

AIR  CONDITIONING

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The air conditioning system piping ensure the refrigerant fluid circulation between the system

components.

When pipes are replaced, check the existence of the protective covers. Lubricate the con-

nections and gaskets with compressor oil and fill up with compressor oil.

The system filling and draining valves are placed on the compressor piping and have different

diameters, so that they can not be reversed.

When one air conditioning pipe is replaced, it is compulsory that its mounting to be performed

immediately after dismounting the protection cover.

Piping compressor – condenser ................................

13/32”

Piping compressor – evaporator ................................

1/2”

Piping condenser - tank filter  ............................... 5/16”
Piping tank filter – evaporator ....................................

5/16”

SYSTEM PIPING

AIR  CONDITIONING

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REPLACEMENT THE THERMOSTATIC EXPANSION VALVE

D

ISMO UNTING

Clean the anti-condense sealant material.
Dismount the refrigerant fluid piping attachment flange (1) on the thermostatic expansion valve.
Mount protection covers at the two refrigerant fluid pipes.
Dismounting the thermostatic expansion valve
Replace the thermostatic expansion valve.

R

EMOUNTING

Perform the dismounting operations in  the reverse order.
Lubricate the connections and sealing gaskets (“ O”  rings ) with compressor oil,

 PAG – SP 10.

Mount the anti-condense sealant material over the refrigerant fluid pipes from the thermostatic

expansion valve.

Thermostatic expansion valve – allows the reduction of the refrigerant liquid which is

coming from the condenser, passing through the tank filter and is continuously adjusting the
 refrigerant flow from the evaporator, to reach the compressor in gaseous shape.

The good operation of the air conditioning system is ensured by a dryer filter tank which has

the purpose to protect  the unit by absorbing the eventually solid particles found in the oil  and
refrigerant liquid circulation, if not, these might block the operation of the thermostatic expansion
valve or may produce the compressor mobile parts worn or gripping.

Refrigerant

:  HFC 134 a

Quantity of refrigerant

:  0,700 kg.

Compressor oil

:  PAG SP 10

Quantity of compressor oil

:  265 cmc.

THERMOSTATIC EXPANSION VALVE

AIR  CONDITIONING

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PRESSURE CONTROLLER

The pressure controller is mounted on the dryer filter tank.
The pressure controller is an electric/mechanical device, which has the purpose to protect the

air conditioning unit and it has the following functions:

- cuts off the compressor operation, when the pressure in the high pressure circuit is low-

ering more than 2,5 bars.

- cuts off the compressor operation, when the pressure in the high pressure circuit is more

than 27 bars.
starts the cooling GMV, when the pressure in the high pressure circuit is more than
 16 bars and cuts off the GMV when the pressure is lowering more than 12 bars.

                          PRESSURE CONTROLLER REPLACEMENT

      D

ISMO UNTING

The dismounting of pressure controller may be performed without draining the refrigerant

circuit.

Disconnect the battery.
Disconnect the connector (1) of the pressure controller.
Dismount the pressure controller (2).

R

EMOUNTING

Perform the dismounting operations in  the reverse order.
Tightening at the required moment the pressure controller (0,7daNm).

PRESSURE CONTROLLER