Dacia Pick-Up 1304/1305/1307. Service manual — part 121
AIR CONDITIONING
62
62 - 12
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
62
62 - 13
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
62
62 - 14
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
62
62 - 15
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст