2004 DACIA SOLENZA oil

62
AIR CONDITIONING
62 - 1
General
The purpose of the air conditioning unit is to produce a decrease of the tempera ture in t he
passengers compartment a nd to obt ain a l ower value tempera ture c ompare d to the e xterna l
environment one, reducing in the same time the air moisture.
MAINTENANCE
For a vehicle equipped with air conditioning, 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, replace the dryer filter tank and drain
the unit; 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 prolong
the lifetime of t he compressor and of the whole system.
T he vehicle equipped with an air c onditioning system shall be not exposed for more
than 20 minutes i n painting c abin where there are temperatures higher than 80 °C.
It is obligatory the use of t he refrigerating agent and compressor oil type prescribed
by the manufacturer.
It is absolutely forbidden to perform welding works on the elements of the ai r condition
circ uits.
The fi lling of the air c onditioning system c an be pe rformed only by means of c harging
units and observing the instructions of the manufacturer. For mechanical or body
operations it is recommended piping protection in order to avoid t heir disconnection
by accident.
Avoid the drip of the oil compressor on the painted vehicle carriage body.
For component replacement implying t he circuit draining, it is absolutely necessary
the use of new parts and of a special oil for compressor.
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62
AIR CONDITIONING
62- 2
AIR COND
ITIONING UNIT
GENERAL METHOD OF O NE ELEMENT REPLACEMENT OF THE AIR CONDITONING UNIT
DISMOUNTIN G
Make the unit functioning for at least 10 minutes (if the unit permits).
Drain the circuit in the charging 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.
REMOU NT I NG
Apply special compressor oil on the new e lements thread and on the gaskets.
AT TENTION !
T he new components must be obligatory provided with protection covers.
Remove the protection covers, connect t he new component on the free connection,
and tighten it by hand.
Place the component correctly.
Tighten it to the required moment.
Refi ll with refrigerant fluid and oil recommended by the manufacturer.
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...............................100 ml
- condenser re placement ............................................................................... 30 ml
- evaporator replacement............................................................................... 30 ml
- dryer filter replacement................................................................................ 15 ml
- pipe re placement......................................................................................... 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.
Compressor oil : PAG SP 10 135 cmc
Refrigerant fluid : HFC 134a 0.6 Kg
General
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62
AIR CONDITIONING
62 - 3
Draining – filling the refrigerant circuit
DRA I NING
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.
FILLIN G
Attach the draining – filling hoses of the equipment to the air conditioning unit valves.
Put compressor specific oil t ype SP 10 in the charging equipment vessel.
Set the quantity of the refrigerant fluid that must be charged (0,6 Kg).
Observe the filling instructions prescribed by the equipment producer.
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62
AIR CONDITIONING
62- 12
Compressor
FUN CTION
The compressor is suction the vapors com-
ing from evaporator at low temperature and
pressure, compress them and transmit the gas
at high temperature and pressure towards con-
denser. The refrigerant fluid in entering in condenser
in vapors condition, at high temperature and
pressure, where, by condensing, is transmittin g
in the external environment the abstracted heat.
At condenser exit, the refrigerant fluid is in
liquid condition, at high pressure and tempera-
ture.
DISMOUNTIN G
Drain the refrigerant c ircuit t o a charging
station.
Disconnect the battery.
Disconnect the supply wiring connector of
the compressor clutch.
Dismount the screw of attachment clamp
of the refrigerant pipes on compressor.
Cover the open piping with protectors.
Dismount the compressor-driving belt.
Dismount the four compressor attachment
screws.
Extract the compressor.
REMOU NT I NG
In case compressor is replaced, this one is
delivered filled with oil. Position the compressor with the filling cap
upwards. Mount the compressor attachment screws.
Tighten the compressor attachment screws
to the required moment of 2,1 daNm.
Remount the two refrigerant pipes and
tighten t he attachment clamp screw to the re-
quired moment of 1,2 daNm.
Mount the compressor -driving belt and ten-
sion it by acting upon the screw ( 1) according
to the method descri bed in chapter 07 “ Ac-
cessories belts tensioning”.
The tensioning values are :
150 - 155 Hz - compressor belt;
214 – 230 Hz – DA pump/compressor belt.
Connect the supply wire connector of the
compressor clutch. Vacuum and fill the circuit with refrigerant
fluid HFC 134a , by means of the charging sta-
tion (see chapter 62 “Draining – Filling unit
refrigerant circuit” ).
REMARK :
Before mounting c heck t he condition
of t he gaskets and lubri cate them wi th
compressor oil PAG SP 10.
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62
AIR CONDITIONING
62 - 13
Condenser
SPECIAL TOOLS
MOT 453Hoses clamp
MOT 1202-01 Elastic clips pliers
The condenser is placed on the c ooling
radiator, ensuring the exhaust of the refrigerant
heat accumulated at compression.
DISMOUNTING
Disconnect the battery.
Drain the AC unit and recover t he oil and
the refrigerant fluid at the charging station.
Dismount the front grill.
Dismount the air filter inlet pipe.
Dismount the engine fan off the radiator.
Disconn ect the pipes from the condenser and
immediately close the disconnected pipes ends
and the condenser connections with protection
caps in order to avoid humidity and impurities
penetration in circuit.
Clamp the hoses from the radiator by means
of the MOT 453 device.
Di smount the hoses from the radiator by
means of the elastic clips pliers MOT 1202-01 ,
recovering the cooling fluid.
Dismount the radiator side attachment
supports on the radiator upper cross beam and
release the radiator together with the condenser.
Re l e a se t he condense r f rom t he four
attachment screws on the radiator.
REMOU NT I NG
Perform the dismounting operations in the
reverse order.
Tighten to t he required m oment the pipes
nut s .
- thread 3/4 “ 1,8 – 2,2 daNm
- thread 5/8 “ 1,0 – 1,4 daNm
Fill the AC unit with refrigerant fluid HFC
134a (0,600 Kg) by means of the charging unit.
Check for refrigerant fluid leaks.
Fill and purge the cooling circuit.
Check the good operation of the AC unit.
REMARK :
When mounting, line up the marks of
the hoses and mating parts .
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62
AIR CONDITIONING
62- 14
Pressure controller
LOCATION
Pressure controller (1) is located on the high-
pressure pipe, near the dryer reservoir.
FUNCTION
The pre ssure control ler is perm anently
informing UCE (electronic control unit) about
the circuit pressure. Subject to pressure value in the high-
pressure circuit, UCE is commanding:
- circuit break ( by uncoupling the compressor
clutch) when the pre ssure in the c ircuit is
decreasing under 1,96 + /-0,2 bar a nd clutch
coupling when the pressure is over 2,16 +/-
0,2 bar;
- circuit break when the pressure in the circuit
is over 31,4 +/- 2 bar and compressor clutch
coupling when the pressure is decreasing under
25,5 +/- 2 bar;
- engine fan starting on second speed, when
the pressure is over 17,7 +/- 1 bar and engine
fan stopping when the pressure is decreasing
under 13.7 +/- 1 bar.
REPLAC EMEN T
The pressure controller replacement does
not imply the draining of the refrigerant circuit. Disc
onnect the pressure controller
connector.
Replace the pressure controller.
When m ounting, lubricate the pressure
controller sealing gasket with oil PAG SP 10.
T ighten the pressure controller to the required
moment of 0,9 +/- 0,1 daNm.
Check for refrigerant fluid leaks.
1
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62
AIR CONDITIONING
62 - 15
Filter reservoir
Filter reservoir (1) is attached by means of a
support collar on the right longitudinal girder.
Its function in the AC unit operation is : -filtering the refrigeran t fluid;
-r etaining the humidity from the unit;
-f orming of a buffer stock of refrigerant
fluid.
The particles interception is necessary because
it might block the thermostatic expansion vale
operation or produce compressor mobile parts
wear or gripping. The filter reservoir is not to be repaired.
DISMOUNTIN G
Disconnect the battery.
Drain the AC unit.
Dism ount t he pi pi ng a nd pro t e c t wi t h
protection caps in order to avoid humidity
penetration. Dismount the filter reservoir off the support
collar and release it.
REMOU NT I NG
Perform the dismounting operations in the
reverse order. Fill the AC unit with refrigerant fluid HFC
134a (0,600 Kg) by means of the c harging
station.
Check for refrigerant fluid leaks.
When replacing the filter reservoir, fill in
the circuit with 15 ml of oil PA G S P 10 .
REMARK
The tightening required moment of
the pipes nuts at the filter reservoir is of
1,4 –2 daNm.
The required tightening moment of
the attachmen t screw of the filter
re servoir support is of 0,7 daNm.
1
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62
AIR CONDITIONING
62- 16
Unit piping
TIGHTENING MOMENTS(daNm)
Pipe attachment nut 3/4’’on condenser 1,8-2
Pipe attachment nut 5/8’’on condenser 1-1,4
P ipes attachment screw on compressor 1,2
Pipes attachment nut on evaporator 0,57
The AC unit piping is ensuring the refrigeran t
fluid circulation between the unit components.
When piping is replaced, check the existence
of the protective caps, the l ubrication of the
connections and gaskets with compressor oil.
The unit fillin g and draining valves are placed
on the c ompressor piping a nd they different
diameters, so that they can not be reversed.
COMPRESSOR – EVAPORATOR
LO W PRESSURE PIPE
DISMOUNTIN G
Disconnect the battery.
Drain the AC circ uit by means of the
charging unit.
Dismo unt :
-atta chme nt nu t ( 9) of t he pi pe s
tightening clamp on evaporator ( 8) (located in
DSAF); -attachment screw ( 6) of the pipes
tightening clamp on compressor ( 5);
- attachment screw (7) of pipes clamp.
Release the pipe ( 10) and mount protection
caps at its extremities, at evaporator and
compressor.
R EMOU NT I NG
Perform the dismounting operations in the
reverse order.
Replace the gaskets from pipe’s extremities.
Before m ounting, t he ga skets are to be
lubricated with oil PAG SP 10.
In case pipe ( 10) is replaced, add 10 ml of
oil PA G S P 10, and in case of its breaking,
100 ml.
COMPRESSOR – CONDENSER
HIGH PRESSURE PIPE
DISMOUNTIN G
Disconnect the battery.
Drain th e AC circu it by means of the
charging unit. Dismo unt :
- front grill;
-atta chme nt sc rew (6) of t he hi gh
pressure pipe (4) on compressor (5);
-pipe attachment nut on condenser ( 12);
-pipe att achment clamp ( 11) on
condenser.
7
1
10
9
13
3 4
12 6
5
11 8
2
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