Iveco Daily. Manual — part 346
RESTORING OIL IN THE SYSTEM
If during the recovery and recycle phase, oil from the system
has been removed, it must now be replenished:
- take the metering device supplied with the right amount
of lubricant for the system concerned, or previously
measured;
- connect the metering device (1) to the lubricant injection
valve V3;
- open the valve V3 and then carry out the system vacuum
phase for a few moments;
- open the valve mounted on the metering device
container (1). The oil will be drawn into the system;
- close the valve V3 and the valve on the metering device
container when the required quantity of lubricant has
been drawn in;
- disconnect the metering device (1) from the injection
valve V3 and fit the protective cap back on.
- never open the oil injection valve V3 if the system has
positive pressure;
- oil should only be injected with a vacuum in the system;
- the oil level must never fall under the suction pipe (air
would get into the system).
1
50639
Figure 25
Keep the oil containers well sealed in order to avoid
contamination. In particular, remember that oil is
extremely hygroscopic:.
NOTE
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FILLING THE SYSTEM WITH
REFRIGERANT
Before refilling, it is wise to be aware of some important rules:
- know the quantity of refrigerant to use (it is normally
written on an adhesive plate affixed on the vehicle);
- the filler cylinder is equipped with a minimum level check
that prevents introducing incondensable gas into the
system.
This is why the last approx. 600 g of refrigerant it contains
cannot be used;
- therefore, before filling, check that the cylinder contains
a sufficient quantity for filling (maximum quantity that can
be used 3800 g);
- if the pressure inside the filler cylinder indicated on the
pressure gauge (2) is greater than as required, which can
be seen on the filler cylinder window approx. 10 bar max,
discharge the excess pressure through the valve (1) on
the pressure gauge assembly to bring it down to the right
level, reading the value on the pressure gauge.
2
1
50640
To transfer refrigerant from an external bottle to
the filler cylinder and vice versa, refer to the
equipment manual.
Considering that the amount of refrigerant depends
on its pressure, to know the actual weight it is
necessary to turn the outside of the filler cylinder so
the line of the diagram matches the level viewer. In
this way we can know the exact quantity of
refrigerant in the cylinder (starting weight).
When calculating the weight of the refrigerant, in
addition to the 600 g that cannot be used,
remember to increase the load by approximately
100 g (this is the weight of refrigerant contained in
the station-system connecting pipes). The right
quantity of refrigerant to introduce into the system
will therefore be given by: 600 g + 100 g + (quantity
referred to the system capacity).
Always check before filling that the indicator on the
”console” shows the refrigerant contains no
moisture, in which case the indicator will be bright
green. If this is not so, replace the filters in the station
as instructed in the equipment manual.
Figure 26
NOTE
Revi - February 2005
CAB AIR-CONDITIONING
27
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COMPRESSOR
R134 COULANT
QUANTITY PROVIDED
FOR IN SYSTEM
COULANT
QUANTITY CONTAINED
IN THE PIPINGS
(150 cm length)
THAT ARE USED FOR
RECHARGING
COULANT TOTAL
QUANTITY TO BE SET
ON CHARGING TOOL
OIL QUANTITY TO BE
ADDED INTO SYSTEM
AT EACH ND 8 TYPE
CHARGING
DAILY (8140 engine):
WITH CAB, VAN, SPECIAL
ITEMS, 6+1
SC 08
OPT 6650
720 g
100 [g] for low pressure
pipe, 100 [g] for high
pressure pipe
1020 g
30 g
DAILY (8140 engine):
WITH CAB, VAN, SPECIAL
ITEMS, 6+1
DENSO 10 PA 17
OPT 6652
720 g
100 [g] for low pressure
pipe, 100 [g] for high
pressure pipe
1020 g
40 g
DAILY (F1A engine):
WITH CAB, VAN, SPECIAL
ITEMS, 6+1
DENSO 10 PA 17
OPT 6652
720 g
100 [g] for low pressure
pipe, 100 [g] for high
pressure pipe
1020 g
40 g
DAILY (F1A engine):
COMBI
DENSO 10 PA 17
OPT 6652
1200 g
100 [g] for low pressure
pipe, 100 [g] for high
pressure pipe
1500 g
40 g
DAILY (F1C engine):
WITH CAB, VAN, SPECIAL
ITEMS, 6+1
DENSO 10 PA 17
OPT 6652
440 g
100 [g] for low pressure
pipe, 100 [g] for high
pressure pipe
750 g
40 g
When the cylinder contains the necessary quantity for filling
(both pipes must already be connected to the system
connectors since the vacuum operation has already been
performed), proceed as follows:
- close the LOW valve, keep the HIGH and V1 - V2 valves
open;
- press the switch B (Refrigerant process) onto position 1,
the indicator light LB1 will come on;
- press the switch C (Charge) onto position 2, the
respective indicator light LC2 will come on and refrigerant
will flow from the station into the system;
- having loaded 200
÷ 500 g of refrigerant, depending on
the size of the system, stop filling by moving the switch C
(Charge) onto position 0;
- check the system is properly sealed with the electronic
leak finder;
- complete filling the system until the pre-calculated
residual weight in the cylinder is reached;
(Residual weight = Total weight - System capacity weight)
- complete filling, move the switches C - B and A onto
position 0 (A had been moved for the vacuum).
Check again there is no leakage;
- close the HIGH valve.
50641
Figure 27
When filling, if the level of refrigerant in the cylinder
falls under the required quantity the system will stop
and the Minimum Level indicator light (L5) will
come on.
NOTE
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Base - May 2004
Operating temperature is between 0 C and 50
°C.
The instrument is equipped with a flexible probe to reach
particularly difficult fittings or parts.
The two levels of sensitivity are:
- low sensitivity = 16.5 g/year;
- high sensitivity = 3.3 g/year.
LEAK FINDER FOR AIR-CONDITIONING
SYSTEMS WITH HFC R134A (9905147)
Tool L-780A makes it possible to identify leakage of HFC
134A gas from the system extremely accurately in the order
of 3.3 g a year with the switch on maximum sensitivity.
This instrument requires no settings, the operator only needs
to select the desired sensitivity.
The instrument warns the operator of any gas leakage with a
buzzer and a LED that flashes in proportion to the
concentration of gas.
In addition, the LED indicates the battery is flat if it goes out.
OPERATIONS
PRIOR
TO
DISCONNECTING THE STATION FROM
THE SYSTEM
Always observing the above safety rules, carry out the
following operations:
- check that all the valves are closed: LOW - HIGH, V1 -
V2;
- disconnect the pipes of valves V1 - V2 and put the caps
back onto the system valves;
- Check the system again with the leak finder.
CHECKING
THE
PRESSURES
IN
THE
SYSTEM
After filling, leave the pipes connected and carry out the
following check:
- close the HIGH and LOW valves, V1 and V2 open;
- turn on the engine, switch on the air-conditioner and
check on the pressure gauges M1 and M2 that the
pressures correspond, normally: low pressure no less than
1 bar, high pressure 15
÷ 18 bar, depending on the system
specifications.
50642
50643
Figure 28
Figure 29
Normally, with the air-conditioner switched on, air
should come out of the vents at a temperature
lower than 5
°C and after a period of operation to
stabilize the temperature of the ducts.
NOTE
Before checking vehicles, wait for the engine to cool,
the hot parts can falsify the test.
NOTE
CAB AIR-CONDITIONING
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