Iveco Daily Euro 4. Manual — part 224
CREATING A VACUUM IN THE SYSTEM
This operation should be carried out if all the repairs have
been performed and the system components have been
properly refitted. This operation is the phase prior to refilling,
therefore proceed as follows:
After a few minutes of operation (10 at most) if the system
has no leaks the indicator light LD2 VACUUM TEST will
also come on. From this time on, evacuation should be
continued for at least two hours to obtain a good
evacuation.
- At the end of the time programmed for evacuation, press
the switch D (vacuum test) onto position 2 and leave the
system in this state for 3-5 minutes.
The indicator light LD2 VACUUM TEST is on if the
system has a good seal. The indicator light LD2 VACUUM
TEST goes out if there is a leak. Eliminate the leak and
repeat the evacuation cycle.
- Put the switches D and B back onto position 0 and
proceed with the following phase.
- Connect the pipes to the specific system connections and
open the V1-V2/LOW and HIGH valves.
- Press the switch A (Process Unit) onto position 1.
The respective indicator light LA1 will come on.
- Press the switch B (Vacuum Process) onto position 2.
The respective indicator light LB2 will come on.
- Press the switch D (Vacuum) onto position 1. The system
will automatically start being evacuated and the respective
indicator light LD1 will come on to signal the operation
in progress.
50637
Do not run the vacuum cycle when there is even
minimal pressure in the station or system.
NOTE
The indicator light LD2 vacuum test fails to come on
if there is a leak. Stop evacuation, eliminate the leak
and repeat the evacuation procedure.
Figure 18
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It is possible that at the end of each recovery cycle the station
may have recovered lubrication oil from the compressor,
which should be drained off into a specific graduated container
(1).
1 Slowly open the valve V5 (Oil Discharge).
2 When all the oil has been discharged into the container (1)
close the valve V5.
3 Quantify and record the amount of oil discharged.
4 Eliminate the recovered oil correctly.
This oil cannot be reused.
The same amount of new oil as has been removed must
be added to the system.
1
50638
Figure 19
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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
Keep the oil containers well sealed in order to avoid
contamination. In particular, remember that oil is
extremely hygroscopic:.
NOTE
Figure 20
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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.
NOTE
Figure 21
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VEHICLE
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
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