Iveco Stralis AT/AD. Manual — part 271
Drain off oil
from the system
Preparing the station
First recovery
Wait 3-5 minutes
Second recovery
Operate on the system
Vacuum for 5-10 minutes
with first vacuum test
Vacuum for 30 minutes
with second vacuum test
Load oil
into the system
Load up to 200 g
refrigerant
Search for leakage with
electronic leak finder
Fully load
the system
Search system for leakage with
electronic leak finder
Pressure check
Are the values
acceptable?
Disconnect the station
from the system
NO
NO
YES
YES
NO
NO
YES
YES
YES
NO
Is there any
leakage?
Is there any
leakage?
Is there any
leakage?
Is there any
leakage?
18
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TRALIS
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Base - January 2003
RECOVERING REFRIGERANT
FROM THE VEHICLE SYSTEM
Before
starting
to
disconnect
the
pipes
from
the
air-conditioner, check whether it is possible to do the repairs
without discharging the gas.
If this is not possible, the following operations must be carried
out:
- connect the pipe marked HIGH under the pressure gauge
to the evaporator inlet (the inlet is the one on the
pipe with a smaller diameter (H) connecting the drier
filter with the evaporator);
- connect the pipe marked LOW under the pressure gauge
to the evaporator outlet (the outlet is the one on the pipe
with a larger diameter (L) connecting the evaporator with
the drier);
- open the valves V1 and V2;
- open the LOW and HIGH cocks;
Figure 20
77049
BODYWORK AND CHASSIS FRAME
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If the refrigerant reaches the maximum level
(maximum level indicator light L4 on), the recovery
cycle must be stopped immediately by pressing
switch C onto position 0 and transferring the
refrigerant from the filler cylinder to a suitable
external bottle.
!
- put the switches A, B and C back onto position 0;
- close the V1, V2, LOW and HIGH valves.
- connect the station to the electricity mains (220 V - 50 Hz);
- press the switch A (Process Unit) onto position 1.
The respective indicator light LA1 will come on;
- press the switch B (Refrigerant Process) onto position 1;
- the respective indicator light LB1 will come on;
- press the switch C (Recovery Recycle) onto position 1.
The
recovery
and
recycling
operation
will
start
automatically. The respective indicator light LC1 will come
on to signal the operation in progress.
On completing this operation the unit will automatically
stop and the indicator light LC1 go out. Wait for a few
minutes so that any pockets of refrigerant at low pressure
remaining in the system can increase their pressure, by
absorbing heat, and be able to be recovered. The station
will automatically repeat the recovery cycle if the above
conditions occur;
- Continue the operations following the instructions given
on the following pages.
Figure 21
50636
20
BODYWORK AND CHASSIS FRAME
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TRALIS
AT/AD
Base - January 2003
- 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.
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.
Figure 22
50637
Do not run the vacuum cycle when there is even
minimal pressure in the station or system.
!
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.
!
BODYWORK AND CHASSIS FRAME
21
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TRALIS
AT/AD
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