Iveco Daily Euro 4. Manual — part 223
SAFETY STANDARDS
- never expose the unit or operate it in acidic or wet
environments or close to open containers of inflammable
substances;
- the unit must operate in places with good ventilation;
- never alter the settings of the safety valves and control
systems;
- never use bottles or other storage containers that are not
approved and are not fitted with safety valves;
- never load any container over 80% of its maximum
capacity;
- never leave the unit powered if it is not to be used
immediately. Cut off the mains power supply when it is
not planned to use the equipment.
- always wear gloves and goggles when working with
refrigerant gases. Contact of refrigerant liquid with the
eyes can cause blindness;
- avoid all contact with skin (low boiling point -30
°C can
cause frostbite);
- never inhale the vapours of refrigerant gases;
- before connecting the station with a system or external
container, check that all the valves are closed;
- before disconnecting the station, check that the cycle is
over and all the valves are closed. This will prevent
dispersing refrigerant gas into the atmosphere;
The station is equipped with special fittings to avoid
contamination with systems using R12. Do not attempt to
adapt this unit for use with R12.
This station is exclusively for professionally trained
operators who must be familiar with refrigerating
systems,
refrigerant
gases
and
the
damage
pressurized equipment can cause, therefore:
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Fully load
the system
Drain off oil
from the system
Is there any
leakage?
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
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?
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OPERATION FLOW CHART
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.
52295
Figure 16
DEMONSTRATIVE FIGURE
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- 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;
- put the switches A, B and C back onto position 0;
- close the V1, V2, LOW and HIGH valves.
- Continue the operations following the instructions given
on the following pages.
50636
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.
NOTE
Figure 17
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