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Fig.43
C
Fig.44
25 bar
Fig.45
Isolation valves
C
Fig.46
Pressure
7740321 - v04 - 03122019
6.4.4
A leak-tightness test is necessary as the refrigerant fluid can have harmful
effects on health and the environment.
B
A
MW-4000143-1
MW-4000144-2
6.4.5
B
A
MW-4000145-1
MW-4000146-1
Carrying out a leak-tightness test
1. Check that isolation valves A and B are closed.
2. Connect the pressure gauge valve and the nitrogen cylinder to service
connection C on isolation valve A.
3. Progressively pressurise the refrigerant connection pipes in steps of 5
bar until you reach 25 bar.
4. Check the tightness of the connections.
If leaks occur, redo the leaking connection and recheck tightness.
5. Release the pressure and release the nitrogen.
Evacuation of the refrigeration system
1. Check that isolation valves A and B are closed.
2. Connect the vacuum gauge and the vacuum pump to the service
connection C on isolation valve A.
3. Create a vacuum in the refrigerant connection pipes.
4. Check the pressure according to the recommendations table below:
Outside temperature
Pressure to be reached
Evacuation time after reach
ing the pressure
5. Close the valve between the vacuum gauge / vacuum pump and
isolation valve A.
6. After shutting off the vacuum pump, immediately open the valves.
°C
≥ 20
10
0
600
250
Pa
1000
(0.00
(0.00
(bar)
(0.01)
6)
25)
h
1
1
2
SPC Split
6 Installation
- 10
200
(0.00
2)
3
49
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