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7.4.1
•
(the larger one)
• Connect the service valve to a manometric unit plus oxigen free nitrogen (OFN) bottle.
•
• Use liquid soap to check that the joints are tight and without leaks.
•
sure that the unions have been tightened and that the flares are the right shape.
• Wipe off the liquid soap with a rag.
•
• Having reduced the pressure, disconnect the nitrogen bottle.
CAUTION
The airtight testing should never use any oxygen, flammable gas or poisonous gas.
7.4.2 Air purge with vacuum pump
subsequent blockage of the same, corrosion in the circuit.
•
• Turn on the relative knob on the monometric unit to allow the pump to access the cooling circuit.
•
• As soon as the required vacuum value is reached, shut the connection cock and stop the vacuum pump.
Note
OU =
Outdoor unit
IU =
Indoor unit
EN
94
2
) using the oxigen free nitrogen (OFN) in the bottle.
OU
G
L
fig. 14 - Airtight test and leakage detection
OU
G
L
fig. 15 - Air purge with vacuum pump
Cod. 354M000010 - Rev. 03 - 06/2023
OMNIA SW-T 3.2
IU
G
L
IU
L
G
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