Daikin RXQ34PY1 [42/355] Air tight test

Daikin RXQ18PY1 [42/355] Air tight test
Installation SiEN34-705
36 General Information
3.2.5 Air Tight Test
! Operational steps
Essential Points
of Testing
(Maintaining
Pressure Over a
Period)
The key to successful testing is strict adherence to the following procedure:
a) The liquid and gas piping in each refrigerant system should be pressurized in turn in
accordance with the following steps. (Nitrogen gas must be used.)
Increasing the system pressure to 4.00MPa does not guarantee the identification of minor
leaks if pressure is maintained for only a short time. It is therefore recommended that the
system remain pressurized in accordance with Step 3 above for at least 24 hours.
Note: The pressure must on no account be increased beyond 4.00MPa.
Complete
refrigerant pipe
installation work
Pressurize Check for pressure drop Success
Locate and repair leaks
(V0987)
! Step 1: increase pressure to 0.3MPa for 3
minutes or more
Indicates existence of major leaks
! Step 2: increase pressure to 1.5MPa for 3
minutes or more
Indicates existence of minor leaks
! Step 3: increase pressure to 4.00MPa for
approx. 24 hours

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