Daikin VRV - WII Service Manual page 301

Precautions for New Refrigerant (R-410A)
2. Torque wrench
2 Dimension B
2 Change of dimension B
3. Vacuum pump with check valve
2 Discharge speed
2 Suction port UNF7/16-20 (1/4 Flare)
2 Equipped with function to prevent reverse oil flow
2 Previous vacuum pump can be used by installing adapter.
288
Specifications
Nominal size Class-1
1/2
5/8
No change in tightening torque
No change in pipes of other sizes
Differences
Only 1/2", 5/8" are extended
Specifications
50 l/min (50Hz)
60 l/min (60Hz)
UNF1/2-20 (5/16 Flare) with adapter
Differences
Class-2
24 26
27 29
For class-1: R-407C
For class-2: R-410A
Dimension B
Vacuum pump adapter
Reverse flow preventive
vacuum adapter
Maximum degree of vacuum
Select a vacuum pump which is able to keep
the vacuum degree of the system in excess of
–14.6 psi (5 torr or 5000 micron or – 755 mmHg).
Unit:mm
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Precautions for New Refrigerant (R-410A)
SiUS30-604