Daikin VRV II Series, Design, Installation & Testing Instructions, Page: 233 / 242

Si39-303 Precautions for New Refrigerant (R410A)
Precautions for New Refrigerant (R410A) 227
2. Torque wrench
!
Specifications
2
Dimension B Unit:mm
No change in tightening torque
No change in pipes of other sizes
!
Differences
2
Change of dimension B
Only 1/2", 5/8" are extended
3. Vacuum pump with check valve
!
Specifications
2
Discharge speed
)
Maximum degree of vacuum
50 l/min (50Hz) –100.7 kpa (5 torr – 755 mmHg)
60 l/min (60Hz)
2
Suction port UNF7/16-20(1/4 Flare)
UNF1/2-20(5/16 Flare) with adapter
!
Differences
2
Equipped with function to prevent reverse oil flow
2
Previous vacuum pump can be used by installing adapter.
Nominal size Class-1 Class-2 Previous
1/2 24 26 24
5/8 27 29 27
Dimension B
For class-1: R407C
For class-2: R410A
Vacuum pump adapter
Reverse flow preventive
vacuum adapter