Daikin ALTHERMA HT Service Manual page 284

Precautions for New Refrigerant (R-410A)
2. Torque wrench
 Specifications
 Dimension B
 Differences
 Change of dimension B
3. Vacuum pump with check valve
 Specifications
 Discharge speed
 Suction port UNF7/16-20(1/4 Flare)
 Differences
 Equipped with function to prevent reverse oil flow
 Previous vacuum pump can be used by installing adapter.
272
Nominal size Class-1
1/2 24
5/8 27
No change in tightening torque
No change in pipes of other sizes
Only 1/2", 5/8" are extended
50 l/min (50Hz)
60 l/min (60Hz)
UNF1/2-20(5/16 Flare) with adapter
Class-2
26
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
–100.7 kPa (5 torr – 755 mmHg).
Precautions for New Refrigerant (R-410A)
ESIE09-08B
Unit:mm
Previous
24
27