SiUS28-902 Precautions for New Refrigerant (R-410A)
Precautions for New Refrigerant (R-410A) 174
2. Torque wrench
Specifications
• Dimension B Unit:mm
No change in tightening torque
No change in pipes of other sizes
Differences
• Change of dimension B
Only 1/2", 5/8" are extended
3. Vacuum pump with check valve
Specifications
• Discharge speed Maximum degree of vacuum
50 l/min (50Hz) Select a vacuum pump which is able to keep
60 l/min (60Hz) the vacuum degree of the system in excess of
• Suction port UNF7/16-20(1/4 Flare) –14.6 psi (5 torr or 5000 micron or – 755 mmHg).
UNF1/2-20(5/16 Flare) with adapter
Differences
• Equipped with function to prevent reverse oil flow
• 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
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