SiUS28-902 Precautions for New Refrigerant (R-410A)
Precautions for New Refrigerant (R-410A) 176
6. Gauge manifold for R-410A
Specifications
• High pressure gauge
15 to 770 psi (-76 cmHg to 53 kg/cm
2
)
• Low pressure gauge
15 to 550 psi (-76 cmHg to 38 kg/cm
2
)
•1/4" → 5/16" (2min → 2.5min)
• No oil is used in pressure test of gauges.
→ For prevention of contamination
• Temperature scale indicates the relationship between pressure and temperature in gas
saturated state.
Differences
• Change in pressure
• Change in service port diameter
7. Charge hose for R-410A
Specifications
• Working pressure 737 psi (51.8 kg/cm
2
)
• Rupture pressure 3685 psi (259 kg/cm
2
)
• Available with and without hand-operated valve that prevents refrigerant from outflow.
Differences
• Pressure proof hose
• Change in service port diameter
• Use of nylon coated material for HFC resistance
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