Daikin VRV - WII, Service Manual

Page: 303 / 312

Precautions for New Refrigerant (R-410A) SiUS30-604
290 Precautions for New Refrigerant (R-410A)
2
1/4"
→
5/16" (2min
→
2.5min)
2
No oil is used in pressure test of gauges.
→
For prevention of contamination
2
Temperature scale indicates the relationship between pressure and temperature in gas
saturated state.
„
Differences
2
Change in pressure
2
Change in service port diameter
7. Charge hose for R-410A
„
Specifications
2
Working pressure 737 psi (51.8 kg/cm
2
)
2
Rupture pressure 3685 psi (259 kg/cm
2
)
2
Available with and without hand-operate valve that prevents refrigerant from outflow.
„
Differences
2
Pressure proof hose
2
Change in service port diameter
2
Use of nylon coated material for HFC resistance
8. Weigher for refrigerant charge
„
Specifications
2
High accuracy
TA101A (for 10-kg cylinder) = ± 2g
TA101B (for 20-kg cylinder) = ± 5g
2
Equipped with pressure-resistant sight glass to check liquid refrigerant charging.
2
A manifold with separate ports for HFCs and previous refrigerants is equipped as standard
accessories.
„
Differences
2
Measurement is based on weight to prevent change of mixing ratio during charging.
(Hose with ball valve)