Daikin ALTHERMA HT Service Manual page 286

Precautions for New Refrigerant (R-410A)
 Temperature scale indicates the relationship between pressure and temperature in gas
 Differences
 Change in pressure
 Change in service port diameter
7. Charge hose for R-410A
 Specifications
 Working pressure 5.08 MPa (51.8 kg/cm
 Rupture pressure 25.4 MPa (259 kg/cm
 Available with and without hand-operate valve that prevents refrigerant from outflow.
 Differences
 Pressure proof hose
 Change in service port diameter
 Use of nylon coated material for HFC resistance
8. Charging cylinder
 Specifications
 Use weigher for refrigerant charge listed below to charge directly from refrigerant cylinder.
 Differences
 The cylinder can not be used for mixed refrigerant since mixing ratio is changed during
274
saturated state.
charging.
When R-410A is charged in liquid state using charging cylinder, foaming phenomenon is
generated inside charging cylinder.
(Hose with ball valve)
2
)
2
)
Can not be used
Precautions for New Refrigerant (R-410A)
ESIE09-08B