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Daikin VRV III-S RXYMQ36 48PVJU Service Manual: Precautions For New Refrigerant (r-410a); Outline

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SiUS34-907

1. Precautions for New Refrigerant (R-410A)

1.1
Outline
1.1.1 About Refrigerant R-410A
 Characteristics of new refrigerant, R-410A
1. Performance
Almost the same performance as R-22 and R-407C
2. Pressure
Working pressure is approx. 1.4 times more than R-22 and R-407C.
3. Refrigerant composition
Few problems in composition control, since it is a Quasi-azeotropic mixture refrigerant.
Refrigerant name
Composing
substances
Design pressure
Refrigerant oil
Ozone destruction
factor (ODP)
Combustibility
Toxicity
1. Non-azeotropic mixture refrigerant: mixture of two or more refrigerants having different boiling points.
2. Quasi-azeotropic mixture refrigerant: mixture of two or more refrigerants having similar boiling points.
3. The design pressure is different at each product. Please refer to the installation manual for each product.
(Reference) 1 MPa
Precautions for New Refrigerant (R-410A)
HFC units (Units using new refrigerants)
R-407C
Non-azeotropic mixture of
HFC32, HFC125 and
HFC134a (*1)
3.2 MPa (gauge pressure)
2
= 32.6 kgf/cm
=464 psi
0
None
None
10.19716 kgf / cm
1 MPa
145 psi
Pressure-Enthalpy curves of HFC-32/125 (50/50wt%)
R-410A
Quasi-azeotropic mixture of
HFC32 and JFC125 (*1)
4.0 MPa (gauge pressure)
2
= 40.8 kgf/cm
=580 psi
Synthetic oil (Ether)
0
None
None
2
Precautions for New Refrigerant (R-410A)
HCFC units
Single-component refrigerant
2.75MPa (gauge pressure)
= 28.0 kgf/cm
Mineral oil (Suniso)
R-22
2
=399 psi
0.05
None
None
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