
Si39-303
Precautions for New Refrigerant (R410A)
Precautions for New Refrigerant (R410A)
225
1.3
Service Tools
R410A is used under higher working pressure, compared to previous refrigerants (R22,R407C).
Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if
oil mixing is occurred, sludge results in the refrigerants and causes other problems. Therefore,
gauge manifolds and charge hoses that are used with a previous refrigerant (R22,R407C) can
not be used for products that use new refrigerants.
Be sure to use dedicated tools and devices.
!
Tool compatibility
As for the charge mouthpiece and packing, 1/2UNF20 is necessary for mouthpiece size of
charge hose.
!
Copper tube material
* O: Soft (Annealed)
H: Hard (Drawn)
Tool
Compatibility
Reasons for change
HFC
HCFC
R410AR407C
R22
Gauge manifold
Charge hose
✕
2
Do not use the same tools for R22 and
R410A.
2
Thread specification differs for R410A
and R407C.
Charging cylinder
✕
"
2
Weighting instrument used for HFCs.
Gas detector
"
✕
2
The same tool can be used for HFCs.
Vacuum pump
(pump with reverse flow
preventive function)
"
2
To use existing pump for HFCs,
vacuum pump adaptor must be
installed.
Weighting instrument
"
Charge mouthpiece
✕
2
Seal material is different between R22
and HFCs.
2
Thread specification is different
between R410A and others.
Flaring tool (Clutch type)
"
2
For R410A, flare gauge is necessary.
Torque wrench
"
2
Torque-up for 1/2 and 5/8
Pipe cutter
"
Pipe expander
"
Pipe bender
"
Pipe assembling oil
✕
2
Due to refrigerating machine oil
change. (No Suniso oil can be used.)
Refrigerant recovery
device
Check your recovery device.
Refrigerant piping
See the chart below.
2
Only
φ
19.1 is changed to 1/2H material
while the previous material is "O".
Outside Diameter (mm)
Material
φ
6.4
"
φ
9.5
"
φ
12.7
"
φ
15.9
"
φ
19.1
1/2H
φ
22.2
1/2H
φ
25.4
1/2H
φ
28.6
1/2H
φ
31.8
1/2H
φ
34.9
1/2H
φ
38.1
1/2H
φ
41.3
1/2H
Содержание VRV II Series
Страница 6: ...Si39 303 iv Table of Contents...
Страница 31: ...Si39 303 Installation General Information 25 Flaring Procedure...
Страница 124: ...Appendix Si39 303 118 General Information 3P114237A...
Страница 130: ...Appendix Si39 303 124 General Information BHFP22M135 Refer P 120 for Table 7 8 and 9 After connection piping...
Страница 140: ...Appendix Si39 303 134 General Information 7 10 Piping System Diagrams 7 10 1 Outdoor Unit RXYQ5MY1B...
Страница 141: ...Si39 303 Appendix General Information 135 RXYQ8MY1B RXYQ10MY1B RXYQ12MY1B 4D040338A...
Страница 142: ...Appendix Si39 303 136 General Information RXYQ14MY1B RXYQ16MY1B 4D040339A...
Страница 144: ...Appendix Si39 303 138 General Information 7 11 Wiring Diagrams 7 11 1 Outdoor Unit RXYQ5MY1B...
Страница 145: ...Si39 303 Appendix General Information 139 RXYQ8MY1B RXYQ10MY1B RXYQ12MY1B 3D038582...
Страница 146: ...Appendix Si39 303 140 General Information RXYQ14MY1B RXYQ16MY1B 3D038058...
Страница 147: ...Si39 303 Appendix General Information 141 7 11 2 Field Wiring RXYQ5 16MY1B 3D040746...
Страница 148: ...Appendix Si39 303 142 General Information RXYQ18 32MY1B 3D040747...
Страница 149: ...Si39 303 Appendix General Information 143 RXYQ34 48MY1B 3D040748...
Страница 158: ...Appendix Si39 303 152 General Information...
Страница 180: ...Refrigerant Piping Si39 303 174 Installation Manual...
Страница 226: ...Troubleshooting Si39 303 220 Operation Manual...