SiENBE34-703
Precautions for New Refrigerant (R-410A)
Precautions for New Refrigerant (R-410A)
235
1.3 Service Tools
R-410A is used under higher working pressure, compared to previous refrigerants
(R-22,R-407C). 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 (R-22,R-407C) 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 and thickness
* O: Soft (Annealed)
H: Hard (Drawn)
Tool
Compatibility
Reasons for change
HFC
HCFC
R-410A
R-407C
R-22
Gauge manifold
Charge hose
5
2
Do not use the same tools for R-22
and R-410A.
2
Thread specification differs for
R-410A and R-407C.
Charging cylinder
5
"
2
Weighting instrument used for HFCs.
Gas detector
"
5
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 adapter must be
installed.
Weighting instrument
"
Charge mouthpiece
5
2
Seal material is different between
R
-
22 and HFCs.
2
Thread specification is different
between R-410A and others.
Flaring tool (Clutch type)
"
2
For R-410A, flare gauge is necessary.
Torque wrench
"
2
Torque-up for 1/2 and 5/8
Pipe cutter
"
Pipe expander
"
Pipe bender
"
Pipe assembling oil
5
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".
R-410A
Material
O
O
O
O
1/2H
1/2H
1/2H
1/2H
1/2H
1/2H
1/2H
Thickness
t (mm)
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
1.2
1.4
1.6
Thickness
t (mm)
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
1.1
1.4
1.6
R-407C
Material
O
O
O
O
O
1/2H
1/2H
1/2H
1/2H
1/2H
1/2H
Pipe size
ø6.4
ø9.5
ø12.7
ø15.9
ø19.1
ø22.2
ø25.4
ø28.6
ø31.8
ø38.1
ø44.5
Summary of Contents for VRVIII-S
Page 1: ...SiENBE34 703 Basic Training Manual R 410A Heat Pump 50Hz Service Manual...
Page 11: ...Introduction SiENBE34 703 x...
Page 113: ...Field Setting SiENBE34 703 102 Test Operation...
Page 207: ...Troubleshooting by Indication on the Unified ON OFF Control SiENBE34 703 196 Troubleshooting...
Page 215: ...Wiring Diagrams SiENBE34 703 204 Appendix 2 3 Indoor Unit FXCQ20 25 32 63M8...
Page 216: ...SiENBE34 703 Wiring Diagrams Appendix 205 FXCQ40 50 80 125M8V3...
Page 217: ...Wiring Diagrams SiENBE34 703 206 Appendix FXFQ25 32 40 50 63 80 100 125P7VE...
Page 218: ...SiENBE34 703 Wiring Diagrams Appendix 207 FXZQ20 25 32 40 50M8V1...
Page 221: ...Wiring Diagrams SiENBE34 703 210 Appendix FXDQ20 25M8V3...
Page 222: ...SiENBE34 703 Wiring Diagrams Appendix 211 FXSQ20 25 32 40 50 63 80 100 125M8V3...
Page 232: ...SiENBE34 703 Option List Appendix 221...
Page 235: ...Example of Connection SiENBE34 703 224 Appendix...
Page 241: ...Method of Replacing the Inverter s Power Transistors Modules SiBE34 703 230 Appendix...
Page 261: ...RXYSQ4 5 6 P7Y1B SiENBE34 703 250 Removal Procedure...