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Precautions for New Refrigerant (R-410A)
SiUS39-602
248
Precautions for New Refrigerant (R-410A)
1.2
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
✕
2
Do not use the same tools for R-22
and R-410A.
2
Thread specification differs for
R-410A and R-407C.
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
{
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
✕
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".
Pipe size
φ
6.4
φ
9.5
φ
12.7
φ
15.9
φ
19.1
φ
22.2
φ
25.4
φ
28.6
φ
31.8
φ
38.1
φ
44.5
Material
O
O
O
O
O
1/2H
1/2H
1/2H
1/2H
1/2H
1/2H
Material
O
O
O
O
1/2H
1/2H
1/2H
1/2H
1/2H
1/2H
1/2H
Thickness
[mm]
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
1.2
1.4
1.6
Thickness
[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
R-410A
Summary of Contents for REYQ72
Page 35: ...Specifications SiUS39 602 24 Specifications...
Page 121: ...Field Setting SiUS39 602 110 Test Operation...
Page 129: ...Troubleshooting by Remote Controller SiUS39 602 118 Troubleshooting...
Page 225: ...Troubleshooting OP Unified ON OFF Controller SiUS39 602 214 Troubleshooting...
Page 232: ...SiUS39 602 Piping Diagrams Appendix 221 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338...
Page 235: ...Wiring Diagrams for Reference SiUS39 602 224 Appendix REYQ144 168 192MTJU C 3D050354A...
Page 240: ...SiUS39 602 Wiring Diagrams for Reference Appendix 229 2 4 BS Unit BSVQ36M 60MVJU 3D045069A...
Page 249: ...Example of Connection R 410A Type SiUS39 602 238 Appendix...
Page 255: ...Method of Replacing The Inverter s Power Transistors and Diode Modules SiUS39 602 244 Appendix...
Page 265: ...Precautions for New Refrigerant R 410A SiUS39 602 254 Precautions for New Refrigerant R 410A...
Page 269: ...SiUS39 602 iv Index...