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Installation
Si39-303
24
General Information
Flare Connection
(a) Stiffened pipe must always be annealed at least once prior to the flaring work.
(b) A pipe cutter must be used to cut the pipe. (A large pipe cutter must be used where the pipe has a large
diameter. When cutting a pipe which is too big for the pipe cutter a metal saw may be used but care
must be taken to ensure that the debris from sawing does not get into the pipe.)
(c) Set the flaring tool to make sure the flare size remains within the prescribed limits.
New Rank Compatible Flare Tool
Compared to previous refrigerants, the components of a HFC refrigerant is small. R410A also has a higher
pressure than other refrigerants. Therefore, in order to strengthen the intensity of the form and size of the
flare section used for R410A (class 2) apparatus, unlike the specification of the conventional refrigerants, it
was set up with different standards.
When carrying out flare processing, use a new rank compatible flare tool or a conventional flare tool.
Flare Gauge (Adapter Corresponding to the New Rank)
When using the later, use a flare gauge to take out the pipe from the gauge bar, adjust it, and then carry out
the flare processing.
Size from the dice surface to the copper tip (in mm)
(d) Coat the inner and outer surface of the flare with refrigerator oil (Ester or ether oil). (this ensures that the
flare nut passes smoothly, preventing the pipe from twisting.)
Do not use SUNISO-4GS oil.
Important points
1. Burrs should be carefully removed.
2. 2 spanners should be used to grip the flare nuts.
3. The flare nut must be inserted before starting the flaring operation.
4. The appropriate amount of torque should be used to tighten the flare nut.
5. Check that there is no superficial damage to the surface of the flare.
Nominal diameter
External diameter of pipe d
Pipe widening dimensions A
1/4
6.35
9.1
3/8
9.52
13.2
1/2
12.7
16.6
5/8
15.88
19.7
3/4
19.05
24.0
Name
Outer
diameter
Wall
thickness
Previous refrigerant (R22, R407C etc.)
R410A
The conventional flare tool
The conventional flare tool
Clutch type
Clutch type
1/4
6.35
0.8
0~0.5
1.0~1.5
3/8
9.52
0.8
0~0.5
1.0~1.5
1/2
12.70
0.8
0~0.5
1.0~1.5
5/8
15.88
1.0
0~0.5
1.0~1.5
Standard torques for tightening flare nut
±
10%
Size
Torque
(kgf-cm)
(N-cm)
1/4(6.4
φ
)
144~176
1420~1720
3/8(9.5
φ
)
333~407
3270~3990
1/2(12.7
φ
)
504~616
4950~6030
5/8(15.9
φ
)
630~770
6180~7540
3/4(19.1
φ
)
990~1210
9270~11860
12mm×72mm
1.0×0.5mm Each
Flare gauge
Size
Thickness
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...