4 REFRIGERANT PIPING
Pipe Forming/End Positioning
•Forming of pipe
Form the pipe along with a marked line of the cabinet.
•End positioning of pipe
Match the ends of both pipes at a distance of 85 mm apart from the marked line.
Marked line
• Flaring size : A (Unit : mm)
| A | +0 | |
Outer diam. of copper pipe | - 0.4 | ||
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R410A | R22 | ||
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6.35 | 9.1 | 9.0 | |
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9.52 | 13.2 | 13.0 | |
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12.7 | 16.6 | 16.2 | |
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15.9 | 19.7 | 19.4 | |
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*In case of flaring for R410A with the conventional flare tool, pull it out approx. 0.5 mm more than that of R22 to adjust to the specified flare size. The copper pipe gauge is useful for adjusting projection margin
size.
A
• Projection margin in flaring : B (Unit : mm)
Flaring |
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| Rigid (Clutch type) |
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1. Cut the pipe with a pipe cutter. |
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Outer diam. | R410A tool used | Conventional tool used | |||||
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| of copper |
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| R410A | R22 | R410A | R22 | |
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| pipe | ||||
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| 6.35 | 0 to 0.5 | (Same as left) | 1.0 to 1.5 | 0.5 to 1.0 |
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| 9.52 | 0 to 0.5 | (Same as left) | 1.0 to 1.5 | 0.5 to 1.0 |
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| 90˚ | Obliquity Roughness Warp | 12.7 | 0 to 0.5 | (Same as left) | 1.0 to 1.5 | 0.5 to 1.0 |
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| 15.9 | 0 to 0.5 | (Same as left) | 1.0 to 1.5 | 0.5 to 1.0 |
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2.Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of refrigerant R22, the flare tools newly manufactured for R410A are recommended.
However, the conventional tools can be used by adjusting projection margin of the copper pipe.
B |
Imperial (Wing nut type)
Outer diam. of | R410A | R22 | |
copper pipe | |||
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6.35 | 1.5 to 2.0 | 1.0 to 1.5 | |
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9.52 | 1.5 to 2.0 | 1.0 to 1.5 | |
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12.7 | 2.0 to 2.5 | 1.5 to 2.0 | |
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15.9 | 2.0 to 2.5 | 1.5 to 2.0 | |
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