NOTE
•The pipe will be insulated and fixed permanently into position after finishing the installation and the gas leak test. For further details. see Step 4.1 Performing the gas leak tests on page 46.
CAUTION
•Tighten the flare nut with a torque wrench according to specified method. If the flare nut is
•Do not box in or cover the pipe connection. All refrigerant pipe connection must be easily accessible and serviceable.
Step 2.7 Shortening or extending the refrigerant pipes (assembly pipe)
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90° | Oblique | Rough | Burr |
D |
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| A | 45°±2° |
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Outer diameter (D) | Depth (A) Flare dimension (L) | ||
ø 6.35 | 1.3 | 8.7 to | 9.1 |
ø 9.52 | 1.8 | 12.8 to | 13.2 |
ø 12.70 | 2.0 | 16.2 to | 16.6 |
ø 15.88 | 2.2 | 19.3 to | 19.7 |
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| Flare nut |
Indoor outlet pipe | Connecting pipe | |
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Outer diameter (mm) | Torque (N•m) | Torque (kgf•cm) |
ø 6.35 | 14 to 18 | 140 to 180 |
ø 9.52 | 34 to 42 | 350 to 430 |
ø 12.70 | 49 to 61 | 500 to 620 |
ø 15.88 | 68 to 82 | 690 to 830 |
CAUTION
•If you need a pipe longer than specified in piping codes and standards, you must add refrigerant to the pipe. Otherwise, the indoor unit may freeze.
•While removing burrs, put the pipe face down to make sure that the burrs do not get in to the pipe.
Liquid service port | Gas service port | ||||||
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Inclined | Cracked | Uneven | Damaged |
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<Flare nut>
Installation
English 41
