Sunlight Supply Samsung Linesets for Mini Split Systems - Manual (Page 32)

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Cutting or extending the pipe
Outer Diameter Torque
ø1/4inch(6.35mm) 10.1~12.3 ft.lb (140~170 kgf.cm)
ø3/8inch(9.52mm) 18.1~20.3 ft.lb (250~280 kgf.cm)
ø1/2inch(12.70mm) 27.5~30.4 ft.lb (380~420 kgf.cm)
ø5/8inch(15.88mm) 31.8~34.7 ft.lb (440~480 kgf.cm)
ø3/4inch(19.05mm) 71.6~87.5 ft.lb (990~1210 kgf.cm)
ø7/8 inch(22.23mm) 71.6~87.5 ft.lb (990~1210 kgf.cm)
Indoor outlet pipe Connecting pipe
Flare nut
5. Check if you flared the pipe correctly (see examples of incorrectly flared pipes below).
6. Align the pipes to connect them easily. Tighten the flare nuts first with your hands, and then with a torque wrench,
applying the following torque:
7. For further details on how to connect to the outdoor unit and purge the air, refer to page 35~37.
Correct Uneven
Thickness
Cracked Damaged
Surface
Inclined
• Excessive torque can be cause of gas leakage. In case brazing the pipe, the nitrogen gas must be blown into the
pipe (50 Pa). The joint must be accessible and serviceable.
• Tighten the flare nut with torque wrench according to specified method.
If the flare nut is over-tightened, the flare may break and cause refrigerant gas leakage.
1. Make sure that you have all the required tools (pipe cutter, reamer, flaring tool and pipe holder).
2. If you want to shorten the pipe, cut it using a pipe cutter, ensuring that the cut edge remains at 90° with the side of the
pipe (see below examples of correct and incorrect cut edges).
3. To prevent a gas leak, remove all burrs at the cut edge of the pipe using a reamer.
4. Put a flare nut slightly into the pipe and modify the flare.
Oblique Rough Burr Pipe
cutter
Pipe
Outer Diameter (D) Depth (A) Flaring Size (B)
ø1/4inch(6.35mm) 0.051inch(1.3mm) 0.354inch(9.0mm)
ø3/8inch(9.52mm) 0.071inch(1.8mm) 0.512inch(13.0mm)
ø1/2inch(12.70mm) 0.079inch(2.0mm) 0.638inch(16.2mm)
ø5/8inch(15.88mm) 0.087inch(2.2mm) 0.760inch(19.3mm)
ø3/4inch(19.05mm) 0.087inch(2.2mm) 0.886inch(22.5mm)
ø7/8 inch(22.23mm) 0.087inch(2.2mm) 1.012inch(25.7mm) Pipe Flare
• Face the pipe down while removing the burrs to make sure that burrs do not get in to the pipe.
Vivaldi MAX_AQN09VFU@@ IB&IM_32163A_E.indd 32 2012-6-20 13:29:00