14
Installation Procedure
Installation Procedure
English
Step 6 Cutting and flaring the pipes
1 Make sure that you have the required tools available:
pipe cutter, reamer, flaring tool, and pipe holder.
2 If you wish to shorten the pipes, cut them with a pipe
cutter, ensuring that the cut edge remains at a 90°
angle to the side of the pipe. Refer to the illustrations
below for examples of edges cut correctly and
incorrectly.
3 To prevent any gas from leaking out, remove all burrs
at the cut edge of the pipe, using a reamer.
4 Slide a flare nut on to the pipe and modify the flare.
Pipe
Flare
D
A
Flare
90° ±2°
R 0.4 to 0.8 mm
D
L
45° ±2°
Outer Diameter (D) Depth (A) Flare dimension (L)
Ø6.35 mm 1.3 mm 8.7 to 9.1 mm
Ø9.52 mm 1.8 mm 12.8 to 13.2 mm
Ø12.70 mm 2.0 mm 16.2 to 16.6 mm
Ø15.88 mm 2.2 mm 19.3 to 19.7 mm
Ø19.05 mm 2.2 mm 23.6 to 24.0 mm
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
Correct
Inclined
Damaged
Surface
Cracked
Uneven
Thickness
Step 7 Connecting the assembly
pipes to the refrigerant pipes
There are two refrigerant pipes of different diameters :
ŷ A smaller one for the liquid refrigerant.
ŷ A larger one for the gas refrigerant. The inside of
copper pipe must be clean and has no dust.
1 Remove the pinch pipe on the pipes and connect the
assembly pipes to each pipe, tightening the nuts, first
manually and then with a torque wrench, a spanner
applying the following torque.
Torque
wrench
Flare nut
Spanner
Union
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