Pipe Cutting And Flaring - Immergas AUDAX PRO 5 Instruction And Recommendation Booklet

5.2 PIPE CUTTING AND FLARING

1 Make sure you have all the equipment neces-
sary: pipe cutter, deburring tool, flaring tool,
clamp, etc.
2 If the pipe needs to be shortened, it must be
cut with a pipe cutter, being careful to keep the
cutting angle at 90° with the pipe axis. Figure
5-2 shows some examples of correctly and
incorrectly made cuts.
3 To prevent coolant leaks, cutting burrs must
absolutely be eliminated using a deburring tool.
90°
5-2
Flare
Pipe
5-4
Correct Obliquity
5-5
Lubricate with cool-
ant oil
Indoor unit cou-
pling
5-6
Attention: during deburring, the pipe must
be facing downward to prevent shavings from
getting into it (see fig. 5-3).
4 Insert the nut in the pipe, then flare it according
to the features indicated in figure 5-4
5 Make sure flaring has been done properly.
Figure 5-5 shows some examples of correctly
and incorrectly done flaring.
6 Align the pipes to make connection easier.
Tighten the flare nut by hand at first, then de-
finitively, using a dynamometric key calibrated
to the torque shown in figure 5-6.
Obliquity Roughness
Outside diameter
Damage to the
seal surface
Flare nut
Pipe to con-
nect
N.B.: tightening to an excessive torque can
cause coolant to leak.
Attention: any welding must be done in a
Nitrogen atmosphere.
Burr
5-3
Overhang
[D (mm)] [A (mm)]
Ø 6.35 1.3
Ø 9.52 1.8
Ø 12.70 2.0
Ø 15.88 2.2
Ø 19.05 2.2
Cracking
External diameter (mm)
Ø 6.35
Ø 9.52
Ø 12.70
Ø 15.88
Ø 19.05
16 16
Pipe
Pipe cutter
Collar diameter
[B (mm)]
9.0
13.0
16.2
19.3
22.5
Unevenness in the
thickness
Tightening torque (N.m)
12 ÷ 17
30 ÷ 35
40 ÷ 45
50 ÷ 60
60 ÷ 70
Burr