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6
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Installation
Installer reference guide
32
FTXP50~7 FTXF20~7 ATXF50~71A2V1B
Daikin room air conditioner
4P513661-8H – 2019.12
▪
ALWAYS use 2 wrenches together when loosening a flare nut.
▪
ALWAYS use a spanner and torque wrench together to tighten the flare nut when
connecting the piping. This to prevent nut cracking and leaks.
a
b
c
d
a
Torque wrench
b
Spanner
c
Piping union
d
Flare nut
Piping size (mm)
Tightening torque
(N•m)
Flare dimensions
(A) (mm)
Flare shape (mm)
Ø6.4
15~17
8.7~9.1
R=
0.4~0.8
±2
45°
90°
±2
ØA
Ø9.5
33~39
12.8~13.2
Ø12.7
50~60
16.2~16.6
6.4.4 Pipe bending guidelines
Use a pipe bender for bending. All pipe bends should be as gentle as possible
(bending radius should be 30~40 mm or larger).
6.4.5 To flare the pipe end
CAUTION
▪
Incomplete flaring may cause refrigerant gas leakage.
▪
Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage.
▪
Use flare nuts that are included with the unit. Using different flare nuts may
cause refrigerant gas leakage.
1
Cut the pipe end with a pipe cutter.
2
Remove burrs with the cut surface facing down so that the chips do NOT enter
the pipe.
a
b
a
Cut exactly at right angles.
b
Remove burrs.
3
Remove the flare nut from the stop valve and put the flare nut on the pipe.
4
Flare the pipe. Set exactly at the position as shown in the following figure.
A
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