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2. Flaring
To cut the piping with a pipe cutter, rotate
the pipe cutter repeatedly.
Put the pipe into the connecting nut flaring,
and both the gas pipe and liquid pipe of the
IDU are connected by flaring.
90°±4
A
R0.4–0.8
3. Nut fastening
Align the connecting piping, firstly tighten most of the thread of the connecting nut by hand, and then use a
1
wrench to tighten the last 1-2 turns of the thread as shown in the figure.
The welding is done on site, and the bell mouth cannot be used indoors.(For IEC/EN 60335-2-40 except IEC
2
60335-2-40: 2018)
The protective nut is a one-time part, it can not be reused. In case it is removed, it should be replaced with a
3
new one.(For IEC 60335-2-40: 2018 only)
Bar
Copper pipe
Indoor unit tubing
[ Caution ]
Excessive torque can break nut on installation conditions.
When flared joints are reused indoors,the flare part should be re-fabricated.
Bar
Clamp handle
Red arrow mark
Flare nut
Pipe cutter
Outer diameter
(mm)
Φ6.35
Φ9.52
Φ12.7
Φ15.9
Φ19.1
Handle
Yoke
Cone
Pipings
29
Installation
Rough
Slope
90°
A (mm)
Max.
Min.
8.7
12.4
12.0
15.8
15.4
19.1
18.6
23.3
22.9
Protective nut
Burrs
8.3
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