Concealed Duct Installation Manual

INSTALLATION
ENGLISH
15
Copper
tube
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Flaring work
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
1 Cut the pipes
- Use the accessory piping kit or the pipes
purchased locally.
- Measure the distance between the
indoor and the outdoor unit.
- Cut the pipes a little longer than
measured distance.
- Cut the cable 1.5 m(4.9 ft) longer than
the pipe length.
2 Burrs removal
- Completely remove all burrs from the cut
cross section of pipe/tube.
- Put the end of the copper tube/pipe to
downward direction as you remove burrs
in order to avoid to let burrs drop in the
tubing.
3 Putting nut on
- Remove flare nuts attached to indoor and
outdoor units, than put them on
pipe/tube having completed burr removal.
(Not possible to put them on after flaring
work)
4 Flaring work
- Carry out flaring work using flaring tool as
shown below.
5 Check
- Compare the flared work with figure.
- If flare is noted to be defective, cut off
the flared section and do flaring work
again.
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
Bar
Copper pipe
"A"
<Wing nut type>
<Clutch type>
Pipe diameter
Inch (mm)
A Inch (mm)
Thickness
Inch (mm)
Wing nut type Clutch type
Ø 1/4 (Ø 6.35) 0.04~0.05 (1.1~1.3)
0~0.02
(0~0.5)
0.03 (0.7)
Ø 3/8 (Ø 9.52) 0.06~0.07 (1.5~1.7) 0.03 (0.8)
Ø 1/2 (Ø 12.7) 0.06~0.07 (1.6~1.8) 0.03 (0.8)
Ø 5/8 (Ø 15.88) 0.06~0.07 (1.6~1.8) 0.04 (1.0)
Ø 3/4 (Ø 19.05) 0.07~0.08 (1.9~2.1) 0.04 (1.0)