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Connecting Pipes to the Indoor Unit
• Preparation of Piping
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
1) Cut the pipes and the cable.
• 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 1.5m 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.
Outside diameter
mm
inch
Ø6.35
1/4
Ø9.52
3/8
Ø12.7
1/2
Ø15.88
5/8
Ø19.05
3/4
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
5) Check
n Compare the flared work with figure below.
n If flare is noted to be defective, cut off the flared
section and do flaring work again.
• If the piping and the drain hose are in common
direction bundle the piping and the drain hose
together by wrapping them with vinyl tape.
Copper
tube
Bar
Copper pipe
A
mm
Smooth all round
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
1.9~2.1
Even length
all round
Connection pipe
Vinyl tape (wide)
Slanted Uneven Rough
90°
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
"A"
Clamp handle
Red arrow mark
Inside is shining without scratches
= Improper flaring =
Inclined
Surface
Cracked Uneven
damaged
Wrap with vinyl tape
Connecting cable
Vinyl tape(narrow)
Installation Manual 17
Installation
Handle
Yoke
Cone
thickness
Indoor unit pipe
Pipe
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