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Drain Piping
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 1.5 m longer than the pipe
length.
Copper tube
a
b
Slanted
c
Uneven
d
Rough
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.
Point down
a
Pipe
b
Reamer
c
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)
a
Copper tube
Flare nut
b
4
Flare work
• Carry out flaring work using flaring tool as
shown below.
Bar
a
b
Copper pipe
c
Clamp handle
d
Red arrow mark
Cone
e
Yoke
f
Handle
g
INSTALLATION
19
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