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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) Flaring work
• Carry out flaring work using flaring tool as shown below.
Pipe
Indoor unit
[kW(Btu/h]
Gas
Liquid
<5.6(19,100)
1/2"
<16.0(54,600)
5/8"
<22.4(76,400)
3/4"
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
4) Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the flared section
and do flaring work again.
" A "
Gas
Liquid
1/4"
0.5~0.8
0~0.5
3/8"
0.8~1.0 0.5~0.8
3/8"
1.0~1.3 0.5~0.8
Copper
Slanted Uneven Rough
tube
90
Pipe
Point down
Bar
Bar
"A"
Copper pipe
Clamp handle
Smooth all round
Inside is shining without scratches.
= Improper flaring =
Inclined
Surface
damaged
Even length
all round
Installation Manual 15
Installation
Reamer
Handle
Yoke
Cone
Red arrow mark
Cracked Uneven
thickness
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