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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.
Cut the pipes and the cable
- Use the accessory piping kit or the pipes pur-
chased 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.
Burrs removal
- Completely remove all burrs from the cut
cross section of pipe/tube.
- Put the end of the copper tube/pipe to down-
ward direction as you remove burrs in order
to avoid to let burrs drop in the tubing.
Flaring work
- Carry out flaring work using flaring tool as
shown below.
Indoor unit
Pipe
[kW(Btu/h]
Gas
<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 in-
dicated dimension in the table above.
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 "
Liquid
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
21
Reamer
Handle
Yoke
Cone
Red arrow mark
Cracked Uneven
thickness
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