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2. Guideline for each installation process
2.2.2 Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.
1) Cut the pipes and the cable.
① Use the piping kit accessory or the pipes purchased locally.
② Measure the distance between the indoor and the outdoor
unit.
③ Cut the pipes a little longer than measured distance.
④ Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
① Completely remove all burrs from the cut cross section of
pipe/tube.
② Put the end of the copper tube/pipe in a downward direction
as you remove burrs in order to avoid dropping of burrs into
the tubing.
3) Putting nut on
① Remove flare nuts attached to indoor and outdoor unit, then
put them on pipe/tube having completed burr removal.(not
possible to put them on after flaring work)
4) Flaring work
① Carry out flaring work using flaring tool as shown below.
② Firmly hold copper pipe in a die in the dimension shown in the
table below.
Outer diameter
mm
inch
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
5) Check after flaring
① Compare the flared work with figure on right side.
② If flare is found to be defective, cut off the flared section and
do flaring work again.
7 _
Heat pump 50Hz/R410A
A
mm
1/4
1.1~1.3
3/8
1.5~1.7
1/2
1.6~1.8
5/8
1.6~1.8
3/4
1.9~2.1
Copper
Slanted Uneven Rough
tube
90°
Pipe
Point down
Flare nut
Copper tube
Bar
Bar
"A"
Copper pipe
Clamp handle
Smooth all round
Inside is shining without scratches
= Improper flaring =
Inclined
Surface
damaged
Even length
all round
Reamer
Handle
Yoke
Cone
Red arrow mark
Cracked Uneven
thickness
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