Flaring Work - LG ATNH24GPLE2 User Manual

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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.
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 1.5(4.92) m(ft) 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 1/4
Ø9.52 3/8
Ø12.7 1/2
Ø15.88 5/8
Ø19.05 3/4
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.
A
mm inch
1.1~1.3 0.04~0.05
1.5~1.7 0.06~0.07
1.6~1.8 0.06~0.07
1.6~1.8 0.06~0.07
1.9~2.1 0.07~0.08
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
Heat pump 60Hz/R410A
Reamer
Handle
Yoke
Cone
Red arrow mark
Cracked Uneven
thickness
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