LG APUC488TLA0, Installation Manual

Page: 13 / 23

INSTALLATION OF UNIT
13
ENGLISH
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 1.5 m 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.
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)
Flaring work
- Carry out flaring work using dedicated flaring
tool for R410A as shown below.
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.
Outside diameter A
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Pipe
Reamer
Point down
Copper
tube
90°
Slanted Uneven Rough
B ar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
B ar
"A"
Flare nut
Copper tube
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Preparation of Piping