Preparation Of Piping; Cut The Pipes And The Cable; Burrs Removal; Putting Nut On - LG ATNH126ELFC Service Manual

Connecting Pipes to the Indoor Unit

Preparation of Piping

Main cause of gas leakage is defect in flaring work.
Carry out correct flaring work in the following proce-
dure.

1. 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 dis-
tance.
• 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. Putting nut on

• Remove flare nuts attached to indoor and outdoor
units, than put them on pipe/tube having complet-
ed burr removal.
(Not possible to put them on after flaring work)

4. Flaring work

• Carry out flaring work using dedicated flaring tool
for R-410A as shown below.
Outside diameter
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
5. 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
inch mm
1/4 0~0.5
3/8 0~0.5
1/2 0~0.5
5/8 0~1.0
3/4 0~1.0
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
Installation
Reamer
Handle
Yoke
Cone
Red arrow mark
Cracked Uneven
thickness
Service Manual 43