Flaring Work And Connection Of Piping - LG LS-T1862AG Manual

2. Flaring Work and Connection of Piping

1) Flaring work
Main cause for refrigerant leakage is due to defect in
the flaring work. Carry out correct flaring work using the
following procedure.
1. Cut the pipes and the cable.
• Use the piping kit accessory or pipes purchased locally.
• Measure the distance between the indoor and the
outdoor unit.
• Cut the pipes a little longer than the measured
distance.
• Cut the cable 1.5m longer than the pipe length.
Copper
pipe
90°
2. Burr removal
• Completely remove all burrs from the cut cross sec-
tion of pipe/tube.
• Put the end of the copper tube/pipe in a downward
direction as you remove burrs in order to avoid drop-
ping burrs into the tubing.
Point down
3. Putting nut on
• 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)
Copper tube
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Slanted Uneven Rough
Pipe
Reamer
Flare nut
4. Flaring work
• Firmly hold copper pipe in a die in the dimension
shown in the table above.
Bar
Copper pipe
Clamp handle
• Carry out flaring work using flaring tool as shown
below.
Outside diameter
mm
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
5. Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the flared sec-
tion and re-flare it.
Smooth all round
Inside is shiny without scratches
Even length
all round
- 23 -
Handle
Bar
Yoke
Cone
Red arrow mark
inch mm
1/4 0~0.5
3/8 0~0.5
1/2 0~0.5
5/8 0~1.0
3/4 1.0~1.3
= Improper flaring =
Inclined Surface Cracked Uneven
damaged thickness
LGE Internal Use Only