Flaring Work And Connection Of Piping; Flaring Work - LG LS301HE Service Manual

Flaring work and connection of piping

Flaring work and connection of piping

Flaring work

Main cause for gas leakage is due to defect in flar-
ing work. Carry out correct flaring work in the follow-
ing procedure.
1. Cut the pipes and the cable.
Use the piping kit accessory or the pipes
purchased locally.
Measure the distance between the indoor and the
outdoor unit.
Cut the pipes a little longer than measured
distance.
Cut the cable 1.5m(59.1") longer than the pipe
length.
Copper
pipe
90°
2. Burrs removal
Completely remove all burrs from the cut cross
section of pipe/tube.
Put the end of the copper tube/pipe in a down-
ward direction as you remove burrs in order to
avoid dropping 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 complet-
ed burr removal.
(not possible to put them on after flaring work)
Copper tube
14 Room Air Conditioner
Slanted Uneven Rough
Pipe
Reamer
Flare nut
4. Flaring work
Carry out flaring work using flaring tool as shown
below.
Outside diameter
mm
ø6.35
ø9.52
ø12.7
ø15.88
Firmly hold copper pipe in a die in the dimension
shown in the table above.
Bar
Bar
Copper pipe
Clamp handle
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.
Smooth all round
Inside is shiny without scratches
Inclined
Even length
all round
A
inch mm
1/4 0 ~ 0.5
3/8 0 ~ 0.5
1/2 0 ~ 0.5
5/8 0 ~ 1.0
Handle
Yoke
Cone
Red arrow mark
= Improper flaring =
Surface Cracked Uneven
damaged thickness