LG LMU240HE Service Manual - Page 21

Flaring Work and Connection of Piping

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Flaring Work and Connection of Piping Flaring Work and Connection of Piping 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. Copper 3. Cut the pipes a little longer than measured distance. pipe 90° Slanted Uneven Rough 4. Cut the cable 1.5m (5.0ft) longer than the pipe length. 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 burrs into the tubing. Pipe Reamer 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) Point down Flare nut Flaring work • Carry out flaring work using flaring tool as shown below. • Firmly hold copper pipe in a die in the dimension shown in the table above. Outside diameter mm inch Ø6.35 1/4 Ø9.52 3/8 A mm 0~0.5 0~0.5 Copper tube Handle "A" Bar Bar Yoke Cone Copper pipe Clamp handle Red arrow mark Service Manual 21

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Service Manual
21
Flaring Work and Connection of Piping
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 1.5m (5.0ft) longer than the pipe length.
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 burrs into the
tubing.
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)
Flaring work
•
Carry out flaring work using flaring tool as shown below.
•
Firmly hold copper pipe in a die in the dimension shown in the
table above.
Copper
pipe
90
°
Slanted
Uneven
Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
mm
inch
mm
Ø
6.35
1/4
0~0.5
Ø
9.52
3/8
0~0.5
Outside diameter
A
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Flaring Work and Connection of Piping