LG GP-W500B6C, Installation Manual

Page: 28 / 91

28
REFRIGERANT PIPING
ENGLISH
Main cause of gas leaks is a bad (poor) flaring
work. Perform the flaring work properly in the
following instructions.
Cut the pipes and the cables
- Use the authentic parts/tools purchased in
the market or the piping tools included in the
product as accessories.
- Measure the distance between the indoor
and the outdoor unit.
- Cut the pipes a little longer than the meas-
ured distance.
- Cut the cable 1.5m longer than the pipe
length.
Copper
tube
90
Slanted Uneven Rough
Piping Work
Check
- Compare the flared work with the figure in
the right.
- If flare is noted defective, cut off the flared
section and do flaring work again.
Burrs removal
- Remove all burrs completely 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 copper tube.
Flaring work
- Perform the flaring work using flaring tools
as shown below.
Total capacity
of indoor unit
Pipes(mm) " A "
Gas
pipe
Liquid
pipe
Gas
pipe
Liquid
pipe
Less than 6kW Ø 12.7 Ø 6.35 1.6~1.8 1.1~1.3
Less than 16kW Ø 15.88 Ø 9.52 1.6~1.8 1.5~1.7
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Piping connection
- Lay pipes following the piping passage. Do
not bend more than 3 times in the same
spot. Do not bend reversely.
- Fit the union of the indoor unit into the cen-
ter of the pipe after pipe modification, and
tighten them with a spanner.
- Connect the pipe into the service valve of
outdoor unit.
- Check for gas leaks in the connecting area
between the outdoor unit and indoor unit
after piping.
h
Use a welding type for indoor units with ca-
pacity of more than 16kW
Hold the cooper tube firmly in a bar (or die) as
indicated dimension in the table above.
Pipe
Reamer
Point down
Diameterm (mm)
Flare nut tightening
torque (N·m)
Ø 6.35 16 ± 2
Ø 9.52 38 ± 4
Ø 12.7 55 ± 5
Ø 15.88 75 ± 7
Ø 19.05 110 ± 10
CAUTION
When tightening, use two torque wrenches.
!