Refrigerant Piping - LG AHNW166T0 Installation Manual

Refrigerant Piping

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 distance.
- Cut the cable 1.5m longer than the pipe length.
Burrs removal
- Completely remove all burrs 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 tubing.
Flaring work
- Carry out flaring work using flaring tool as
shown right.
Pipe
Gas Liquid
15.88(5/8) 9.52(3/8)
Firmly hold copper tube in a bar(or die) as indi-
cated dimension in the table above.
Pipe welding
- Insert and weld the pipe.
- Always make sure to flow Nitrogen at
0.2kgf/cm 2 within the pipe when welding.
- If the welding is done without flowing Nitrogen,
it can generate a thick oxidized coating within
the pipe to interfere with normal operation of
valve and compressor etc.
Insulation
- Use rubber foamed insulation material
(EPDM, NBR) with high thermal resistance.
- When installed in humid environment, use
thicker insulation material than usual.
- Insert the insulation material within the prod-
uct as deep as possible.
Classification
Liquid pipe(Ø9.52)
Gas pipe(Ø22.2)
h The thickness of the above insulation material is
based on thermal conduction rate of 0.036W/m°C.
CAUTION
There is no pump-down function because Indoor is the only heating unit. After vacuum drying, recharge the refrigerant.
Unit : mm(inch)
"A"
Gas Liquid
1.6~1.8 1.5~1.7
(0.63~0.71) (0.59~0.67)
Thickness
t9 or above
t19 or above
Copper
tube
90°
Pipe
Point down
Bar
Bar
"A"
Copper pipe
Clamp handle
Direction of Nitrogen
Copper tube
Taping
Inside product
Installation
Slanted Uneven Rough
Reamer
Handle
Yoke
Cone
Nitrogen
Red arrow mark
Nitrogen
Regulator
Nitrogen
Valve
Nitrogen Nitrogen Nitrogen
Panel
Insulation
Copper
tube
Installation Manual 25