LG Hydro Kit ARNH04GK2A4, Installation Manual, Page: 22 / 63

22 Hydro Kit
Cut the pipes and the cable
- Use the accessory piping kit 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 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
downward direction as you remove burrs in
order to avoid to let burrs drop in the tubing.
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
product as deep as possible.
h
The thickness of the above insulation material
is based on thermal conduction rate of
0.036W/m °C.
When installing independent power module,
refrigerant piping should be installed in
accordance with the manual of independent
power module
Copper
tube
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Copper tube
Direction of Nitrogen
Regulator
Taping
Valve
Nitrogen Nitrogen Nitrogen
Panel
Inside product
Insulation
Copper
tube
Refrigerant Piping
Classification Thickness
Liquid pipe(Ø9.52) t9 or above
Gas pipe(Ø22.2 - 10HP
Ø15.88 - 4HP)
t19 or above
Installation