Refrigerant Piping; Cut The Pipes And The Cable; Burrs Removal - LG ARNH08GK3A2 Installation Manual

Installation

Refrigerant Piping

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 down-
ward 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/cm2 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
Gas pipe(Ø15.88 – 4HP)
(Ø22.2 - 8HP)
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 Hydro Kit is the only heating unit. After vacuum drying,
recharge the refrigerant.
18 Hydro Kit
Copper
tube
Copper tube
Thickness
t19 above
Slanted Uneven Rough
90°
Pipe
Point down
Direction of Nitrogen
Taping
Inside product
Reamer
Regulator
Valve
Nitrogen Nitrogen Nitrogen
Panel
Insulation
Copper
tube