Heat Insulation - LG URNU48GVLA2.ENWALEU Manual Del Usuario

Installation
CAUTION
• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are
present.
• When loosening a flare nut, always use two wrenches in
combination, When connecting the piping, always use a spanner
and torque wrench in combination to tighten the flare nut.
• When connecting a flare nut, coat the flare(inner and outer faces)
with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as
the initial tightening.
Opening shutoff valve
1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.
2. Turn it until the shaft stops.
Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a
backseat type. Always use the special tool.
3. Make sure to tighten the cap securely.
Closing shutoff valve
1. Remove the cap and turn the valve clockwise with the hexagon wrench.
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
* For the tightening torque, refer to the table on the below.
Tightening torque
Shutoff
valve size Shaft(valve body)
Ø6.35
5.4-6.6
Ø9.52
8.1-9.9
Ø12.7
13.5-16.5
Ø15.88
Ø22.2
27-33
Ø25.4

HEAT INSULATION

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over
120°C).
2. Precautions in high humidity circumstance:
This air conditioner has been tested according to the
"ISO Conditions with Mist" and confirmed that there is
not any default. However, if it is operated for a long
time in high humid atmosphere (dew point tempera-
ture: more than 23°C), water drops are liable to fall. In
this case, add heat insulation material according to the
following procedure:
• Heat insulation material to be prepared... EPDM
(Ethylene Propylene Diene Methylene)-over 120°C
the heat-resistance temperature.
• Add the insulation over 10mm thickness at high humidity environment.
10 Indoor Unit
Tightening torque N-m(Turn clockwise to close)
Cap(Valve lid) Service port
13.5-16.5
Hexagonal
wrench 4mm
18-22
Hexagonal
23-27
wrench 6mm
Hexagonal
36-44
wrench 10mm
Flare nut
14-17
33-39
50-60
11.5-13.9
62-75
-
Indoor unit
Union
Gas line piping attached to unit
-
22-28
Fastening band
(accessory)
Refrigerant piping
Thermal insulator
(accessory)