Heat Insulation - LG MULTI V mini R410A Manual Del Usuario

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE
Precautions when connecting pipes
• See the following table for flare part machining dimensions.
• When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three
or four times at first. (Use ester oil or ether oil.)
• See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)
• After all the piping has been connected, use nitrogen to perform a gas leak check.
Pipe size(mm/inch) Tightening torque
9.52 (3/8) 3.4-4.2(24.6-30.4)
12.7 (1/2) 5.5-6.6(39.8-47.7)
15.88 (5/8) 6.3-8.2(45.6-59.3)
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.

HEAT INSULATION

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance
(over 248°F).
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
temperature: more than 73°F), 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 248°F
the heat-resistance temperature.
• Add the insulation over 10mm thickness at high humidity environment.
A (mm /inch)
(Kgf·m/lbf·ft)
12.6-13.0 (1/2)
15.8-16.2 (5/8)
19.0-19.4(3/4)
flare shape
Indoor unit
Installation
90° ±2
A
R=0.4~0.8
Union
Fastening band
(accessory)
Refrigerant piping
Thermal insulator
(accessory)
Installation Manual 21