LG Multi V ARWN Series Installation Manual page 10

10
Opening shutoff valve
1
Remove the cap and turn the valve counter clockwise with the
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 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
Tightening torque N·m(Turn clockwise to close)
Shaft
Shutoff
(valve body)
valve
size
Opened Hexagonal
Closed
wrench
Ø6.35
6.0±0.6
Ø9.52 4mm
Ø12.7 10.0±1.0
Ø15.88 12.0±1.2 5.0±0.0
5mm
Ø19.05 14.0±1.4
Ø22.2
30.0±3.0 8mm
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 Condi-
tions with Mist" and confirmed that there is not any default. How-
ever, if it is operated for a long time in high humid atmosphere
(dew point temperature: more than 23°C), water drops are liable to
fall. In this case, add heat insulation material according to the fol-
lowing procedure:
- Heat insulation material to be prepared... EPDM (Ethylene Propy-
lene Diene Methylene)-over 120°C the heat-resistance tempera-
ture.
- Add the insulation over 10mm thickness at high humidity environ-
ment.
Indoor unit
Gas line piping
Cap Service Flare
(Valve lid) port nut attached to unit
16±2
17.6±2.0
38±4
20.0±2.0 55±6
-
12.7±2 75±7
110±10
25.0±2.5
-
25±3
Fastening band
(accessory)
Refrigerant piping
Thermal insulator
(accessory)
3
Standard refrigerant pipe EPDM heat insulation material thickness.
Air conditioned location
Classification
Note1)
General location
Ø6.35
Above t9
Liquid
Ø9.52
pipe
Above Ø12.7 Above t13
Ø9.52
Ø12.7
Ø15.88
Above t13
Ø19.05
Ø22.22
Gas
Ø25.4
pipe
Ø28.58
Ø31.75
Ø34.9 Above t19
Ø38.1
Ø44.45
Note 1) General location: When the pipe passes through indoors in
which the indoor unit is operated
- Apartment, classroom, office, mall, hospital, office-tel etc.
Note 2) Special location
1
When the location is air conditioned but has severe temper-
ature/humidity difference due to high ceiling
- Church, auditorium, theater, lobby etc.
2
When the location is air conditioned but the internal temper-
ature/humidity of the ceiling finishing is high
- Bathroom/swimming pool locker room etc.
(Building with roof ceiling of sandwich assembly type)
Note 3) General location: When the pipe passes indoors where the in-
door unit is not operated
- Hall way etc. (Dormitory, school, office-tel)
Note 4) Negative condition: When below conditions 1 and 2 are met.
1
When the pipe passes indoors where the indoor unit is not
operated
2
When the humidity is high, regionally, and there is no air
flow in the pipe passing area
- When installing the outside unit within the outside pipe
tray or at a location where it is ok to have freezes, apply
13t.
- If you are not sure with the selection of heat insulation ma-
terial, coordinate with the supervision or HQ.
- The thickness of the above heat insulation material is
based on the heat conductivity of 0.088W/m°C.
Plumbing materials and storage methods
Pipe must be able to obtain the specified thickness and should be
used with low impurities.
Also when handling storage, pipe must be careful to prevent a frac-
ture, deformity and wound.
Should not be mixed with contaminations such as dust, moisture.
Non-air conditioned location
Note2) Note3) Note4)
Special location General location Negative condition
Above t9 Above t9 Above t9
Above t13 Above t13 Above t13
Above t19 Above t19
Above t25
Above t25 Above t25