Preparation Of Piping - LG MULTI V S ARUB060GSS4 Installation Manual

Spring washer
Frame Concrete
Nut
base
H-Beam
WARNING
!
• Install where it can sufficiently support the weight of the outdoor
unit.
If the support strength is not enough, the outdoor unit may drop
and hurt people.
• Install where the outdoor unit may not fall in strong wind or
earthquake.
If there is a fault in the supporting conditions, the outdoor unit
may fall and hurt people.
• Please take extra cautions on the supporting strength of the
ground, water outlet treatment(treatment of the water flowing
out of the outdoor unit in operation), and the passages of the
pipe and wiring, when making the ground support.
• Do not use tube or pipe for water outlet in the Base pan. Use
drainage instead for water outlet. The tube or pipe may freeze
and the water may not be drained.
CAUTION
!
• Be sure to remove the Pallet(Wood Support) of the bottom side
of the outdoor unit Base Pan before fixing the bolt. It may cause
the unstable state of the outdoor settlement, and may cause
freezing of the heat exchanger resulting in abnormal operations.
• Be sure to remove the Pallet(Wood Support) of the bottom side
of the outdoor unit before welding. Not removing Pallet(Wood
Support) causes hazard of fire during welding.
Pallet(Wood Support)
- Remove before Installation
If it is necessary to prevent the unit from falling over, install as shown
in the figure.
• Prepare all 4 wires as indicated in the drawing
• Unscrew the top plate at the 4 location indicated A and B
• Put the screws through the nooses and screw them back tight
A
B
C

Preparation of Piping

Main cause of gas leakage is defect in flaring work. Carry out correct
flaring work in the following procedure.
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 1 500 mm (59-1/16 inch) longer than the pipe length.
Unit : mm(inch)
Anti-vibration
materials
Four bolt are
required
3 thread ridges
A : Location of the 2 fixation
holes on the front side of
the unit
B : Location of the 2 fixation
holes on the rear side of
the unit
C : wires
Copper
Slanted Uneven Rough
tube
90°
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.
Flaring work
- Carry out flaring work using flaring tool as shown below.
Pipe diameter
inch (mm)
Wing nut type
Ø 1/4 (Ø 6.35) 0.04~0.05 (1.1~1.3)
Ø 3/8 (Ø 9.52) 0.06~0.07 (1.5~1.7)
Ø 1/2 (Ø 12.7) 0.06~0.07 (1.6~1.8)
Ø 5/8 (Ø 15.88) 0.06~0.07 (1.6~1.8)
Ø 3/4 (Ø19.05) 0.07~0.08 (1.9~2.1)
Flare nut
Copper tube
<Wing nut type>
Firmly hold copper tube in a bar(or die) as indicated dimension in the
table above.
Check
- Compare the flared work with figure below.
- If flare is noted to be defective, cut off the flared section and do
flaring work again.
Smooth all round
Inside is shining without scratches.
Inclined
Even length
all round
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 Tightening Torque
[N . m (lbs . ft)]
[mm (inch)]
Ø 9.52 (3/8) 38±4 (28±3.0) 12.8 (0.5) ~ 13.2 (0.52)
Ø 12.7 (1/2) 55±6 (41±4.4) 16.2 (0.64) ~ 16.6 (0.65)
Ø 15.88 (5/8) 75±7 (55±5.2) 19.3 (0.76) ~ 19.7 (0.78)
9
Pipe
Reamer
Point down
A inch (mm)
Clutch type
0~0.02
(0~0.5)
Bar
"A"
Copper pipe
<Clutch type>
= Improper flaring =
Surface Cracked Uneven
damaged thickness
A [mm (inch)] Flare shape
90°
±2
A
R=0.4~0.8