LG LP-F8081ZL Service Manual ▷ View online
–19–
2) Preparation of installation parts and tools
No.
Installation Parts, Tools
Use
1
Pipe cutter (MAX 35mm Copper pipe)
Cutting the pipings
2
Remear
Remove burrs from cut edges of pipes.
3
Wrench (H5, H4 hexagonal wrench)
To open the service valve
4
Pipe bender
Bending the pipings
5
Leak detector
Check a gas-leakage of connecting part
of the pipings
of the pipings
6
Manifold gauge
To measure the pressure, to charge the refrigerant
7
Charge-nipple
To connect the bombe
8
Vacuum pump
To remove the air in the pipe.
9
Charge cylinder balance
To measure the refrigerant amount
10
Bombe (Freon-22)
Gas charge
Air purge
Cleaning the pipe
Air purge
Cleaning the pipe
11
Spanner
To tighten the connecting parts of the pipings
12
Monkey spanner
13
Driver( , )
14
Benchi (150mm)
Cutting the wires
15
Tapeline
To measure the length
16
Core drill
To make holes through the concrete wall and blocks
17
Voltmeter, Amperemeter, Clampmeter
To measure the current and voltage
18
Insulation resistance tester
To measure the insulation resistance
19
Glass thermometer
To measure the intake and outlet air temperature of the indoor unit
20
Copper tubes
To use the connecting pipings
21
Insulation material
To cover the connecting pipings
22
Tape
To finish the connecting pipings
23
Electrical Leakage Breaker
To shut off the main power
24
Cable
To connect the cable from outdoor unit to indoor unit
27
Drain hose sockets, elbows
To remote the condensing water
–20–
➀
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.
➁
Remove burrs.
• Remove burrs from cut edges of pipes.
• Turn the pipe end down to avoid the metal pow-
der entering the pipe.
Caution:
If burrs are not removed, they may cause a gas
leakage.
leakage.
2) Connection of piping
➀
Move the indoor tubing and drain hose to the hole
• Remove tubing holder and pull the tubing out of the chassis.
➁
Replace the tubing holder into original position
➂
Route the tubing and the drain hose staight backwards.
➃
Insert the connecting cable into the indoor unit through the hole.
• Do not connect the cable to the indoor unit
• Make a small loop with the cable for easy connection later.
• Make a small loop with the cable for easy connection later.
➄
Tape the tubing and the connecting cable.
➅
Indoor unit installation.
➆
Connecting the pipings to the indoor unit.
• Align the center of the pipings and suffciently tighten the flare nut with fingers.
• Finally, tighten the flare nut with troque wrench until the wrench clicks.
When tightening the flare nut with troque wrench, ensure the direction for tightening follows the arrow on the
wrench.
wrench.
90
°
Pipe cutter
Slanted
Rough
Pipe
Point down
Reamer
5-3. Piping of Indoor Unit
1) Preparation of piping
–21–
3) Precautions in bending
➀
If it is necessary to bend or stretch the tubing,
use the spring which is attached to the tubing in
stead of pipe bender.
use the spring which is attached to the tubing in
stead of pipe bender.
• Please make a careful notice to make a smooth
line.
• Hold the tubing with your two hands closely and
then bend or stretch it slowly not to make any
crack.
crack.
• Remember that the radius (R) should not exceed
70mm (Refer to Fig. 1)
➁
Do not repeat the bending process to prevent the
tubing from cracking or crushing.
tubing from cracking or crushing.
➂
Keep in mind that the bending part should not be
cracked and make the radius (R) as long as possible
(Refer to Fig. 2)`
cracked and make the radius (R) as long as possible
(Refer to Fig. 2)`
Spring
R70mm
(Fig. 1)
(Fig. 2)
R
5-4. Connecting Piping to Outdoor Unit
1) Connecting pipings to the outdoor unit
➀
Upon connecting 4-way valves, please weld connecting pipes using elbows instead of connecting pipes with
flare nuts.
flare nuts.
5-5. Connecting the Cable
➀
Open the control board cover from the outdoor unit by
removing the screws.
removing the screws.
➁
Connect wires to the terminals on the control board
individually and secure the cables onto the control
board with clamp.
individually and secure the cables onto the control
board with clamp.
MODEL
Circuit breaker capacity
80K
50A
(BTU/h)
–22–
5-6. Power Supply and Wiring
Voltage
Time
Starting point
Power source voltage
working voltage
working voltage
Starting voltage
The unit is completely wired internally at the factory
according to general rule of electrical technology, but
local rules, if they are required, should be complied
with.
according to general rule of electrical technology, but
local rules, if they are required, should be complied
with.
1) Power Supply
Power source must fulfill the following conditions:
¤
The working voltage should be higher than
90% and lower than 110% of the rated voltage
marked on the name plate.
90% and lower than 110% of the rated voltage
marked on the name plate.
¤Ł
The starting voltage should be higher than
85% of the rated voltage marked on the name
plate.
85% of the rated voltage marked on the name
plate.
¤Ł
Provide a recognized circuit breaker as below
between power source and unit.
A disconnection device to adequately discon-
nect all supply lines must be fitted.
(for service operations)
between power source and unit.
A disconnection device to adequately discon-
nect all supply lines must be fitted.
(for service operations)
¤Ø
The screws which fasten the wiring in the cas-
ing of electrical fittings are liable to come loose
from vibrations to which the unit is subjected
during the course of transportation. Check
them and make sure that they are all tightly fas-
tened.
(If they are loose, it could give rise to burn-out
of the wires.)
ing of electrical fittings are liable to come loose
from vibrations to which the unit is subjected
during the course of transportation. Check
them and make sure that they are all tightly fas-
tened.
(If they are loose, it could give rise to burn-out
of the wires.)
¤Œ
See to it that the starting voltage is maintained
at more than 90 percent of the rated voltage
marked on the name plate.
at more than 90 percent of the rated voltage
marked on the name plate.
¤º
The following troubles would be caused by volt-
age drop-down.
Vibration of a magnetic switch, damage on the
contact point there of, fuse breaking, distur-
bance to the normal function of a overload pro-
tection device.
age drop-down.
Vibration of a magnetic switch, damage on the
contact point there of, fuse breaking, distur-
bance to the normal function of a overload pro-
tection device.
2) Wiring
After the confirmation of the above conditions, pre-
pare the wiring as follows:
pare the wiring as follows:
¤
Use the power supply cord(Rubber insula-
tion, type Ho7RNF approved by HAR or SAA)
suitable for the product's electriccal capacity.
tion, type Ho7RNF approved by HAR or SAA)
suitable for the product's electriccal capacity.
MODEL
80K
(BTU/h)
VOLTS
Conductor
cross-sectional area
450/ 750V
5.5mm
2
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