LG LP-C508T / LP-H508T / LP-Z508T Service Manual ▷ View online
Installation of Unit
Installation Manual 13
ENGLISH
Connecting the Cable to Indoor Unit
• The inside and outside connecting cable can be connected after opening the inlet grille.
5
4
3
2(N)
1(L)
To outdoor unit
7
6
5
4(L2)
3(L1)
To outdoor unit
(America, Canada Only)
5
4
3
2(N)
1(L)
To outdoor unit
Plastic tube
(Bushing)
(Bushing)
1. Open the inlet grille manually.(Fig.1)
2. Open the terminal block cover with driver(
).
3. Connect the cables(LG doesn't sypply) to the Terminal Block in the front Bracket. (Fig.2)
4. Secure the terminal block cover to the original position with the screw.
5. Insert the plastic tube(Bushing)in small hole in order to prevent the connecting wires
from being cut by sharp edge of the hole. (Fig. 3) , America, Canada only.
6. Close the inlet grille.
(Fig.1)
(Fig.3)
Detail Wiring of Fig.2
1. Cooling Model
2. Heating Model
(Fig.2)
14 Floor Standing type Air Conditioner
Installation of Unit
Connecting pipings to the outdoor unit .
1. Align the center of the pipings and
sufficiently tighten the flare nut with fingers.
2. Finally tighten the flare nut with torque
wrench until the wrench clicks.
• When tightening the flare nut with torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
follows the arrow on the wrench.
1. Open the control board cover from the
outdoor unit by removing the screws.
2. Connect wires to the terminals on the control
board individually and secure the cables
onto the control board with clamp.
onto the control board with clamp.
3. Secure the control board cover to the
original position with the screws.
CAUTION: Perform grounding
• This product should be grounded.
• Defective grounding could cause an
• Defective grounding could cause an
electric shock.
Gas side piping
Liquid side piping
Torque wrench
Outdoor unit
PIPE SIZE
TORQUE
1/4"
1.8 Kg.m
3/8"
4.2 Kg.m
1/2"
5.5 Kg.m
5/8"
5.5 Kg.m
3/4"
6.5 Kg.m
Connecting the cables to the outdoor unit
4(L2)
Terminals on the indoor unit
3(L1)
6
7
5
4(L2)
Terminals on the outdoor unit
POWER INPUT
3(L1)
2(L2)
1(L1)
5
(America, Canada Only)
(America, Canada Only)
Installation of Unit
Installation Manual 15
ENGLISH
Power Supply and Wiring
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.
factory 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:
conditions:
• The working voltage should be higher than
90% and lower than 110% of the rated
voltage marked on the name plate.
voltage marked on the name plate.
• The starting voltage should be higher than
85% of the rated voltage marked on the
name plate.
name plate.
Voltage
Time
Starting point
Power source voltage
working voltage
working voltage
Starting voltage
• Use the power supply cord(Rubber
insulation, type Ho7RNF approved by HAR
or SAA) suitable for the product's
electriccal capacity.
or SAA) suitable for the product's
electriccal capacity.
• Provide a recognized circuit breaker as
below between power source and unit.
A disconnection device to adequately
disconnect all supply lines must be fitted.
(for service operations)
A disconnection device to adequately
disconnect all supply lines must be fitted.
(for service operations)
• The screws which fasten the wiring in the
casing 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 fastened.
(If they are loose, it could give rise to burn-
out of the wires.)
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 fastened.
(If they are loose, it could give rise to burn-
out of the wires.)
• See to it that the starting voltage is
maintained at more than 90 percent of the
rated voltage marked on the name plate.
rated voltage marked on the name plate.
• The following troubles would be caused by
voltage drop-down.
Vibration of a magnetic switch, damage on
the contact point there of, fuse breaking,
disturbance to the normal function of a
overload protection device.
Vibration of a magnetic switch, damage on
the contact point there of, fuse breaking,
disturbance to the normal function of a
overload protection device.
2. Wiring
After the confirmation of the above conditions, prepare the wiring as follows:
H/P
450/750V
2.5mm
2
C/O
450/750V
2.5mm
2
H/P
450/750V
4.0mm
2
C/O
450/750V
4.0mm
2
H/P
450/750V
5.5mm
2
C/O
450/750V
5.5mm
2
UNIT
VOLTS
Conductor
cross-sectional area
20K/28K/
30K/40K
44K/48K/
50K
80K
UNIT
Circuit breaker capacity
H/P
30A
C/O
30A
H/P
40A
C/O
40A
H/P
50A
C/O
50A
20K/28K/
30K/40K
44K/48K/
50K
80K
16 Floor Standing type Air Conditioner
Installation of Unit
Vacuum Drying of the Connecting Pipes and the Indoor Unit
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the
compressor.
compressor.
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service
port by the charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below -
76cmHg.
5. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon
wrench.
6. Tighten the valve stem nuts of the 2-way valve and 3-way valve.
7. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque: 1.8kg.m)
Indoor unit
Outdoor unit
Liquid side
CLOSE
OPEN
Vaccum pump
Gas side
Closed
Closed
2-way valve/
3-way valve
3-way
valve
Click on the first or last page to see other LP-C508T / LP-H508T / LP-Z508T service manuals if exist.