LG LP-K3060HL Service Manual ▷ View online
28K/30K/40K
Gas side piping
Liquid side piping
Torque wrench
Outdoor unit
1
2
4
3
5
6
CLAMP
(Ø10.7)
(Ø10.7)
TO INDOOR UNIT CONNECTOR
POWER SUPPLY
–22–
1) Connecting pipings to outdoor unit
¤
Align the center of the pipings and sufficiently
tighten the flare nut with fingers.
tighten the flare nut with fingers.
¤Ł
Finally tighten the flare nut with torque wrench
until the wrench clicks.
until the wrench clicks.
• When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the
arrow on the wrench.
arrow on the wrench.
2) Connecting cable to outdoor unit
¤
Open the control board cover from the outdoor unit
by removing the screws.
by removing the screws.
¤Ł
Connect wires to the terminals on the control
board individually and secure the cables onto the
control board with clamp.
board individually and secure the cables onto the
control board with clamp.
■
Connecting Piping and the Cable to Outdoor Unit
PIPE SIZE
TORQUE
3/8"
4.2 Kg.m
1/2"
5.5 Kg.m
5/8"
5.5 Kg.m
3/4"
6.5 Kg.m
Perform grounding
• This product should be grounded.
• Defective grounding could cause an electric shock.
CAUTION
–23–
H/P
450/750V
4.0mm
2
13.3mm
C/O
450/750V
2.5mm
2
11.8mm
UNIT
Circuit breaker capacity
Voltage
Time
Starting point
Power source voltage
working voltage
working voltage
Starting voltage
The unit is completely wired internally at the fac-
tory according to general rule of electrical tech-
nology, but local rules, if they are required, should
be complied with.
tory according to general rule of electrical tech-
nology, 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 insulation,
type Ho7RNF approved by HAR or SAA) suit-
able for the product's electriccal capacity.
type Ho7RNF approved by HAR or SAA) suit-
able for the product's electriccal capacity.
■
Power Supply and Wiring
UNIT
VOLTS
Conductor
cross-sectional area
Outside
diameter
H/P
30A
C/O
30A
30K
30K
–26–
1. PRECAUTIONS IN TEST RUN
• The initial power supply must provide at least 90% of the rated voltage.
Otherwise, the air conditioner should not be operated.
Carry out the test run more than 5 minutes without fail.
(Test run will be cancelled 18 minutes later automatically)
(Test run will be cancelled 18 minutes later automatically)
• The test run is started by pressing the down room temperature checking button and ON/OFF button for 3 sec-
onds at the same time.
• To cancel the test run, press ON/OFF button.
• After completing work, be sure to measure and record trial run properties, and store measured data, etc.
• Measuring items are room temperature, outside temperature, suction temperature, blow out temperature,
wind velocity, wind volume, voltage, current, presence of abnormal vibration and noise, operating pressure,
piping temperature, compressive pressure.
piping temperature, compressive pressure.
• As to the structure and appearance, check following items.
2. Connection of power supply
1. Connect the power supply cord to the independent power supply.
• Circuit breaker is required.
2. Operate the unit for fifteen minutes or more.
3. Evaluation of the performance
1. Measure the temperature of the intake and discharge air.
2. Ensure the difference between the intake temperature and the discharge one is more than 8°C (Cooling) or
reversely (Heating).
CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE
Caution
¡
Is the circulation of air adequate?
¡
Is the draining smooth?
¡
Is the heat insulation complete
(refrigerant and drain piping)?
¡
Is there any leakage of refrigerant?
¡
Is the remote controller switch operated?
¡
Is there any faulty wiring?
¡
Are not terminal screws loosened?
M4...118N.cm{12kgf.cm}
M5...196N.cm{20kgf.cm}
M6...245N.cm{25kgf.cm}
M8...588N.cm{60kgf.cm}
Test running
–27–
CAUTION
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method of wiring,
be guided by the circuit diagram pasted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) The screw 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.)
make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the
wires.)
4) Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked
on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) 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.
• Proper starting power is not given to the compressor.
Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning,
temperature control, etc.).
temperature control, etc.).
HAND OVER
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