LG LM-1963H2L Service Manual ▷ View online
–22–
Install certainly the decorative panel.
Cool air leakage causes sweating.
¤
Water drops fall.
8. INDOOR UNIT DRAIN PIPING
• Drain piping must have down-slope (1/50 to
1/100): be sure not to provide up-and-down slope
to prevent reversal flow.
to prevent reversal flow.
• During drain piping connection, be careful not to
exert extra force on the drain port on the indoor
unit.
unit.
• The outside diameter of the drain connection on
the indoor unit is 32mm.
• Be sure to execute heat insulation on the drain
piping.
Air conditioner
unit
unit
Ceiling
board
Decorative panel
Decorative
panel
panel
Fit the insulator (this part) and
be careful for cool air leakage
be careful for cool air leakage
Good example
Air
Cool air leakage
(no good)
Bad example
Ceiling
board
Air conditioner unit
Maintenance
drain port
drain port
Upward
routing
not allowed
routing
not allowed
Pipe clamp
Indoor unit
CAUTION
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
and pipe fittings
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
• Connect the main drain pipe to the exterior and
leave it provisionally until the test comes to an
end.
end.
• Feed water to the flexible drain hose and check
the piping for leakage.
• Be sure to check the drain pump for normal oper-
ating and noise when electrical wiring is complete.
• When the test is complete, connect the flexible
drain hose to the drain port on the indoor unit.
Heat insulation material: Polyethylene foam with thickness more than 8 mm.
Drain test
Feed water
Drain Pump
Drain pan
Flexible drain hose
(accessory)
(accessory)
Main
drain pipe
drain pipe
Glue the joint
Drain
port
port
Drain hose connection
Use the clip (accessory)
Use the clip (accessory)
–23–
1. Use the heat insulation material for the refriger-
ant piping which has an excellent heat-resis-
tance (over 120°C).
tance (over 120°C).
2. Precautions in high humidity circumstance:
This air conditioner has been tested according to
the "KS Standard Conditions with Mist" and con-
firmed that there is not any default. However, if it
is operated for a long time in high humid atmo-
sphere (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:
the "KS Standard Conditions with Mist" and con-
firmed that there is not any default. However, if it
is operated for a long time in high humid atmo-
sphere (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:
Indoor unit
Thermal insulator
(accessory)
(accessory)
Fastening band
(accessory)
(accessory)
Refrigerant piping
HEAT INSULATION
1. Wrap the connecting portion of indoor unit with
the Insulation material and secure it with two
Plastic Bands. (for the right pipings)
Plastic Bands. (for the right pipings)
• If you want to connect an additional drain hose,
the end of the drain-outlet should keep distance
from the ground. (Do not dip it into water, and fix
it on the wall to avoid swinging in the wind.)
from the ground. (Do not dip it into water, and fix
it on the wall to avoid swinging in the wind.)
2. Tape the Pipings, drain hose and Connecting
Cable from bottom to top.
3. Form the pipings gathered by taping along the
exterior wall and fix it onto the wall by saddle
or equivalent.
or equivalent.
In case of the Outdoor unit being installed
below position of the Indoor unit.
below position of the Indoor unit.
FORM THE PIPINGS
Trap is required to prevent water from entering
into electrical parts.
into electrical parts.
Seal a small opening
around the pipings
with gum type sealer.
around the pipings
with gum type sealer.
Drain
hose
Taping
Pipings
Connecting
cable
cable
Power supply
cord
cord
Plastic Band
• Heat insulation material to be prepared... Adiabatic glass wool with thickness 10 to 20mm.
• Stick glass wool on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas piping: thick
• Stick glass wool on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas piping: thick
piping) and drain piping, add further 10mm to 30mm thickness material.
–24–
2. Tape the Pipings and Connecting cable from
bottom to top.
3. Form the pipings gathered by taping along the
exterior wall, and make the trap prevent water
from entering into the room.
from entering into the room.
4. Fix the pipings onto the wall by saddle or
equivalent.
In case of the Outdoor Unit being installed above
position of the Indoor Unit.
position of the Indoor Unit.
Seal a small opening
around the pipings
with gum type sealer.
around the pipings
with gum type sealer.
Trap
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.
¤
For test run, carry out the cooling operation firstly even during heating season. If heating operation
is carried out firstly, it leads to the trouble of compressor. Then attention must be paid.
is carried out firstly, it leads to the trouble of compressor. Then attention must be paid.
¤Ł
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 room temperature checking button and down timer button for 3 sec-
onds at the same time.
• To cancel the test run, press any 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,
• 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.
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
–25–
Thermometer
2) Connection of power supply
1. Connect the power supply cord to the inde-
pendent power supply.
• Circuit breaker is required.
• 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).
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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