LG LB-E4880CL / LB-E6080CL Service Manual ▷ View online
–19–
Ceiling
CAUTION
1~3mm
Drainage hole
Drainage hole
Make sure to be closed.
Unit
Drainage pipe
(Local supply)
(Local supply)
Thermal insulator
(Local supply)
Drainage hole
Front of view
CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING
UNIT AND DRAIN PIPING
Lay the drain hose with a downward inclination
so water will drain out.
so water will drain out.
• Alway lay the drain with downward inclina-
tion (1/50 to 1/100).
Prevent any upward flow or reverse flow in
any part.
Prevent any upward flow or reverse flow in
any part.
• 5mm or thicker formed thermal insulator
shall always be provided for the drain pipe.
1. Install declination of the indoor unit is very important for the drain of the duct type air conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 5mm.
• The unit must be horizontal or declined to the drain hose connected when finished installation.
CORRECT
CORRECT
INCORRECT
INCORRECT
• Upward routing not
allowed
–20–
• Drill the piping hole with 70mm dia, hole
core drill.
• Piping hole should be slightly slant to the
outdoor side.
INSULATION, OTHERS
Insulate the joint and tubes completely.
All thermal insulation must comply with local requirement.
INDOOR UNIT
REFRIGERANT PIPE
• Insulate and tape both the gas piping and liquid piping.
THERMAL INSULATION
5~7mm
Indoor
Outdoor
WALL
Make sure that there is no clearance here.
Overlap with thermal
insulator for piping.
insulator for piping.
Thermal insulator for refrigerant pipe
(Local supply)
(Local supply)
Thermal insulator for
piping(Local supply)
piping(Local supply)
Hose crip for thermal insulator(Local supply)
Union for liquid pipe
Refrigerant pipe and thermal
insulator(Local supply)
insulator(Local supply)
Union for gas pipe
Thermal insulator for refrigerant pipe
(Local supply)
(Local supply)
Hose crip for thermal insulator
(Local supply)
(Local supply)
Connecting cable
Liquid pipe
Thermal insulator
Gas pipe
Tape
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.
–21–
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
Seal a small opening
around the pipings
with gum type sealer.
around the pipings
with gum type sealer.
Trap
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
In case of the Outdoor unit being installed
below position of the Indoor unit.
below position of the Indoor unit.
FORM THE PIPINGS
–11–
Indoor unit
Outdoor unit
B
A
• If 48K Model is installed at a distance of 15m, 700g of
refrigerant should be added (15-7.5) x 70g = 525g
• Capacity is based on standard length and maximun
allowance length is on the basis of reliability.
NOTE:
• Throughly study the following installation locations:
1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the
fan, the fin of the heat exchanger, resulting in heat exchange reduction, spraying, dispersing of water
drops, etc.
In these cases, take the following actions:
• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient
drops, etc.
In these cases, take the following actions:
• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient
capacity so that it draws oily steam which should not flow into the suction of the air conditioner.
• Make enough distance from a cooking room to install the air conditioner in such a place where it
may not suck in oil steam.
2. Avoid installing air conditioner in such circumstances where cutting oil mist or iron powder is in sus-
pension in factories, etc.
3. Avoid places where inflammable gas is generated, flows in, is stored or vented.
4. Avoid places where sulfurous acid gas or corrosive gas is generated.
5. Avoid places near high frequency generators.
3) Piping length and the elevation
MODEL
48K BTU
3/4"
1/2"
5
30
60K BTU
3/4"
1/2"
5
30
Gas
Liquid
5
30
70
5
30
70
Elevation B(m)
Length A(m)
* Additional
refrigerant
(g/m)
Pipe Size
(Diameter: Ø)
Standard
Standard
Max.
Max.
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