LG LT-B2860HL Service Manual ▷ View online
–32–
Install certainly the decorative panel.
Cool air leakage causes sweating.
Cool air leakage causes sweating.
¤
Water drops fall.
• Drain piping must have down-slope (1/50 to 1/100): be
sure not to provide up-and-down slope to prevent rever-
sal flow.
sal flow.
• During drain piping connection, be careful not to exert
extra force on the drain port on the indoor 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
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)
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 exteri-
or and leave it provisionally until the test
comes to an end.
comes to an end.
• Feed water to the flexible drain hose and
check the piping for leakage.
• Be sure to check the drain pump for nor-
mal operating and noise when electrical
wiring is complete.
wiring is complete.
• When the test is complete, connect the
flexible drain hose to the drain port on
the indoor unit.
the indoor unit.
Heat insulation material: Polyethylene foam with thickness more than 8 mm.
8. INDOOR UNIT DRAIN PIPING
Drain test
–33–
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.
Taping
Drain hose
Pipings
Connecting
cable
cable
Plastic Band
Power supply
cord
cord
• 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.
–23–
Indoor unit
Outdoor unit
B
A
• Rated performance for refrigerant line length of: 5m
• If 24K or 28K Model is installed at a distance of 15m, 500g of refrigerant
• If 24K or 28K Model is installed at a distance of 15m, 500g of refrigerant
should be added ....................................................(15-5)x50g
NOTE:
• Thoroughly study the following installation locations:
1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the
turbo fan, the fin of the heat exchanger and the drain pump, resulting in heat exchange reduction,
spraying, dispersing of water drops, drain pump malfunction, etc.
In these cases, take the following actions:
• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient
spraying, dispersing of water drops, drain pump malfunction, 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 oily 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.
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
Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.
for smoke-collecting
hood with sufficient
capacity.
Cooking table
Air conditioner
Take enough
distance
distance
MODEL
24K, 28K, 30K BTU 5/8"
3/8"
5
20
36K BTU
3/4"
3/8"
5
25
GAS
LIQUID
5
15
50
5
20
70
Elevation B(m)
Length A(m)
* Additional
refrigerant
(g/m)
Pipe Size
Rated
Rated
Max.
Max.
–24–
• The dimensions of the paper model for installing are
the same as those of the ceiling opening dimen-
sions.
sions.
• Select and mark the position for fixing bolts and pip-
ing hole.
• Decide the position for fixing bolts slightly tilted to
the drain direction after considering the direction of
drain hose.
drain hose.
• Drill the hole for anchor bolt on the wall.
,,,
Level gauge
Unit:mm
Ceiling
800 Unit size
800 Unit size
720 (Hanging bolt)
60
60
840 (Ceiling opening)
840 (Ceiling opening)
624(Hanging bolt)
108
108
600
120
120
Ceiling board
• This air-conditioner uses a drain pump.
• Horizontly install the unit using a level gauge.
• During the installation, care must be taken not to
• Horizontly install the unit using a level gauge.
• During the installation, care must be taken not to
damage electric wires.
CAUTION
2. Ceiling opening dimensions and hanging bolt location
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