LG LWC1260ACG Service Manual ▷ View online
—16—
2.3.7 MOTOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the evaporator. (Refer to section 2.2.1)
3. Remove the orifice. (Refer to section 2.2.1)
4. Remove the blower. (Refer to section 2.2.1)
5. Remove the fan. (Refer to section 2.2.2)
6. Remove the control box cover and disconnect 5 or
2. Remove the evaporator. (Refer to section 2.2.1)
3. Remove the orifice. (Refer to section 2.2.1)
4. Remove the blower. (Refer to section 2.2.1)
5. Remove the fan. (Refer to section 2.2.2)
6. Remove the control box cover and disconnect 5 or
4 wires of motor housing. (Refer to section 2.1.3)
7. Remove the 4 screws which fasten the motor from
the mount motor. (See Figure 14.)
8. Remove the motor.
9. Re-install the components by referring to the
9. Re-install the components by referring to the
removal procedure, above.(See Figure 14.)
2.4 REFRIGERATING CYCLE
2.4.1 CONDENSER
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the 4 screws which fasten the
2. Remove the 4 screws which fasten the
brace.(Refer to section 2.2.1)
3. Remove the 5 screws which fasten the condenser
and shroud.
4. After discharging the refrigerant completely,
unbraze the interconnecting tube at the condenser
connections.
connections.
5. Remove the condenser.
6. Re-install the component by referring to notes.
6. Re-install the component by referring to notes.
(See Figure 15)
2.4.2 EVAPORATOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the 2 screws which fasten the evaporator.
3. Move the evaporator sideways carefully.
2. Remove the 2 screws which fasten the evaporator.
3. Move the evaporator sideways carefully.
(Refer to section 2.2.1)
4. After discharging the refrigerant completely,
unbraze the interconnecting tube at the evaporator
connections.
connections.
5. Remove the evaporator.
6. Re-install the component by referring to notes.
6. Re-install the component by referring to notes.
(See Figure 16)
Figure 14
Figure 15
Figure 16
Discharge the refrigerant system using a
Freon
Freon
TM
Recovery System.
If there is no valve to attach the recovery
system, install one (such as a WATCO A-1)
before venting the Freon
system, install one (such as a WATCO A-1)
before venting the Freon
TM
. Leave the valve in
place after servicing the system.
CAUTION
—17—
— Replacement of the refrigeration cycle.
1. When replacing the refrigeration cycle, be sure to
Discharge the refrigerant system using a Freon
TM
recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the Freon
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the Freon
TM
. Leave the valve in place after
servicing the system.
2. After discharging the unit completely, remove the
desired component, and unbraze the pinch-off
tubes.
tubes.
3. Solder service valves into the pinch-off tube ports,
leaving the valves open.
4. Solder the pinch-off tubes with Service valves.
5. Evacuate as follows.
5. Evacuate as follows.
1) Connect the vacuum pump, as illustrated figure
17A.
2) Start the vacuum pump, slowly open manifold
valves A and B with two full turns
counterclockwise and leave the valves open.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold
counterclockwise and leave the valves open.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold
and entire system.
3) Operate the vacuum pump for 20 to 30 minutes,
until 600 microns of vaccum is obtained. Close
valves A and B, and observe vacuum gauge for
a few minutes. A rise in pressure would
indicate a possible leak or moisture remaining in
the system. With valves A and B closed, stop
valves A and B, and observe vacuum gauge for
a few minutes. A rise in pressure would
indicate a possible leak or moisture remaining in
the system. With valves A and B closed, stop
the vacuum pump.
4) Remove the hose from the vacuum pump and
place it on the charging cylinder. See figure
18B.
Open valve C.
Discharge the line at the manifold connection.
18B.
Open valve C.
Discharge the line at the manifold connection.
5) The system is now ready for final charging.
6. Recharge as follows :
1) Refrigeration cycle systems are charged from
the High-side. If the total charge cannot be put
in the High-side, the balance will be put in the
suction line through the access valve which you
installed as the system was opened.
in the High-side, the balance will be put in the
suction line through the access valve which you
installed as the system was opened.
2) Connect the charging cylinder as shown in figure
17B.
With valve C open, discharge the hose at the
manifold connection.
With valve C open, discharge the hose at the
manifold connection.
3) Open valve A and allow the proper charge to
enter the system. Valve B is still closed.
4) If more charge is required, the high-side will not
take it. Close valve A.
5) With the unit running, open valve B and add the
balance of the charge.
a. Do not add the liquid refrigerant to the Low-
a. Do not add the liquid refrigerant to the Low-
side.
b. Watch the Low-side gauge; allow pressure to
rise to 30 lbs.
c. Turn off valve B and allow pressure to drop.
d. Repeat steps b. and c. until the balance of the
d. Repeat steps b. and c. until the balance of the
charge is in the system.
6) When satisfied the unit is operating correctly,
use the pinch-off tool with the unit still running
and clamp on to the pinch-off tube. Using a tube
cutter, cut the pinch-off tube about 2 inches from
the pinch-off tool. Use sil-fos solder and solder
pinch-off tube closed. Turn off the unit, allow it to
set for a while, and then test the leakage of the
pinch-off connection.
and clamp on to the pinch-off tube. Using a tube
cutter, cut the pinch-off tube about 2 inches from
the pinch-off tool. Use sil-fos solder and solder
pinch-off tube closed. Turn off the unit, allow it to
set for a while, and then test the leakage of the
pinch-off connection.
NOTES
If high vacuum equipment is used, just crack
valves A and B for a few minutes, then open
slowly with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.
valves A and B for a few minutes, then open
slowly with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.
2.4.3 CAPILLARY TUBE
1. Remove the cabinet. (Refer to section 2.1.2)
2. After discharging the refrigerant completely,
2. After discharging the refrigerant completely,
unbraze the interconnecting tube at the capillary
tube.(See caution above)
tube.(See caution above)
3. Remove the capillary tube.
4. Re-install the component by referring to notes.
4. Re-install the component by referring to notes.
CAUTION
—18—
Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable
of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve.
of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve.
A
COMPOUND GAUGE
EVAPORATOR
(LOW PRESSURE SIDE)
(LOW PRESSURE SIDE)
COMPRESSOR
CAPILLARY TUBE
CONDENSER
(HIGH PRESSURE SIDE)
(HIGH PRESSURE SIDE)
SEE INSETS
BELOW
MANIFOLD
GAUGE
B
Figure 17A-Pulling Vacuum
Figure 17B-Charging
A
B
EXTERNAL
VACUUM PUMP
VACUUM PUMP
A
CHARGING
CYLINDER
CYLINDER
LOW
HI
B
C
—19—
3. INSTALLATION
3.1 SELECT THE BEST LOCATION
1.To prevent vibration and noise, make sure the unit
in installed securely and firmly.
2.Install the unit where the sunlight does not shine
directly on the unit.
3.There should be no obstacle, such as a
fence or wall, within 50cm from the back of the
cabinet because it will prevent heat radiation of the
condenser.
Restriction of outside air will greatly reduce the
cooling efficiency of the air conditioner.
cabinet because it will prevent heat radiation of the
condenser.
Restriction of outside air will greatly reduce the
cooling efficiency of the air conditioner.
4.Install the unit a little obliquely outward not to leak
the condensed water into the room (about 10 ~
15mm or 1/4 bubble with level).
15mm or 1/4 bubble with level).
5.Install the unit with the bottom about 70 ~ 150cm
above the floor level.
3.2 CHECK OF INSTALLATION
The setting conditions must be checked prior to
initial starting.
The undermentioned items are especially important
checking points when the installation is finished.
initial starting.
The undermentioned items are especially important
checking points when the installation is finished.
1. Grounding wire (Green or Green and Yellow) is
provided in the power cord. The green wire must
be grounded.
be grounded.
2. Connect to a single-outlet 15AMP circuit.
3. To avoid vibration or noise, make sure the air
3. To avoid vibration or noise, make sure the air
conditioner is installed securely.
4 Avoid placing furniture or draperies in front of the
air inlet and outlet.
The air conditioner must be installed level or tilted
slightly to the outside for proper water drainage.
On exceptionally hot and humid days the air
conditioner may drain condensation through
overflow.
If the air conditioner is used in hot and a high
slightly to the outside for proper water drainage.
On exceptionally hot and humid days the air
conditioner may drain condensation through
overflow.
If the air conditioner is used in hot and a high
humidity zone, exchange the
HOLE RUBBER
for the
DRAIN PIPE.(See figure 19, figure 20.)
All side louvers of the cabinet must remain
exposed to the outside of the structure.
exposed to the outside of the structure.
10~15mm
Over 50cm
HEAT
RADIATION
FENCE
AWNING
FOAM
COOLED
AIR
70-150cm
BASE PAN
HOLE RUBBER
DRAIN PIPE
1
BOTTOM
2
BASE PAN
BOTTOM
Figure 19
Figure 20
Figure 18
CAUTION
3.3. HOW TO DRAIN (When using drain pipe)
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