LG LM-1860HL Service Manual ▷ View online
- 31 -
ø7mm
The connecting cable, from the indoor unit to the
outdoor unit should be complied with the following
specification.(Rubber insulation, type H05RN-F
approved by TUV or VDE)
outdoor unit should be complied with the following
specification.(Rubber insulation, type H05RN-F
approved by TUV or VDE)
NORMAL
CROSS-SECTIONAL
ARE 0.75mm
CROSS-SECTIONAL
ARE 0.75mm
2
(Heat Pump Model Only)
2) Connect the cable to the indoor unit
1. Connect the wires to the terminals on the control
board individually according to the outdoor unit
connection.
connection.
• Ensure that the color of wires of outdoor unit and
the terminal No. are the same to the indoor's
respectively.
respectively.
1) Cooling only type
2) Cooling & Heating type
• Secure the cable onto the control board with the
holder (clamper).
2. Attach the Grille onto the cabinet.
• Grasp the lower left and right side of the grille
and engage two tabs on the top inside edge of
the grille with two slots on the cabinet's top front
edge.
the grille with two slots on the cabinet's top front
edge.
• Press the Grille toward to the cabinet until it will
be back into place.
Terminals on the OUTDOOR UNIT
Terminals on the INDOOR UNIT
4
3
POWER CORD
2(N)
1(L)
2(N)
1(L)
4
3
2(N)
3
1(L)
2(N)
1(L)
4
3
2(N)
1(L)
A-UNIT
Terminals on the INDOOR UNIT
B-UNIT
Terminals on the OUTDOOR UNIT
Terminals on the INDOOR UNIT
Terminals on the INDOOR UNIT
5
5
4
3
4
3
5
4
3
2(N)
2(N)
1(L)
1(L)
POWER CORD
2(N)
1(L)
5
4
3
2(N)
1(L)
R. V/ V
R. V/ V
FAN
FAN
COMP.
COMP.
A-UNIT
B-UNIT
Connecting
cable
cable
- 32 -
2) Form the pipings
1. Wrap the connecting portion of indoor unit
with the Insulation material and secure it with
two Plastic Bands(for the right pipings).
two 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 down to up.
3. Form the pipings gathered by taping along the
exterior wall and fix it onto the wall by saddle
or equivalent.
or equivalent.
1. Tape the Pipings and Connectiong cable from
down to up.
2. Form the pipings gathered by taping along the
exterior wall, make the Trap to be required to
prevent the room from entering the water.
prevent the room from entering the water.
3. Fix the pipings onto the wall by saddle or
equivalent.
In case of the Outdoor unit is installed bellow
position of the Indoor unit.
position of the Indoor unit.
In case of the Outdoor unit to be installed
upper position of the Indoor unit.
upper position of the Indoor unit.
Taping
Pipings
Connecting
cable
Plastic
band
band
•
Trap is required to prevent the electrical part
from entering the water.
from entering the water.
Seal a small opening
around the pipings
with gum type sealer.
around the pipings
with gum type sealer.
Trap
Trap
Drain hose
- 33 -
5. Air Purging of the Pipings and indoor unit
1) Air purging
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the
compressor.
compressor.
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. Connect the charge set and a gas cylinder to the service port of the liquid side valve.
Leave the valve on the gas cylinder closed.
3. Check for gas leakage.
Open the valves on the gas cylinder and the change set wait, 10 seconds, and then set it closed position.
Check the flare connections for gas leakage.
4. Air purping
Open the valves on the gas cylinder and the charge set.
Using the Hexagonal wrench to press the gas side valve's core pin, discharge for three seconds and then
wait for one minute. Repeat this three times.
Using the Hexagonal wrench to press the gas side valve's core pin, discharge for three seconds and then
wait for one minute. Repeat this three times.
5. Discharge the refrigerant.
Close the valve on the gas cylinder and discharge the refrigerant until the gauge indicates 0.5 to
1kg/cm
2
.G.
6. Disconnect the charge set and the gas cylinder, and set the liquid side and gas side valves to the open
position.
Be sure to use a hexagonal wrench to operate the valve stems.
7. Set the both liquid and gas side valves to open position with the Hexagonal wrench for the unit opera-
tion.
Caution
If gas leakage are discovered in step 3 above, take the following measures:
If the gas leaks stop when the piping connections are tightened further, continue working from step 4.
If the gas leaks do not stop when the connections are retightened, repair the location of the leak, discharge
all of the gas through the service port, and then recharge with the specified amount of gas from a gas
cylinder.
If the gas leaks do not stop when the connections are retightened, repair the location of the leak, discharge
all of the gas through the service port, and then recharge with the specified amount of gas from a gas
cylinder.
8. Cheacking a gas leakage
(1) Connect the manifold gauge to the service port of 3-way valve.
Measure the pressure.
(2) Keep it for 5-10 minutes.
Ensure if the pressure indicated on the gauge is as same as that of measured at first time.
9. Mount the valve stem nuts and the service port nut.
Use torque wrench to tighten the service port nut to a torque of 1.8kg.m.
Be sure to check for gas leakage.
Be sure to check for gas leakage.
10. Apply steps from 1 to 9 to each unit (A-unit, B-unit) by the same method.
NOTE:
Remember that outdoor unit does not contain refrigerant for air purge.
When you purge the air you should charge your refrigerant (or purchased) by use of the gas cylinder and
charge set.
If the flare connections have not been done correctly and there gas leaks, a gas cylinder and the charge
set will be needed.
Remember that outdoor unit does not contain refrigerant for air purge.
When you purge the air you should charge your refrigerant (or purchased) by use of the gas cylinder and
charge set.
If the flare connections have not been done correctly and there gas leaks, a gas cylinder and the charge
set will be needed.
- 34 -
R22
OPEN
CLOSE
Liquid side
Indoor unit
Gas side
Closed
Closed
Outdoor unit
GAS
CYLINDER
CYLINDER
Click on the first or last page to see other LM-1860HL service manuals if exist.