LG LV-B1861CL / LV-B1861HL / LV-B1864CL / LV-B1864HL / LV-B2461CL / LV-B2461HL / LV-B2464CL / LV-B2464HL Service Manual ▷ View online
–37–
7. Air Purging of the Pipes and Indoor Unit
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the compressor.
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service port by the
charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below -76cmHg.
5. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon wrench.
6. Tighten the valve stem nuts of the 2-way valve and 3-way valve.
7. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque: 1.8kg.m)
Indoor unit
Outdoor unit
Liquid side
CLOSE
OPEN
Vaccum pump
Gas side
Closed
Closed
2-way valve/
3-way valve
3-way
valve
–38–
8. Test running
R
Thermometer
2) Evaluation of the performance
1. Measure the temperature of the intake and dis-
charge air.
2. Ensure the difference between the intake temper-
ature and the discharge one is more than 8°C
(Cooling) or reversely (Heating).
(Cooling) or reversely (Heating).
3) Selection of the slide switch according
to installation method
1. In case the indoor unit is installed on the floor,
please change the side switch which is on the
Main PCB Assembly to the 'BOTTOM' state.
Main PCB Assembly to the 'BOTTOM' state.
2. In case the indoor unit is installed under the ceil-
ing, please change the slide switch which is on
the Main PCB Assembly to the ' CEILING' state.
the Main PCB Assembly to the ' CEILING' state.
The initial state of the slide switch is set for
the bottom installation.
the bottom installation.
1) 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. Prepare the remote control.
• Insert two batteries provided.
Remove the battery cover from the remote con-
troller.
troller.
• Slide the cover according to the arrow direction.
Insert the two batteries.
(Two "R03" or "AAA" dry-cell batteries or equiva-
lent.)
(Two "R03" or "AAA" dry-cell batteries or equiva-
lent.)
• Be sure that the (+) and (-) directions are cor-
rect.
• Be sure that both batteries are new.
Re-attach the cover.
• Slide it back into position.
3. Operate the unit for fifteen minutes or more.
–23–
2. Indoor unit installation
■
Before Installing, prepare Installation Plates
• 'Installation Plates' are attached at the bottom of
indoor unit.
Detach them by removing each 3 screws at both
sides.
Detach them by removing each 3 screws at both
sides.
• Detach 'Side Plate (R,L)' by removing each 2 screws
on both sides.
• Pull the upper right and left side of 'Inlet Grille' to the
front, and it will stop at slightly tilted position.
• Unhook the 'Inlet hanger' from the 'Hanger screw' on
the both left and right side.
• Detach the 'Inlet Grille' from the Indoor Unit.
1) Installation on the ceiling
• Measure and mark the position for the Suspen-
sion bolts and the piping hole.
• Drill the hole for anchor nut on the ceiling.
Before secure the Installation Plates, select the bent
direction of the Installion Plate to the inside or the
outside according to the installation circumstances.
direction of the Installion Plate to the inside or the
outside according to the installation circumstances.
• Drill the piping hole on the wall slightly tilted to the
outdoor side using a ø70 hole-core drill.
R
1076
Suspension
bolt
Center-line for the
piping hole
265
1236
265
Install Plate
1)
2)
R
5~7mm
Indoor
Outdoor
WALL
Side Plate
Inlet Grille
Inlet hanger
Hanger
screw
–24–
• Insert the nuts and washer onto the suspension bolts
for locking the suspension bolts on the ceiling.
• Mount the suspension bolts to the anchor-nuts firmly.
• Secure the Installation plates onto the Suspension
• Secure the Installation plates onto the Suspension
bolts (adjust level roughly.) using nuts, washers and
spring washers.
spring washers.
• Engage 2 hooks on the both left and right side
of the unit to the lower slot of Installation Plates.
• Adjust a level with a level gauge on the direction
of left-right, back-forth by adjusting suspension
bolts.
• Move the hooks on the unit to the upper slot of
Installation Plates. Then the unit will be declined
to the bottomside so as to drain well.
Washer
Nut
Suspension
bolts
Ceiling
Anchor nut
Suspension
bolts
Spring
washer
washer
max.
12mm
Washer
Nut
1)
2)
Suspension
bolt
Installation plate
Adjust a level
R
Level gauge
Lower slot
R
R
Upper slot
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