LG LB-D1861HL_HP / LB-D1861CL_CP / LB-D2461HL_HP / LB-D2461CL_CP Service Manual ▷ View online
–34–
Optional Operation
1) Two Thermistor System
(1) Open the rear cover of the wired remote-controller to set the mode.
(2) Select one of three selectable modes as follows.
(2) Select one of three selectable modes as follows.
• Position 1:
The room temperature is controlled by the thermistor of the main body.
• Position 2:
The room themperature is controlled by the thermistor of the wired remote-controller, control the
temperature according to the position of wired remote-controller.
temperature according to the position of wired remote-controller.
• Position 3:
The room temperature is controlled by lower temperature between the temperature of main body and of
remote-controller sensor.
remote-controller sensor.
(3) Move the slide switch to set position.
(4) Close the rear cover and check if it works normally.
TH
R14H
SW TH
REMO
MAIN
2TH
OP7
R18H
R17H
OP6
LO
STAND
SW
HIGH
HI
R03S
C070
R04S
R02S
R01S
OP3
OP2
OP1
R19H
R11H
R13H
R12H
OP5R16H
OP4
R15H
CO1H
REMO
Room Temp. sensor
2TH
MAIN
Position 2
Position 1
Position 3
Position 3
Slide switch for 2 Thermistor
• Select the position after counselling with a customer.
• In case of cooling mode, room temperature is controlled by the main body sensor.
• To control the room temperature by a wired remote controller, install controller(room temp. sensor) to sense
• In case of cooling mode, room temperature is controlled by the main body sensor.
• To control the room temperature by a wired remote controller, install controller(room temp. sensor) to sense
the temperature more accurately.
• Maunfactured in the position 1.
CAUTION
–35–
2) Group Control(Optional Wiring)
• You can use a group control operation after connecting the brown and yellow wire of each air-conditioner.
• Remove the resistor "OP 7" in remote controller.
• It operates maximum 16 Units by only one Wired Remote Controller,
• Remove the resistor "OP 7" in remote controller.
• It operates maximum 16 Units by only one Wired Remote Controller,
and each Unit starts sequentially to prevent overcurrent.
Wiring design
Features
• Use Only One Wired Remote Controller with several air conditioners(max. 16 Units)
• Random starting to prevent overcurrent.
• Random starting to prevent overcurrent.
Operation unit
ZONE
1 2 3 4
Humidify
JET
AUTO
AUTO SWING
OPERATION
FAN SPEED
Program set
SUB FUNCTION
SET TEMP
Room Temp
HI
MED
LO
MED
LO
Heater
Defrost
Filter
Defrost
Filter
Preheat
Out door
Time
Timer
On
Set no. Time
On
Set no. Time
Off
01
03
05
07
09
11
13
15
17
19
21
23
Indoor Unit 1
Terminal(Local Supply)
Block
Block
Terminal(Local Supply)
Block
Block
Terminal(Local Supply)
Block
Block
Main PCB
#1
Main PCB
#2
Main PCB
#16
Wired Remote Controller
Slide Switch
OP7
Remote
Controller
PCB
Indoor Unit 2
Main PCB
Indoor Unit 16
Connector
RED(12V)
YL(SIGNAL)
BR(GND)
RED(12V)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Connecting Cable(Local Supply)
Connector
Connector
....
....
• Be careful not to exchange the color of wires.
• The maximum length of connecting wire should be below 200m(25
• The maximum length of connecting wire should be below 200m(25
Ω
) on connecting each units.
• Use a wire more than 0.5mm
2
CAUTION
2. Ceiling dimension and hanging
bolt location
■
Installation of Unit
Install the unit above the ceiling correctly.
Install the unit above the ceiling correctly.
• Apply a joint-canvas between the unit and duct to
absorb unnecessary vibration.
• Apply a filter Accessory at air return hole.
• Install the unit leaning to a drainage hole side as a
figure for easy water drainage.
• A place where the unit will be leveled and that can
support the weight of the unit.
• A place where the unit can withstand its vibration.
• A place where service can be easily performed.
• A place where service can be easily performed.
–23–
CASE 1
POSITION OF SUSPENSION BOLT
CASE 2
POSITION OF CONSOLE BOLT
(Unit:mm)
Drainage hole
M10 Nut
M10 SP. washer
M10 washer
X 4
X 4
(Local
supply)
supply)
X 4
M10 Nut
M10 SP. washer
M10 washer
X 4
X 4
(Local
supply)
supply)
X 4
A
B
C
1-3 mm
D
(G)
H
I
E
F
A
B
C
D
E
F
(G)
H
I
18K BTU/h 942 880 466
54
575
30
87
750 186
24K BTU/h 942 880 466
54
575
30
87
750 186
30K BTU/h 1242 1180 492
54
600
30
87
830 186
1072 1010 492
54
600
30
87
750 186
1242 1180 492
54
600
30
87
830 186
1242 1180 492
54
600
30
87
830 186
1292 1230 650.5 54
760
30
120 1006 294
1292 1230 570.5 54
680
30
120 1006 294
1292 1230 650.5 54
760
30
120 1006 294
1292 1230 570.5 54
680
30
120 1006 294
Dimension
Capacity
36K BTU/h
(LB-C36)
36K BTU/h
(LB-F36)
42K BTU/h
48K BTU/h
(LB-B48)
60K BTU/h
(LB-B60)
48K BTU/h
(LB-E48)
60K BTU/h
(LB-E60)
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
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 capacity so that it draws oily
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 suspension 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. 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.
–24–
3. The Indoor Unit Installation
• Select and mark the position for fixing bolts.
• Drill the hole for set anchor on the face of ceiling.
• Drill the hole for set anchor on the face of ceiling.
• Insert the set anchor and washer onto the suspen-
sion bolts for locking the suspension bolts on the ceil-
ing.
ing.
• Mount the suspension bolts to the set anchor 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.
4. Remote Controller Installation
• Although the room temperature sensor is in the indoor unit, the remote controller should be installed
in such places away from direct sunlight and high humidity.
Installation of the remote controller
• Select places that are not splashed with water.
• Select control position after receiving customer approval.
• The room temperature sensor is built in the indoor unit.
• This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult
• Select places that are not splashed with water.
• Select control position after receiving customer approval.
• The room temperature sensor is built in the indoor unit.
• This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult
to see.(The standard height is 1.2 ~ 1.5m high)
Routing of the remote controller cord
• Keep the remote controller cord away from the refrigerant piping and the drain piping.
• To protect the remote controller cord from electrical noise, place the cord at least 5cm away from other power
• Keep the remote controller cord away from the refrigerant piping and the drain piping.
• To protect the remote controller cord from electrical noise, place the cord at least 5cm away from other power
cables (audio equipment, television set, etc.)
• If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water
droplets from running.
Tighten the nut and bolt to prevent unit falling.
CAUTION
1 Set anchor
Old building
New building
2 Plate washer
3 Spring washer
3 Spring washer
4 Nut
5 Suspension
bolts
bolts
• Local supply
➀
Set anchor
➁
Plate washer
- M10
➂
Spring washer
- M10
➃
Nut
- W3/8 or M10
➄
Suspension bolt
- W3/8 or M10
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