DOWNLOAD LG LB-F4280HL / LB-F4280CL Service Manual ↓ Size: 916.15 KB | Pages: 42 in PDF or view online for FREE

Model
LB-F4280HL LB-F4280CL
Pages
42
Size
916.15 KB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lb-f4280hl-lb-f4280cl.zip
Date

LG LB-F4280HL / LB-F4280CL Service Manual ▷ View online

–15–
Indoor unit
Outdoor unit
B
A
• If 42K Model is installed at a distance of 15m, 700g of refrigerant
should be added (15-5) x 70g = 700g.
• Capacity is based on standard length and maximun allowance
length is on the basis of reliability.
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 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 capac-
ity 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 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.
3) Piping length and the elevation
MODEL
42K BTU
3/4"
3/8"
5
40
Gas
Liquid
5
25
70
Elevation B(m)
Length A(m)
* Additional
refrigerant
(g/m)
Pipe Size 
(Diameter: Ø)
Standard
Standard
Max.
Max.
Installation of Unit
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.
–16–
Drainage hole
M10 Nut
M10 SP. washer 
M10 washer 
X 4
X 4
(Local
supply)
X 4
M10 Nut
M10 SP. washer 
M10 washer 
X 4
X 4
(Local
supply)
X 4
A
B
C
1-3mm
D
(G)
H
I
E
F
CASE 1
POSITION OF SUSPENSION BOLT
CASE 2
POSITION OF CONSOLE BOLT
A
B
C
D
E
F
(G) H
I
42K BTU
1242 1180 492 54
600
30
87 830 186
(Unit:mm)
Dimension
Capacity
2. Ceiling dimensions and hanging bolt location
3. The Indoor Unit Installation
• Select and mark the position for fixing bolts.
• Drill the hole for set anchor on the face of ceiling.
• Insert the set anchor and washer onto the sus-
pension bolts for locking the suspension bolts on
the ceiling.
• Mount the suspension bolts to the set anchor
firmly.
• Secure the installation plates onto the suspen-
sion bolts (adjust level roughly) using nuts, wash-
ers and spring washers.
–17–
1 Set anchor
Old building
New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
   bolts
Tighten the nut and bolt to prevent unit falling.
CAUTION
• Local supply
➀ 
Set anchor
Plate washer 
- M10
Spring washer
- M10
Nut 
- W3/8 or M10
Suspension bolt
- W3/8 or M10
–18–
• Fix the under plate on the wall
• Separate the under plate from Remote control box.
• Fix the cord clamps on the wall by
Ø 3 tapping screws (accessory).
• Fix the remote control cord.
Remote control 
box body
Cord clamp
(accessory)
Lever carefully 
the box open 
using a screw 
driver, etc.
Front case
The lower part
Face of wall
Under plate
Screw (accessory)
4. Remote Controller Installation
• Although the room temperature sensor is in the indoor unit, the remote control box should be
installed in such places away from direct sunlight and high humidity.
Installation of the remote control box
• Select places that are not splashed with water.
• Select control position after receiving customer approval.
• The room temperature sensor of the thermostat for temperature control 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 control cord
• Keep the remote control cord away from the refrigerant piping and the drain piping.
• To protect the remote control cord from electrical noise, place the cord at least 5cm away from other power
cables (audio equipment, television set, etc.)
• If the remote control cord is secured to a wall, provide a trap at the top of the cord to prevent water droplets
from running.
REMOTE CONTROL BOX INSTALLATION
DISASSEMBLING
ELECTRICAL WIRING
 
Wire and make sure that teminal
numbers are matched on unit side and
remote controller side.
The maximum length of the cord is 100m.
If the length of the cord exceeds 50m,
use a wire size greater than 0.5mm
2
.
Remote controller
 Yellow, Red, Brown  
(Main board)
CN REMO
Page of 42
Display

Click on the first or last page to see other LB-F4280HL / LB-F4280CL service manuals if exist.