LG MULTI V B1 Series User manual

System
Heat Pump Indoor Unit
INSTALLATION MANUAL
LG
MODELS: B1/B2 Series
Type: Ceiling Concealed Duct - Low Static
IMPORTANT
• Please read this installation manual completely before
installing the product.
• Installation work must be performed in accordance with
the national wiring standards by authorized personnel
only.
• Please retain this installation manual for future reference
after reading it thoroughly.
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

2Indoor Unit
Ceiling Concealed Duct - Low Static Type Indoor Unit Installation Manual
TABLE OF CONTENTS
❏Four type "A" screws
❏Connecting cable
❏Pipes: Gas side
Liquid side
(Refer to Product Data)
❏Insulation materials
❏Additional drain pipe
❏Level gauge
❏Screw driver
❏Electric drill
❏Hole core drill
❏Flaring tool set
❏Specified torque wrenches
(different depending on model No.)
❏Spanner.......Half union
❏A glass of water
❏Screw driver
❏Hexagonal wrench
❏Gas-leak detector
❏Vacuum pump
❏Gauge manifold
❏Owner's manual
❏Thermometer
Safety Precautions.................3
Introduction.............................6
Installation
Selection of the best location
................................................7
Ceiling opening dimension
and hanging bolt location......8
Indoor Unit Installation...........9
Wiring Connection.................9
Part name and functions.....10
Checking the Drainage........11
Two Thermistor system.......16
E.S.P.(External Static
Pressure) Setting.................17
How to Set E.S.P?...............18
Installation Requirements Required Parts Required Tools

Installation Manual 3
ENGLISH
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■Be sure to read before installing the air conditioner.
■Be sure to observe the cautions specified here as they include important items related to safety.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the
following indications.
■Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
■Installation
Do not use a defective or under-
rated circuit breaker. Use this
appliance on a dedicated circuit.
• There is risk of fire or electric shock.
For electrical work, contact the
dealer, seller, a qualified electri-
cian, or an Authorized Service
Center.
• Do not disassemble or repair the
product. There is risk of fire or elec-
tric shock.
Always ground the product.
• There is risk of fire or electric shock.
Install the panel and the cover
of control box securely.
• There is risk of fire or electric shock.
Always install a dedicated cir-
cuit and breaker.
• Improper wiring or installation may
cause fire or electric shock.
Use the correctly rated breaker
or fuse.
• There is risk of fire or electric shock.

4Indoor Unit
Safety Precautions
■Operation
Do not modify or extend the
power cable.
• There is risk of fire or electric shock.
Do not let the air conditioner
run for a long time when the
humidity is very high and a door
or a window is left open.
• Moisture may condense and wet or
damage furniture.
Be cautious when unpacking
and installing the product.
• Sharp edges could cause injury. Be
especially careful of the case edges
and the fins on the condenser and
evaporator.
For installation, always contact
the dealer or an Authorized
Service Center.
• There is risk of fire, electric shock,
explosion, or injury.
Do not install the product on a
defective installation stand.
• It may cause injury, accident, or
damage to the product.
Be sure the installation area
does not deteriorate with age.
• If the base collapses, the air condi-
tioner could fall with it, causing prop-
erty damage, product failure, and
personal injury.
Do not store or use flammable gas or combustibles near the product.
• There is risk of fire or failure of product.
Gasolin

Installation Manual 5
ENGLISH
Safety Precautions
Always check for gas (refriger-
ant) leakage after installation or
repair of product.
• Low refrigerant levels may cause
failure of product.
Install the drain hose to ensure
that water is drained away prop-
erly.
• A bad connection may cause water
leakage.
Keep level even when installing
the product.
• To avoid vibration or water leakage.
Do not install the product where
the noise or hot air from the out-
door unit could damage the
neighborhoods.
• It may cause a problem for your
neighbors.
Use two or more people to lift
and transport the product.
• Avoid personal injury.
Do not install the product where
it will be exposed to sea wind
(salt spray) directly.
• It may cause corrosion on the product.
Corrosion, particularly on the con-
denser and evaporator fins, could
cause product malfunction or inefficient
operation.
90˚
■Installation

6Indoor Unit
Introduction
Introduction
Air outlet vents
Air filters
Remote Controller
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Symbols Used in this Manual
Features
B1/B2 Series : Low static Duct type

Installation Manual 7
ENGLISH
Installation
Installation
Indoor unit
Install the air conditioner in the location that satisfies the fol-
lowing conditions.
•The place shall easily bear a load exceeding four times the
indoor unit’s weight.
•The place shall be able to inspect the unit as the figure.
•The place where the unit shall be leveled.
•The place shall easily connect with the outdoor unit.
•The place where the unit is not affected by an electrical
noise.
•The place where air circulation in the room will be good .
•There should not be any heat source or steam near the
unit
Confirm the positional relationship between the unit and
suspension bolts.
•Installation the ceiling opening to clean the filter or service
under the product.
Selection of the best location
Inspection hole
(600 x 600)
Control box
H=20 or more
•Suitable dimension "H" is necessary to get a slooe
to drain as aiven in the fiaure
Side view (unit: mm)
600600
A(Min) B(Min)
Ceiling
Service Space
A
B
Model A B
7/9/12k 600 900
18/24k 600 1100
(Length: mm)
B1/B2 Series : Low static Duct type

8Indoor Unit8Indoor Unit
Installation
Ceiling dimension and hanging bolt location
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.
CASE 1
POSITION OF SUSPENSION BOLT
(Unit:mm)
7/9/12k BTU/h 850 900 383 575 93 190 21 795 163 820
18/24k BTU/h 1130 1180 383 575 93 190 21 1065 163 1100
Dimension
Capacity
ABCDEFGHI J
CE
G
D
A
J
B
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
I
F
H
Drainage hole Drain Pump use
CASE 2
POSITION OF CONSOLE BOLT

Installation Manual 9
ENGLISH
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 suspen- sion bolts for locking the suspension bolts on the
ceiling.
• Mount the suspension bolts to the set anchor firmly.
•Secure the installation plates onto the suspension
bolts (adjust level roughly) using nuts, washers
and spring washers.
1 Set anchor
Old building New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
bolts
Connect the wires to the terminals on the control board individually according to the outdoor unit connection.
•Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively.
Terminal Block Indoor
1(L) 2(N) 3 4
INDOOR POWER INPUT
Indoor
unit Outdoor unit Central
controller
AB E F C D Vcc GND
Main
outdoor unit
Wiring Connection
Indoor Unit Installation
CAUTION : Tighten the nut and bolt
to prevent unit falling.
WARNING : Make sure that the screws of the terminal are free from looseness.
B1/B2 Series

10 Indoor Unit10 Indoor Unit
Installation
•Low static duct type in case of suction from back
side. •Low static duct type in case of suction from bottom side.
Air Filter
Air outlet Panel Rear Air outlet Air Filter
Panel Rear
Part name and functions