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Multi V, Multi F, and Single Zone Cassette Indoor Units Install Tips

The following pages present an overview of installation of LG’s Multi V, Multi F, and Single Zone cassette indoor 

units, and is intended to supplement the technical and installation information provided through

 www.lghvac.com

The review of basic operation and maintenance skills must reinforce industry established practices and provide 

helpful tips to make equipment operation successful.

This installation guide is NOT intended to be a replacement for LG installation manuals, nor is it intended to cover ALL the logistics of installing LG 

cassette indoor units. For detailed information on the procedures mentioned here, refer to the installation manual specific to your product. Always 

comply with applicable local, state, and federal codes. 

Safety Instructions - Wiring

An authorized, trained technician licensed 

locally and at the state level must install the 

unit.

Improper installation by the user may result in 

fire, explosion, electric shock, physical injury or 

death.
Wear protective gloves when handling equip-

ment. Sharp edges may cause personal injury.
Always check for system refrigerant leaks 

after the unit has been installed or serviced.

Exposure to high concentration levels of refrig-

erant gas may lead to illness or death. 

Dispose the packing materials safely.

Packing materials, such as nails and other 

metal or wooden parts, may cause puncture 

wounds or other injuries. Tear apart and throw 

away plastic packaging bags so that children 

may not play with them and risk suffocation 

and death.
Install the unit considering the potential for  

earthquakes.

Improper installation may cause the unit to fall 

over, resulting in physical injury or death. 

Install the unit in a safe location where 

nobody can step on or fall onto it.  Do not 

install the unit on a defective mounting.

It may result in an accident that causes physical 

injury or death.
Properly insulate all cold surfaces to prevent 

“sweating.” 

Cold surfaces such as uninsulated piping can 

generate condensate that could drip, causing a 

slippery surface that creates a risk of slipping, 

falling, and personal injury.

Do not store or use flammable gas or combusti-

bles near the unit.

There is risk of fire, explosion, and physical injury or 

death.

WARNING

DANGER

CAUTION

Be very careful when transporting the product. There is a risk of the product falling and 

causing physical injury.

Use appropriate moving equipment to transport each frame; ensure the equipment is capa-

ble of supporting the weight of the equipment.

Properly insulate all cold surfaces to prevent 

“sweating.” 

Cold surfaces such as uninsulated piping can 

generate condensate that may drip and cause 

a slippery surface condition and / or water 

damage to interior surfaces.
Always check for system refrigerant leaks 

after the unit has been installed.

Low levels may cause product failure.

Do not make refrigerant substitutions. Use 

R-410A only.

If a different refrigerant is used, or air mixes 

with original refrigerant, the unit will malfunc-

tion and be damaged.
Keep the unit upright during installation to 

avoid vibration or water leakage. 
When connecting refrigerant tubing, remem-

ber to allow for pipe expansion.

Improper piping may cause refrigerant leaks 

and system malfunction.

Do not install the unit in a noise-sensitive 

area. Periodically check that the frame is not 

damaged. 
There is a risk of equipment damage.

Install the unit in a safe location where 

nobody can step on or fall onto it.  Do not 

install the unit on a defective stand.

There is a risk of unit and property damage.
Install the drain hose to ensure adequate 

drainage.

There is a risk of water leakage and property 

damage.

Do not store or use flammable gas /  

combustibles near the unit.

There is a risk of product failure.

Do not use this equipment in mission crit-

ical or special-purpose applications such as 

preserving foods, works of art, wine coolers 

or refrigeration. This equipment is designed to 

provide comfort cooling and heating.

Do not place IDUs in an environment where 

the IDUs may be exposed to harmful volatile 

organic compounds (VOCs), or in environ-

ments where there is improper air make up 

or supply or inadequate ventilation. If there 

are concerns about VOCs in the environment 

where the IDUs are installed, proper air make 

up or supply and/or adequate ventilation 

should be provided.  Additionally, in buildings 

where IDUs will be exposed to VOCs, consider 

a third party factory-applied epoxy coating to 

the fan coils for each IDU where the entire coil 

is dipped, not sprayed.

Do not supply power to the unit until all electrical wiring, controls wiring, piping, installation, and refrigerant system evacuation are completed.

The information contained in this manual is 

intended for use by an industry-qualified, 

experienced, certified electrician familiar with 

the NEC who is equipped with the proper 

tools and test instruments.

Failure to carefully read and follow all instruc-

tions in this manual can result in equipment 

malfunction, property damage, personal injury 

or death.
Refer to local, state, and federal codes, and 

use power wires of sufficient current capacity 

and rating.

Wires that are too small may generate heat 

and cause a fire.

All electric work must be performed by a 

licensed electrician and conform to local build-

ing codes or, in the absence of local codes, 

with the NEC, and the instructions given in 

this manual. 

If the power source capacity is inadequate or 

the electric work is not performed properly, it 

may result in fire, electric shock, physical injury 

or death.
Secure all field wiring connections with appro-

priate wire strain relief.

Improperly securing wires will create undue 

stress on equipment power lugs. Inadequate 

connections may generate heat, cause a fire 

and physical injury or death.

Properly tighten all power lugs. 

Loose wiring may overheat at connection 

points, causing a fire, physical injury or death.

Do not change the settings of the protec-

tion devices.

If the pressure switch, thermal switch, or other 

protection devices are  bypassed or forced to 

work improperly, or parts other than those 

specified by LG are used, there is risk of fire, 

electric shock, explosion, and physical injury or 

death.

High voltage electricity is required to operate 

this system. Adhere to the U.S. National 

Electric Code (NEC) and these instructions 

when wiring. 

Improper connections and inadequate ground-

ing can cause accidental injury or death.

Always ground the unit following local, state, 

and NEC codes.

There is risk of fire, electric shock, and physical 

injury or death.

Properly size all circuit breakers or fuses.

There is risk of fire, electric shock, explosion, 

physical injury or death.

Safety Instructions - Installation

DANGER

WARNING

Содержание LCN188HV4

Страница 1: ...em malfunction Do not install the unit in a noise sensitive area Periodically check that the frame is not damaged There is a risk of equipment damage Install the unit in a safe location where nobody can step on or fall onto it Do not install the unit on a defective stand There is a risk of unit and property damage Install the drain hose to ensure adequate drainage There is a risk of water leakage ...

Страница 2: ...ilation products on the chassis of the unit Do not install the unit near high frequency generator sources Do not install in an area where the unit will be exposed to volatile organic compounds Installing in an Area Exposed to Unconditioned Air In some installation applications areas floors walls in some rooms may be exposed to unconditioned air The room may be above or next to an unheated garage o...

Страница 3: ...strictions in the refrigeration components Do not over tighten flare nuts Excessive tightening will cause fittings to crack Insulate Refrigerant Pipes Sufficiently insulate all cold surfaces to prevent moisture forming All pipes must be insulated and each pipe must be separately wrapped Use field provided one half 1 2 inch thick or thicker closed cell insulation The thickness may need to be increa...

Страница 4: ...fire electric shock explosion physical injury or death WARNING The information contained in this manual is intended for use by a trained electrician familiar with applicable local codes and the U S National Electric Code NEC and who is equipped with the proper tools and test instruments Failure to carefully read and follow all instructions in this manual can result in personal injury or death Conn...

Страница 5: ...d Communications Cable Terminals Optional Wired Wall Controller Installation Since the room temperature sensor is inside the remote controller to maintain proper space temperature install the remote controller in a place away from direct sunlight high humidity and direct supply of hot or cold air Install the remote controller about 5 ft above the floor in an area with good air circulation and an a...

Страница 6: ...trations data information and other materials are the property of LG Electronics U S A Inc and are disclosed by LG Electronics U S A Inc only in confidence Due to our policy of continuous product innovation some specifications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp ...

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