2
Selecting the Installation Location
DANGER
To avoid the possibility of fire, do not install the unit in an area where combustible gas may generate, flow,
stagnate, or leak. Failure to do so will cause serious bodily injury or death. Before beginning installation, read the
safety summary at the beginning of this manual.
Note:
Select a location for installing the indoor unit (IDU) that meets the following conditions:
• Where there is enough structural strength to bear the weight of the unit.
• Operating sound from the unit will not disturb occupants.
• Include enough space for service access.
• Include space for drainage to ensure condensate flows properly out of the unit when it is in cooling mode.
• Use a level indicator to ensure the unit is installed on a level plane.
Note:
The unit may be damaged, may malfunction, and/or will not operate as
designed if installed in any of these conditions:
Do not install the unit near a heat or steam source, or where
considerable amounts of oil, iron powder, or flour are used. These
materials may generate condensate, cause a reduction in heat ex-
changer efficiency, or malfuction of the condensate drain. If this is
a potential problem, install a ventillation fan large enough to vent
out these materials
Do not install the unit where it will be subjected to direct ther-
mal radiation from other heat sources.
Do not install the unit in an area where combustible gas may
generate, flow, stagnate, or leak. There is the possibility of fire.
Do not install the unit in a location where acidic solution and
spray (sulfur) are often used.
Do not use the unit in environments where oil, steam, or sulfu-
ric gas are present.
Do not install additional ventilation 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 or storeroom. To counter
this condition:
• Verify that carpet is or will be installed (carpet may increase
the temperature by three (3) degrees.
• Install radiant heat or another type of heating system to the floor.
• Add insulatiion between the floor joists.
Install a ventilation fan
with sufficient capacity
Heat or steam source
Include enough
distance
Indoor Unit
Cassette Indoor Units Installation General Information
Cassette Indoor Units Installation Tips
This document contains general installation tips for installing LG cassette indoor units (IDU). Follow all applicable local and national codes
during installation. For more detailed information, refer to the individual unit’s installation manual on www.lghvac.com.
The typical unit installation includes:
• Selecting the installation location
• Installing the unit
• Connecting refrigerant pipes
• Connecting drain pipe
• Connecting communication and power wiring
• Installing the remote controller (if applicable)
Always follow your system diagrams, including the LATS diagram (if applicable).
Installing Near a Heat or Steam Source
Ceiling Board
Unit: inch
19 -11/16
or more
or more
39 - 3/8
or more
No gap
required
19 -11/16
or less
11 -13/16
“A”
Ceiling Cassette
Ceiling beam or
other obstruction
Any objects in room
(cabinets, furniture, etc.)
Floor
Ceiling
W
A
L
L
Below 36 kBtu: at least 70 - 7/8; not more than 11ft 9-23/32in
Over 36 kBtu: at least 70 - 7/8; not more than 13ft 9-11/32in
“A” =
Ceiling Board
Typical Clearances Around Installed Unit
