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MULTI
F
MAX
MULTI
F
Installation and Best Layout Practices
DUCT (HIGH STATIC) INDOOR UNITS
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas (floors, walls) in some rooms will be exposed to unconditioned air (room will be above or next to an
unheated garage or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet will increase the temperature by three degrees).
• Add insulation between the floor joists.
• Install radiant heat or another type of heating system to the floor.
Installing in an Area with High Humidity Levels
If the environment is prone to humidity levels of 80% or more (near the ocean, lakes, etc.) or where steam could collect in the plenum:
• Install additional insulation to the indoor unit (glass wool insulation >13/32 inches thick).
• Install additional insulation to the refrigerant piping (insulation >13/16 inches thick).
• Seal all gaps between the indoor unit and the ceiling tiles (make the area air tight) so that humidity does not transfer from the plenum to the
conditioned space. Also, add a ceiling grille for ventilation.
Figure 159: Access Panel and General Service Space Required
Dimensions.
Figure 160: Indoor Unit Bolt Locations.
23-5/8 inches x 23-5/8 inches
23-5/8
inches
39-3/8
inches
H = ≥25/32 inches
23-5/8
inches
Model / Capacity
(Btu/h)
Dimensions (inches)
A B C D E F G H I J
LHN248HV / 24,000 36-3/4 38-1/4 24-3/8 27-9/16 1-3/16 10-5/8 19/32 33-25/32 7-15/16 35-7/16
LHN368HV / 36,000 50-17/32 52-1/32 24-3/8 27-9/16 1-3/16 10-5/8 19/32 47-9/16 7-15/16 49-7/32
Table 65:Indoor Unit Bolt Location Dimensions.
• Indoor units (IDUs) must not be placed in an environment where the IDUs will be exposed to harmful volatile organic compounds (VOCs)
or in environments where there is improper air make up or supply or inadequate ventilation. If there are concerns about VOCs in the envi-
ronment where the IDUs are installed, proper air make up or supply and/or adequate ventilation must 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.
• If the unit is installed near a body of water, the installation parts are at risk of corroding. Appropriate anti-corrosion methods must be taken for
the unit and all installation parts.
C
E
G
D
F
I
A
J
B
H
Drainage hole
DUCT (HIGH STATIC) | 127
Ceiling-Concealed Duct (High Static)
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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