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TWO-WAY VAHU INDOOR UNITS
Factory Supplied Parts and Materials
Factory Supplied Materials
• Owner’s Manual
• Installation Manual
Required Tools
• Level
• Screwdriver
• Electric drill
• Hole core drill
• Flaring tool set
• Torque wrenches
• Hexagonal wrench
• Gas-leak detector
• Thermometer
Selecting the Best Location
Do’s
• Place the unit where air circulation through the ducts will not be
blocked.
• Place the unit where drainage can be obtained easily.
• Place the unit where noise prevention is taken into consideration.
• Ensure there is sufficient strength to bear the load of the indoor
unit.
• Ensure there is sufficient maintenance space.
• Locate the indoor unit in a location that is level, and where it can
be easily connected to the outdoor unit / branch distribution unit.
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.
WARNING
Installation work must be performed by trained personnel and in accordance with national wiring standards and all local or other applicable codes.
Improper installation can result in re, electric shock, physical injury, or death.
Note:
Read all instructions before installing this product. Become familiar with the unit’s components and connections, and the order of installation. Incorrect
installation can degrade or prevent proper operation.
Don’ts
• Do not install the unit near a heat or steam source, or where
considerable amounts of oil, iron powder, or flour are used.
• Do not install the unit where sulfuric acid and flammable or cor-
rosive gases are generated, vented into, or stored.
• Do not install the unit near high-frequency generators.
• Do not install the unit near a doorway.
The unit will be damaged, will malfunction, and/or will not op-
erate as designed if installed in any of the conditions listed.
• 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 environment 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.
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.
170 | VERTICAL-HORIZONTAL
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F
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