Engineering Manual

VERTICAL-HORIZONTAL INDOOR UNITS
Factory Supplied Parts and Materials
Factory Supplied Materials
• Owner’s Manual
• Installation Manual
• Simple Controller with Mode Selection (AKB72955816)
1
1
Simple Mode Controllers for the vertical-horizontal air handling indoor
units are also referenced by Model No. PQRCVCL0QW.
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.
If the unit is installed near a body of water, certain components are at risk of being corroded. Appropriate anti-corrosion methods should be taken
for the unit and all components.
Don’ts
• The unit should not be installed near a heat or steam source, or
where considerable amounts of oil, iron powder, or flour are used.
• The unit should not be installed where sulfuric acid and flammable or
corrosive gases are generated, vented into, or stored.
• Avoid installing the unit near high-frequency generators or near any
equipment that generates an electromagnetic field (minimum 3-1/3
feet away).
• Do not install the unit near a doorway.
The unit may be damaged, may malfunction, and / or will
not operate as designed if installed in any of the conditions
listed.
• Read all instructions before installing the product.
• Installation work must be performed by authorized personnel and in accordance with the national wiring standards and all local
codes.
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas(floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an
unheated garage or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet may 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.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
164 | VERTICAL-HORIZONTAL
Multi F and Multi F MAX Indoor Unit Engineering Manual
MULTI
F
MAX
MULTI
F