LG Multi V mini Engineering Manual page 56

PLACEMENT CONSIDERATIONS
The Multi V Mini outdoor unit is designed to operate properly in
a wide range of environmental conditions, but correct placement
of the outdoor unit is essential for maximizing unit performance.
Consider the following factors.
Wind Protection
If the outdoor unit is located
on a roof, position it with
the compressor end (no coil
surface) in the direction of the
prevailing wind as shown in
Figure 14. In cooler climates,
it may be beneficial to position
the unit in direct sunlight to as-
sist with defrost operations.
If the outdoor unit is not located
on a roof, it would be best to
place it on the leeward side
of the building or in a loca-
tion where the unit will not be
exposed to constant wind as
shown in Figure 15.
If placement exposes the unit to
constant wind activity, construct a
wind break in front of the unit as
shown in Figure 16. Follow the
placement guidelines set forth
in "Clearance Requirements" on
page 59.
Mounting Platform
The underlying structure or foundation must be designed to support
the weight of the unit. Unit weight is listed on the"Cut-sheet" on
page 82. Avoid placing the unit in a low lying area where water
may accumulate.
Tie-Downs and Wind Restraints
The strength of the Multi V Mini chassis is adequate to be used
with field-provided wind restraint tie-downs. The overall tie-down
configuration must be approved by a local professional engineer.
Always refer to local code when designing a wind restraint system.
58 SYSTEM ENGINEERING
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Figure 14
Prevailing Winds
Figure 15
Prevailing
Winds
Figure 16
Wall or other wind break
Prevailing
Winds
Due to our policy of continuous product innovation, some specifications may change without notification.
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Dealing with Snow and Ice
In climates that experience snow buildup, place the unit on a raised
platform to ensure proper outdoor unit coil airflow. The raised support
platform must be high enough to allow the unit to remain above the
anticipated snow accumulation level (consider snow drifts). Design
the mounting base to prevent snow accumulation on the platform in
front or back of the unit case. If necessary, use inlet and discharge
duct or a snow hood to prevent snow or ice from accumulating on
the coil, fan blades, and fan guards. Best practice prevents snow
from accumulating on top of the unit as well. When the system is
commissioned, adjust the DIP switch for "snow throw" operation if a
snow hood is not used. In all cases, the outdoor unit supply and/or
discharge duct work or hood must be designed to have a combined air
pressure drop rating that does not exceed 0.16 in-wg.
Snow throw mode does not prevent ice from forming
Note:
on the fan blade or discharge grille.
Ambient Air Conditions
Do not place the unit in a corrosive environment. Avoid exposing
the outdoor unit to steam, combustible gases, chimneys, steam relief
ports, other air conditioning units, kitchen vents, plumbing vents,
discharge from boiler stacks, and other sources of extreme tempera-
ture, gases, or substances that may degrade performance or cause
damage to the unit. When installing multiple outdoor units, avoid
placing the units where discharge air from the front of one outdoor unit
is blown into the back side of an adjacent unit.
Electromagnetic Waves
Do not expose the unit to electromagnetic waves from equipment
including, but not limited to generators, MRI equipment, or other
equipment that emits electromagnetic waves.
The control system may be affected by electromagnetic waves, which
may result in abnormal system operation. Also, the inverter compo-
nents in these units may generate electromagnetic noise. Therefore,
ensure that there is enough distance between the outdoor unit and
any computer, stereo, and other electronic equipment. In weak elec-
trical wave areas, ensure there is at least 9.8 feet between indoor unit
remote controllers and other electrical devices. Insert power cables
and other wires into separate conduits.
Handling Outdoor Unit Condensate
While operating in the Heating mode, the surface temperature of the
outdoor coil may drop below the dew-point of the surrounding air.
Moisture may condense on the coil fins and subsequently drain onto
the surface of the surrounding area from the bottom of the unit case.
If the designer chooses to control the flow of condensate from the
outdoor unit, install a field-provided drain pan under the unit and pipe
the condensate to a nearby drain. Mount the unit in the pan on rails
or isolation pads. If the unit will be operating near or below freezing
with a condensate drain pan installed, consider installing heat tape
in the bottom of the outdoor unit drain pan and along the condensate
drain line.