52 | LIMITS / PLACEMENT
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TI V S Three-Phase Outdoor Unit Engineering Manual
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THREE-PHASE
Figure 22: Prevailing Wind
Direction.
Wind Protection
If the outdoor unit is placed on a roof, position it with the compressor
end (no coil surface) in the direction of the prevailing wind as shown
in the figure at right. In cooler climates, it can be beneficial to
position the unit in direct sunlight to assist with defrost operations.
If the outdoor unit is not placed on a roof, place it on the leeward
side of the building or in a location where the unit will not be
exposed to constant wind.
If placement exposes the unit to constant wind activity, construct a
wind break in front of the unit. Follow the placement guidelines set
forth in “Clearance Requirements”.
Prevailing Winds
Prevailing
Winds
Figure 23: Leeward Side of the
Building.
Prevailing Winds
Wall or Other Wind Break
Figure 24: Wind Break.
Mounting Platform
The underlying structure or foundation must be designed to support the weight of the unit.
Avoid
placing the unit in a low lying area where water will accumulate.
Oceanside Installation Precautions
•
Avoid installing the outdoor unit where it
would be directly exposed to ocean winds.
• Install the outdoor unit on the side of the building
opposite from direct ocean winds.
• Select a location with good drainage.
• Periodically clean dust or salt particles off of the
heat exchanger with water.
The system will take longer to provide heat, or heating performance will be reduced in winter if the outdoor unit is installed:
Planning for Snow and Ice, continued.
Tie-Downs and Wind Restraints
The strength of Multi V frames 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.
Additional anti-corrosion treatment will
need to be applied to the outdoor unit at
oceanside locations.
If the outdoor unit must be placed in a location
where it would be subjected to direct ocean winds,
install a concrete windbreaker strong enough to
block any winds. Windbreaker height and width
must be more than 150% of the outdoor unit, and
be installed at least 27-1/2 inches away from the
outdoor unit to allow for airflow.
Ocean winds will cause corrosion, particularly on the
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Choose an area where run-off from defrost mode will not accumulate and freeze on sidewalks or driveways. Properly install and insulate any drain
hoses to prevent the hose from freezing, cracking, leaking, and damaging the outdoor unit.
1. In a narrow, shady location.
2. Near a location that has a lot of ground moisture.
3. In a highly humid environment.
4. In an area in which condensate does not drain properly.
Ocean Winds
Windbreak
Ocean Winds
Ocean Winds
SELECTING THE BEST LOCATION FOR THE
OUTDOOR UNIT(S)
