Rooftop Installations - LG MULTI F Engineering Manual
Multi f; multi f max with lg red heat pump outdoor unit
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- Installation manual (361 pages) ,
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- Install (9 pages)
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F
MULTI
WITH
F
MULTI
MAX
Planning for Snow and Ice, continued.
When deciding on a location to place the outdoor unit, be sure to choose an area where run-off from defrost will not accumulate and freeze on side-
walks or driveways, which may create unsafe conditions. Properly install and insulate any drain hoses to prevent the hose from freezing, cracking,
leaking, and causing unsafe conditions from frozen condensate.
Rooftop Installations
If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring method are adequate for
the unit location. Consult local codes regarding rooftop mounting.
Oceanside Installation Precautions
• 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.
Avoid installing the outdoor unit where it would be directly exposed to
ocean winds.
Additional anti-corrosion treatment may need to be applied to the out-
door unit at oceanside locations.
Tie-Downs and Lightning Protection
Tie-Downs
• The strength of the roof must be checked before installing the
outdoor units.
• If the installation site is prone to high winds or earthquakes, when
installing on the wall or roof, securely anchor the mounting base
using a field-provided tie-down configuration approved by a local
professional engineer.
• The overall tie-down configuration must be approved by a local
professional engineer. Always refer to local code when using a
wind restraint system.
Lightning Protection
• To protect the outdoor unit from lightning, it should be placed within
the specified lightning safety zone.
Table 31:
Building Height (feet)
• Power cable and communication cable should be installed five (5)
feet away from lightning rod.
• A high-resistance ground system should be included to protect
against induced lightning or indirect strike.
If the building does not include lightning protection, the outdoor unit may be damaged from a lightening strike. Inform the customer of this possibility
in advance.
PLACEMENT CONSIDERATIONS
Selecting the Best Location for the Outdoor Unit
66
98
148
197
55
45
35
25
©
Ocean winds may cause corrosion, particularly on the condenser and
cient performance.
Ocean winds
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 should 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.
Figure 47: Lightning Protection Diagram.
Lightning rod
Lightning rod
5 feet
Ground
Ocean winds
Windbreaker
Ocean winds
Protection Angle (25˚~55˚)
1.5m
Safe zone
PIPING AND PLACEMENT | 59
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