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Planning for Snow and Ice
To ensure the outdoor unit operates properly, certain measures are required in locations where there is a possibility of heavy snowfall or
severe windchill or cold:
1. Prepare for severe winter wind chills and heavy snowfall, even in areas of the country where these are unusual phenomena.
2. Position the outdoor unit so that its airflow fans are not buried by direct, heavy snowfall. If snow piles up and blocks the airflow, the
system may malfunction.
3. Remove any snow that has accumulated four (4) inches or more on the top of the outdoor unit.
4. In climates that may experience significant snow buildup, mount the outdoor unit on a raised, field-provided platform or stand. The raised
support platform must be high enough to allow the unit to remain above possible snow drifts, and must be higher than the maximum antici-
pated snowfall for the location.
5. Design the mounting base to prevent snow accumulation on the platform in front or back of the unit frame.
6. Provide a field fabricated snow protection hood to keep snow and ice and/or drifting snow from accumulating on the coil surfaces.
7. Install a hail guard kit and air guide accessories (sold separately) to prevent snow or rain from accumulating on the fan inlet / outlet guards.
8. Consider tie-down requirements in case of high winds or where required by local codes.
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.
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.
Figure 43: Lightning Protection Diagram.
Tie-Downs, Wind Restraints, 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.
Always refer to local code when designing a wind restraint system.
Lightning Protection
• To protect the outdoor unit from lightning, place the unit within the
specified lightning safety zone.
• Power cable and communication cable must be installed five (5)
feet away from lightning rod.
• A high-resistance ground system must be included to protect
against induced lightning or indirect strike.
Ground
Safe zone
Lightning rod
Protection Angle (25˚~55˚)
1.5m
5 feet
Lightning rod
Table 45: Safety Zone Specications.
Building Height (feet) 66 98 148 197
Protection Angle (˚) 55 45 35 25
If the building does not include lightning protection, the outdoor unit
may be damaged from a lightning strike. Inform the customer of this
possibility in advance.
PLACEMENT CONSIDERATIONS
Outdoor Unit
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.
APPLICATION | 73
Application Guidelines
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