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44 | duct (HIgH StatIc)
Ceiling-Concealed Duct (High Static) System Engineering Manual
outdoor unit
PlaCement ConSiderationS
Tie-Downs / Wind Restraints and Lightening Protection
The strength of the Ceiling-Concealed Duct (High Static) system
outdoor unit frame is adequate to be used with field-provided wind
restraint tie-downs.
Tie-Downs / Wind Restraints
•
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.
Lightening Protection
•
To protect the outdoor unit from lightning, it should be placed within
the specified lightning safety zone.
•
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.
Ground
Safe zone
Lightning rod
Protection Angle (25˚~55˚)
1.5m
5 feet
Lightning rod
Figure 26: Lightening Protection Diagram.
Table 26:
Safety Zone Specifications.
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 lightening strike. Inform the customer of
this possibility in advance.
general mounting
Securely attach the outdoor unit to a condenser pad, base rails, or other mounting platform
that is securely anchored to the ground or building structure. The underlying structure or
foundation must be designed to support the weight of the unit, and avoid placing the outdoor
unit in a low lying area where water may accumulate.
Attaching the Outdoor Unit to the Bracket
When installing the outdoor unit on a wall or roof top, anchor the mounting base securely
using nails or wire with regard to wind and earthquake or vibration.
Refer to installation manual, and follow the applicable local code for clearance, mounting,
anchor, and vibration attenuation requirements.
Figure 27: Bracket Mounting.
•
All referenced materials are to be field-supplied.
•
Images are not to scale.
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