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MacroAir Technologies Inc. www.macro-air.com Toll Free: 866-668-3247 Build: January 9 2009
Please Read this Important Information Before you Install Fans
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Make sure Power is OFF before beginning any installation or maintenance procedure.
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Refer to the enclosed packing list and verify that all fan components are included before you begin.
1.1 Key Safety System Components
MacroAir fans are engineered with key safety features to prevent pieces of the fan from falling in the
unlikely event of a catastrophic failure. Used together, these systems and devices provide
comprehensive protection of people, equipment, and property. Follow the detailed instructions precisely
when installing fans, including the installation of the following:
Install safety cable and guy wires on every fan. Properly installed, the guy wires will keep the fan stable in
case of earthquake or, for “outdoor” installations where high wind conditions may occur. The safety
cable, if installed per MacroAir specifications, will prevent the fan from falling in the unlikely event the
mounting system should fail.
Install the complete set of blade safety links, which connect each blade to the adjacent blades, and the
safety link extensions, which reinforce the area between the mounting holes. This is an important
precautionary measure should a blade break off at the hub for any reason.
1.2 Placement and Spacing
Check the area where fans will be mounted to determine vertical and horizontal spatial clearances. A
standard ceiling fan is mounted so the measurement from the bottom of the beam to the bottom of a
fan’s hub is 3 feet. Extensions may be ordered to lower the fan if needed. Ceiling fans should be
mounted so the lowest part; the blades, are located at a minimum of 10 feet above the floor. If possible,
avoid mounting fans directly below lights or skylights to avoid any strobe effect caused by moving blades.
Note, a large fan, 20 – 24 feet in diameter, performs best at 20 to 30 feet above the floor, but acceptable
performance has been demonstrated as low as 10 feet and as high as 50 feet.
If the building has a mezzanine, fans should be mounted so a person can not reach a fan in any way from
the upper level/deck. Make certain fans are positioned so the blade tips are at least 3 feet away from
any area where a person may be able to extend outward to reach them.
1.3 Fan Clearance Drawing
Note, fans must be far enough below the ceiling to allow proper air circulation — no closer than 15% of
the fan diameter. Due to the design of our fans and mounting hardware, fan blades droop
approximately six inches below the bottom of the hub when the fan is at rest. If required, extension
mounts are available from the factory. For more information, refer to the “Fan Clearance” drawing, see
Figure 1 on page 8.
1.4 Mark Floor to Alert Personnel
When mounting a fan in an area where materials may be elevated into its path, MacroAir recommends
marking or painting the floor with a large crosshatched circle to alert personnel of the overhead location
of fans.
