pattersonfan.com
800.768.3985
5
FAN SPACING, PLACEMENT, & CLEARANCE
Fans should be mounted such that the blades are a minimum of 10 feet above the floor. The ideal height
is 20 to 25 feet. Also, ensure that the fan blades have a clearance equal to 15% of the fan’s diameter in all
directions.
Care should be taken when installing the fan around a fire sprinkler system. The VFD is equipped with the
ability to connect to a fire suppression system – stopping the fans in case of a fire. However, it is the
responsibility of the installer to read and comply with all local codes and regulations.
MAINTENANCE
Prior to performing any maintenance on the fan, it MUST be disconnected from the power source
by means of the separate lockable disconnect (provided).
VFD Box – Clean heat dissipating fins on the back of the box periodically.
Gearbox – Periodic maintenance will ensure your fan remains operational for its intended life. While
Patterson recommends the end-user check and change the gearbox oil annually, failure to do so will not void
any warranties. Oil type used is Chevron® Delo Gear ESI 85W-140. Contact Patterson at (800) 768-3985 for
availability.
Hub Grease – Hub should be inspected yearly to ensure proper lubrication. Grease type is Chevron Delo
HD Moly 5%. There are two grease fittings, an upper and lower. Add grease as needed, filling each area
slowly until grease passes through the upper seal.
Mounting Hardware – All nuts and bolts related to mounting of the fan unit should be checked for tightness
annually. In addition, guy wires need to be inspected to ensure they remain taut and show no signs of
fraying.
Blades – Blades can be occasionally wiped down with a damp cloth. A mild detergent can also be used if
desired.
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