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CAR-MON PRODUCTS, INC. 1225 Davis Road, Elgin, IL 60123 Phone (847) 695-9000
HANDLING
Fans should be hoisted with slings placed around the fan housing. When a single hoist is used, a "spreader" will
keep the sling from slipping on the housing. If it is necessary to use hooks placed in lifting holes of fans, BE
CAREFUL NOT TO DISTORT OR BEND THE HOUSING. Large units may have lifting lugs or holes which should
be used in place of the sling.
Chain or wire slings should be well padded where they contact the fan, especially where special coatings and
paints are involved. Rubber, phenolic enamels, etc. require special care as they may easily be damaged by
contact in lifting. Even a small chip will destroy the corrosion prevention seal of the coating and allow corrosion to
start. Always repair scratched surfaces with touch-up like coating prior to installation.
STORAGE
If the fan is to be stored for any length of time, appropriate care should be taken to protect bearings, shaft and
finished surfaces from moisture, dirt, dust, etc. Do not store other products on top of fan equipment. Periodic
inspections of the unit should be made until it is ready to be put into service. If fans are stored for a considerable
period that may pass the time of the warranty agreement, the warranty will not apply.
FOUNDATIONS-GENERAL
A rigid level foundation is a must for every fan. It assures permanent alignment of fan and driving equipment and
freedom from excess vibration, minimizing maintenance costs. Foundation must be cast separate from any
adjacent floor structure and separated around edges by at least 3/4" tar felt to prevent transmission of vibration in
either direction. The sub-foundation (soil, stone, rock, etc.) should be stable enough to prevent uneven settling of
fan foundation. Car-Mon is not responsible for foundation design. The natural frequencies of the foundation must
be sufficiently removed from the rotational frequency of the fan to avoid resonant conditions.
EQUIPMENT MOUNTED FANS
If the fan is mounted on equipment having parts which cause vibration, it is very important that the fan support is
rigid enough to prevent such vibration being carried to the fan. The resonant frequency of the support should
avoid the fan running speed by at least 20%. It may be advisable to use vibration isolators under the fan.
STRUCTURAL STEEL FOUNDATION
When a structural steel foundation is necessary, it should be sufficiently rigid to assure permanent alignment. It
must be designed to carry, with minimum deflection, the weight of the equipment plus the loads imposed by the
centrifugal forces set up by the rotating elements. We recommend welded, riveted, or suitably locked structural
bolted construction to best resist vibration. In certain applications, it is recommended that vibration isolators,
selected specifically for weight and span conditions, be installed.
Fans installed above ground level should be located near to, or above a rigid wall or heavy column. An overhead
platform or support must be rigidly constructed, level and sturdily braced in all directions.
POURED CONCRETE FOUNDATIONS RECOMMENDED
Poured concrete under the fan and all drive components is the best fan foundation. a generally accepted rule of
thumb is that the weight of the concrete foundation be a least three (3) times the total weight of the equipment it
will support. This weight acts as an inertia block to stabilize the foundation. Where the ground is soft the
foundations should be flared or the footing course increased in size to resist settling. the top should extend at
least size (6) inches outside the outline of the fan base and should be beveled on the edges to prevent chipping.
VIBRATION ISOLATION
Car-Mon recommends the use of vibration isolation. Rubber in shear (RIS) can be used with the fan mounted on
grade with fan wheel diameters up to but not including 27 inches. At 27" and larger only spring isolation should be
used. Other construction is available. On occasion it may be advisable to use an isolation base to better distribute
the load to be isolated.
