Installation, Operation & Maintenance Manual
IM-995
21
Optional Accessories (cont.)
Unitary Bases
– Unitary bases are rigidly mounted to a
foundation. Situations may arise where the base may
require concrete to dampen vibration or increased
stiffness. In situations where concrete must be added to
the base the following guide must be utilized.
1. Rebar must be added to the cross section of the
base (by others) so the concrete will have good
adhesion points throughout the sections of the base.
Typically rebar is installed at 12" centers however
the placement of rebar should be reviewed for each
individual application by a Civil Engineer if required.
2. Bases should be located in their final resting area
prior to being filled with concrete. Bases should
be shimmed and grouted. Once the grout is cured,
concrete may be added. Pour concrete (by others)
into the base and remove excess concrete on the
top side of the base to maintain an even mounting
surface for fan mounting.
11. Concrete Filled Pedestals
— Fans may require the bearing
and/or motor pedestals to be filled with concrete (by
others) for additional stiffness and rigidity, refer to the
fan’s drawing for requirements. Fans must utilize rebar
in the pedestals so the concrete will have good adhesion
points throughout.
To fill the pedestal, the pedestal must be set on flat, level
ground before concrete is added. It is recommended to
locate the fan at the final location. The fan should be
leveled, shimmed and grouted prior to adding concrete.
An optional bottom pan is available for the pedestal if it is
unfeasible to add concrete at the final location. Pedestals
must be placed on the ground for filling until the concrete
cures. If no bottom pan is provided, a piece of plywood
covered in plastic may be placed under the base while
filling with concrete. Fill the pedestal with concrete (by
others) to the level indicated on the drawings. After the
concrete cures the fan may be installed. Do not utilize
the fan’s lifting lugs after concrete has been added to the
fan. The lifting lugs are designed to lift the fan as it was
shipped from the factory.
Concrete cure time varies depending on the base size, ambient
temperature and cement mixture requested. Be sure concrete is
100% cured prior to moving equipment.
NOTICE
Centrifugal Fan on Unitary Base
Click To View Our
Unitary Base Installation Video
Содержание CD-1261
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