COOK CP - Manual (Page 2)

2
Floor Mounted Spring Isolators
1. Mount fan and motor on isolation base (if supplied).
2. Elevate fan (or isolation base) to operating height and
insert blocks to hold in position.
3. Position isolators under the fan and vertically align by
inserting leveling bolt through mounting holes in the
fan or the base. The isolator must be installed on a
level surface.
4. Adjust the isolators by turning the leveling nut counter
clockwise several turns at a time alternately on each
isolator until the fan weight is transferred onto the
isolators and the fan raises uniformly off the blocks.
Then remove the blocks.
5. Turn lock nut onto leveling bolt and secure firmly in
place against the top of the mounting flange or frame.
6. Secure isolators to mounting surface.
Floor Mounted Rubber-In-Shear (RIS) Isolators
1. Mount fan and motor on an isolation base (if supplied).
2. Elevate fan to provide room to insert isolators between
the base and foundation and block in position.
3. Position isolators under fan and secure bolts.
4. Remove blocks and allow fan to rest on floor. Isolators
must be installed on a level surface (leveling should
not be required).
5. Secure isolators to mounting surface.
Rubber-In-Shear Ceiling Isolators Ceiling Mounted Spring Isolator
Figure 1 - Ceiling Mount Isolators
Figure 2 -Floor Mount Isolators
Rubber-In-Shear Isolator Spring Isolator
Foundation
This fan requires a strong, level foundation of reinforced
poured concrete. A correctly designed concrete foundation
provides the best means for mounting floor units. The
foundation’s size is determined by fan size and
arrangement, motor size and position, and the specific
location of the installation.
Use the following guidelines to calculate foundation size:
• The overall dimensions of the foundation should
extend at least 6 inches beyond the outline of the fan
and its motor.
• The weight of the foundation should be 2 to 3 times the
weight of the unit and its motor.
Isolation
NOTICE! Although a certain amount of vibration is
inherent in operating centrifugal fans, extreme
vibration is a serious problem that may cause
structural and mechanical failure.
Isolation Base: To prevent vibration and noise from being
transferred to the building isolators are recommended.
Arrangement 1, 2, & 3 (CA or CF) fans require an isolation
base to effectively isolate the fan system which includes the
fan, base, motor, drive, guards, etc. Bases must have
sufficient rigidity to resist belt pull and prevent drive
distortion which can lead to excessive belt and bearing
wear; its perimeter should contain all base angles and
rotating parts. Arrangement 9 or 10 fans (CA, CF, and CP)
above size 270 require isolation rails. Please consult
factory for isolation of arrangement 9 fans due to the
potential of uneven loading caused by the motors and
drives. Isolators should be located between the fan system
and the support structure.
Ceiling Mounted Isolators: Some applications require fan
systems designed for floor mounting to be suspended from
ceiling supports. In such cases, all CA, CF, or CP fans of all
arrangements should be installed on either rails or bases in
the classical orientation. Typically, these systems are hung
from the corners by rods, which include isolation hangers of
either spring or rubber-in-shear design. NOTICE! Under no
circumstances is the fan to be inverted and hung by its
base angles.
The attachment of roof mounted fans to the roof curb
as well as the attachment of roof curbs to the building
structure must exceed the structural requirements
based on the environmental loading derived from the
applicable building code for the site. The local code
official may require variations from the recognized
code based on local data. The licensed engineer of
record will be responsible for prescribing the correct
attachment based on construction materials, code
requirements and environmental effects specific to
the installation.
Failure to follow these instructions could result in
death or serious injury.