Duct Installation - COOK PLC Installation, Operation And Maintenance Manual

Store the fan in its original crate and protect it from dust,
debris and weather.
Outdoor Storage
• Coat shaft with grease or a rust preventative compound
• Wrap bearings for weather protection
• Cover entire fan to prevent accumulation of dirt and mois-
ture in fan
• Periodically rotate wheel and operate dampers (if supplied)
• Periodically inspect fan to prevent damaging conditions
Installation
Most motors are shipped mounted on the fans with belts
and drives installed. However, extremely heavy motors
and drives are shipped separately and some motors are
shipped separately due to height limitations. These mo-
tors and drives will require field installation. Please refer
to page 4.
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 foun-
dation'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 six inches beyond the outline of the fan and its
motor
• The weight of the foundation should be two to three
times the weight of the fan and its motor
Isolation
NOTICE! Although a certain amount of vibration is
inherent in operating centrifugal fans, extreme vi-
bration is a serious problem that may cause struc-
tural and mechanical failure.
Isolation Base
If supplied, mount the fan on the rigid isolation base that
runs the entire length of the fan base angle.
When the motor is not an integral part of the unit, mount
the fan and its motor to a common rigid base running the
full length of the fan and motor.
The base must have sufficient rigidity to resist belt pull
and prevent drive distortion which can lead to excessive
belt and bearing wear. Isolators should be located be-
tween this rigid base and the floor.
Isolators
Floor Mounted Spring Isolators
1. Mount fan and motor on an 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/or isolation base 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 counterclock-
wise 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.
PLC IO&M
Spring Isolator
Figure 1 - Floor Mount Isolators
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 base
and foundation or between the fan and foundation and block
in position.
3. Position isolators under isolation base or fan and secure bolts.
4. Remove blocks and allow unit to rest on floor. Isolators must
be installed on a level surface (leveling should not be required).
5. Secure isolators to mounting surface.

Duct Installation

Efficient fan performance relies on proper installation.
If the fan has an open inlet (no duct work), be sure it is
placed one fan wheel diameter away from walls and bulk-
heads. Refer to Figure 2.
Minimum
1 wheel
diameter
Figure 2 - Non-ducted Inlet Clearance
Figure 2: Non-ducted Inlet Clearance*
*Refer to the PLC catalog for discharge wall proximity factors.
Wheel-to-Inlet Clearance
The correct wheel-to-inlet clearance is critical to proper
fan performance. This clearance should be verified before
initial start-up since rough handling during shipment could
cause a shift in fan components. Refer to the wheel/inlet
drawing below for correct overlap.
Adjust the overlap by loosening the wheel hub and mov-
ing the wheel along the shaft to obtain the correct value.
A uniform radial gap (space between the edge of the
cone and the edge of the inlet) is obtained by loosening the
inlet cone bolts and repositioning the inlet cone.
Wheel/Inlet Overlap
SEE DETAIL A
RADIAL GAP
2
Rubber-in-Shear Isolator
Overlap
Size
(inches)
120
0.250
135
150 0.313
165
0.375
OVERLAP
180
195
0.438
210
225 0.500
245 0.563
270 0.625
300 0.688
330 0.625
365 0.688
402 0.750
DETAIL A
445 0.875
490 0.938
540 1.063
600 1.108
660 1.313
730 1.438
B51023-002