COOK UCIC User Manual

CIC/UCIC

Tubular Centrifugal Blowers

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation and
maintenance instructions for standard units of the CIC &
UCIC Tubular Centrifugal Blowers.

Carefully read this publication and any supple­mental documents prior to any installation or
maintenance procedure.

Loren Cook catalog, CIC, provides additional informa­tion describing the equipment, fan performance, available
accessories, and specification data.

For additional safety information, refer to AMCA publica­tion 410-96, Safety Practices for Users and Installers of
Industrial and Commercial Fans.

All of the publications listed above can be obtained from
Loren Cook Company by phoning [phone],
extension 166; by FAX at [phone]; or by e-mail at
[e-mail].

For information on special equipment, contact Loren
Cook Company Customer Service Department at
[phone].

Rotating Parts & Electrical Shock Hazard:

Disconnect electric power before working on unit.
Follow proper lockout / tagout procedures to ensure

the unit cannot be energized while being installed or
serviced.

A disconnect switch should be placed near the fan
in order that the power can be swiftly cut off, in case
of an emergency and in order that maintenance
personnel are provided complete control of the
power source.

Grounding is required. All field-installed wiring must
be completed by qualified personnel. All field­installed wiring must comply with National Electric
Code (NFPA 70) and all applicable local codes.

Failure to follow these instructions could result in
death or serious injury.

Storage

If the fan is stored for any length of time prior to installation,
completely fill the bearings with grease or moisture-inhibiting
oil. Refer to Lubricants on page 6. Also, store the fan in its
original crate and protect it from dust, debris and the weather.

CIC Storage

To maintain good working condition of a CIC when it is
stored outdoors, or on a construction site, follow the addi­tional steps below.

• Cover the inlet and outlet, and belt tunnel opening to pre­vent the accumulation of dirt and moisture in the housing.

• Periodically rotate the wheel and operate dampers (if sup­plied) to keep a coating of grease on all internal bearing
parts.

• Periodically inspect the unit to prevent damaging condi­tions.

UCIC Storage

To maintain good working condition of a UCIC fan when it
is stored outdoors or on a construction site, always store in
upright position. Also, if the dampers are not mounted, cover
discharge.

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 motors and drives
will require field installation. Please refer to page 3.

CIC Installation

Arrangements 1 and 9 (FM) are floor-mounted fans. They
require a strong, level foundation of reinforced poured con­crete.

The foundation’s size is determined by fan size, 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.

Receiving and Inspection

Carefully inspect the fan and accessories for any dam-

age and shortage immediately upon receipt of the fan.

• Turn the wheel by hand to ensure it turns freely and
does not bind.

• Inspect dampers for free operation of all moving parts.

• Record on the Delivery Receipt any visible sign of

damage.

Handling

Lift the fan by the base or lifting eyes. NOTICE! Never

lift by the shaft, motor, windband, or housing.

CIC

• The weight of the foundation should be 2 to 3 times the

weight of the unit and its motor.

Arrangement 9 (CM) is a ceiling-mounted fan. Suspend
the fan by steel rods strong enough to support the weight
the fan.

UCIC Installation

The fan support (roof curb) should provide a level surface
for installation. If the roof is pitched more than 1/2:12, a
sloped curb must be used to correct for the incline. If the
unit is installed on a non-level surface, the damper door
pivot should be positioned perpendicular to the peak of the
roof.

• Drill a hole in the curb shelf for conduit needed for
motor wiring.

• Install the UCIC fan over the curb with the conduit loca­tion in line with the conduit hole in the curb.

• Firmly secure the unit to the curb.

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

Floor Mounted Spring Isolators

a. Mount fan and motor on isolation base (if supplied).
b. Elevate fan (or isolation base) to operating height and

insert blocks to hold in position.

c. 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.

d. 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.

e. Turn lock nut onto leveling bolt and secure firmly in

place against the top of the mounting flange or frame.

f. Secure isolators to mounting surface.

Ceiling Mounted Spring and Rubber-in-Shear (RIS) Iso­lators

a. Elevate fan to operating height and brace.
b. Attach threaded rod to overhead support structure

directly above each mounting hole. Rod should extend
to within a few feet of fan.

c. Attach isolator to end of threaded rod using a nut on

each side of isolator bracket.

d. Insert another section of threaded rod through the fan

mounting hole and isolator.
e. Attach two nuts to threaded rod in isolator.
f. Place adjusting nut and locking nut on threaded rod

near fan mounting bracket.
g. Alternately rotate adjusting nut at each mounting loca-

tion until the fan weight is uniformly transferred to the

isolators. Remove bracing.

Ceiling Mounted Spring Isolator

Figure 2 - Ceiling Mount Isolators

Rubber-In-Shear Ceiling Isolators

Duct Installation

Efficient fan performance relies on the proper installation
of inlet and discharge ducts. Be sure your fan conforms to
the guidelines below.

Non-Ducted Inlet Clearance

If your fan has an open inlet (no duct work), the fan must
be placed 1 fan wheel diameter away from walls and bulk­heads.

MIN

1 DIA

Rubber-In-Shear Isolator

Spring Isolator

Figure 1 -Floor Mount Isolators

Floor Mounted Rubber-In-Shear (RIS) Isolators

a. Mount fan and motor on an isolation base (if supplied).
b. Elevate fan to provide room to insert isolators between

the fan and foundation and block in position.
c. Position isolators under fan and secure bolts.
d. Remove blocks and allow fan to rest on floor. Isolators

must be installed on a level surface (leveling should

not be required).
e. Secure isolators to mounting surface.

Non-ducted Inlet Clearance

Free Discharge

Avoid a free discharge into the plenum. This will result in

lost efficiency because it doesn’t allow for a static regain.

Correct

Free Discharge

Incorrect

2

Inlet Duct Turns

1 foot

1/4 inch

For ducted inlets, allow at least 3 fan wheel diameters

between duct turns or elbows and the fan inlet.

MIN

Correct

3 DIA

Incorrect

Inlet Duct Turns

Discharge Duct Turns

Where possible, allow 3 duct diameters between duct
turns or elbows and the fan outlet. Refer to the drawing
below.

Correct

MIN

3 DIA

Incorrect

Discharge Duct Turns

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 wheel/inlet draw­ing below for correct overlap.

Adjust the overlap by loosening the wheel hub and mov­ing 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.

Size Overlap

60 - 165 3/16”

180 - 245 1/4”

270- 300 5/16”

330 - 365 3/8”

402 7/16”
445 - 490 1/2”
540 - 730 13/16”

Figure 3

Belt and Pulley Installation

Belt tension is determined by the sound the belts make
when the fan is first started. Belts will produce a loud
squeal which dissipates after the fan is operating at full
capacity. If the belt tension is too tight or too loose, lost effi­ciency and possible damage can occur.

Do not change the pulley pitch diameter to change ten­sion. This will result in a different fan speed than desired.

a. Loosen motor plate adjustment nuts and move motor

plate in order that the belts can easily slip into the
grooves on the pulleys. Never pry, roll, or force the
belts over the rim of the pulley.

b. Adjust the motor plate until proper tension is reached.

For proper tension, a deflection of approximately 1/4”
per foot of center distance should be obtained by

firmly pressing the belt. Refer to Figure 3.
c. Lock the motor plate adjustment nuts in place.
d. Ensure pulleys are properly aligned. Refer to Figure 4.

Tolerance

Center Distance

Up thru 12” 1/16”

12” up through 48 1/8”

Over 48” 1/4”

Figure 4

Maximum

Gap

Pulley Alignment

Pulley alignment is adjusted by loosening the motor pulley

setscrew and by moving the motor pulley on the motor shaft.

Figure 4 indicates where to measure the allowable gap

for the drive alignment tolerance. All contact points (indi­cated by WXYZ) are to have a gap less than the tolerance
shown in the table. When the pulleys
are not the same width, the allowable
gap must be adjusted by half of the dif­ference in width (As shown in A & B of
Figure 4). Figure 5 illustrates using a
carpenter’s square to adjust the posi­tion of the motor pulley until the belt is
parallel to the longer leg of the square.

OFFSET ANGULAR OFFSET/ANGULAR

A

W

B

CENTER

DISTANCE

(CD)

GAP

Figure 5

X
Y

Z

GAP

3

Use of Variable Frequency Drives

Motors -

Motors that are to be operated using a Variable Fre­quency Drive (VFD) must be VFD compatible. At a mini­mum, this must be a Premium Efficiency motor with Class F
insulation. Motors that are not supplied by Loren Cook
Company should have the recommendation of the motor
manufacturer for use with a VFD.

Grounding -

The fan frame, motor and VFD must be connected to a
common earth ground to prevent transient voltages from
damaging rotating elements.

Wiring -

Line reactors may be required to reduce over-voltage
spikes in the motors. The motor manufacturer should be

Wiring Diagrams

Single Speed, Single Phase Motor

Ground A

L

T-1

T-4

Ground B

When ground is required, attach to ground A or B with no. 6 thread forming
screw. To reverse, interchange T-1 and T-4.

1
Line
L

2

consulted for recommended line impedence and usage of
line reactors or filters, if the lead length between the VFD
and the motor exceeds 10 feet (3m).

Fan -

It is the responsibility of the installing body to perform
coast-down tests and identify any resonant frequencies
after the equipment is fully installed. These resonant fre­quencies are to be removed from the operating range of
the fan by using the “skip frequency” function in the VFD
programming. Failure to remove resonant frequencies
from the operating range will decrease the operating life of
the fan and void the warranty.

3 Phase, 9 Lead Motor
Y-Connection

Low Voltage

208/230 Volts

4

5

6

1

728

3
9

L2L

L

1

3

High Voltage

460 Volts

456

789

12

L2L

L

1

3 Phase, 9 Lead Motor
Delta-Connection

Low Voltage

3

3

208/230 Volts

7
6

1

L

1

9

8

5

4

3

2

L

L

3

2

High Voltage

460 Volts

789
456

3

12

L

L

L

1

3

2

2 Speed, 2 Winding, Single Phase Motor

Ground A

T-1

T-4

Ground B

When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-1 and T-4 leads.

High Speed

L

1

L

2

Low Speed

Line

Single Speed, Single Phase, Dual Voltage

Ground A

L

Line

L

1

T-5

J-10

2

Ground B

T-5

J-10

Ground B

When ground required, attach to ground A or B with No. 6 thread forming
screw. To reverse, interchange T-5 and J-10 leads.

Link A
Link B

Low Voltage

Ground A

Link A & B

L

Line

L

1

2

Typical Damper Motor Schematic

Fan

Motor

Transformer**

Transformer**

L3
L2

For 3 phase, damper motor voltage should be the same between L1 and

L1

L2. For single phase application, disregard L3. Damper motors may be
available in 115, 230 and 460 volt models. The damper motor nameplate
voltage should be verified prior to connection. ** A transformer may be pro­vided in some installations to correct the damper motor voltage to the
specified voltage.

2 Speed, 1 Winding, 3 Phase Motor

High Speed

1

Together

2

Motor

To reverse, interchange any 2 line leads. Motors require magnetic control.

3

L

4

1

L

5

2

6

Line

L

3

Low Speed

Motor

L

1

1

L

2

2

L

3

Open

Line

3
4

5
6

2 Speed, 2 Winding, 3 Phase

To reverse: High Speed-interchange leads T11 and T12.
Low Speed-interchange leads T1 and T2. Both Speeds-interchange any 2
line leads.

Damper

Motor*

Second

Damper

Motor

4