Loren Cook CIC Installation 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

this publication prior to any installation or mainte­nance procedure.

Loren Cook catalog,
describing the equipment, fan performance, available
accessories, and specification data.

For additional safety information, refer to AMCA publica­tion 410-96,

Industrial and Commercial Fans

All of the publications listed above can be obtained from
Loren Cook Company by phoning 417/869-6474, extension
166; by FAX at 417/832-9431; or by e-mail at info@loren­cook.com.

For information on special equipment, contact Loren
Cook Company Customer Service Department at 417/869-

6474.

Safety Practices for Users and Installers of

CIC

, provides additional information

.

. Carefully read

Receiving and Inspection

Carefully inspect the fan and accessories for any damage
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
age.

WARNING

This unit has rotating parts. Safety precautions
should be exercised at all times during installation,
operation, and maintenance.
ALWAYS disconnect power prior to working on fan.

Delivery Receipt

any visible sign of dam-

• 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.

Personal Safety

Disconnect switches are recommended. Place the
disconnect switch 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.

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 siz e is determined by f an siz e, motor siz e
and position, and the specific location of the installation.

Use the following guidelines to calculate foundation size:

•

The overall dimensions of the f oundation should extend at

least 6 inches beyond the outline of the fan and its motor.

Handling

Lift the fan by the base or lifting eyes.

shaft, motor, windband, or housing.

Never lift by the

Storage

If the fan is stored for any length of time prior to installa­tion, completely fill the bearings with grease or moisture­inhibiting 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.

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.

Note

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.

must be installed on a level surface (leveling should
not be required).

e. 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 f an m ust
be placed 1 fan wheel diameter away from walls and bulk­heads.

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. Elev ate fan to pro vide room to insert isolators between

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

MIN

1 DIA

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

2

Incorrect

Inlet Duct Turns

For ducted inlets, allow at least 3 fan wheel diameters

between duct turns or elbows and the fan inlet.

Correct

Min

3 Dia.

1/4 inch

1 foot

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

100
120

Radial Clearance

Wheel/Inlet Overlap

Overlap

135
150
165
180
195
210
225
245
270
300
330
365
402
445
490
540
600
660
730

5/8”

3/4”

1”

1-1/4”

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 .

Correct

Incorrect Incorrect

Figure 4

Pulley Alignment

Pulley alignment is adjusted by loos­ening the motor pulley setscrew and by
moving the motor pulley on the motor
shaft or by moving the entire motor
along the motor mounting bracket.

Figure 4 illustrates correct and incor-

rect pulley alignment. A recommended
method of inspecting the pulley align­ment is shown in Figure 5 . With the
shorter leg of a car penter’s square or other straight edge
lying along the case of the motor, adjust the position of the
motor pulley (or the motor until the longer leg of the square
is parallel to the belt.

3

Incorrect

Figure 5

Wiring Diagrams

Single Speed, Single Phase Motor

Ground A

L

T-5

Ground B

1
Line
L

2

High Speed

Low Speed

Ground A

L

1

Line

L

2

Link A & B

L

1

Line

L

2

T-1

T-4

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

Ground B

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.

Single Speed, Single Phase, Dual Voltage

Ground A

L

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 V oltage

1

Line

L

2

J-10

Typical Damper Motor Schematic

Wiring Diagrams

3 Phase, 9 Lead Motor
Y-Connection

Low V oltage

208/230 Volts

4

6

5

3

1

9

728

L2L

L

1

3

High Voltage

460 Volts

456

789

3

12

L2L

L

1

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

2 Speed, 2 Winding, 3 Phase

Low Speed

T

3

Low Speed

T

2

Low Speed

T

Motor

To reverse: High Speed-interchange leads T
Low Speed-interchange leads T
line leads.

1

T

11

T

12

T

13

High Speed
High Speed
High Speed

3 Phase, 9 Lead Motor
Delta-Connection

Low V oltage

208/230 Volts

8

7

6

4

1

2

3

and T

1

L

1

. Both Speeds-interchange any 2

2

L

2

Motor

and T

11

L

Low Speed

High Voltage

460 Volts

9
5

3

3

12

789

456

3

12

L1L

L

3

2

L

1

1

L

2

2

L

3

Open

L

1

L

2

L

3

Line

Line

3
4

5
6

.

Fan

Motor

Transformer**

Damper

Motor*

Transformer**

Second
Damper

Motor

L3
L2
L1

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

. For single phase application, disregard L

2

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.

Personal Safety

Disconnect switches are recommended. Place the
disconnect switch 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.

Wiring Installation

All wiring should be in accordance with local ordinances
and the National Electrical Code, NFPA 70. Ensure the
power supply (voltage, frequency, and current carrying
capacity of wires) is in accordance with the motor name­plate.

Lock off all power sources before unit is wired to
power source.

and

. Damper motors may be

3

1

Leave enough slack in the wiring to allow for motor move­ment when adjusting belt tension. Some fractional motors
have to be removed in order to make the connection with
the terminal box at the end of the motor. To remove motor,
remove bolts securing motor base to power assembly. Do
not remove motor mounting bolts.

Follow the wiring diagram in the disconnect switch
and the wiring diagram provided with the motor. Cor­rectly label the circuit on the main power box and
always identify a closed switch to promote safety (i.e.,
red tape over a closed switch).

Wheel Rotation

Test the fan to ensure the rotation of the wheel is
counter-clockwise as viewed from the drive side of the
wheel.

4