Loren Cook CPL Installation Manual

CPL

Centrifugal Plenum Fans

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation

and maintenance instructions for standard units of the

CPL-Centrifugal Plenum Fans

lication 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

CPL

. Carefully read this pub-

, provides additional information

.

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 (if supplied) for free operation of all
moving parts.

• Record on the

age.

Delivery Receipt

any visible sign of dam-

Handling

Lift the fan by the base or lifting eyes on the housing.

Never lift by the shaft, wheel, or motor.

Outdoor Storage

To maintain good working condition of the fan when it is

stored outdoors, follow the additional instructions below.

• Coat the shaft with grease or a rust preventative com­pound.

• Wrap bearings for weather protection.

• Cover the entire fan to prevent the accumulation of dirt
and moisture in the fan.

• Periodically rotate the wheel and operate the dampers
(if supplied).

• Periodically inspect the fan to prevent damaging condi­tions.

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

4.

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.

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
wheel several revolutions every three to five days to keep a
coating of grease on all internal bearing parts.

Store the fan in its original crate and protect it from dust,
debris and the weather.

Lubricants

on page 5). Rotate the

CPL

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 fan and its motor.

Isolation

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 between
this rigid base and the floor.

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.

Isolators

Floor Mounted Spring Isolators

• Mount fan and motor on an isolation base (if supplied).

• Elevate fan (or isolation base) to operating height and
insert blocks to hold in position.

• 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.

• 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.

• Turn lock nut onto leveling bolt and secure firmly in
place against the top of the mounting flange or frame.

• Secure isolators to mounting surface.

Spring Isolator

Figure 1 - Floor Mount Isolators

Rubber-In-Shear Isolator

Floor Mounted Rubber-In-Shear (RIS) Isolators

• Mount fan and motor on an isolation base (if supplied).

• Elevate fan to provide room to insert isolators between
base and foundation or between the fan and foundation
and block in position.

• Position isolators under isolation base or fan and
secure bolts.

• Remove blocks and allow unit to rest on floor. Isolators
must be installed on a level surface (leveling should not
be required).

• 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 bulk­heads. Refer to

figure 2

.

Refer to the CPL catalog for discharge wall proximity fac­tors.

Minimum
1 wheel
diameter

Figure 2 - Non-ducted Inlet Clearance

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 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”

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

Wiring Diagrams

3 Phase, 9 Lead Motor

To reverse, interchange any 2 line leads.

Low Voltage

208/230 Volts

4

6

5

3

1

9

728

L2L

L

1

3

2 Speed, 2 Winding, Single Phase Motor 2 Speed, 1 Winding, 3 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

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

Motor

High Speed

1

Together

2
3

L

4

L

5

6

L

1
2

Line

3

Motor

Single Speed, Single Phase, Dual Voltage 2 Speed, 2 Winding, 3 Phase

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

1

Line

L

2

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

and T

1

. Both Speeds-interchange any 2

2

Typical Damper Motor Schematic

Fan

Motor

Transformer**

Transformer**

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.

. *Damper motors may be

3

High Voltage

460 Volts

456

789

12

L

1

Low Speed

and T

11

and

1

3

L2L

1
2
3

4
5

6

.

12

3

L

1

L

2

L

3

Open

L
L
L

Line

1

2
3

Line

Damper

Motor*

Second
Damper

Motor

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.

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.

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.