Cook Ca series User manual

1CA/CF/CP IO&M B51181-002

CA/CF/CP

Centrifugal Blower

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

Receiving and Inspection

Carefully inspect the fan and accessories for any dam-

age and shortage immediately upon receipt of the fan.

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

bind

• Inspect dampers (if supplied) for free operation of all mov-

ing 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 or housing.

Rotating Parts & Electrical Shock Hazard:

Fans should be installed and serviced by qualied person-

nel only.

Disconnect electric power before working on unit (prior to

removal of guards or entry into access doors).

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 o󰀨, in case of an emer-

gency and in order that maintenance personnel are pro-

vided complete control of the power source.

Grounding is required. All eld-installed wiring must be

completed by qualied personnel. All eld installed wiring

must comply with National Electric Code (NFPA 70) and all

applicable local codes. Ensure the power supply (voltage,

frequency and current carrying capacity of wires) is in ac-

cordance with the motor nameplate.

Fans and blowers create pressure at the discharge and

vacuum at the inlet. This may cause objects to get pulled

into the unit and objects to be propelled rapidly from the

discharge. The discharge should always be directed in a

safe direction and inlets should not be left unguarded. Any

object pulled into the inlet will become a projectile capable

of causing serious injury or death.

When air is allowed to move through a non-powered fan,

the impeller can rotate, which is referred to as windmill-

ing. Windmilling will cause hazardous conditions due to

unexpected rotation of components. Impellers should be

blocked in position or air passages blocked to prevent draft

when working on fans.

Friction and power loss inside rotating components will

cause them to be a potential burn hazard. All components

should be approached with caution and/or allowed to cool

before contacting them for maintenance.

Under certain lighting conditions, rotating components

may appear stationary. Components should be veried to

be stationary in a safe manner, before they come into con-

tact with personnel, tools or clothing.

Failure to follow these instructions could result in death or

serious injury.

The attachment of roof mounted fans to the roof curb as

well as the attachment of roof curbs to the building struc-

ture must exceed the structural requirements based on the

environmental loading derived from the applicable build-

ing code for the site. The local code o󰀩cial may require

variations from the recognized code based on local data.

The licensed engineer of record will be responsible for pre-

scribing the correct attachment based on construction ma-

terials, code requirements and environmental e󰀨ects spe-

cic to the installation.

This publication contains the installation, operation and

maintenance instructions for standard units of the CA, CF,

and CP: Centrifugal Blowers.

• CA/CF SWSI

• CA-4 SWSI

• CA DWDI

• CA-4 DWDI

• CPFD

• CPFB

• CAF-DW

• CPA/CPA-A/CPS/

CPS-A/CPV

Carefully read this publication and any

supplemental documents prior to any

installation or maintenance procedure.

Loren Cook catalogs, CA/CF and CP, provide additional

information describing the equipment, fan performance,

available accessories and specication data.

For additional safety information, refer to AMCA Publi-

cation 410-96, Safety Practices for Users and Installers of

Industrial and Commercial Fans.

All of the publications listed above can be obtained from:

• lorencook.com

• [email protected]

• 417-869-6474 ext. 166

For information and instructions on special equipment,

contact Loren Cook Company at 417-869-6474.

CA SWSI Shown

2CA/CF/CP IO&M B51181-002

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

Isolators

NOTICE! Under no circumstance is the fan to be

mounted inverted and hung by its base angles.

1. Mount fan on isolation base or rails.

2. Elevate fan to operating height and brace.

3. Attach threaded rod to overhead support structure di-

rectly above each mounting hole. Rod should extend

to within a few feet of fan.

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

each side of isolator bracket.

5. Insert another section of threaded rod through the fan

mounting hole and isolator.

6. Attach two nuts to threaded rod isolator.

7. Place adjusting nut and locking nut on threaded rod

near fan mounting bracket.

8. 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 Rubber-in-Shear Ceiling Isolator

Figure 1- Ceiling Mount Isolators

Floor Mounted Spring Isolators

1. Mount fan and motor on isolation base or rails (if

supplied).

2. Elevate fan (or isolation base/rails) to operating height

and insert blocks to hold in position.

3. Position isolators under the fan (or isolation base/rails)

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 iso-

lators and the fan raises uniformly o󰀨 the blocks. Then

remove the blocks.

5. Turn lock nut onto leveling bolt and secure rmly in

place against the top of the mounting ange or frame.

6. Secure isolators to mounting surface.

Spring Isolator Rubber-in-Shear Isolator

Figure 2- Floor Mount Isolators

Floor Mounted Rubber-In-Shear (RIS) Isolators

1. Mount fan and motor on isolation base or rails (if

supplied).

2. Elevate fan (or isolation base/rails) to provide room to

insert isolators between the base and foundation and

block in position.

Storage

If the fan is stored for any length of time prior to installa-

tion, completely ll the bearings with grease or moisture-

inhibiting oil (refer to Lubrication, pages 6–7). Rotate the

wheel several revolutions every three to ve 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 weather.

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 inlet and outlet to prevent the accumulation of

dirt and moisture in the housing

• Periodically rotate the wheel and operate dampers (if

supplied)

• Periodically inspect the unit to prevent damaging

conditions

Installation

Motor Installation

Most motors are shipped mounted on the fans with

belts and drives installed. However, extremely heavy mo-

tors and drives are shipped separately. These motors and

drives will require eld installation.

Foundation

This fan requires a strong, level foundation of reinforced

poured concrete. A correctly designed concrete founda-

tion provides the best means for mounting oor units. The

foundation’s size is determined by fan size and arrange-

ment, motor size and position and the specic 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 unit 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

To prevent vibration and noise from being transferred to

the building isolators are recommended. Arrangement 1, 2

and 3 (CA or CF) fans require an isolation base to e󰀨ec-

tively isolate the fan system which includes the fan, base,

motor, drive, guards, etc. Bases must have su󰀩cient ri-

gidity to resist belt pull and prevent drive distortion which

can lead to excessive belt and bearing wear; its perim-

eter should contain all base angles and rotating parts. Ar-

rangement 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 load-

ing caused by the motors and drives. Isolators should be

located between the fan system and the support structure.

3CA/CF/CP IO&M B51181-002

Discharge Duct Turns

Make sure that duct turns located near the fan discharge

curve in the direction of the fan’s rotation.

Discharge Duct Turns

Correct

MIN 3

DIA

Incorrect

CP with Optional Curb Cap and Inlet Box

NOTICE! UL 762/NFPA96 and local codes may dic-

tate additional or modications to this installation.

The installation diagram below has a solid curb cap

duct adapter placed over the top of the curb. The welded

grease duct with recommended transition is either welded

or sealed with UL recognized re caulk to both the curb

cap duct adapter and the bottom of the fan. A minimum

of two separate outlines of caulk is recommended at the

outer portion of the curb cap duct adapter.

Wheel-to-Inlet Clearance

The correct wheel-to-inlet clearance is critical to proper

fan performance. This clearance should be veried before

initial start-up since rough handling during shipment could

cause a shift in fan components. Refer to the wheel/inlet

drawing 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.

CA, CF and CP

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”

OVERLAP

RADIAL

CLEARANCE

WHEEL SHROUD

INLET

CPFD, CPFB

Size Gap/Clearance

100 - 150 1/4

180 3/16

220 1/2

250 - 300 3/4

CLEARANCE

3. Position isolators under fan (or isolation base/rails)

and secure bolts.

4. Remove blocks and allow fan to rest on oor. Isolators

must be installed on a level surface (leveling should

not be required).

5. Secure isolators to mounting surface.

Duct Installation

E󰀩cient fan performance relies on the proper installa-

tion of inlet and discharge ducts. Be sure your fan con-

forms 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 bulk-

heads. An inlet bell should be used in this case.

Non-Ducted Inlet Clearance

MIN 1 DIA

Free Discharge

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

lost e󰀩ciency because it doesn’t allow for a static regain.

Correct Incorrect

Free Discharge

Inlet Duct Turns

For ducted inlets, allow at least 3 fan wheel diameters

between duct turns or elbows and the fan inlet.

Correct

Incorrect

Inlet Duct Turns

MIN 3

DIA

4CA/CF/CP IO&M B51181-002

Belt and Pulley Installation

Belt tension is determined by the sound the belts make when

the fan is rst 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 e󰀩ciency and possible

damage can occur.

Do not change the pulley pitch diameter to change ten-

sion. This will result in a di󰀨erent fan speed.

1. Loosen motor plate adjustment bolts and move motor 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.

2. Slide the motor plate back until proper tension is reached.

For proper tension, a deection of approximately 1/4” per

foot of center distance should be obtained by rmly press-

ing the belt. Refer to Figure 1.

3. Lock the motor plate adjustment bolts in place.

4. Ensure pulleys are properly aligned. Refer to Figure 2.

Tolerance

Center

Distance

Max.

Gap

Up through 12” 1/16”

12” through 48” 1/8”

Over 48” 1/4”

Figure 2

OFFSET ANGULAR OFFSET/ANGULAR

CENTER

DISTANCE

(CD)

GAP GAP

Pulley Alignment

Pulley alignment is adjusted by loos-

ening the motor pulley setscrew and by

moving the motor pulley on the motor

shaft.

Figure 2 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 al-

lowable gap must be adjusted by half of the di󰀨erence in width

(as shown in A & B of Figure 2). Figure 3 illustrates using a car-

penter’s square to adjust the position of the motor pulley until

the belt is parallel to the longer leg of the square.

Final Installation Steps

1. Inspect fasteners and setscrews, particularly fan mounting

and bearing fasteners, and tighten according to the table,

Recommended Torque for Setscrews/Bolts.

2. Inspect for correct voltage with voltmeter.

3. Ensure all accessories are installed.

CAF-DW

Size Overlap

120 1/8”

135–165 5/32”

180 1/4”

195 5/32”

210 1/4”

225 5/32”

245 9/32”

270–445 1/4”

490 17/32”

540–600 27/32”

660–730 25/32”

WHEEL SHROUD

OVERLAP OVERLAP

INLET

RADIAL

CLEARANCE

RADIAL

CLEARANCE

INLET

Wiring Installation

Leave enough slack in the wiring to allow for motor move-

ment 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.

Units with Arrangement 10 have a hole provided at the

base of the bearing pedestal to accommodate wiring.

NOTICE! Follow the wiring diagram in the discon-

nect 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 the

same as indicated by the arrow marked Rotation.

Airfoil Backward Inclined Forward Curved

115 and 230 Single Phase Motors

Fan wheel rotation is set correctly at the factory. Chang-

ing the rotation of this type of motor should only be at-

tempted by a qualied electrician.

208, 230 and 460 3 Phase Motors

These motors are electrically reversible by switching two

of the supply leads. For this reason, the rotation of the fan

cannot be restricted to one direction at the factory. See

Wiring Diagrams, page 5, for specic information on re-

versing wheel direction.

NOTICE! Do not allow the fan to run in the wrong

direction. This will overheat the motor and cause

serious damage. For 3-phase motors, if the fan is

running in the wrong direction, check the control

switch. It is possible to interchange two leads at

this location so that the fan is operating in the cor-

rect direction.

1 foot

1/4 inch

Figure 1

5CA/CF/CP IO&M B51181-002

Recommended Torque for Setscrews/Bolts (IN-LB)

Setscrews Hold Down Bolts

Size

Key Hex

Across

Flats

Recommended

Torque Size Recommended

Torque

Min. Max.

#8 5/64” 15 21 3/8”-16 324

#10 3/32” 27 33 1/2”-13 780

1/4 1/8” 70 80 5/8 ”-11 1440

5/16 5/32” 140 160 3/4”-10 2400

3/8 3/16” 250 290 7/8”-9 1920

7/16 7/32” 355 405 1”-8 2700

1/2 1/4” 560 640 1-1/8”-7 4200

5/8 5/16” 1120 1280 1-1/4”-7 6000

3/4 3/8” 1680 1920 - -

7/8 1/2” 4200 4800 - -

19/16” 5600 6400 - -

Operation

Pre-Start Checks

1. Lock out all the primary and secondary power sources.

2. Ensure fasteners and setscrews, particularly those used for

mounting the fan, are tightened.

3. Inspect belt tension and pulley alignment.

4. Inspect motor wiring.

5. Ensure belt touches only the pulleys.

6. Ensure fan and ductwork are clean and free of debris.

7. Inspect wheel-to-inlet clearance. The correct wheel-to-inlet

clearance is critical to proper fan performance.

8. Close and secure all access doors.

9. Restore power to fan.

Start-Up

Turn on the fan. In variable speed units, set fan to its low-

est speed and inspect for the following:

• Direction of rotation

• Excessive vibration

• Unusual noise

• Bearing noise

• Improper belt alignment or tension (listen for squealing)

• Improper motor amperage or voltage

NOTICE! If a problem is discovered, immediately shut

o the fan. Lock out all electrical power and check for

the cause of the trouble. Refer to Troubleshooting.

Wiring Dagrams

Vari-Flow

For EC or VF see EC Motor Wiring supplement. For VF2 see

PM wiring supplement.

Single Speed, Single Phase Motor

T-

Ground B

Ground A

Line

When ground is required, attach to ground A or B with No. 6

thread forming screw. To reverse, interchange T-1 and T-4.

2 Speed, 2 Winding, Single Phase Motor

Ground A

Ground B

T-1

T-

Low Speed

High Speed

Line

When ground is 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 B

J-10

T-5

Ground A

Link A

Link B

Low Voltage

Line

Ground A

Link A

and B

Line

Ground B

T-5

J-10

When ground is required, attach to ground A or B with No. 6

thread forming screw. To reverse, interchange T-5 and J-10 leads.

3 Phase, 9 Lead Motor

456

L1L2L3

456

789

12 3

L1L2L3

Low Voltage

208/230 Volts

High Voltage

460 Volts

3 Phase, 9 Lead Motor

Y-Connection

6789

456

12 3

Low Voltage

208/230 V

olts

High V

oltage

460 Volts

L1L3

3 Phase, 9 Lead Motor

Delta-Connection

To reverse, interchange any two line leads.

2 Speed, 1 Winding, 3 Phase Motor

Motor

Together

High Speed

Line

Open

Low Speed

Line

Motor

To reverse, interchange any two line leads. Motors require mag-

netic control.

2 Speed, 2 Winding, 3 Phase

Low Speed

High Speed

Motor

Line

To reverse:

High Speed - interchange leads T11 and T12.

Low Speed - interchange leads T1and T2.

Both Speeds - interchange any two line leads.

Typical Damper Motor Schematic

Fan

Motor

Damper

Motor*

Second

Damper

Motor

ansformer** Transformer*

For 3-Phase, damper motor voltage should be the same be-

tween L1and L2. For single phase application, disregard L3.

*Damper motors may be available in 115, 230 or 460 volt mod-

els. The damper motor nameplate voltage should be veried pri-

or to connection.

**A transformer may be provided in some installations to correct

the damper motor voltage to the specied voltage.

6CA/CF/CP IO&M B51181-002

the control arm. As the variable inlet vanes close, the entering

air should spin in the same direction as the wheel

• Inspect springs and rubber isolators for deterioration and re-

place as needed

• Inspect for cleanliness. Clean exterior surfaces only. Removing

dust and grease on motor housing assures proper motor cool-

ing. Removing dirt from the wheel and housing prevent imbal-

ance and damage

Lubrication

Fan Bearings

Greasable fan bearings are lubricated through a grease

tting on the bearing.

Lubrication Conditions Chart

Fan Class Fan Status Shaft Size Maximum Interval

(operation hrs)

Centrifugal

Blower

Class I

Normal Conditions

(clean, dry & smooth)

>1-1/2” 10,000

<1-1/2” 2,000

Extreme Conditions

(dirty/wet/rough)

>1-1/2” 2,000

<1-1/2” 400

Centrifugal

Blower

Class II

Normal Conditions

(clean, dry & smooth)

>2” 7500

<2” 1000

Extreme Conditions

(dirty/wet/rough)

>2” 1500

<2” 200

Centrifugal

Blower

Class III

Normal Conditions

(clean, dry & smooth)

>2” 3000

<2” 500

Extreme Conditions

(dirty/wet/rough)

>2” 500

<2” 1000

Exceptions to the greasing interval chart:

• Periodic Applications (any break of one week or

more): it is recommended that full lubrication be per-

formed prior to each break in operation

• Higher Temperature: it is recommended to halve the in-

tervals for every 30°F increase in operating temperature

above 120°F not to exceed 230°F for standard bearings;

high temperature bearings (optional) can operate up to

400°F

• Vertical Shaft: it is recommended that the intervals

should be halved.

For best results, lubricate the bearing while the fan is in

operation. Pump grease in slowly until a slight bead forms

around the bearing seals. Excessive grease can burst

seals thus reducing bearing life.

Before lubricating, the grease nipple and immediate

vicinity should be thoroughly cleaned without the use of

high pressure equipment. The grease should be supplied

slowly as the bearing rotates until fresh grease slips past

the seal. Excessive pressure should be avoided to prevent

seal damage.

In the event the bearing cannot be seen, use no more

than three injections with a hand-operated grease gun.

NOTICE! Loren Cook Company uses petroleum

lubricant in a lithium base. Other types of grease

should not be used unless the bearings and lines

have been ushed clean. If another type of grease

is used, it should be a lithium-based grease con-

forming to NLGI grade 2 consistency. An NLGI

grade 2 grease is a light viscosity, low-torque,

rust-inhibiting lubricant that is water resistant. Its

temperature range is from -30°F to +200°F and ca-

pable of intermittent highs of +250°F. For temper-

atures above 250°F Mobiltemp SHC 32 is recom-

mended.

Use of Variable Frequency Drives

Motors

Motors that are to be operated using a Variable

Frequency Drive (VFD) must be VFD compatible. 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

consulted for recommended line impedance and usage of

line reactors or lters if the lead length between the VFD

and the motor exceeds 10 ft (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 fre-

quencies 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.

Inspection

Inspection of the fan should be conducted at the rst 30

minute, 8 hour and 24 hour intervals of satisfactory op-

eration. During the inspections, stop the fan and inspect

as per the Conditions Chart.

30 Minute Interval

Inspect bolts, setscrews and motor mounting bolts. Ad-

just and tighten as necessary.

8 Hour Interval

Inspect belt alignment and tension. Adjust and tighten

as necessary.

24 Hour Interval

Inspect belt tension, bolts, setscrews and motor mount-

ing bolts. Adjust and tighten as necessary.

Maintenance

Establish a schedule for inspecting all parts of the fan. The fre-

quency of inspection depends on the operating conditions and

location of the fan.

Inspect fans exhausting corrosive or contaminated air within

the rst month of operation. Fans exhausting contaminated air

(airborne abrasives) should be inspected every three months.

Regular inspections are recommended for fans exhausting

non-contaminated air.

It is recommended the following inspections be conduct-

ed twice per year:

• Inspect bolts and setscrews for tightness. Tighten as neces-

sary. Worn setscrews should be replaced immediately

• Inspect belt wear and alignment. Replace worn belts with new

belts and adjust alignment as needed. Refer to Belt and Pulley

Installation

• Bearings should be inspected as recommended in the Lubrica-

tion Conditions Chart

• Inspect variable inlet vanes for freedom of operation and exces-

sive wear. The vane position should agree with the position of

7CA/CF/CP IO&M B51181-002

Motor Bearings

Motors are provided with prelubricated bearings. Any lubrica-

tion instructions shown on the motor nameplate supersede in-

structions below. Motor bearings without provisions for relubri-

cation will operate up to 10 years under normal conditions with

no maintenance. In severe applications, high temperatures or

excessive contaminates, it is advisable to have the maintenance

department disassemble and lubricate the bearings after three

years of operation to prevent interruption of service.

For motors with provisions for relubrication, follow intervals of

the table below.

Relubrication Intervals

Service

Conditions

Nema Frame Size

Up to and

Including 184T 213T-365T 404T and Larger

1800

RPM &

Less

Over

1800

RPM

1800

RPM &

Less

Over

1800

RPM

1800

RPM &

Less

Over

1800

RPM

Standard 3 yrs. 6 months 2 yrs. 6 months 1 yr. 3 months

Severe 1 yr. 3 months 1 yr. 3 months 6 months 1 month

Motors are provided with a polyurea mineral oil NGLI #2 grease.

All additions to the motor bearings are to be with a compatible

grease such as Exxon Mobil Polyrex EM and Chevron SRI.

The above intervals should be reduced to half for vertical shaft

installations.

Motor Services

Should the motor prove defective within a one-year pe-

riod, contact your local Loren Cook representative or your

nearest authorized electric motor service representative.

Changing Shaft Speed

All belt driven fans with motors up to and including 5HP

(184T max) are equipped with variable pitch pulleys. To

change the fan speed, perform the following:

1. Loosen setscrew on driver (motor) pulley and remove key,

if equipped.

2. Turn the pulley rim to open or close the groove facing. If

the pulley has multiple grooves, all must be adjusted to the

same width.

3. After adjustment, inspect for proper belt tension.

Speed Reduction

Open the pulley in order that the belt rides deeper in the

groove (smaller pitch diameter).

Speed Increase

Close the pulley in order that the belt rides higher in the

groove (larger pitch diameter). Ensure that the RPM lim-

its of the fan and the horsepower limits of the motor are

maintained.

Maximum RPM

CA SWSI, CPS-A, CPA-A

Size Max. RPM

Class I Class II Class III

120 3348 4368 5503

135 2976 3883 4892

150 2678 3494 4403

165 2435 3177 4002

180 2114 2757 3474

195 1951 2545 3207

210 1812 2363 2978

225 1691 2206 2779

245 1553 2026 2553

270 1419 1851 2332

300 1277 1666 2099

330 1161 1514 1908

365 1064 1388 1749

402 965 1259 1586

445 873 113 8 1434

490 793 1034 1303

540 719 938 1182

600 647 844 1094

660 588 768 967

730 532 694 874

CA and CAF DWDI

Size Max. RPM

Class I Class II Class III

120 3714 4846 6105

135 3307 4315 5436

150 2575 3357 4230

165 2374 3095 3901

180 2176 2839 3577

195 2009 2621 3302

210 1865 2434 3066

225 1741 2271 2862

245 1631 2128 2681

270 1443 1883 2372

300 1262 1647 2074

330 1147 1496 1885

365 1038 1354 1706

402 941 1228 1547

445 851 1110 1399

490 773 1009 1271

540 702 916 116 4

600 631 823 1037

660 574 749 944

730 519 677 853

CF SWSI, CPS, CPA

Size Max. RPM

Class I Class II Class III

60-100* 4230 5519 6953

120 3404 4441 5595

135 3026 3948 4974

150 2723 3553 4476

165 2476 3230 4069

180 2269 2961 3730

195 2095 2733 3443

210 1795 2341 2950

225 1675 2185 2753

245 1539 2007 2529

300 1257 1639 2065

330 1142 1490 1877

365 1023 1334 1681

402 939 1225 1543

445 849 110 8 1396

490 771 1006 1268

540 700 913 1150

600 630 822 1035

660 573 747 941

730 518 675 851

*Sizes 60 through 100 only applies to

CPS and CPA.

CPV

Size Max. RPM

Standard Reinforced

60-100* 2719

120 2527

135 2093

150 2035

165 1766

180 1588

195 1429 1571

210 1277 1407

225 1152 1265

245 1015 1260

270 876 1091

300 837 1006

330 716 869

365 624 805

402 539 701

445 463 660

490 360 576

RPM Derating Factor

Temperature

(°F)

RPM Factor

Steel Aluminum

70 1.00 1.00

200 0.98 0.93

300 0.96 0.79

400 0.94

500 0.91

600 0.87

700 0.81

800 0.75

For elevated airstream temperatures, the maximum fan speed limits

must be derated by the factors above.

Pulley and Belt Replacement

1. Remove pulleys from their respective shafts.

2. Clean the motor and fan shafts.

3. Clean bores of pulleys and coat the bores with heavy oil.

4. Remove grease, rust or burrs from the pulleys and

shafts.

5. Remove burrs from shaft by sanding.

6. Place fan pulley on fan shaft and motor pulley on its

shaft. Damage to the pulleys can occur when exces-

sive force is used in placing the pulleys on their re-

spective shafts.

7. Tighten in place.

8. Install belts on pulleys and align as described in Belt

and Pulley Installation.

Bearing Replacement

The fan bearings are pillow block ball bearings.

An emery cloth or le may be needed to remove imper-

fections in the shaft left by the setscrews.

For Arrangement 1, 2, 9 and 10:

1. Mark the position on the shaft of both bearing races, set-

screws, and the wheel and pulley. Mark the location and

orientation of the inlet cone. Note the clearance between

the wheel and inlet cone.

2. Remove the fan pulley and inlet cone.

3. Remove the wheel from the shaft. A 2-jaw puller may be

needed.

4. Remove bearing hold-down bolts. Remove shaft and

bearings as one unit.

5. Remove the anti-corrosion coating from the shaft with a

suitable degreaser.

6. Remove the bearing from the shaft using a bearing pull-

er. If a bearing puller is not available, tap on the bearing

with a wood block and hammer to remove it.

7. Smooth and clean the shaft and bearing bore thoroughly.

**Aluminum wheels are

not available above 300°.

8CA/CF/CP IO&M B51181-002

17. Adjust the belt tension.

18. Test run and retighten all setscrews and bolts; trim bal-

ance as necessary (.0785 in/sec max.).

After 24 hours of operation, retighten the setscrews to the ap-

propriate torque. This assures full locking of the inner race to

the shaft. Make sure the socket key or driver is in good con-

dition with no rounded corners. The key should be fully en-

gaged in the setscrew and held squarely to prevent rounding

out of the setscrew socket when applying maximum torque.

Troubleshooting

Problem and Potential Cause

Low Capacity or Pressure:

• Incorrect direction of rotation. Make sure the fan rotates

in same direction as the arrows on the motor or belt drive

assembly

• Poor fan inlet conditions. There should be a straight clear

duct at the inlet

• Improper wheel alignment

Excessive Vibration and Noise:

• Damaged or unbalanced wheel

• Belts too loose; worn or oily belts

• Speed too high

• Incorrect direction of rotation. Make sure the fan rotates

in same direction as the arrows on the motor or belt drive

assembly

• Bearings need lubrication or replacement

• Fan surge or incorrect inlet or outlet conditions

Overheated Motor:

• Motor improperly wired

• Incorrect direction of rotation. Make sure the fan rotates

in same direction as the arrows on the motor or belt drive

assembly

• Cooling air diverted or blocked

• Improper inlet clearance

• Incorrect fan RPMs

• Incorrect voltage

Overheated Bearings:

• Improper bearing lubrication

• Excessive belt tension

8. Place the bearings into position making sure they are not

on a worn section of the shaft. Tapping the inner ring face

with a soft driver may be required.

NOTICE! Do not hammer the bearing housing.

9. The outer ring of the bearing is spherical and swivels

in the housing to compensate for misalignment. Secure

hold-down bolts, but do not fully tighten.

10. Align the setscrews on the bearings and tighten one set-

screw on each bearing.

11. Rotate the shaft to allow the bearing outer rings to nd

their center of free movement.

12. Install the wheel on the shaft. Install the inlet cone in its

original location. And adjust bearing position and inlet

cone to center the wheel in the inlet cone.

13. Tighten hold-down bolts to proper torque.

14. Turn the shaft by hand. Resistance should be the same

as it was before hold-down bolts were fully tightened.

15. Tighten bearing setscrews to specied torque. Refer to

the Recommended Torque chart.

16. Re-install the pulley and adjust the belt tension.

17. Test run and retighten all setscrews and bolts; trim bal-

ance as necessary (.0785 in/sec max.).

After 24 hours of operation, retighten the setscrews to the ap-

propriate torque. This assures full locking of the inner race to

the shaft. Make sure the socket key or driver is in good con-

dition with no rounded corners. The key should be fully en-

gaged in the setscrew and held squarely to prevent rounding

out of the setscrew socket when applying maximum torque.

For Arrangement 3:

Bearings should be replaced individually for each side

of fan.

1. Loosen and remove belts.

2. If replacing drive side bearing, mark location of pulley

and then remove.

3. Mark bearing location on bearing support and loosen

bearing hold down bolts.

4. Support shaft to remove weight from bearing.

5. Remove anti-corrosion coating from the shaft with a suit-

able de-greaser.

6. Remove bearing from the shaft using a bearing puller. If

a bearing puller is not available, tap on the bearing with a

wood block and hammer to remove it.

7. Smooth and clean the shaft and bearing bore thoroughly.

8. Place the bearing into position making sure it is not on

a worn section of the shaft. Tapping the inner ring face

with a soft driver may be required. Do not hammer on the

housing.

9. The outer ring of the bearing is spherical and swivels

in the housing to compensate for misalignment. Secure

hold-down bolts, but do not fully tighten.

10. Align setscrews on the bearings and tighten one set-

screw on bearing.

11. Rotate the shaft to allow the bearing outer ring to nd its

center of free movement.

12. Tighten hold-down bolts to proper torque. Refer to Rec-

ommended Torque chart.

13. Turn the shaft by hand. Resistance should be the same

as it was before hold-down bolts were fully tightened.

14. Tighten bearing setscrews to specied torque.

15. Re-install the pulley if required.

16. Repeat process for opposite bearing.

9CA/CF/CP IO&M B51181-002

Inlet Side View

Drive Side View

910

Discharge Side View

Drive Side View Discharge Side View Inlet Side View

Part No. Arr. 10, CA-4 SWSI, CF-4 SWSI Arr. 4

1Motor Plate -

2Motor

3Motor Sheave -

4Belt Set -

5Fan Sheave -

6Housing

7 - Isolation Base (optional)

8Shaft -

9Outboard Bearing -

10 Inboard Bearing -

11 Wheel

12 Inlet Cone

CA, CF SWSI Arrangement 10

CA-4 SWSI, CF-4 SWSI

CA, CF SWSI Arrangement 4

Drive Side View

Discharge Side View

Inlet Side View

Discharge Side View

8910

Drive Side View Discharge Side View Inlet Side View

Part No. Arr. 1 Arr. 3 Arr. 9

1Motor Slide Base

2Motor

3Motor Sheave

4Belt Set

5Fan Sheave

6Housing

7Isolation Base (optional) -

8Shaft

9Outboard Bearing Drive Side Bearing Outboard Bearing

10 Inboard Bearing Free Side Bearing Inboard Bearing

11 Wheel

12 Inlet Cone

13 -Free Side Bearing Support -

14 -Drive Side Bearing Support -

Parts List

CA,CF SWSI Arrangement 1

CA, CF SWSI Arrangement 3

CA, CF SWSI Arrangement 9

10CA/CF/CP IO&M B51181-002

CA DWDI

Drive Side View Free Side View Discharge Side View

CA-4 DWDI

Drive Side View Free Side View Dischar

e Side View

CAF-DWDI

Drive Side View Free Side View Discharge Side View

Part No. CA DWDI CAF-DW CA-4 DWDI

1Motor Slide Base

2Motor

3Motor Sheave

4Belt Set

5Fan Sheave

6Housing

7Isolation Base (optional)

8Shaft

9Drive Side Bearing

10 Free Side Bearing

11 Wheel/Wheel Assembly

12 Inlet Cone

13 Free Side Bearing Support

14 Drive Side Bearing Support

11CA/CF/CP IO&M B51181-002

CPFB

Drive Side View Discharge Side View Inlet Side View

10 15

13 16

CPA, CPA-A, CPS, CPS-A CPV

2 3

Drive Side View Discharge Side View Inlet Side View

10 15

16 17

CPA, CPA-A, CPS, CPS-A, CPV with Original Curb Cap and Inlet Box Accessory

Side View Inlet Side View

Part No. CPA, CPA-A, CPS, CPS-A, CPV with Optional Curb

Cap and Inlet Box Accessory Parts List

1CP Vent Set

2Adjustable Draw Latch

3Access Door Assembly

4Latch Keeper

5Curb Cap/Plenum Box Assembly

6Foam Tape (not shown)

Part No. CPFB, CPA, CPA-A, CPS,

CPS-A, CPV Arr. 4

1Motor Plate

2Motor

3Motor Sheave

4Belt Set

5Fan Sheave

6Housing

7Shaft

8Outboard Bearing

9Inboard Bearing

10 Wheel

11 Inlet Cone

12 Pedestal

13 Optional Side Cover (2)

14 Optional Weather Cover

15 Discharge Flange

16 Spreader Bar (2)

17 Inlet Side Support

12CA/CF/CP IO&M B51181-002

Limited Warranty

Loren Cook Company warrants that your Loren Cook fan was manufactured free of defects in materials and workmanship, to the extent stated herein.

For a period of one (1) year after date of shipment, we will replace any parts found to be defective without charge, except for shipping costs which will be

paid by you. This warranty is granted only to the original purchaser placing the fan in service. This warranty is void if the fan or any part thereof has been

altered or modied from its original design or has been abused, misused, damaged or is in worn condition or if the fan has been used other than for the

uses described in the company manual. This warranty does not cover defects resulting from normal wear and tear. To make a warranty claim, notify Loren

Cook Company, General O󰀩ces, 2015 East Dale Street, Springeld, Missouri 65803-4637, explaining in writing, in detail, your complaint and referring to

the specic model and serial numbers of your fan. Upon receipt by Loren Cook Company of your written complaint, you will be notied, within thirty (30)

days of our receipt of your complaint, in writing, as to the manner in which your claim will be handled. If you are entitled to warranty relief, a warranty ad-

justment will be completed within sixty (60) business days of the receipt of your written complaint by Loren Cook Company. This warranty gives only the

original purchaser placing the fan in service specically the right. You may have other legal rights which vary from state to state. For fans provided with