Loren Cook AVA Installation Manual

Page 1

VA/AVA/AF

Vane Axial Inline Blowers

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation and maintenance instructions for standard units of the VA/AVA/AF- Vane Axial Inline Blowers.

• VAD/VAB/VAHB • AVAD/AVAB

• AFB-C/AFBV-C • AFB-H/AFBV-H

• AFB-S/AFBV-S • AFD-C/AFDV-C

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

Loren Cook catalog, VA/AVA/AF, 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 (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.

Receiving and Inspection

Carefully inspect the fan and accessories for any damage and shortage immediately upon receipt of the fan.

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

• Record on the Delivery Receipt any visible sign of damage.

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.

Outdoor Storage

To maintain good working condition of a Vane Axial 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 prop and operate dampers (if supplied) to keep a coating of grease on all internal bearing parts.

• Periodically inspect the unit 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

To prevent damage to the fan during shipping, motors 25 HP and larger, and extremely heavy motors (cast iron or severe duty) are shipped loose and must be field mounted by bolting the motor on the motor mounting plate in the existing mounting slots.

Handling

Handle your equipment with care. Some fans are provided with lifting lugs or holes for easy handling. Others must be handled using nylon straps or well-padded chains and cables which protect the fan’s coating and housing. Spreader bars should be used when lifting large parts.

Axial fans should be lifted by using straps around the fan housing only. DO NOT LIFT AXIAL FANS BY THE MOTOR, MOTOR BASE, PROP OR FLANGES.

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 installa-

tion, completely fill the bearings with grease or moisture-

VAD

Page 2

Note

Extreme vibration is a serious problem that may cause structural and mechanical failure. To help vibration and noise from being transferred to the building, isolators are recommended.

Isolation Installation

Floor Mounted Spring Isolators

a. Mount fan and motor on unitary 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 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 one fan wheel diameter away from walls and bulkheads.

MIN

1 DIA

Spring Isolator

Figure 1 -Floor Mount Isolators

Rubber-In-Shear Isolator

Floor Mounted Rubber-In-Shear (RIS) Isolators

a. Mount fan and motor on a unitary isolation base (if sup-

plied).

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.

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 location

until the fan weight is uniformly transferred to the isolators. Remove bracing.

Non-ducted Inlet Clearance

Incorrect

Fan

Inlet Bell

Air Flow

Min

1 Dia.

Correct

Fan

Inlet Bell

Air Flow

Inlet Bell

Free Discharge

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

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

Incorrect

Fan

Inlet Bell

Air Flow

Min

1 Dia.

Correct

Fan

Inlet Bell

Air Flow

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

Min 3

Dia

Incorrect

Inlet Duct Turns

Page 3

Discharge Duct Turns

1 foot

1/4 inch

When possible, allow 3 duct diameters between duct turns or elbows and the fan outlet. Refer to the drawings at the top of page 3.

Correct

MIN

3 DIA

Incorrect

Correct

Incorrect Incorrect

Incorrect

Discharge Duct Turns

Correct Incorrect

Small

Duct

Diverging Inlet Cone

Air Flow

Fan

Inlet Cone

Large Duct

Small

Duct

Inlet

Air Flow

Fan

Large Duct

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.

a. Loosen motor plate adjustment bolts 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.

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 incorrect pulley alignment. A recommended method of inspecting the pulley alignment is shown in Figure 5. With the shorter leg of a carpenter’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.

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.

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).

Figure 5

Figure 3

Page 4

Wiring Diagrams

Single Speed, Single Phase Motor

Ground A

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.

Line

Wiring Diagrams

3 Phase, 9 Lead Motor

3 Phase, 9 Lead Motor Y-Connection

Low Voltage

208/230 Volts

728

L2L

To reverse, interchange any 2 line leads.

High Voltage

460 Volts

456

3 9

789

L2L

3 Phase, 9 Lead Motor Delta-Connection

Low Voltage

208/230 Volts

7 6

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

Low Speed

Line

Together

Motor

4 5 6

Line

Motor

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

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

Ground A

T-5

J-10

Ground B

Link A

Link B

Low Voltage

Line

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.

Ground A

Link A & B

High Voltage

Low Speed

Line

Motor

T T T

Low Speed

High Speed High Speed High Speed

To reverse: High Speed-interchange leads T11 and T12. Low Speed-interchange leads T line leads.

and T2. Both Speeds-interchange any 2

Typical Fan Motor/Damper Motor Schematic

High Voltage

460 Volts

8 4 2

L3L

789

5 3

456

L1L

Low SpeedHigh Speed

2 3

Line

Open

5 6

Line

Fan

Motor

Transformer**

Damper

Motor*

Second Damper

Motor

L3 L2 L1

Transformer**

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

. 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.

Page 5

Prop Concerns

Instructions for adjusting blade angle setting on adjust-

able pitch Vane Axial Inline Blowers (AVA).

Note: Verify that the fan at the new pitch does not

operate at a critical speed, (RPM), see page 7.

Warning: The maximum safe blade angle setting for this fan is shown on the decal located inside the hub cover.

a. Disconnect power supply. b. Remove hub cover. c. Placing a bubble protractor on the flat machined sur-

face on the discharge side of the hub, take an initial reading, when setting the blade to the desired angle, (no greater than 40°) remember to allow for the angle at which the fan is installed, as indicated by the is initial reading.

d. Adjust each blade individually as follows (note that one person should hold and adjust the blade while another tightens the nuts).

e. Replace hub cover. f. Reconnect power supply.

1. Place blade in 3 o’clock or 9 o’clock position.

2. Loosen retaining nut on blade bolt.

3. Postition bubble protractor on the face (discharge side) of the blade at the indicated line. If the line is not visible, position protractor on a line perpendicular to the blade center line, and 30% of the wheel radius in from the tip on 39”, 49”, 63” and 79” fans (22% On 35”, 44”, 55” and 71” fans).

4. Set blade to desired angle, correcting for angle of installation.

5. Tighten nut so that blade is snug.

6. Recheck blade angle. If blade has shifted, tap blade near hub with soft mallet to correct.

7. Tighten nut to tabulate torque:

Bolt Size

Minimum Maximum

5/8” 40 110 3/4” 140 190 7/8” 265 350

1” 450 550

Torque (Ft. Lbs.)

8. Rotate wheel to bring next blade into same position and repeat steps 1-8 until all blades are adjusted.

AVA Critical Fan Speed (The AVA should not operate between the high and low RPM.)

Fan

Size

Fan RPM

Blade Angle

Low High Low High Low High Low High Low High Low High Low High Low High

600 615

900 925 565 580 790 800 460 470 500 510 325 340 370 400 370 400

1820 1865 1135 1165 1590 1615 935 950 1005 1025 660 680 750 805 750 805

615 630

920 945 570 585 790 805 465 475 510 520 330 340 375 400 375 400

1860 1910 1150 1180 1595 1620 940 955 1015 1035 665 680 755 810 755 810

625 645

940 965 575 590 530 535 465 475 520 530 330 345 380 400 380 400

1895 1950 1160 1195 1600 1625 945 960 1020 1045 665 685 760 810 760 810

635 655

955 980 580 600 530 540 470 480 520 535 330 345 380 405 380 405

1925 1980 1175 1210 1605 1630 950 970 1025 1050 670 685 765 815 765 815

645 660

965 995 585 605 800 810 470 480 520 535 330 345 385 405 385 405

1950 2005 1185 1220 1615 1635 955 975 1035 1060 670 690 770 820 770 820

650 670

975 1005 590 610 805 815 475 485 525 540 330 350 385 405 385 405

1970 2025 1195 1230 1620 1645 960 980 1040 1065 675 695 775 820 775 820

655 675

985 1010 595 615 805 820 475 490 525 540 335 350 385 410 385 410

1980 2040 1205 1240 1625 1650 970 985 1050 1070 675 700 780 825 780 825

655 675

985 1015 600 620 810 825 480 495 525 540 335 350 390 410 390 410

1990 2045 1215 1250 1635 1660 975 990 1055 1070 680 700 785 825 785 825

660 675

990 1015 605 625 815 825 485 500 525 540 340 350 390 410 390 410

1995 2045 1220 1250 1640 1670 980 1000 1060 1075 685 700 790 830 790 830

660 675 990 1010 610 625 815 830 485 500 525 540 340 350 395 410 395 410

1995 2040 1225 1250 1650 1675 985 1005 1065 1080 690 705 795 830 795 830

655 670

985 1005 615 625 820 835 490 500 525 540 340 350 395 415 395 415

1990 2030 1230 1245 1655 1685 995 1010 1070 1085 695 705 795 835 795 835

Fan

Size

Blade Angle

Fan RPM

370 385

375 390

380 395

385 400

390 405

390 410

395 410

400 415

400 420

405 420

410 420

Fan

Size

Blade Angle

Fan RPM

525 535

795 805

795 810

530 540

535 545

540 550

545 555

Fan

Size

Blade Angle

Fan RPM

315 320

320 325

325 330

325 335

325 340

Fan

Size

Blade

Angle

Fan RPM

330 340

335 345

340 350

345 355

350 360

Fan

Size

Blade Angle

Fan RPM

215 225

220 230

225 235

Fan

Size

Blade Angle

Fan RPM

250 265

250 270

255 270

260 270

260 275

265 275

Fan

Size

Blade Angle

Fan RPM

250 265

250 270

255 270

260 270

260 275

265 275

Page 6

Personal Safety

Prop Rotation

Test the fan to ensure the rotation of the wheel is the

same as indicated by the arrow marked Rotation.

115 and 230 Single Phase Motors

Fan wheel rotation is set correctly at the factory. Changing the rotation of this type of motor should only be attempted by a qualified 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 for specific information on reversing wheel direction.

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 correct direction.

Rotation

VAB/VAHB

Prop Side Prop Side Prop Side

Rotation

AVAB

Rotation

AFB

Final Installation Steps

a. Inspect fasteners and setscrews, particularly fan

mounting and bearing fasteners, and tighten according to the recommended torque shown in the table Rec-

ommended Torque for Setscrews/Bolts. b. Inspect for correct voltage with voltmeter. c. Ensure all accessories are installed.

Operation

Pre-Start Checks

a. Lock out all the primary and secondary power sources. b. Ensure fasteners and setscrews, particularly those

used for mounting the fan, are tightened.

c. Inspect belt tension and pulley alignment. d. Inspect motor wiring.

e. Ensure belt touches only the pulley.

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

g. Inspect prop-to-inlet clearance. The correct prop-to-

inlet clearance is critical to proper fan performance.

h. Close and secure all access doors. i. Restore power to the fan.

Start Up

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

lowest 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.

Recommended Torque for Setscrews/Bolts

Setscrews

Size

No.10 3/32” 28 33 3/8”-16 240

5/16” 5/32” 126 156 5/8”-11 1200

7/16” 7/32” 29 348 7/8”-9 2040

Key Hex

Across

Flats

1/4” 1/8” 66 80 1/2”-13 600

3/8” 3/16” 228 275 3/4”-10 2100

1/2” 1/4” 42 504

3/4” 3/8” 120 1440

If a problem is discovered, immediately shut the fan off. Lock out all electrical power and check for the cause of the trouble. See Troubleshooting.

Recommended

Torque

Inch-lbs.

Min. Max. Size

Hold Down Bolts

--5/8” 5/16” 92 1104

Wrench

Torque

(inch-lbs)

Inspection

Inspection of the fan should be conducted at the first 30

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

ation. During the inspections, stop the fan and inspect as per the Conditions Chart.

30 Minute Interval

Inspect bolts, setscrews, and motor mounting bolts. Adjust and tighten as necessary.

8 Hour Interval

Inspect belt alignment and tension. Adjust and tighten as necessary.

24 Hour Interval

Inspect belt tension. Adjust and tighten as necessary.

Maintenance

Establish a schedule for inspecting all parts of the fan. The frequency of inspection depends on the operating conditions and location of the fan.

Inspect fans exhausting corrosive or contaminated air within the first 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 inspection be conducted twice per year.

• Inspect bolts and setscrews for tightness. Tighten as necessary.

• Inspect belt wear and alignment. Replace worn belts with new belts and adjust alignment as needed. Refer to Belt and Pulley Installation, page 3.

• Bearings should be inspected as recommended in the

Conditions Chart on page 6.

Page 7

• Inspect springs and rubber isolators for deterioration and replace as needed.

• Inspect for cleanliness. Clean exterior surfaces only. Removing dust and grease on motor housing assures proper motor cooling. Removing dirt from the wheel and housing prevent imbalance and damage. housing prevent imbalance and damage.

Lubricants

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 flushed clean. If another type of grease is used, it should be a lithium-based grease conforming to NLGI grade 2 consistency.

A 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 capable of intermittent highs of +250°F. For temperatures above 250° Mobiltemp SHC 32 is recommended.

Motor Bearings

Motor bearings are pre-lubricated and sealed. Under normal conditions they will not require further maintenance for a period of ten years. However, it is advisable to have your maintenance department remove and disassemble the motor, and lubricate the bearings after three years of operation in excessive heat and or in a contaminated airstream consisting of airborne abrasives.

Fan Bearings

Vane Axial bearings are lubricated through a grease fitting on the exterior of the fan housing and should be lubricated by the schedule, Conditions Chart.

Use no more than three injections with a hand-operated grease gun.

Conditions Chart

RPM Temperature

100 Up to 120°F Clean 6 to 12 months

500 Up to 150°F Clean 2 to 6 months 1000 Up to 210°F Clean 2 weeks to 2 months 1500 Over 210°F Clean Weekly

Any Speed Up to 150°F Dirty 1 week to 1 month Any Speed Over 150°F Dirty Daily to 2 weeks Any Speed Any Temperature Very Dirty Daily to 2 weeks

Any Speed Any Temperature

Fan

Status

Extreme

Conditions

Greasing

Interval

Daily to 2 weeks

Motor Services

Should the motor prove defective within a one-year period, contact your local Loren Cook representative or your nearest authorized electric motor service representative.

Changing Shaft Speed

All belt driven AF fans with motors up to and including 5 HP are equipped with variable pitch pulleys. To change the fan speed, perform the following:

a. Loosen setscrew on driver (motor) pulley and remove

key, if equipped.

b. 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.

c. 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 limits of the fan and the horsepower limits of the motor are maintained.

The AVAB and VAB have standard fixed pitch sheaves. To change speeds, consult factory.

Pulley and Belt Replacement

a. Remove pulleys from their respective shafts.

b. Clean the motor and fan shafts.

c. Clean bores of pulleys and coat the bores with heavy

oil.

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

shafts.

e. Remove burrs from shaft by sanding.

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

shaft. Damage to the pulleys can occur when excessive force is used in placing the pulleys on their respec-

tive shafts. g. Tighten in place. h. Install belts on pulleys and align as described in the

Belt and Pulley Installation section.

Bearing Replacement

The fan bearings are pillow block ball bearings. a. Loosen and remove belts by lowering motor mounting

plate with the four adjusting nuts.

b. Remove the bearing cover. Do not remove fan

sheave yet.

c. Remove prop by loosening setscrews and retaining

bolts and sliding off shaft.

d. Record the location of the fan sheave from end of

shaft, and remove the sheave.

e. Record the distance from the bearing to the end of the

shaft.

f. Loosen setscrews on bearings and remove shaft. g. Remove bearings and replace with new bearings. h. Slide shaft through bearings until shaft protrudes the

same amount as original shaft. Tighten setscrews. i. Replace fan sheave in original location. j. Replace prop but do not tighten yet.

k. Slide prop on shaft and center prop.

l. Replace and tighten belts.

m. Test run the fan.

n. Re-tighten setscrews on bearings, sheave, and prop.

Recheck belt tension and adjust as needed.

o. Replace bearing cover.

Prop Adjustment

The AVA prop pitch is adjustable. Consult factory for pro-

cedure.

Page 8

VAD Parts Li st

Item

No.

Description

1 Drum Weldment 2 Propeller Fixed Pitch

3 Prop Bushing 4 Motor 5 Wiring Box 6 Motor Mounting Bolts

Airflow

VAB Parts List

Airflow

Item

No.

Description

1 Drum Weldment 2Shaft 3 Bearing 4Prop 5Prop Bushing 6 Belt Tunnel 7 Motor Plate 8 Inner Drum Nose 9 Motor

10 Drive Sheave

11 Driven Sheave

12 Belt

Page 9

VAHB Parts List

Item

No.

1 Drum Weldment 2 Shaft 3 Bearing 4Prop 5 Prop Bushing

Description

6 Belt Tunnel (2) 7 Motor Plate 8 Inner Drum Nose

9Motor 10 Drive Sheave 11 Driven Sheave 12 Belt

Airflow

AVAD Parts List

Item

No.

Description

1 Drum Weldment 2Prop 3 Prop Bushing 4Motor 5 Wiring Box 6 Motor Mounting Bolts

Airflow

Page 10

AVAB Parts List

Airflow

Item

No.

1 Drum Weldment 2Shaft 3 Bearing 4Prop 5 Prop Bushing 6 Motor Plate 7 Inner Drum Nose 8 Motor

9 Drive Sheave 10 Driven Sheave 11 Belt 12 Belt Tunnel (2)

Description

AFB Parts List

Airflow

Item

No.

1 Drum Weldment 2 Shaft 3 Bearing 4 Motor Plate

6 Prop Bushing 7 Bearing Cover 8 Motor

9 Drive Sheave 10 Driven Sheave 11 Be lt

Description

Prop

C-Cast Bushing

H-High Temperature

Construction

S-Stainless Steel

Construction

Page 11

AFBV Parts List

Airflow

Item

No.

1 Drum Weldment 2 Shaft 3Bearing 4 Motor Plate

6Prop Bushing 7 Bearing Cover 8 Motor

9 Drive Sheave 10 Driven Sheave 11 Be lt 12 Vane Section

Description

Prop

C-Cast Bushing

H-High Temperature

Construction

S-Stainless Steel

Construction

AFD-C Parts List

Airflow

Item

No.

1 Drum Weldment 2 Propeller 3 Prop Bushing 4 Motor 5 Motor Mounting Bolts

Description

Page 12

AFDV-C Parts List

Airflow

Item

No.

1 Drum Weldment 2 Propeller

Description

3 Prop Bushing 4 Motor 5 Motor Mounting Bolts 6 Vane Section

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 prop 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.

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 prop clearance.

•Incorrect fan RPMs.

•Incorrect voltage.

Overheated Bearings

•Improper bearing lubrication

•Excessive belt tension.

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 modified 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 Offices, 2015 East Dale Street, Springfield, Missouri 65803-4637, explaining in writing, in detail, your complaint and referring to the specific model and serial numbers of your fan. Upon receipt by Loren Cook Company of your written complaint, you will be notified, 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 adjustment 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 specifically the right. You may have other legal rights which vary from state to state.

Corporate Offices: 2015 E. Dale Street Springfield, MO 65803 417.869.6474

lorencook.com

VA/AVA/AF IOM - May 2004