COOK UCIC User Manual

Page 1

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 (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.

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

Page 2

• 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

Page 3

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

CENTER

DISTANCE

(CD)

GAP

Figure 5

X Y

GAP

Page 4

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

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

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

728

3 9

L2L

High Voltage

460 Volts

456

789

L2L

3 Phase, 9 Lead Motor Delta-Connection

Low Voltage

208/230 Volts

7 6

High Voltage

460 Volts

789 456

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

Low Speed

Line

Single Speed, Single Phase, Dual Voltage

Ground A

Line

T-5

J-10

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

Line

Typical Damper Motor Schematic

Fan

Motor

Transformer**

L3 L2

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

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

Together

Motor

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

Line

Low Speed

Motor

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

Page 5

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.

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 coun-

ter-clockwise as viewed from the drive side of the wheel.

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 on page 4 for specific information on reversing 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 correct direction.

Tubular Centrifugal Wheel Rotation

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

Recommended 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 wheel-to-inlet clearance. The correct wheel-to-

inlet clearance is critical to proper fan performance. h. Close and secure all access doors. g. 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.

NOTICE! 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.

Inspection

Inspection of the fan should be conducted at the first 30

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

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

Recommended Torque for Setscrews/Bolts

Setscrews

Size

No.10 3/32” 28 33 3/8”-16 240

1/4” 1/8” 66 80 1/2”-13 600

5/16” 5/32” 126 156 5/8”-11 1200

3/8” 3/16” 228 275 3/4”-10 2100

7/16” 7/32” 348 384 7/8”-9 2040

1/2” 1/4” 504 600 1”-8 3000 5/8” 5/16” 1104 1200 1-1/8”-7 4200 3/4” 3/8” 1440 1800 1-1/4”-7 6000

Key Hex

Across

Flats

Recommended

Torque

Min. Max. Size

(IN/LB.)

Hold Down Bolts

Wrench

Torque

Page 6

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. 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, page 3.

• Bearings should be inspected as recommended in the Conditions Chart.

• Inspect variable inlet vanes for freedom of operation and excessive wear. The vane position should agree with the position of 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 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.

Lubrication - Fan Bearings

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

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.

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

than three injections with a hand-operated grease gun.

Lubrication Conditions Chart

Fan Class Fan Status Shaft Size

Tubular

Centrifugal

Blower Class I

Tubular

Centrifugal

Blower

Class II Tubular

Centrifugal

Blower

Class III

Normal Conditions

(Clean, Dry & Smooth)

Extreme Conditions

(Dirty/Wet/Rough) Normal Conditions

(Clean, Dry & Smooth)

Extreme Conditions

(Dirty/Wet/Rough) Normal Conditions

(Clean, Dry & Smooth)

Extreme Conditions

(Dirty/Wet/Rough)

> 1-1/2” 10,000 < 1-1/2” 2,000 > 1-1/2” 2,000 < 1-1/2” 400 > 1-1/2” 7,500 < 1-1/2” 1,000 > 1-1/2” 1,500 < 1-1/2” 200

> 2” 3000 < 2” 500 > 2” 500 < 2” 100

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.

Maximum Interval

(operational hrs)

Exceptions to the greasing interval chart:

• Periodic Applications (any break of one week or

more): it is recommended that full lubrication be performed

prior to each break in operation.

• Higher Temperature: it is recommended to halve the intervals 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.

• V ertical Shaft: it is recommended that the intervals should be halved.

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.

Lubrication - Motor Bearings

Motors are provided with prelubricated bearings. Any lubrication instructions shown on the motor nameplate supersede instructions below.

Motor bearings without provisions for relubrication 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 3 years of operation to prevent interruption of service.

For motors with provisions for relubrication, follow intervals of the table below.

Relubrication Intervals

NEMA Frame Size

Up to and

Service

Conditions

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 months

including 184T

1800 RPM

and less

Over 1800

RPM

213T-365T 404T and larger

1800 RPM

and less

Over 1800

RPM

1800 RPM

and less

Over 1800

RPM

Motors are provided with a polyurea mineral oil NGLI #2 grease. All additions to the motor bearings are to be with a compatable 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 period, 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 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.

Page 7

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.

Pulley and Belt Replacement

a. Remove pulleys from their

respective shafts.

b. Clean the motor and fan

Maximum RPM

CIC

Class 1 Class 2 Class 3

Size

120 3948 5151 135 3508 4577 150 2749 3587 165 2509 3273 180 2150 2805 3534 195 1987 2592 3266 210 1841 2402 3026 225 1712 2234 2814 245 1608 2098 2643 270 1418 1850 2331 300 1276 1665 2097 330 1162 1516 1910 365 1065 1389 1751 402 964 1258 1585 445 873 1139 1435 490 793 1035 1303 540 719 938 1182 600 648 845 1065 660 587 766 965 730 532 694 874

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 respective

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.

Figures 6, 7, and 8, on page 6, show the components

described in the following steps.

CIC Bearing Replacement

a. Loosen and remove belts by lowering motor mounting

plate with the four adjusting nuts. b. Remove the discharge cover by removing the attaching

bolts around the perimeter of the inner drum (discharge

end of unit). Do not remove fan sheave yet. c. Remove the discharge cover by removing the attaching

bolts around the perimeter of the inlet plate. d. Remove inlet cone by removing attaching bolts/nuts

around perimeter of the inlet plate. e. Remove wheel by loosening setscrews and sliding off

shaft. A 2-jaw puller may be required. f. Record the location of the fan sheave from end of shaft,

and remove the sheave. g. Record the distance from either bearing to the end of

the shaft. h. Loosen setscrews on bearings and remove shaft. i. Mark setscrew location on shaft and smooth down any

raised shaft material as required. j. Remove bearings from bearing base and replace with

new ones, noting the exact location of each; Do not fully

tighten base bolts. k. Slide shaft through bearings until shaft protrudes the

same amount as measured above. Tapping the inner

race of each bearing with a soft driver may be required.

NOTICE! Do not hammer the end of the shaft or the

bearing housing.

Figure 6- CIC Arrangement 1 Components

Figure 7 - CIC Arrangement 9 Components

Figure 8 - UCIC Components

l. Return setscrews to same location as marked above

and tighten one setscrew on each bearing to half its specified torque.

m. Rotate the shaft to allow the bearings to align them-

selves.

n. Install wheel and inlet cone to their proper location per

wheel-to-inlet clearance section on page 3. o. Tighten hold-down bolts to proper torque. p. Turn the shaft by hand. resistance should be the same

as it was before hold-down bolts were fully tightened. q. Tighten all bearing setscrews to full specified torque. r. Replace the sheave, align with motor sheave, and

adjust the belt tension. s. Test run fan and retighten all setscrews and bolts, and

trim balance as necessary (.0785 in/sec max). t. Replace discharge cover.

After 24 hours of operation, retighten all setscrews and bolts

to the appropriate torque.

Page 8

UCIC Bearing Replacement

a. Remove windband and damper assembly. b. Remove fan from curb, then lay the fan on its side to

allow access to the underside.

c. Loosen and remove belts by lowering the motor slide

base with the four adjusting nuts.

d. Remove the discharge cover by removing the attach-

ing bolts around the perimeter of the inner drum (discharge end of unit). Do not remove fan sheave yet.

e. Remove inlet cone by removing attaching bolts

around the perimeter of the inlet cone.

f. Remove wheel by loosening setscrews and sliding off

shaft.

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

shaft, and remove the sheave.

h. Record the distance from either bearing to the end of

the shaft. i. Loosen setscrews on Bearings and remove shaft. j. Mark setscrew location on shaft and smooth down any

raised shaft material as required. k. Remove bearings from bearing base and replace with

new ones, noting the exact location of each; Do not

fully tighten base bolts. l. Slide shaft though bearings until shaft protrudes the

same amount as measured above. Tapping the inner

race of each bearing with a soft driver may be

required. NOTICE! Do not hammer the end of the

shaft or the bearing housing. m. Return setscrews to same location as marked above

and tighten one setscrew on each bearing to half its

specified torque. n. Rotate the shaft to allow the bearings to align them-

selves. o. Install wheel and inlet cone to their proper location per

wheel-to-inlet clearance section on page 3. p. Tighten hold-down bolts to proper torque. q. Turn the shaft by hand. Resistance should be the

same as it was before hold-down bolts were fully tight-

ened. r. Tighten all bearing setscrews to full specified torque. s. Replace the sheave, align with motor sheave, and

adjust the belt tension. t. Replace unit on curb and reconnect power. u. Test run fan and retighten all setscrews and bolts, and

trim balance as necessary (.0785 in/sec max.). v. Replace discharge cover. w. Replace windband and damper assembly.

After 24 hours of operation, retighten all setscrews and bolts to the appropriate 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.

Page 9

CIC Arrangement 1 Parts List

AIRFLOW

Side View

Item No.

1 Wheel 9 Motor Slide Base 2 Inlet Cone 10 Motor 3 Inlet Plate 11 Motor Sheave 4 Housing 12 Belt Set 5 Inboard Bearing 13 Floor Mount Legs (2) 6 Outboard Bearing 14 Discharge Cover Plate 7 Shaft 15 Fan Sheave 8 Channel Base

Description

Sizes 120 - 730 Sizes 120 - 730

Item No.

Dischrage View

Description

CIC Arrangement 9 Parts List - Floor Mount

AIRFLOW

Item No.

1 Belt Set 9 Outboard Bearing 2 Motor Sheave 10 Inboard Bearing 3 Motor 11 Housing 4 Motor Plate 12 Wheel 5 Discharge Cover Plate 13 Inlet Cone

Description

Sizes 120-730 Sizes 120 -730

Item No.

Description

Page 10

CIC Arrangement 9 Parts List - Ceiling Mount

SIZES 120 - 490

AIRFLOW

Discharge View Side View Inlet View

SIZES 540 - 730

Discharge View Side View Inlet View

Item No.

Description

Sizes 120 - 490 Sizes 540 - 730

Item No.

Description

1 Fan Sheave 1 Fan Sheave 2 Belt Set 2 Belt Set 3 Motor 3 Motor 4 Motor Sheave 4 Motor Sheave 5 Motor Plate 5 Motor Plate 6 Discharge Cover Plate 6 Discharge Cover Plate 7 Bearing Support 7 Bearing Support 8 Inboard Bearing 8 Inboard Bearing

9 Outboard Bearing 9 Outboard Bearing 10 Shaft 10 Shaft 11 Housing 11 Housing 12 Hanging Brackets (4) 12 — 13 Inlet Cone 13 Inlet Cone 14 Wheel 14 Wheel 15 Inlet Plate 15 Inlet Plate 16 — 16 Mounting Bracket 17 — 17 Mounting Rail Angle

Page 11

CIC-Arrangement 9 Vertical Floor/Ceiling Mount Parts List

Discharge View Side View Inlet View

AIRFLOW

UCIC Parts List

IRFLOW

Item

No.

Description

Sizes 120 - 730

1 Belt Set 2 Motor Sheave 3 Motor 4 Motor Plate 5 Discharge Cover Plate 6 Fan Sheave 7 Bearing Support 8 Floor Mount Legs/Hanging Brackets (4)

9 Shaft 10 Outboard Bearing 11 Inboard Bearing 12 Housing 13 Wheel 14 Inlet Cone 15 Inlet Plate

Part

No.

Description

Sizes 120-600

1 Damper Stop 2 Housing 3 Motor Plate

4 Weather Cover (standard) 5 Motor 6 Motor Sheave

12 13

7 Belt Set 8 Windband

9 Fan Sheave 10 Butterfly Damper Assembly 11 Outboard Bearing 12 Bearing Support

13 Inboard Bearing 14 Shaft 15 Wheel 16 Inlet Cone 17 Curb Cap

Page 12

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. For fans provided with motors, the motor manufacturer warrants motors for a designated period stated in the manufacturer’s warranty. Warranty periods vary from manufacturer

to manufacturer. Should motors furnished by Loren Cook Company prove defective during the designated period, they should be returned to the nearest authorized motor service station. Loren Cook Company will not be responsible for any removal or installation costs.

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

lorencook.com

CIC/UCIC IOM December 2013