Loren cook Centri-vane cv series User manual

1CV IO&M B51161-003

Receiving and Inspection

Carefully inspect the unit and accessories for any dam-

age and shortage immediately upon receipt of the unit.

•Turn the propeller by hand to ensure it turns freely and

does not bind.

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

Handling

Lift the fan by the outside housing and support leg.

NOTICE! Never lift by the shaft, motor or housing.

Storage

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

tion, store it in its original shipping crate and protect it from

dust, debris and weather.

Centri-Vane®Aluminum Inline and Roof Fans

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

CVB

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 off, in case of an emergen-

cy and in order that maintenance personnel are provided

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.

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 contact

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 building

code for the site. The local code ofcial may require varia-

tions from the recognized code based on local data. The

licensed engineer of record will be responsible for prescrib-

ing the correct attachment based on construction materi-

als, code requirements and environmental effects specic

to the installation.

This publication contains the installation, operation

and maintenance instructions for standard units of the

CV: Centri-Vane®Aluminum Inline and Roof Fans.

•CVD

•CVB

•CVR

•CVR-S

•CV/UCV-S

• CVS

Carefully read this publication and any

supplemental documents prior to any

installation or maintenance procedure.

Loren Cook catalog, CV, provides additional information

describing the equipment, fan performance, available

accessories and specication data.

For additional safety information, refer to AMCA Publica-

tion 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.

2CV IO&M B51161-003

Tolerance

Center

Distance

Maximum

Gap

Up thru

12” 1/16”

12” up

through

1/8”

Over 48” 1/4”

OFFSET ANGULAR OFFSET/ANGULAR

CENTER

DISTANCE

(CD)

GAP GAP

Pulley Alignment

Pulley alignment is adjusted by loosening 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 align-

ment tolerance. All contact points (in-

dicated by WXYZ) are to have a gap

less than the tolerance shown in the

above Tolerance table.

When the pulleys are not the same

width, the allowable gap must be

adjusted by half of the difference in

width. 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 recom-

mended torque shown in the table below, Recommended

Torque for Setscrews/Bolts.

2. Inspect for correct voltage with voltmeter.

3. Ensure all accessories are installed.

4. Test the fan to be sure the rotation is the same as indicated

by the arrow marked Rotation.

Wheel 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. 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 electri-

cally reversible by switching

two of the supply leads. For

this reason, the rotation of

the fan cannot be restricted

to one direction at the fac-

tory. See Wiring Diagrams

for specic information on

reversing wheel direction.

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

rection. This will overheat the motor and cause seri-

ous 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.

To maintain good working condition of a CV when it is

stored outdoors, or on a construction site, follow the addi-

tional 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

Installation

To prevent damage to the fan during shipping, motors 5 HP and

larger, and extremely heavy motors (cast iron or severe duty) are

shipped loose and must be eld mounted by bolting the motor on

the motor mounting plate in the existing mounting slots.

UCV Fan 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.

Place fan over roof opening. Secure the fan with lag screws,

anchor bolts, or other suitable fasteners.

Wiring Installation

Direct Drive

Wire the electrical box on the blower housing.

Belt Drive

The motor can be wired directly since the motor is external to

the fan.

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 mo-

tor base to power assembly. Do not remove motor mounting bolts.

NOTICE! Follow the wiring diagram in the disconnect

switch and the wiring diagram provided with the mo-

tor. Correctly label the circuit on the main power box

and identify the closed switch to promote safety (i.e.,

red tape over a closed switch).

Belt and Pulley Installation

Belt tension is determined by the sound of the belts when the

fan is rst started. The belts will produce a loud squeal, which dis-

sipates after the fan is operating at full capacity. If belt tension is

too tight or too loose, lost efciency and damage can occur.

Do not change the pulley

pitch diameter to change

tension. The change will re-

sult in a different fan speed.

1. Loosen the motor

plate adjustment nuts

on motor base and

move motor plate in

order that the belts

can easily slip into the

grooves on the pul-

leys. Never pry, roll,

or force the belts over

the rim of the pulley.

2. Adjust the motor plate

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 pressing the belt. See

Figure 3.

3. Lock the motor plate adjustment nuts in place.

4. Ensure pulleys are properly aligned. See Pulley Alignment.

1 foot

1/4 inch

Figure 2

3CV IO&M B51161-003

2 Speed, 2 Winding, 3 Phase

T3Low Speed

Low Speed

High Speed

Motor

T13

T12

T11

L2Line

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

Transformer** 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 and 460 volt

models. The damper motor nameplate voltage should be veri-

ed prior to connection. **A transformer may be provided in

some installations to correct the damper motor voltage to the

specied voltage.

Operation

Pre-Start Checks

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

2. Inspect fasteners and setscrews, particularly those used for

mounting the unit, and tighten if necessary.

3. Inspect belt tension and pulley alignment. (Remember, if

belt tension is correct, a loud squeal occurs as the fan in-

creases to full power.)

4. Inspect motor wiring.

5. Ensure the belt touches only the pulleys.

6. Rotate the prop to ensure it does not rub against the venturi.

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

8. Test the fan to ensure the rotation of the propeller is the

same as indicated by the rotation label.

9. Close and secure all access doors.

10. Restore power to unit.

Start Up

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

lowest speed. Inspect for the following:

• Direction of rotation

• Excessive vibration

• Unusual noise

• Bearing noise

• Improper belt alignment or tension (listen for a continuous

squealing noise)

• 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 Diagrams

Single Speed, Single Phase Motor

T-1

T-4

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-4

Low Speed

High Speed

L2Line

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

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

leads.

Single Speed, Single Phase, Dual Voltage

Ground B

J-10

T-5

Ground A

Link A

Link B

Low Voltage

Line

Ground A

Link A & B

Line

Ground B

T-5

J-10

When ground 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

magnetic control.

4CV IO&M B51161-003

Bearings should be relubricated in accordance with the

conditions chart below.

Conditions Chart

RPM Temp °F Greasing Interval

Up to 1000 -30 to 120 6 months

120 to 200 2 months

1000 to 3000 -30 to 120 3 months

120 to 200 1 month

Over 3000 -30 to 120 1 month

120 to 200 2 weeks

Any Speed < -30 Consult Factory

Any Speed > 200 1 week

For moist or otherwise contaminated installations; divide the in-

terval by a factor of three. For vertical shaft installations divide

the interval by a factor of two.

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 damage

seal and reduce life through excess contamination and/or

loss of lubricant.

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

than three injections with a hand operated grease gun.

Motor Bearings

Motors are provided with prelubricated bearings. Any

lubrication instructions shown on the motor nameplate su-

persede instructions below.

Direct Drive 1050/1075, 1200, 1300 & 1500 RPM units

use a prelubricated sleeve bearing that has a oil saturated

wicking material surrounding it. The initial factory lubrica-

tion is adequate for up to 10 years of operation under nor-

mal conditions. However, it is advisable to add lubricant

after three years. Use only LIGHT grade mineral oil or SAE

10W oil up to 30 drops.

If the unit has been stored for a year or more it is ad-

visable to lubricate as directed above. For units in severe

conditions, lubrication intervals should be reduced to half.

Motors without sleeve bearings (as described above) will

have grease lubricated ball or roller bearings. Motor bear-

ings without provisions for relubrication will operate up to

10 years under normal conditions with no maintenance. In

severe applications, high temperatures or excessive con-

taminates, it is advisable to have the maintenance depart-

ment disassemble and lubricate the bearings after 3 years

of operation to prevent interruption of service.

For motors with provisions for relubrication, follow inter-

vals of the table below.

Relubrication Intervals

Service

Conditions

Nema Frame Size

Up to and

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

1800

RPM

and

Less

Over

1800

RPM

1800

RPM

and

Less

Over

1800

RPM

1800 RPM

and 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.

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 following directions.

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. 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 rst month of operation. Fans exhausting con-

taminated air (airborne abrasives) should be inspected ev-

ery three months. Clean the propeller and air inlets if ma-

terial build-up is excessive. Excessive build-up can cause

imbalance and failure of the propeller. Regular inspections

are recommended for fans exhausting non-contaminated

air. It is recommended the following inspections 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. See Belt and Pulley

Installation, page 2

• Bearings should be inspected as recommended in the

Conditions Chart

• Inspect for cleanliness. Clean exterior surfaces only.

Removing dust and grease on motor housing assures proper

motor cooling

Lubricants

Loren Cook Company uses petroleum lubricant in a lith-

ium base conforming to NLGI grade 2 consistency. Other

grades of grease should not be used unless the bearings

and lines have been ushed clean. If another grade of

grease is used, it should be lithium-based.

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

rust-inhibiting lubricant that is water resistant. Its tempera-

ture range is from -30°F to +200°F and capable of intermit-

tent highs of +250°F.

Fan Bearings

The fan bearings are provided prelubricated. Any spe-

cialized lubrication instructions on fan labels supersedes

information provided herein. Bearing grease is a petroleum

lubricant in a lithium base conforming to an NLGI #2 con-

sistency. If user desires to utilize another type of lubricant,

they take responsibility for ushing bearings and lines, and

maintaining a lubricant that is compatible with the installa-

tion.

An NLGI #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.

5CV IO&M B51161-003

Bearing Replacement

The fan bearings are ange ball bearings.

1. Loosen the motor plate adjustment bolts, then slide

the motor plate so the belt will easily slip off.

2. Remove the driven pulley by loosening the setscrew.

3. Separate the outer housing halves.

4. Remove wheel, then loosen the setscrews on the hub

that holds the shaft and remove the hub plate. (Refer

to hub removal instructions below.)

5. Remove the bolts next to the straightening vanes and

pull the inner housing out.

6. Loosen the bearing setscrews and hold-down bolts,

then slide shaft out.

7. Sand the burrs on the shaft where the setscrews were

located.

8. Slide new bearings onto the shaft to the desired lo-

cation and loosely mount bearings onto the bearing

support. Bearing bolts and setscrews should be loose

enough to allow shaft positioning.

9. Replace the hub plate and wheel, align properly and

then tighten bearing hold-down bolts securely to the

bearing supports.

10. Align setscrews bearing to bearing and secure tightly

to the shaft.

Never tighten both pairs of setscrews before securing

bearing mounting bolts. This may damage the shaft.

11. Reassemble the unit.

12. Inspect the wheel position again. If necessary, read-

just by loosening the bearing bolts and setscrews and

repeat from step 5.

Hub Removal

1. Drill two 1/4” diameter holes, 180°apart centered ap-

proximately between the shaft and the outside diam-

eter of the hub, 3/8” to 1/2” in depth.

2. Tap 1/4” holes to 5/16” thread with a 5/16” hole tap. Do

not drill or tap greater than recommended.

3. Screw the puller arms to the full depth of the threads

into the tapped holes. Align center of the puller with

the center of the shaft. Ensure all setscrews in the

hub, normally two, are fully removed.

4. Slowly remove wheel from the shaft.

Recommended Puller

Lisle No. 45000 Steering Wheel Puller. This puller is

available at most automotive parts retail outlets.

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 Propeller Wall fans with motors up to and

including 5 HP 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. Open or close the groove facing to change the pitch

diameter.

Speed Reduction

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

groove.

Speed Increase

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

groove. Ensure RPM limits of the fan and the horsepow-

er limits of the motor are maintained.

3. Retighten pulley setscrew on one of the at areas of

the motor shaft.

4. After the adjustment is made, check for proper belt

tension. See the Belt and Pulley Installation section.

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.

5. Clean the bores of the pulleys and place a light coat of

oil on the bores.

6. Remove burrs from shaft by sanding.

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

Do not hammer the pulleys onto the shafts because

this may damage the bearings.

8. Tighten in place.

9. Install belts on pulleys and align as described in the

Belt and Pulley Installation section.

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 - -

1 9/16” 5600 6400 - -

6CV IO&M B51161-003

Parts List

CVD

Air Flow

Part No. Part Description (Sizes 70-180)

1 Outer Discharge Housing

2 Motor Plate

3Wheel Assembly

4 Outer Inlet Housing

5 Support Leg

6 Rubber Channel Isolator

7 Motor

CVB

910

Air Flow

Part No. Part Description (Sizes 12-36)

1 Belt Set

2 Motor

3 Motor Plate

4 Motor Plate Saddle

5Wheel Assembly

6 Bearings

7 Bearing Plate

8 Outer Inlet Housing

9 Support Legs

10 Rubber Channel Isolator

11 Shaft

12 Outer Discharge Housing

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

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 Motor:

• Improper bearing lubrication

• Excessive belt tension

7CV IO&M B51161-003

CVS

Air Flow

Part No. Part Description (Sizes 12-36)

1 Belt Set

2 Motor Plate

3 Motor

4 Outer Discharge Housing

5 Belt

6 Outer Inlet Housing

7Wheel Assembly

8 Hub

9 Bearings

10 Shaft

11 Mounting Feet

CVR

Air Flow

Part No. Part Description (Sizes 10-36)

1Topcap Assembly

2 Post

3 Outer Discharge Housing

4 Belt Set

5 Belt Guard

6 Motor

7 Motor Plate

8 Motor Plate Saddle

9Wheel Assembly

10 Bearing Plate

11 Outer Inlet Housing

12 Bearings

CVR-S

Air Flow

Part No. Part Description (Sizes 10-36)

1Topcap Assembly

2 Post

3Wheel Assembly

4 Motor Plate Saddle

5 Motor Plate

6 Motor

7 Belt Guard

8 Belt Set

9 Outer Discharge Housing

10 Bearings

11 Outer Inlet Housing

12 Bearing Plate

UCV

Air Flow

Part No. Part Description (Sizes 10-36)

1Damper Assembly

2 Outer Discharge Housing

3 Belt Set

4 Belt Guard

5 Motor

6 Motor Plate

7 Motor Plate Saddle

8 Bearing Plate

9Wheel Assembly

10 Base

11 Outer Inlet Housing

12 Bearings

13 Shaft

8CV IO&M B51161-003

UCV-S

Air Flow

Part No. Part Description (Sizes 10-36)

1Damper Assembly

2 Motor Plate Mount

3 Motor

4 Weather Cover

5 Belt Set

6 Main Housing

7 Bearing Plate

8Wheel Assembly

9 Base

10 Outer Inlet Housing

11 Bearings

12 Shaft

13 Outer Discharge Housing

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 ve (5) 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 Of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