4

CP-BK

2015 E. DALE STREET

SPRINGFIELD, MO 65803-4637

417.869.6474

FAX 417.862.3820

lorencook.com

BK Broiler Exhaust Fan - February 2002

Counter Clockwise Rotation Shown, Rectangular Base�with Curb Cap, Inlet Plenum, Discharge Stack and Stand

27 1/8" Outside

48 1/2" Outside

DischargeStack

InletPlenum

ExistingCurb

Data

120 CP-BK

32

120 CP-BK

CFM OVFPM

0.250 SP 0.500 SP 0.750 SP 1.000 SP 1.250 SP 1.500 SP 1.750 SP 2.000 SP 2.250 SP 2.500 SPRPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

500 961 802 .03 1018 .07 1220 .11 1396 .15600 1154 879 .04 1060 .08 1243 .12 1413 .17 1567 .22 1708 .27700 1346 953 .06 1128 .09 1280 .14 1437 .19 1586 .24 1724 .30 1852 .35 1973 .42800 1538 1017 .07 1205 .11 1340 .16 1474 .21 1612 .27 1745 .33 1871 .39 1989 .45 2101 .52 2208 .59900 1730 1076 .09 1282 .14 1414 .19 1532 .24 1651 .30 1773 .36 1894 .42 2010 .49 2120 .56 2225 .63

1000 1923 1150 .11 1355 .16 1492 .22 1603 .27 1708 .33 1815 .40 1925 .46 2035 .54 2143 .61 2245 .681100 2115 1234 .13 1420 .19 1568 .25 1680 .31 1779 .37 1874 .44 1971 .51 2071 .58 2171 .66 2271 .741200 2308 1321 .16 1476 .22 1642 .28 1758 .35 1855 .42 1945 .49 2033 .56 2121 .64 2211 .71 2303 .801300 2500 1410 .19 1539 .25 1710 .33 1833 .40 1933 .47 2021 .54 2104 .62 2184 .69 2265 .78 2347 .861400 2692 1501 .23 1615 .29 1769 .37 1906 .45 2009 .52 2099 .60 2180 .68 2257 .76 2332 .84 2406 .931500 2885 1592 .27 1697 .34 1826 .42 1973 .50 2084 .58 2175 .66 2258 .75 2333 .83 2405 .92 2475 1.011600 3077 1683 .32 1783 .39 1891 .47 2033 .56 2155 .65 2251 .73 2335 .82 2411 .91 2482 1.001700 3269 1776 .37 1871 .45 1966 .53 2089 .62 2221 .71 2324 .81 2410 .90 2488 1.001800 3462 1868 .43 1960 .51 2048 .60 2151 .69 2280 .79 2393 .89 2484 .991900 3654 1961 .50 2050 .58 2132 .67 2222 .76 2336 .86 2456 .972000 3846 2055 .57 2141 .66 2219 .75 2299 .84 2397 .95 2513 1.062100 4038 2148 .65 2232 .75 2307 .84 2382 .94 2467 1.042200 4231 2241 .74 2323 .84 2397 .94 2468 1.042300 4423 2337 .83 2415 .94 2486 1.042400 4615 2431 .94 2508 1.05

Performance shown is for Installation Type B: Free Inlet, Ducted Outlet. Power rating (BHP) does not include drive losses. Performance ratings do not include the effects of appurtenances in the airstream. *Outlet velocity (OV) in feet per minute (FPM) at discharge stack.

Wheel Diameter

- 12”

Wheel Type

- Flatblade

Tip Speed (FPM)

= 3.21 x RPM

Max. BHP

= .068 x (RPM/1000)

3

Plenum Inlet Area

= 1.95 Sq. Ft.

Outlet Area

= .52 Sq. Ft.

Outlet Velocity* (FPM)

= CFM/.52

Max. Motor Frame

- 184T, Arr. 10

Approx. Ship Wt.

- 270 lbs. with

motor and drives as complete unit.

CP-BK

Information

Flow (CFM)

Sta

tic P

ress

ure

(In

W.G

.)

0 600 1200 1800 2400 3000

2.5

2.0

1.5

1.0

0.5

0

2527 RP

M

.334 HP

802 RPM

.5 HP

2350 RP

M

.75 HP

2150 RP

M

1 HP

1950 RP

M 1.5 H

P

1750 RP

M

1550 RP

M

1400 RP

M

1200 RPM

• A custom Cook CP continuously welded steel, arrangement10 utility set.

• Exhaust fan package is factory assembled, balanced andtest run.

• Curb mounted inlet plenum designed for maximum effi-ciency and minimal static pressure loss.

• Discharge stack to assure high velocity exhaust plume.

• Tested for continuous operation at 500˚ F.

• Listed for both UL 705 (Safety Standard for Power Ventila-tors) and UL 762 (Power Roof Ventilators for RestaurantExhaust Appliances).

• Features an “Easy Clean” finish utilizing a durable, hightemperature, non-stick cookware coating.

• Easy access for cleaning to inlet plenum and ductwork withquick release latches and large removable panel.

• Easy access to fan wheel with hinged discharge stack quickrelease latch.

• Aluminum grease trough is positioned directly under fandrain and is easily removable for cleaning. Grease troughincludes rainwater overflow feature.

• Adjustable aluminum legs to support fan at NFPA 96required discharge height.

• Curb cap and support legs designed to fit existing BK curb.

• All bolted connections sealed with a durable silicone adhe-sive material rated for 600˚ F continuous operation.

• Quick release inspection panels on power assembly hous-ing allow inspection of motor and belts without removingweather cover.

• Lifting lugs are provided for safe installation.

• Roof penetration is sealed from the elements.

8

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

CP-BK IOM - April 2002

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 tothe 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 resultingfrom normal wear and tear. To make a warranty claim, notify Loren Cook Company, General Offices, 2015 East Dale Street, Springfield, Missouri 65803-4637, explaining inwriting, 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 benotified, 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 warrantyadjustment 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 purchaserplacing the fan in service specifically the right. You may have other legal rights which vary from state to state.

Centrifugal Blowers

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

CP-BK

CP-BK

• Periodically rotate the wheel.• Periodically inspect the unit to prevent damaging condi-

tions.

Installation

Motor Installation

Most motors are shipped mounted on the fans with beltsand drives installed. However, extremely heavy motors anddrives are shipped separately. These motors and drives willrequire field installation. Please refer to pages 4.

Personal SafetyDisconnect switches are recommended. Place the

disconnect switch near the fan in order that thepower can be swiftly cut off in case of anemergency, and in order that maintenancepersonnel are provided complete control of thepower source.

ITEMNO.

DESCRIPTION

VENTURI STACK

CURB CAP W/PLENUM INLET BOX

SIDE PEDESTAL COVER

MOTOR MOUNT

MOTOR

HOUSING COVER

BEARINGS (2)

SHAFT - 1"

WEATHER COVER FRONT

WEATHER COVER CAP

WHEEL (STEEL W/ALUMINUM HUB)

INLET CONE - ALUMINUM (W/O FLANGE)

WHEEL HOUSING

PEDESTAL WELDMENT

14

13

12

11

10

9

8

7

6

5

4

3

2

1

CP-BK Parts List

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 condition.

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.•Missing heat shield from inside pedestal.

Overheated Bearings

•Improper bearing lubrication•Excessive belt tension.•Missing heat shield from inside pedestal.

This publication contains the installation, operationand maintenance instructions for standard units of the

CP-BK Kitchen Exhaust Fan

.

• CP-BKCarefully read this publication prior to any installa-

tion or maintenance procedure.

Loren Cook catalog,

CP,

provides additional informationdescribing the equipment, fan performance, availableaccessories, and specification data.

For additional safety information, refer to AMCA publica-tion 410-96,

Safety Practices for Users and Installers ofIndustrial and Commercial Fans

.

All of the publications listed above can be obtained fromLoren Cook Company by phoning 417/869-6474, extension166; by FAX at 417/832-9431; or by e-mail at info@loren-cook.com.

For information on special equipment, contact LorenCook Company Customer Service Department at 417/869-6474.

Receiving and Inspection

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

• Turn the wheel by hand to ensure it turns freely anddoes not bind.

• Record on the

Delivery Receipt

any visible sign of dam-age.

Handling

Lift the fan by the lifting eyes.

Never lift by the shaft,motor, or housing.

Storage

If the fan is stored for any length of time prior to installa-tion, completely fill the bearings with grease or moisture-inhibiting oil (refer to Lubricants on page 5). Rotate thewheel several revolutions every three to five days to keep acoating of grease on all internal bearing parts.

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

Outdoor Storage

To maintain good working condition of the fan when it isstored outdoors, follow the additional instructions below.

• Coat the shaft with grease or a rust preventative com-pound.

• Wrap bearings for weather protection.• Cover the inlet and outlet to prevent the accumulation of

dirt and moisture in the housing.

WARNINGThis 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.

Arrangement 10

a. Mark the position on the shaft of both bearing races,

setscrews, and the wheel and pulley. Mark the location and orientation of the inlet cone. Note the clearance between the wheel and inlet cone.

b. Remove the fan pulley.c. Remove the inlet cone.d. Remove the wheel from the shaft. A 2-jaw puller may

be needed.e. Remove bearing hold-down bolts. Remove shaft and

bearings as one unit.f. Remove the anti-corrosion coating from the shaft with

a suitable solvent.g. Remove the 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.

h. Smooth and clean the shaft and bearing bore thor-oughly.

i. 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.

Do not hammer on the housing.

j. 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

.k. Align the setscrews on the bearings and tighten one

setscrew on each bearing. l. Rotate the shaft to allow the bearing outer rings to find their center of free movement.

m. 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.

n. Tighten hold-down bolts to proper torque.o. Turn the shaft by hand. Resistance should be the

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

p. Tighten bearing setscrews to specified torque. Refer to Torque chart.

q. Re-install the pulley and adjust the belt tension.r. 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 appropriate torque. This assures full locking of the inner race to the shaft. Make sure the socket key or driver is in good condition with no rounded corners. The key should be fully engaged in the setscrew and held squarely to prevent rounding out of the setscrew socket when applying maximum torque.

Changing Shaft Speed

All belt driven fans with motors up to and including 5 HP (184T max.) 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 inthe groove (smaller pitch diameter).

Speed Increase

Close the pulley in order that the belt rides higher inthe groove (larger pitch diameter). Ensure that the RPMlimits of the fan and the horsepower limits of the motorare maintained.

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 exces-sive 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.An emery cloth or file may be needed to remove imper-

fections in the shaft left by the setscrews.

Maximum RPM

CP-BKMaximum RPM

Class I

120 2527

1 foot

1/4 inch

Figure 3

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 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 Wir-ing Diagrams above 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 direc-tion, check the control switch. It is possible to inter-change two leads at this location so that the fan is operating in the correct direction.

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 ten-sion. This will result in a different fan speed than desired.

a. Loosen motor plate adjustment nuts on 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

.

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 draw-ing 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.

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 name-plate.

Lock off all power sources before unit is wired to power source.

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.

Follow the wiring diagram for the disconnect switch (Pages 4 & 5) 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/INLETWHEEL/INLETOVERLAPVERLAP

RADIALRADIALCLEARANCECLEARANCE

OVERLAPVERLAP

Personal SafetyDisconnect switches are recommended. Place

the disconnect switch near the fan in order that thepower can be swiftly cut off in case of an emergency,and in order that maintenance personnel are providedcomplete control of the power source.

72

Backward Inclined

Size Overlap

120 5/8”

Pulley Alignment

Pulley alignment is adjusted by loosening the motor pul-ley setscrew and by moving the motor pulley on the motor shaft or by moving the entire motor along the motor mount-ing bracket.

Figure 4

illustrates correct and incorrect pulley alignment. A recommended method of inspecting the pulley alignment with a square is shown below in

Figure 5

.

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.

Correct Incorrect

Incorrect Incorrect

Figure 4

d. Inspect motor wiring.e. Ensure belt touches only the pulleys.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.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 squeal-

ing).• Improper motor amperage or voltage.

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

30minute, 8 hour

and

24 hour

intervals of satisfactory opera-tion. During the inspections, stop the fan and inspect as perthe

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 asnecessary.

24 Hour Interval

Inspect belt tension, bolts, setscrews, and motor mount-ing bolts. Adjust and tighten as necessary.

Recommended Torque for Setscrews/Bolts (IN/LB.)Setscrews

Hold Down BoltsSize Key Hex

Across Flats

Recommended TorqueInch-lbs.

Min. Max. Size Wrench Torque(inch-lbs)

No.10 3/32” 28 33 3/8”-16 2401/4” 1/8” 66 80 1/2”-13 600

5/16” 5/32” 126 156 5/8”-11 12003/8” 3/16” 228 275 3/4”-10 2100

7/16” 7/32” 348 384 7/8”- 9 20401/2” 1/4” 504 600 1”- 8 30005/8” 5/16” 1104 1200 1-1/8” - 7 42003/4” 3/8” 1440 1800 1-1/4” - 7 6000

36

Conditions ChartRPM Temperature Fan Status Greasing Interval

100 Up to 120˚F Clean 6 to 12 months500 Up to 150˚F Clean 2 to 6 months

1000 Up to 210˚F Clean 2 weeks to 2 months1500 Over 210˚F Clean Weekly

Any Speed Up to 150˚F Dirty 1 week to 1 monthAny Speed Over 150˚F Dirty Daily to 2 weeksAny Speed Any Temperature Very Dirty Daily to 2 weeks

Any Speed Any Temperature ExtremeConditions Daily to 2 weeks

Current Switch Set-UP

General Notes:1. The current sensor is preset at factory.2. The sensor is designed to shut down the broiler in the

event that the motor current drops below normal. This will reflect a problem such as a broken belt.

3. Current sensor shall be enclosed in a (UL Listed forOutdoor Use) conduit box. Wire shall be ran through(UL Listed for Outdoor Use) conduit and connectors.

Notes for Current Sensor:1. Typical operation: Line voltage applied continuously.

After seven seconds of fault, relay trips. If current isbelow set point, red LED will light. Current window isadjustable between 1-10 amps. Adjustments are inde-pendent.

2. Typical setup: Adjust undercurrent pot to minimum,clockwise is maximum. Apply current. Once current hasstabalized, adjust undercurrent pot by turning up until redLED lights. Then turn down within seven seconds until redlight turns off. If a light remains on for more than ten sec-onds, disconnect supply voltage to reset. Fault window var-ies by how far the pots are adjusted. Now if a fault occursfor greater than seven seconds, the relay will trip until sup-ply voltage is removed.

Maintenance

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

Inspect fans exhausting corrosive or contaminated airwithin the first month of operation. Fans exhausting contam-inated air (airborne abrasives) should be inspected everythree months.

Regular inspections are recommended for fans exhaust-ing non-contaminated air.

It is recommended the following inspection be conductedtwice per year.

• Inspect bolts and setscrews for tightness. Tighten as necessary. Worn setscrews should be replaced immedi-ately.

• Inspect belt wear and alignment. Replace worn belts with new belts and adjust alignment as needed. See

Belt and Pulley Installation

, page 3.• Bearings should be inspected as recommended in the

Conditions Chart

.• 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.

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 con-forming to NLGI grade 2 consistency.A 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.

Motor Bearings

Motor bearings are pre-lubricated and sealed. Under nor-mal 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 opera-tion in excessive heat and or in a contaminated airstream consisting of airborne abrasives.

Fan Bearings

Greasable fan bearings are lubricated through a grease fitting on the bearing and should be lubricated by the sched-ule,

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.

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 representa-tive.

Figure 5Figure 5

4 5

Low SpeedLow SpeedLow Speed

High SpeedHigh SpeedHigh Speed

T3T2T1

T11T12T13

MotorL1L2L3

Line

Motor

123

456

Together

High Speed

Line

L1L2L3

123

456

Open

Low Speed

Line

L1L2L3Motor

4 5 6

17

28

39

L1 L2 L3

4 5 6

7 8 9

1 2 3

L1 L2 L3

Low Voltage208/230 Volts

High Voltage460 Volts

3 Phase, 9 Lead MotorY-Connection

7

16

7 8 9

4 5 61 2 3

Low Voltage208/230 Volts

High Voltage460 Volts

8

24

9

35

L1 L3L2

L1 L3L2

3 Phase, 9 Lead MotorDelta-Connection

WIRE MUST MAKE ONEFULL LOOP THROUGH

SENSOR COIL AS INDICATED

REMOVABLEWEATHERCOVER

REMOVABLEBELT GUARD

PLASTIC COVERIS SEALED WITHNEOPRENE GASKET

REMOVABLEPEDESTALMOTORACCESSDOOR

POWER SOURCEFROM STORE

SHOWN OPEN WITHOUTPLASTIC COVER

Wiring Diagrams

When ground is required, attach to ground A or B with no. 6 thread forming screw. To reverse, interchange T-1 and T-4.

Single Speed, Single Phase Motor

To reverse, interchange any 2 line leads.

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-1 and T-4 leads.

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

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

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

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-5 and J-10 leads.

To reverse: High Speed-interchange leads T

11

and T

12

.Low Speed-interchange leads T

1

and T

2

. Both Speeds-interchange any 2 line leads.

T-1

T-4

Ground B

L2

L1

Ground A

Line

Ground A

Ground B

T-1T-4

Low Speed

High Speed

L1L2

Line

Ground B

J-10

T-5

Ground A

Link ALink B

Low Voltage

Line

L2

L1

Ground A

Link A & BL1

L2

Line

Ground B

T-5

J-10

Wiring Diagrams ContinuedWiring Diagrams

AT THE MACHINE ON THE ROOF CURRENTSENSOR

1 2 3 4 5

LOOPONCE

RED LED

FAN MOTOR

NEUTRAL

HOT HOT

NEUTRAL

FAN DISCONNECT

INSIDE THE STORE

BROILER CONTACTOR

HOT

NEUTRAL

FAN MAIN SWITCH

NEUTRALNEUTRAL

HOTHOT

208 VOLTSSINGLE PHASE

ADJUSTMENT POTS

Current Switch Set-Up Diagram (Sensor Wiring ONLY)

ITEM QTY. P/N DESCRIPTION15 AS REQD - WIRE, BLK, GRN, WHT 14 AWG. 19 STRAND, ANY TYPE, THHN, THWN, MTW, AWN14 2 125300 WIRE CONNECTOR (WIRE NUT)13 6 137320 SPEED SCREW, HEX WASHER HEAD, BSD TYPE12 2 137548 6-32, WIZZNUT11 2 137485 6-32 X 1 1/2, COUNTERSUNK FLATHEAD MACHINE SCREW10 4 125334 LOCKING FORK TERMINAL9 1 132408 2-POLE SINGLE CURRENT SWITCH, 120-277 VOLT, 20 AMP8 4 125312 SINGLE-WIRE FEMALE FLAG QUICK CONNECT7 1 132115 CURRENT SENSOR, 208 VOLT, 10 AMP6 1 125605 1/2” 90

O

ELBOW FITTING, LIQUID TIGHT, ZINC PLATED, CAST METAL5 1 125645 1/2” STRAIGHT FITTING, LIQUID TIGHT, ZINC PLATED, CAST METAL4 1 125105 LIQUID TIGHT, EF 1/2”, FLEXIBLE CONDUIT (OUTDOOR USE UL APPROVED)3 1 125347 NEMA 4, JUNCTION BOX, 4” X 4” X 2” GREY, PVC (OUTDOOR USE UL APPROVED)2 1 125416 NEMA 3, DISCONNECT SWITCH COVER1 1 125415 NEMA 3, DISCONNECT SWITCH, 1/2” 3 HOLE, SINGLE GANG DEEP, CAST METAL

4 5

Low SpeedLow SpeedLow Speed

High SpeedHigh SpeedHigh Speed

T3T2T1

T11T12T13

MotorL1L2L3

Line

Motor

123

456

Together

High Speed

Line

L1L2L3

123

456

Open

Low Speed

Line

L1L2L3Motor

4 5 6

17

28

39

L1 L2 L3

4 5 6

7 8 9

1 2 3

L1 L2 L3

Low Voltage208/230 Volts

High Voltage460 Volts

3 Phase, 9 Lead MotorY-Connection

7

16

7 8 9

4 5 61 2 3

Low Voltage208/230 Volts

High Voltage460 Volts

8

24

9

35

L1 L3L2

L1 L3L2

3 Phase, 9 Lead MotorDelta-Connection

WIRE MUST MAKE ONEFULL LOOP THROUGH

SENSOR COIL AS INDICATED

REMOVABLEWEATHERCOVER

REMOVABLEBELT GUARD

PLASTIC COVERIS SEALED WITHNEOPRENE GASKET

REMOVABLEPEDESTALMOTORACCESSDOOR

POWER SOURCEFROM STORE

SHOWN OPEN WITHOUTPLASTIC COVER

Wiring Diagrams

When ground is required, attach to ground A or B with no. 6 thread forming screw. To reverse, interchange T-1 and T-4.

Single Speed, Single Phase Motor

To reverse, interchange any 2 line leads.

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-1 and T-4 leads.

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

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

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

When ground required, attach to ground A or B with No. 6 thread forming screw. To reverse, interchange T-5 and J-10 leads.

To reverse: High Speed-interchange leads T

11

and T

12

.Low Speed-interchange leads T

1

and T

2

. Both Speeds-interchange any 2 line leads.

T-1

T-4

Ground B

L2

L1

Ground A

Line

Ground A

Ground B

T-1T-4

Low Speed

High Speed

L1L2

Line

Ground B

J-10

T-5

Ground A

Link ALink B

Low Voltage

Line

L2

L1

Ground A

Link A & BL1

L2

Line

Ground B

T-5

J-10

Wiring Diagrams ContinuedWiring Diagrams

AT THE MACHINE ON THE ROOF CURRENTSENSOR

1 2 3 4 5

LOOPONCE

RED LED

FAN MOTOR

NEUTRAL

HOT HOT

NEUTRAL

FAN DISCONNECT

INSIDE THE STORE

BROILER CONTACTOR

HOT

NEUTRAL

FAN MAIN SWITCH

NEUTRALNEUTRAL

HOTHOT

208 VOLTSSINGLE PHASE

ADJUSTMENT POTS

Current Switch Set-Up Diagram (Sensor Wiring ONLY)

ITEM QTY. P/N DESCRIPTION15 AS REQD - WIRE, BLK, GRN, WHT 14 AWG. 19 STRAND, ANY TYPE, THHN, THWN, MTW, AWN14 2 125300 WIRE CONNECTOR (WIRE NUT)13 6 137320 SPEED SCREW, HEX WASHER HEAD, BSD TYPE12 2 137548 6-32, WIZZNUT11 2 137485 6-32 X 1 1/2, COUNTERSUNK FLATHEAD MACHINE SCREW10 4 125334 LOCKING FORK TERMINAL9 1 132408 2-POLE SINGLE CURRENT SWITCH, 120-277 VOLT, 20 AMP8 4 125312 SINGLE-WIRE FEMALE FLAG QUICK CONNECT7 1 132115 CURRENT SENSOR, 208 VOLT, 10 AMP6 1 125605 1/2” 90

O

ELBOW FITTING, LIQUID TIGHT, ZINC PLATED, CAST METAL5 1 125645 1/2” STRAIGHT FITTING, LIQUID TIGHT, ZINC PLATED, CAST METAL4 1 125105 LIQUID TIGHT, EF 1/2”, FLEXIBLE CONDUIT (OUTDOOR USE UL APPROVED)3 1 125347 NEMA 4, JUNCTION BOX, 4” X 4” X 2” GREY, PVC (OUTDOOR USE UL APPROVED)2 1 125416 NEMA 3, DISCONNECT SWITCH COVER1 1 125415 NEMA 3, DISCONNECT SWITCH, 1/2” 3 HOLE, SINGLE GANG DEEP, CAST METAL

Pulley Alignment

Pulley alignment is adjusted by loosening the motor pul-ley setscrew and by moving the motor pulley on the motor shaft or by moving the entire motor along the motor mount-ing bracket.

Figure 4

illustrates correct and incorrect pulley alignment. A recommended method of inspecting the pulley alignment with a square is shown below in

Figure 5

.

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.

Correct Incorrect

Incorrect Incorrect

Figure 4

d. Inspect motor wiring.e. Ensure belt touches only the pulleys.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.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 squeal-

ing).• Improper motor amperage or voltage.

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

30minute, 8 hour

and

24 hour

intervals of satisfactory opera-tion. During the inspections, stop the fan and inspect as perthe

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 asnecessary.

24 Hour Interval

Inspect belt tension, bolts, setscrews, and motor mount-ing bolts. Adjust and tighten as necessary.

Recommended Torque for Setscrews/Bolts (IN/LB.)Setscrews

Hold Down BoltsSize Key Hex

Across Flats

Recommended TorqueInch-lbs.

Min. Max. Size Wrench Torque(inch-lbs)

No.10 3/32” 28 33 3/8”-16 2401/4” 1/8” 66 80 1/2”-13 600

5/16” 5/32” 126 156 5/8”-11 12003/8” 3/16” 228 275 3/4”-10 2100

7/16” 7/32” 348 384 7/8”- 9 20401/2” 1/4” 504 600 1”- 8 30005/8” 5/16” 1104 1200 1-1/8” - 7 42003/4” 3/8” 1440 1800 1-1/4” - 7 6000

36

Conditions ChartRPM Temperature Fan Status Greasing Interval

100 Up to 120˚F Clean 6 to 12 months500 Up to 150˚F Clean 2 to 6 months

1000 Up to 210˚F Clean 2 weeks to 2 months1500 Over 210˚F Clean Weekly

Any Speed Up to 150˚F Dirty 1 week to 1 monthAny Speed Over 150˚F Dirty Daily to 2 weeksAny Speed Any Temperature Very Dirty Daily to 2 weeks

Any Speed Any Temperature ExtremeConditions Daily to 2 weeks

Current Switch Set-UP

General Notes:1. The current sensor is preset at factory.2. The sensor is designed to shut down the broiler in the

event that the motor current drops below normal. This will reflect a problem such as a broken belt.

3. Current sensor shall be enclosed in a (UL Listed forOutdoor Use) conduit box. Wire shall be ran through(UL Listed for Outdoor Use) conduit and connectors.

Notes for Current Sensor:1. Typical operation: Line voltage applied continuously.

After seven seconds of fault, relay trips. If current isbelow set point, red LED will light. Current window isadjustable between 1-10 amps. Adjustments are inde-pendent.

2. Typical setup: Adjust undercurrent pot to minimum,clockwise is maximum. Apply current. Once current hasstabalized, adjust undercurrent pot by turning up until redLED lights. Then turn down within seven seconds until redlight turns off. If a light remains on for more than ten sec-onds, disconnect supply voltage to reset. Fault window var-ies by how far the pots are adjusted. Now if a fault occursfor greater than seven seconds, the relay will trip until sup-ply voltage is removed.

Maintenance

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

Inspect fans exhausting corrosive or contaminated airwithin the first month of operation. Fans exhausting contam-inated air (airborne abrasives) should be inspected everythree months.

Regular inspections are recommended for fans exhaust-ing non-contaminated air.

It is recommended the following inspection be conductedtwice per year.

• Inspect bolts and setscrews for tightness. Tighten as necessary. Worn setscrews should be replaced immedi-ately.

• Inspect belt wear and alignment. Replace worn belts with new belts and adjust alignment as needed. See

Belt and Pulley Installation

, page 3.• Bearings should be inspected as recommended in the

Conditions Chart

.• 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.

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 con-forming to NLGI grade 2 consistency.A 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.

Motor Bearings

Motor bearings are pre-lubricated and sealed. Under nor-mal 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 opera-tion in excessive heat and or in a contaminated airstream consisting of airborne abrasives.

Fan Bearings

Greasable fan bearings are lubricated through a grease fitting on the bearing and should be lubricated by the sched-ule,

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.

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 representa-tive.

Figure 5Figure 5

Arrangement 10

a. Mark the position on the shaft of both bearing races,

setscrews, and the wheel and pulley. Mark the location and orientation of the inlet cone. Note the clearance between the wheel and inlet cone.

b. Remove the fan pulley.c. Remove the inlet cone.d. Remove the wheel from the shaft. A 2-jaw puller may

be needed.e. Remove bearing hold-down bolts. Remove shaft and

bearings as one unit.f. Remove the anti-corrosion coating from the shaft with

a suitable solvent.g. Remove the 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.

h. Smooth and clean the shaft and bearing bore thor-oughly.

i. 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.

Do not hammer on the housing.

j. 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

.k. Align the setscrews on the bearings and tighten one

setscrew on each bearing. l. Rotate the shaft to allow the bearing outer rings to find their center of free movement.

m. 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.

n. Tighten hold-down bolts to proper torque.o. Turn the shaft by hand. Resistance should be the

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

p. Tighten bearing setscrews to specified torque. Refer to Torque chart.

q. Re-install the pulley and adjust the belt tension.r. 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 appropriate torque. This assures full locking of the inner race to the shaft. Make sure the socket key or driver is in good condition with no rounded corners. The key should be fully engaged in the setscrew and held squarely to prevent rounding out of the setscrew socket when applying maximum torque.

Changing Shaft Speed

All belt driven fans with motors up to and including 5 HP (184T max.) 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 inthe groove (smaller pitch diameter).

Speed Increase

Close the pulley in order that the belt rides higher inthe groove (larger pitch diameter). Ensure that the RPMlimits of the fan and the horsepower limits of the motorare maintained.

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 exces-sive 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.An emery cloth or file may be needed to remove imper-

fections in the shaft left by the setscrews.

Maximum RPM

CP-BKMaximum RPM

Class I

120 2527

1 foot

1/4 inch

Figure 3

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 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 Wir-ing Diagrams above 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 direc-tion, check the control switch. It is possible to inter-change two leads at this location so that the fan is operating in the correct direction.

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 ten-sion. This will result in a different fan speed than desired.

a. Loosen motor plate adjustment nuts on 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

.

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 draw-ing 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.

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 name-plate.

Lock off all power sources before unit is wired to power source.

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.

Follow the wiring diagram for the disconnect switch (Pages 4 & 5) 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/INLETWHEEL/INLETOVERLAPVERLAP

RADIALRADIALCLEARANCECLEARANCE

OVERLAPVERLAP

Personal SafetyDisconnect switches are recommended. Place

the disconnect switch near the fan in order that thepower can be swiftly cut off in case of an emergency,and in order that maintenance personnel are providedcomplete control of the power source.

72

Backward Inclined

Size Overlap

120 5/8”

8

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

CP-BK IOM - April 2002

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 tothe 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 resultingfrom normal wear and tear. To make a warranty claim, notify Loren Cook Company, General Offices, 2015 East Dale Street, Springfield, Missouri 65803-4637, explaining inwriting, 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 benotified, 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 warrantyadjustment 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 purchaserplacing the fan in service specifically the right. You may have other legal rights which vary from state to state.

Centrifugal Blowers

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

CP-BK

CP-BK

• Periodically rotate the wheel.• Periodically inspect the unit to prevent damaging condi-

tions.

Installation

Motor Installation

Most motors are shipped mounted on the fans with beltsand drives installed. However, extremely heavy motors anddrives are shipped separately. These motors and drives willrequire field installation. Please refer to pages 4.

Personal SafetyDisconnect switches are recommended. Place the

disconnect switch near the fan in order that thepower can be swiftly cut off in case of anemergency, and in order that maintenancepersonnel are provided complete control of thepower source.

ITEMNO.

DESCRIPTION

VENTURI STACK

CURB CAP W/PLENUM INLET BOX

SIDE PEDESTAL COVER

MOTOR MOUNT

MOTOR

HOUSING COVER

BEARINGS (2)

SHAFT - 1"

WEATHER COVER FRONT

WEATHER COVER CAP

WHEEL (STEEL W/ALUMINUM HUB)

INLET CONE - ALUMINUM (W/O FLANGE)

WHEEL HOUSING

PEDESTAL WELDMENT

14

13

12

11

10

9

8

7

6

5

4

3

2

1

CP-BK Parts List

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 condition.

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.•Missing heat shield from inside pedestal.

Overheated Bearings

•Improper bearing lubrication•Excessive belt tension.•Missing heat shield from inside pedestal.

This publication contains the installation, operationand maintenance instructions for standard units of the

CP-BK Kitchen Exhaust Fan

.

• CP-BKCarefully read this publication prior to any installa-

tion or maintenance procedure.

Loren Cook catalog,

CP,

provides additional informationdescribing the equipment, fan performance, availableaccessories, and specification data.

For additional safety information, refer to AMCA publica-tion 410-96,

Safety Practices for Users and Installers ofIndustrial and Commercial Fans

.

All of the publications listed above can be obtained fromLoren Cook Company by phoning 417/869-6474, extension166; by FAX at 417/832-9431; or by e-mail at info@loren-cook.com.

For information on special equipment, contact LorenCook Company Customer Service Department at 417/869-6474.

Receiving and Inspection

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

• Turn the wheel by hand to ensure it turns freely anddoes not bind.

• Record on the

Delivery Receipt

any visible sign of dam-age.

Handling

Lift the fan by the lifting eyes.

Never lift by the shaft,motor, or housing.

Storage

If the fan is stored for any length of time prior to installa-tion, completely fill the bearings with grease or moisture-inhibiting oil (refer to Lubricants on page 5). Rotate thewheel several revolutions every three to five days to keep acoating of grease on all internal bearing parts.

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

Outdoor Storage

To maintain good working condition of the fan when it isstored outdoors, follow the additional instructions below.

• Coat the shaft with grease or a rust preventative com-pound.

• Wrap bearings for weather protection.• Cover the inlet and outlet to prevent the accumulation of

dirt and moisture in the housing.

WARNINGThis 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.