Loren Cook AQB24 Installation Manual

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Page 1

AQ/SEP/ETE/ETS

Propeller Roof Fans

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation

and maintenance procedures for standard units of the

AQ/SEP/ETE/ETS - Propeller Roof Fans.

Carefully read this publication prior to any installa-

tion or maintenance procedure.

Loren Cook catalog, tional information describing the equipment, fan performance, available accessories and speciﬁcation data.

For additional safety information, refer to AMCA publication 410-96,

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 and instructions on special equipment, contact Loren Cook Company at 417/869-6474.

Safety Practices for Users and Installers of

Propeller Roof Fans

, provides addi-

Receiving and Inspection

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

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

• Check dampers (if included) for free operation of all moving parts.

• Record on the damage.

Delivery Receipt

any visible sign of

Handling

Lift the fan by the base or by the shipping carton. Never

lift by the shaft, motor or housing.

If your fan is covered with a protective coating (e.g., phe-

nolic enamels, or other protective coatings), handle with

extreme care . Even a small chip will break the coating’s

continuity and destroy its ability to protect the metal.

Propellers are carefully balanced to give smooth, vibration-free operation. If the propeller is damaged during handling, it will require rebalancing.

WARNING

This unit has rotating parts. Safety precautions should be exercised at all times during installation, operation, and maintenance. ALWAYS disconnect power prior to working on fan.

To maintain good working condition of the fan when it is stored outdoors or at a construction site, follow the additional instructions below.

• Coat the shaft and bearings with grease or rust preventative compound to help seal out moisture.

• Periodically rotate the propeller and operate the dampers (if supplied) to keep a coating of grease on all internal bearing parts.

• Periodically inspect the fan to prevent damaging conditions.

• Block propeller to prevent natural rotation.

• Cover the unit with some type of weather cover to prevent moisture, corrosion, dirt or dust accumulation.

Personal Safety

Disconnect switches are recommended. Place the disconnect switch near the fan in order that the power can be swiftly cut off in case of an emergency, and in order that maintenance personnel are provided complete control of the power source.

Installation

Damper Installation

If your fan is supplied with dampers, follow the directions

below. If your fan does not include dampers, proceed to

Motor Installation

a. Place the damper inside the curb. Ensure the damper

will open freely for the correct direction of the airﬂow.

b. Secure to curb at the damper shelf by installing at least

two sheet metal screws (#10 x 1/2”) on each side of the damper, through the tray, with the screw head catching the ﬂange on the damper. This will prevent the exhaust dampers from lifting and keep the supply dampers centered.

Damper Installation continued

Storage

If the fan is stored for any length of time prior to installation, store it in its original shipping crate and protect it from dust, debris and the weather.

Outdoor Storage

SEP/AQD

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c. Drill a hole in the curb shelf for conduit needed for

motor wiring.

d. Operate the dampers manually to ensure the blades

move freely. Dampers should be released from full open position to check for proper closing.

1/4 inch

1 foot

Figure 1

Motor Installation (Belt Drive fans)

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 ﬁeld mounted.

a. Remove the motor plate mounting bolts and the motor

plate.

b. Remove the motor mounting bolts from the motor

plate.

c. Mount the motor to the motor plate aligning to the

appropriate holes.

d. Place the motor plate on the power assembly and rein-

stall the mounting bolts.

Correct

Incorrect

c. Lock the motor plate adjustment nuts

in place.

d. Ensure pulleys are properly aligned.

Refer to

Figure 2

Pulley Alignment

Pulley alignment is adjusted by loosening the motor pulley setscrew and by moving the motor pulley on the motor shaft or by moving the entire motor along the motor mounting bracket.

Figure 2

illustrates correct and incorrect pulley alignment.

Figure 3

A recommended method of inspecting the pulley alignment is shown in

Figure 3

. With the shorter leg of a carpenter’s square or other straight edge lying along the case of the motor, adjust the position of the motor pulley (or the motor) until the longer leg of the square is parallel to the belt.

Wiring Installation

All wiring should be in accordance with local ordinances and the National Electrical Code, NFPA 70. Ensure the power supply (voltage, frequency, and current carrying capacity of wires) is in accordance with the motor nameplate. Refer to the

Wiring Diagrams

on page 3.

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.

Personal Safety

Incorrect Incorrect

Figure 2

Belt and Pulley Installation

If your fan is a direct drive, proceed to

Wiring Installation

Belt tension is determined by the sound of the belts when the fan is ﬁrst started. The belts will produce a loud squeal, which dissipates after the fan is operating at full capacity. If belt tension is too tight or too loose, lost efﬁciency and damage can occur.

Do not change the pulley pitch diameter to change tension. The change will result in a different fan speed.

a. 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 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 1

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).

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.

Place fan over roof opening. Secure the fan with lag screws, anchor bolts, or other suitable fasteners.

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

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

Hold Down Bolts

Wrench

Torque

Page 3

Wiring Diagrams

Single Speed, Single Phase Motor

Ground A

T- 1

T- 4

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

Line L

Wiring Diagrams

3 Phase, 9 Lead Motor

Low Voltage

208/230 Volts

728

L2L

To reverse, interchange any 2 line leads.

High Voltage

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

Ground A

T- 1

T- 4

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

High Speed

Low Speed

Line

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

Motor

High Speed

Together

2 3

5 6

1 2

Line

Motor

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

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

Low Speed

Motor

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

High Speed High Speed High Speed

and T

. Both Speeds-interchange any 2

Typical Damper Motor Schematic

460 Volts

456

789

L2L

Low Speed

and T

3 4

5 6

Line

Open

Line

Fan

Motor

Transformer**

Damper

Motor*

Second Damper

Motor

Transformer**

L3 L2 L1

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

. For single phase application, disregard L

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.

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 below,

Recommended Torque for Setscrews/Bolts

b. Inspect for correct voltage with voltmeter.

c. Ensure all accessories are installed.

d. Test the fan to be sure the rotation is the same as indi-

cated by the arrow marked Rotation .

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.

and

. *Damper motors may be

Operation

Pre-Start Checks

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

used for mounting the unit, and tighten if necessary.

c. Inspect belt tension and pulley alignment. (Remember,

if belt tension is correct, a loud squeal occurs as the fan increases to full power.)

d. Inspect motor wiring.

e. Ensure the belt touches only the pulleys.

f. Rotate the propeller to ensure it does not rub against

the base. g. Ensure fan and ductwork are clean and free of debris. h. Test the fan to ensure the rotation of the propeller is the

same as indicated by the rotation label.

i. Restore power to unit.

Page 4

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.

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

Troubleshooting,

page 5.

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 chart below.

30 Minute Interval

Inspect bolts, setscrews, and motor mounting bolts.

Adjust and tighten as necessary.

8 Hour Interval

Inspect belt alignment and tension. Adjust and tighten as

necessary.

24 Hour Interval

Inspect belt tension. Adjust and tighten as necessary.

WARNING Disconnect power before checking and cleaning

ﬁlters. Inadvertent operation of the fan could pull objects from the roof into the propeller.

Filter

If you fan is not supplied with ﬁlters proceed to

nance

Inspect ﬁlters within the ﬁrst two weeks of operation. If there is no excessive build-up, monthly servicing should be adequate.

To clean reusable aluminum ﬁlters, back ﬂush with soap and water. When clean, shake off excess water and allow the ﬁlter to air-dry before reinstalling it.

Mainte-

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. Clean the propeller and air inlets if material 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 lithium base conforming to NLGI grade 2 consistency. Other grades of grease should not be used unless the bearings and lines have been ﬂushed clean. If another grade of grease is used, it should be lithium-based.

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.

Motor Bearings

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

Conditions Chart

RPM Temperature

100 Up to 120˚F Clean 6 to 12 months

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

Any

Speed

Any

Speed

Any

Speed

Any

Speed

Up to 150˚F Dirty 1 week to 1 month

Over 150˚F Dirty Daily to 2 weeks

Any Temperature Very Dirty Daily to 2 weeks

Any Temperature

Fan

Status

Extreme

Conditions

Greasing

Interval

Daily to 2 weeks

Fan Bearings

Fan bearings are lubricated through a grease connector

and should be lubricated by the schedule,

Chart

, shown above.

Conditions

For best results, lubricate the bearing while the fan is rotating. Slowly pump grease into the bearing until a slight bead forms around the bearing seals. Excessive grease can burst seals thus reduce 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 representative.

Page 5

Changing Shaft Speed

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

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

key, if equipped.

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

the pulley has multiple grooves, all must be adjusted to the same width.

c. After adjustment, inspect for proper belt tension.

Speed Reduction

Open the pulley in order that the belt rides deeper in the groove (smaller pitch diameter).

Speed Increase

Close the pulley in order that the belt rides higher in the groove (larger pitch diameter). Ensure that the RPM limits of the fan and the horsepower limits of the motor are maintained.

Pulley and Belt Replacement

a. Clean the motor and fan shafts.

b. Loosen the motor plate mounting bolts to relieve the

belt tension. Remove the belt.

c. Loosen the pulley setscrews and remove the pulleys

from the shaft.

If excessive force is required to remove the pulleys, a three-jaw puller can be used. This tool, however, can easily warp a pulley. If the puller is used, inspect the trueness of the pulley after it is removed from the shaft. The pulley will need replacement if it is more than 0.020 inch out of true.

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

oil on the bores.

e. Remove grease, rust and burrs from the shaft.

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

on the motor shaft. Damage to the pulleys can occur when excessive force is used in placing the pulleys on their respective shafts.

g. After the pulleys have been correctly placed back onto

their shafts, tighten the pulley setscrews.

h. Install the belts on the pulleys. Align and adjust the

belts to the proper tension as described in

ley Installation

, page 2.

Belt and Pul-

Bearing Replacement

The fan bearings are pillow block ball bearings. a. Remove the top cap to gain access to the fan. b. Loosen the motor plate mounting bolts and remove the

drive belts.

c. Remove the propeller from the shaft. d. Remove the four (4) bearing hold-down bolts and then

remove the shaft and bearings from the fan as an assembly.

e. Measure and record the location of the bearings on the

shaft. This will aid the reassembly.

f. Loosen the bearing setscrews and remove the bear-

ings from the shaft.

g. Remove any imperfections in the shaft using a smooth

ﬁle or emery cloth.

h. Place new bearings on the shaft.

i. Locate one of the bearings using the previous mea-

surements and tighten one setscrew.

j. Install the propeller on the shaft. Center the propeller in

the opening and tighten the bearing bolts.

k. Rotate the propeller to allow the bearings to ﬁnd their

center of free movement.

l. Align the bearing setscrews and tighten to proper

torque. Refer to the

Torque chart

on page 2.

m. Reassemble drive assembly and replace top cap.

Propeller and Shaft Replacement Precautions

• If the shaft is dropped and bent, it may cause unbalanced operation of the fan.

• When handling the propeller separately from the shaft, place a support through the hub for lifting, making sure not to injure the ﬁnished bore of the propeller.

• Never allow the propeller to rest its entire weight on the blades. The propeller and shaft can be lifted by slings around the shaft on each side of the propeller so the propeller is supported by its hub.

• If using a chain to lift the propeller, make sure there is sufﬁcient padding on the shaft and propeller. This prevents the scoring of the shaft or injury to the propeller. The chain or cable should be spread with timbers, or braced by some other method to prevent damage to the propeller side plates.

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 propeller alignment.

Excessive Vibration and Noise

•Damaged or unbalanced propeller.

•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 Bearings

•Improper bearing lubrication

•Excessive belt tension.

Page 6

AQB/SEP Parts List

1617

AQB

SEP

7 8

Parts

No.

10 3/8” Bolt (4) 3/8” Bolt (8) 11 Bearings (2) Bearings (2) 12 Cast Propeller Assembly Cast Propeller Assembly 13 Motor Plate Motor Plate 14 Base Base 15 Venturi Venturi 16 17 Bafﬂe Brake Bafﬂe Brake 18 Isolators (4) Isolators (4) 19 Motor Motor

Size 24 Size 30 Size 36 Size 42 Size 48

1 Bafﬂe Bafﬂe 2 Driver Sheave Driver Sheave 3 Belt Set Belt Set 4 Driven Sheave Driven Sheave 5 6 Shaft Shaft 7 Birdscreen Birdscreen 8 Power Assembly Power Assembly 9 3/8” Nut (4) 3/8” Nut (8)

Upper Post (4)

Lower Posts(4)

Description

Upper Post (8) Upper Post (8)

Lower Post (4)

AQD Parts List

Size 12

Size 16-24

Parts

No.

1 Bafﬂe Bafﬂe 2 5/16” Bolt (12) 5/16” Bolt (12) 3 Upper Post (4) Upper Post (4) 4 Birdscreen Birdscreen 5 — — Lower Post (4) 6 5/16” Nut (4) 5/16” Nut (4) 7 Motor Motor 8 Propeller Propeller

9 — Motor Plate Motor Plate 10 Base Base 11 Venturi Venturi 12 Isolator (4) Isolator (4) 13 Power Assembly Power Assembly

Size 12 Size 16 Size 20 Size 24

Description

Page 7

ETE/ETS Parts List

ETE

Parts No.

1 Top Cap Top Cap 2 Motor Motor 3 Driver Sheave Driver Sheave 4 Belt Set Belt Set 5 Driven Sheave Driven Sheave 6 Bearings (2) Bearings (2) 7 Power Assembly Power Assembly 8 Propeller Propeller

9 Base Base 10 Shaft Shaft 11 Motor Plate Motor Plate 12 Tiered Hood Tiered Hood 13 — Filters

ETE Sizes 24-60 ETS Sizes 24-60

Description

ETS

Page 8

Limited Warranty

Loren Cook Company warrants that your Loren Cook fan was manufactured free of defects in materials and workmanship, to the extent stated herein. For a period of one (1)

year after date of shipment, we will replace any parts found to be defective without charge, except for shipping costs which will be paid by you.

This warranty is granted only to the original purchaser placing the fan in service. This warranty is void if the fan or any part thereof has been altered or modified from its original design or has been abused, misused, damaged or is in worn condition or if

the fan has been used other than for the uses described in the company manual. This warranty does not cover defects resulting from normal wear and tear.

To make a warranty claim, notify Loren Cook Company, General Offices, 2015 East Dale Street, Springfield, Missouri 65803-4637, explaining in writing, in detail, your complaint and referring to the specific model and serial numbers of your fan. Upon receipt by Loren Cook Company of your written complaint, you will be notified, within thirty (30) days of our receipt of your complaint, in writing, as to the manner in which your claim will be handled. If you are entitled to warranty relief, a warranty adjustment will be completed within sixty (60) business days of the receipt of your written complaint by Loren Cook Company.

This warranty gives only the original purchaser placing the fan in service specifically the right. You may have other legal rights which vary from state to state.

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

www.lorencook.com

AQ/SEP/ETE/ETS IOM - January1999