Loren Cook ACSC Installation Manual

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ACSC

Smoke Control Ventilator

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

This publication contains the installation, operation and mainte-

nance instructions for standard units of the ACSC-Smoke Control

Ventilator .

• ACSC/ACSC-HP/ACSC-XP

Carefully read this publication prior to any installation or main-

tenance procedure.

Loren Cook catalog, AC , provides additional information describing

the equipment, fan performance, available accessories, and speciﬁca- tion data.

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

Safety Practices for Users and Installers of Industrial and Commercial Fans .

All of the publications listed above can be obtained from Loren Cook Company by phoning (417)869-6474, extension 166; by FAX at (417)832-9431; or by e-mail at info@lorencook.com.

For information and instructions on special equipment, contact Loren Cook Company at (417)869-6474.

Receiving and Inspection

Immediately upon receipt of an AC fan, carefully inspect the fan and accessories for damage and shortage.

• Turn the wheel 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 shipping carton or lifting lugs provided under top cap. Never lift by the shaft, motor or housing.

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.

Damper

Use of any backdraft dampers is NOT permitted. Fire dampers and/or smoke dampers may be required in a smoke control system. These dampers must meet the requirements determined by the local code authority.

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.

Installation

If the fan was delivered with the motor unmounted, see the mainte-

nance section for belt and pulley installation.

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 , next page.

Lock off all power sources before the fan is wired to power

source.

Leave enough slack in the wiring to allow for motor movement when adjusting belt tension. Some fractional motors have to be removed in order to make the connection with the terminal box at the end of the motor.

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.

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).

Final Installation Steps

a. Ensure fasteners and set screws, particularly fan mounting and

bearing fasteners are tightened according to the recommended

Lifting Lugs

torque shown in the table on page 2, Recommended Torque for

Setscrews/Bolts.

b. Inspect for correct amperage with an ammeter and correct voltage

with a voltmeter. c. Ensure that all accessories are installed. d. Test the fan to be sure the rotation is the same as indicated 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.

e. Inspect wheel-to-inlet clearance. Wheels may shift in shipment. To

realign wheel-to-inlet, shift upper bearing so there is an equal radial clearance between the wheel and inlet.

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.

ACSC fan is intended for general ventilation, and is UL listed for

Smoke Control Systems. The fan should not be used to exhaust corrosive or contaminated air.

Regular, twice per year, inspections are recommended and may be

required per local codes.

Contact the local code authority for inspection requirements.

• Inspect bolts and setscrews for tightness. Tighten as necessary. Refer to Torque chart .

• Inspect belt wear and alignment. Replace worn belts with new belts and adjust alignment as needed. Refer to Belt and Pulley Installa-

tion, page 3.

• 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.

Operation Pre-Start Checks

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

mounting and bearing fasteners Refer to Torque chart .

c. Inspect belt tension and pulley alignment. Refer to Belt and Pulley

Installation , page 3.

d. Inspect motor wiring. Refer to Wiring Installation . e. Ensure belt touches only the pulleys. f. Rotate the wheel to ensure it rotates freely. g. Ensure fan and ductwork are clean and free of debris. h. Close and secure all access doors. i. Restore power to fan.

ACSC

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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, inter-

change T-1 and T-4.

Line

2 Speed, 2 Winding, Single Phase Motor

Ground A

T-1 T-4

Ground B

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

High Speed

Low Speed

Line

Single Speed, Single Phase, Dual Voltage

Ground A

Line

T-5

J-10

Ground B

T-5

J-10

Ground B

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

Link A Link B

Low Voltage

Ground A

Link A & B

Line

Start-up

Turn on the fan. 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 squealing)

• 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. Refer to

Troubleshooting on page 4.

Inspection

Inspection of the fan should be conducted at the first 30 minute , 8

hour and 24 hour intervals of satisfactory operation. During the inspec-

tions, stop the fan and inspect as instructed.

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.

Recommended Torque for Setscrews/Bolts (IN/LB)

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” 29 348 7/8”-9 2040

1/2” 1/4” 42 504

5/8” 5/16” 92 1104

3/4” 3/8” 120 1440

Setscrews

Key Hex

Across

Flats

Recommended

Min. Max. Size

Hold Down Bolts

Wrench

Torque

3 Phase, 9 Lead Motor Y-Connection

Low Voltage

208/230 Volts

728

L2L

High Voltage

460 Volts

456

789

L2L

3 Phase, 9 Lead Motor Delta-Connection

Low Voltage

208/230 Volts

9 5 3

High Voltage

460 Volts

789

456

L1L

To reverse, interchange any 2 line leads.

2 Speed, 1 Winding, 3 Phase Motor

Motor

Low Speed

Open

Lin

High Speed

Together

Motor

Line

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

2 Speed, 2 Winding, 3 Phase

Low Speed

Motor

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

High Speed

and T

. Both Speeds-interchange any 2

and T

Line

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 or in a contaminated airstream consisting of airborne abrasives.

Fan Bearings

Fan bearings are lubricated through a grease connector and should be lubricated by the schedule, Conditions Chart.

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.

Conditions Chart

RPM Temperature Fan Status Greasing Interval

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

Extreme

Conditions

Daily to 2 weeks

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Motor Services

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

Changing Shaft Speed

All belt driven ventilators (5HP or less) are equipped with variable pitch pulleys. To change 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.

Maximum RPM

ACSC

Size

100 2002 120 1671 135 1574 150 1520 165 1295 180 1546 195 1353 210 1197 225 1086 245 901 270 766 300 837 877 330 716 748 365 624 659

Maximum RPM

Standard Reinforced

Replacing Pulleys and Belts

a. Clean the motor and fan

shafts.

b. Loosen the motor plate

mounting bolts to relieve the belt tension. Remove the belt.

ACSC-HP

Size

150 1952 165 1728 180 1829 195 1570 210 1626 225 1435 245 1185 1234 270 1025 1049 300 980 1046 330 830 912 365 735 872

ACSC-XP

Size

165 2508 180 2396 195 2100 210 2126 225 1879 245 1616 270 1656 300 1391 330 1182 365 1132

Maximum RPM

Standard Reinforced

Maximum RPM

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 any grease, rust or burrs from pul-

leys.

f. Place the 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 plac-

1/4 inch

ing the pulleys on their respective shafts.

1 foot

g. After the pulleys have been cor-

rectly placed back onto their shafts, tighten the pulley setscrews.

Figure 1

Belt and Pulley 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 may occur.

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

a. Loosen motor plate adjustment bolts and slide motor plate so that

belts easily slip into the grooves on the pulleys. Never pry, roll, or force the belts over the rim of the pulley.

b. Slide 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 . c. Lock the motor plate adjustment bolts 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.

Figure 2 illustrates correct and incorrect pulley alignment. A recom-

mended 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.

Correct

Incorrect Incorrect

Figure 2

Incorrect

Bearing Replacement

The fan bearings are pillow block type ball bearings.

a. Remove the old bearing.

b. Remove any burrs from the shaft by sanding.

c. Slide new bearings onto the shaft to the desired

location and loosely mount bearings onto the bearing support. Bearing bolts and setscrews should be loose enough to allow shaft positioning.

d. Correctly position the wheel and tighten the bear-

ing bolts securely to the bearing support.

e. Align setscrews bearing to bearing and secure

Figure 3

tightly to the shaft.

Never tighten both pairs of setscrews before securing bearing mounting bolts. This may damage the shaft .

f. Inspect the wheel position again. If necessary, readjust by loosening

the bearing bolts and setscrews and repeat from step e.

Wheel Replacement

a. Drill two holes approximately centered between the shaft and the

edge of the hub OD with the following dimensions:

• 1/4" diameter

• 3/8" to 1/2" deep

• 180˚ apart in face of hub

b. Tap 1/4" holes to 5/16" thread with the 5/16" hole tap. Do not drill or

tap any larger than recommended.

• 1/4" diameter

• 3/8" to 1/2" deep

• 180˚ apart in face of hub

c. Tap 1/4" holes to 5/16" thread with the 5/16" hole tap. Do not drill or

tap any larger than recommended. d. Screw the puller arms into the tapped holes full depth of threads (3/

8" to 1/2" approximately). Align center of puller with center of shaft.

Make certain all setscrews in hub (normally a quantity of two) are fully

removed. Work puller slowly to back wheel off the shaft.

Recommended Puller

Lisle No. 45000 Sterling Wheel Puller. This puller is available at most auto-

motive parts retail outlets.

Above - Drilled hole placement. Right - Wheel puller.

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ACSC Parts List

Part

No.

1a Top Cap Lid Top Cap Lid Top Cap Lid

1b Top Cap Cylinder Top Cap Cylinder Top Cap Cylinder

2Top Cap Clip (4) Top Cap Clip (4) Top Cap Clip (8)

3 Motor Motor Motor

4 Spun Motor Plate Spun Motor Plate Spun Motor Plate

5 Bafﬂe Baffle Ba fﬂe

6 Wheel Assembly Wheel Assembly Wheel Assembly

7 Bird Screen Bird Screen Bird Screen

8 Base Base Base

9 Conduit (Not Shown) Conduit (Not Shown) Conduit (Not Shown)

10 Isolator (3) Isolator (4) Isolator (4)

11 Upper Post (4) Upper Post (4) Upper Post (8)

12 Lower Post (4) Lower Post (4) Lowe r Post (8)

13 Wind Band Wind Band Wind Band

14 — Brace (4) Brace (8)

15 Power Assembly Power Assembly Power Assembly

16 Shaft Shaft Shaft

17 Bearing (2) Bearing (2) Bearing (2)

18 Drive Sheave Drive Sheave Dri ve Sheave

19 Driven Sheave Driven Sheave D riven Sheave

20 Belt Set Belt Set Belt Set

21 Vent Tube (2) Vent Tube (2) Vent Tube (2)

22 Grommet (2) Grommet (2) Grommet (2)

23 Heat Shield Heat Shield Heat Shield

24 NEMA 3 Wiring Box NEMA 3 Wiring Box NEMA 3 Wiring Box

100 120-245 270-365

ACSC Parts Description

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.

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 Bearings

•Improper bearing lubrication

•Excessive belt tension.

LOREN COOK COMPANY

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

lorencook.com

ACSC IOM - November 2002