COOK ETS User Manual

REBEL/AQ/SEP/ETE/ETS

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.

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.

Propeller Roof Fans

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

This publication contains the installation, operation

and maintenance procedures for standard units of the

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

Carefully read this publication prior to any installa-

tion or maintenance procedure.

Loren Cook catalog, Propeller Roof Fans, provides addi­tional information describing the equipment, fan perfor­mance, available accessories and specification data.

For additional safety information, re fer 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 [phone], exten­sion 166; by FAX at [phone]; or by e-mail at
[e-mail].

For information and instructions on special equipment,
contact Loren Cook Company at [phone].

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 Delivery Receipt any visible sign of
damage.

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., phe­nolic 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.

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 damp-

ers (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 weath er cover to pre-

vent moisture, corrosion, dirt or dust accumulation.

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 ea ch 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.

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

motor wiring.

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

REBEL/AQD/SEP

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.

Recommended Torque for Setscrews/Bolt s (IN/LB.)

Setscrews

Hold Down Bolts

Size

Key Hex

Across

Flats

Recommended

Torque

Min. Max. Size

Wrench

Torque

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

Damper Installation continued

1 foot

1/4 inch

Figure 1

Figure 2

Tolerance

Center Distance

Maximum

Gap

Up thru 12” 1/16”

12” up through 48 1/8”

Over 48” 1/4”

OFFSET ANGULAR OFFSET/ANGULAR

A

W

X

Y

Z

B

CENTER

DISTANCE

(CD)

GAP

GAP

d. Operate the dampers manually to ensure the blades

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

Motor Installation (Belt Drive fans)

To prevent damage to the fan during shipping, mo to rs 5
HP and larger, and extremely heavy motors (cast iron or
severe duty) are shipped loose and must be fie ld 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.

Pulley Alignment

Pulley alignment is adjusted by loosen­ing the motor pulley setscrew and by mov­ing the motor pulley on the motor shaft.

Figure 2 indicates where to measure the
allowable gap for the drive alignment toler­ance. All contact points (indicated by
WXYZ) are to have a gap less than the tol­erance shown in the table. When the pul­leys are not the same width, the allowable

Figure 3

gap must be adjusted by half of the difference in width (As
shown in A & B of Figure 2). Figure 3 illustrates using a car­penter’s square to adjust the position of the motor pulley until
the belt is parallel to the longer leg of the square.

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.

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 fa n is operatin g 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 obtaine d by firmly
pressing the belt. Refer to Figure 1.

c. Lock the motor plate adjustment nuts in place.

d. Ensure pulleys are properly aligned. Refer to Figure 2.

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.

2

Wiring Diagrams

T-1

T-4

Ground B

L

2

L

1

Ground A

Line

Ground A

Ground B

T-1

T-4

Low Speed

High Speed

L

1

L

2

Line

Ground B

J-10

T-5

Ground A

Link A

Link B

Low Voltage

Line

L

2

L

1

Ground A

Link A & B

L

1

L

2

Line

Ground B

T-5

J-10

Motor

1
2
3

4
5

6

Together

High Speed

Line

L

1

L

2

L

3

1
2
3

4
5

6

Open

Low Speed

Line

L

1

L

2

L

3

Motor

ROTATION

CW

SHAFT END

PURPLE
PURPLE
YELLOW
YELLOW

ROTATION

CCW

SHAFT END

PURPLE
YELLOW
YELLOW

PURPLE

CONNECTION DIAGRAM
BROWN

BRN/WHT

WHITE

BLACK-HI

RED-LOW

LINE
LINE

4

5

6

1

728

3
9

L

1

L2L

3

456

789

12

3

L

1

L2L

3

Low Voltage

208/230 Volts

High Voltage

460 Volts

3 Phase, 9 Lead Motor
Y-Connection

Single Speed, Single Phase Motor

Wiring Diagrams

3 Phase, 9 Lead Motor
Delta-Connection

Low Voltage

208/230 Volts

L

1

When ground is required, attach to ground A or B with no. 6 thread forming

To reverse, interchange any 2 line leads.

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

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

High Voltage

460 Volts

9

8

7
6

1

5

4

3

2

L

L

3

2

789

456

12

L1L

L

3

3

2

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

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

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

High Speed

1

Together

2
3

L

4

1

L

5

2

6

Line

L

3

and T2. Both Speeds-interchange any 2

1

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

Motor

To reverse: High Speed-interchange leads T11 and T12.
Low Speed-interchange leads T
line leads.

Typical Damper Motor Schematic

REBEL Motor Wiring Diagram
125 V Single Phase

EXHAUST

Hub side away from motor.

Fan

Motor

Transformer**

Damper

Motor*

Second
Damper

Motor

L3
L2
L1

Transformer**

For 3 phase, damper motor
voltage should be the same
between L
gle phase application, disre­gard L
may be available in 115, 230

and L2. For sin-

1

. *Damper motors

3

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.

Low Speed

Motor

L

1

1

L

2

2

3

L

3

4

Open

5
6

SUPPLY

Hub side towards motor.

Line

Final Installation Steps

a. Inspect fasteners and setscrews, particular ly 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.

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. (The SEP

3

has a reversible propeller and can be operated in either

direction)

i. Restore power to unit.

Start Up

WARNING
Disconnect power before checking and cleaning
filters. Inadvertent operation of the fan cou ld pull
objects from the roof into the propeller.

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

Up to 150°F Dirty 1 week to 1 month

Any

Speed

Over 150°F Dirty Daily to 2 weeks

Any

Speed

Any Temperature Very Dirty Daily to 2 weeks

Any

Speed

Any Temperature

Extreme

Conditions

Daily to 2 weeks

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 th e fa n a nd ins pe ct a s pe r
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.

Belt and Pulley Installation, page 2.

• Bearings should be inspected as recomme nde d in th e
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 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 oper­ation in excessive heat and or in a contaminated airstream
consisting of airborne abrasives.

Filter

If you fan is not supplied with filters proceed to Mainte-

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.

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 conta m­inated 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

Fan Bearings

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

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 se rvic e re pr esenta­tive.

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.

4

Changing Shaft Speed Continued
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

AQB

Maximum

Size

RPM

24 1025 24 1150 24 1160
30 850 30 850 30 930
36 725 36 725 36 780
42 625 42 610 42 665
48 575 48 565 48 660

SEP
Size

Maximum

RPM

ETE/

Maximum

ETS

54 640
60 615

RPM

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 Belt and Pul-
ley Installation, page 2.

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 prope ller 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 propelle r. 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.

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 bolt s 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.

5

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.

6

1

2

3

4

7

8

10

11

12

13

6

11

22

33

44

55

66

77

88

99

1010

1111

1212

1313

11

22

33

44

55

66

77

88

99

1010

1111

1212

1313

1414

1515

16161717

1818

1919

AQB/SEP/AQD Parts List

1

2

3

4

5

6

7
8

9

10

11

12

13

14

15

16

17

18

19

AQB

SEP

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 Lower Posts(4) Lower Post (4)
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 Upper Post (4) Upper Post (8) Upper Post (8)
6 Shaft Shaft
7 Birdscreen Birdscreen
8 Power Assembly Power Assembly
9 3/8” Nut (4) 3/8” Nut (8)

Description

AQD Size 12

AQD 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

7

1

2

3

44

5

6

7

8

9

10

11

1

2

3

4

5

6

7

8

9

10

11

12

11

22

33

44

55

66

77

88

99

1010

1111

1212

1313

ETE/ETS/REBEL Parts List

ETE

Description

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

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

ETE Sizes 24-60 ETS Sizes 24-60

ETS

Part No. Description

1 Top Cap
2Motor
3 5/16” Bolt (4)
4 Support Post (4)
5 Birdscreen (Optional)
6 5/16” Bolt (4)
7 Venturi
8 Stamped Steel Propeller

9Base
10 Wireguard
11 Conduit

REBEL

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 ther eo f has b e en 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 tha n for the uses describ ed 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 (3 0) days of our receipt of your complaint, in writing, as to the manner in which your claim will be h andled. If you are
entitled to warranty relief, a warranty adjustment will be completed within sixty (60) business days of the receipt of your written co mplaint 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

lorencook.com

8

REBEL/AQ/SEP/ETE/ETS IOM - February 2008