COOK Propeller Wall Fans User Manual

1

Propeller Wall Fans

®

Installalation, Operation, And Maintenance Manual

This installation manual provides information for
installing and conguring the Loren Cook Company
Propeller Wall Fans.

• XWD

• XWHD

• XPD

• XPHD

• XLW / XMW

• XLWH / XMWH

• XLP / XLPH

• XMP / XMPH

• AWD

• AWB

• APD

• APB

• EWD

• EWB

• EPD

• EPB

• SWD

• SPB

• SPD

Exhaust & supply models

Carefully read this publication and any
supplemental documents prior to any
installation or maintenance procedure.

Loren Cook Company’s Propeller Wall catalog provides

additional information describing the equipment, fan

performance, available accessories and specication data.

For information and instructions on special equipment,

contact Loren Cook Company.

For additional safety information, refer to AMCA

publication 410-96, Safety Practices for Users and

Installers of Industrial and Commercial Fans. This

document and all Cook publications may be obtained from
Cook by phoning [phone], extension 166; by FAX

at [phone]; or by e-mail at [e-mail].
All Cook publications are available on LorenCook.com.

Receiving and Inspection

Carefully inspect the unit and accessories for any

damage and shortage immediately upon receipt of the unit.

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

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

XLWH shown

Rotating Parts & Electrical Shock Hazard

Disconnect electric power before working on unit.

Follow proper lockout / tagout procedures to ensure
the unit cannot be energized while being installed or

serviced.

A disconnect switch should be placed near the fan
in order that the power can be swiftly cut off, in case
of an emergency and in order that maintenance
personnel are provided complete control of the

power source.

Grounding is required. All eld-installed wiring
must be completed by qualied personnel. All eld
installed wiring must comply with National Electric
Code (NFPA 70) and all applicable local codes.

Failure to follow these instructions could result in

death or serious injury.

Handling

Lift propeller wall fans by attachment to the power

assembly or by the shipping carton. Never lift by the shaft,
motor or housing.

Storage

If the fan is stored for any length of time prior

to installation, coat the shaft with grease or a rust

preventative compound. Store it in its original shipping
crate and protect it from dust, debris and the weather.

Rotate the wheel several revolutions every three to ve

days to keep a coating of grease on all internal bearing

parts.

Installation

Fans mounted to a wall require a different wall opening

size than fans mounted in wall collars or wall housings. For
specic dimensions, refer to the submittal drawing for the
specic fan type.

Motor Installation

To prevent damage to the fan during shipping, motors 5

HP and larger, and extremely heavy motors (cast iron or

severe duty) are shipped loose and must be eld mounted

by bolting the motor on the motor mounting plate in the

existing slots.

The motor should be mounted in order that the motor

plate is between the fan shaft and the motor shaft.

1. Remove the motor plate mounting bolts and motor
plate.

2

2. Remove the motor mounting bolts from the motor
plate.

3. Mount the motor to the motor plate aligning the
appropriate holes.

4. Place the motor plate on the power assembly and
reinstall the mounting bolts.

Belt and Pulley
Installation

Belt tension is determined

by the sound of the belts

when the fan is rst started.
The belts will produce a loud

squeal, which dissipates
after the fan is operating at

full capacity. If belt tension

is too tight or too loose, lost

efciency and damage can
occur.

Do not change the pulley

pitch diameter to change tension. The change will result
in a different fan speed.

1. Loosen the motor plate

adjustment nuts on motor
base and move motor plate
in order that the belts can
easily slip into the grooves

on the pulleys. Never pry,

roll, or force the belts over

the rim of the pulley.

2. Adjust the motor plate until
proper tension is reached.

For proper tension, a

deection of approximately

1/4” per foot of center
distance should be

obtained by rmly pressing
the belt. See drawing to the
right.

3. Lock the motor plate adjustment nuts in place.

4. Ensure pulleys are properly
aligned. See next section.

Pulley Alignment

Pulley alignment is adjusted

by loosening the motor pulley

OFFSET ANGULAR OFFSET/ANGULAR

A

W

B

CENTER

DISTANCE

(CD)

X

Y

Z

1/4 inch

Figure 3

Tolerance

Center Distance

Up thru 12” 1/16”

12” up through 48 1/8”

Over 48” 1/4”

GAP

1 foot

Maximum

Gap

GAP

setscrew and by moving the motor pulley on the motor

shaft.

The drawing below 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 gap must

be adjusted by half of the difference in width. 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.

Installation

Insert the fan into the wall opening and secure with lag

screws, anchor bolts, or other suitable fasteners.

Always mount belt drive wall fans in order that the

motor base is below the fan shaft.

Wiring

Proper Electrical Safety Habits

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).

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. Follow the wiring diagram in the
disconnect switch and the wiring diagram
provided with the motor.

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.

Wall Fans

1. Extend wires to the fan.

2. Prevent excess wire from entering the shaft and

propeller area by restraining the excess wire to a

point outside the base.

Wall Fans with Wire Guard

1. Remove end panel from the wire guard to gain
access to the motor.

2. Extend wires through a side panel of the wire guard
to gain access to the motor.

3. Prevent excess wire from entering the shaft and

propeller area by restraining the excess wire to a

point outside the base.

Wall Fans with Wall Housing

1. Remove end guard from the wall housing.

2. Drill a hole through either side panel at a
convenient location and pull the wires through. Do
not pull wires through wire guard at the back panel.

3. Restrain the incoming wire at the side panel to

prevent excess wire from entering the shaft and

propeller area.

3

Single Speed, Single Phase Motor

3 Phase, 9 Lead Motor Y-Connection

Ground A

L

T-1

T-4

Ground B

Line

L

1

2

When ground is required, attach to ground A or B with

no. 6 thread forming screw. To reverse, interchange
T-1 and T-4.

2 Speed, 2 Winding, Single Phase Motor

Ground A

T-1

T-4

Ground B

High Speed

L

1

L

2

Low Speed

Line

When ground required, attach to ground A or B with

No. 6 thread forming screw. To reverse, interchange
T-1 and T-4 leads.

Single Speed, Single Phase, Dual Voltage

Ground A

Link A & B

T-5

J-10

Ground B

Ground A

Link A

Link B

Low Voltage

L

Line

L

1

T-5

J-10

2

Ground B

L

Line

L

3 Phase, 9 Lead Motor
Y-Connection

Low Voltage

208/230 Volts

4

5

6

3

1

9

728

L2L

L

1

3

High Voltage

460 Volts

456

789

3

12

L2L

L

3

1

To reverse, interchange any 2 line leads.

3 Phase, 9 Lead Motor Delta-Connection

3 Phase, 9 Lead Motor
Delta-Connection

Low Voltage

208/230 Volts

8

7

4

6

2

1

L

L

1

2

L

3

9
5

3

High Voltage

460 Volts

789

456

3

12

L1L

L

3

2

To reverse, interchange any 2 line leads.

2 Speed, 1 Winding, 3 Phase Motor

High Speed

1

Motor

2

1

Together

2
3

L

4

1

L

5

2

6

Line

L

3

Low Speed

Motor

L

1

1

L

2

2

L

3

Open

Line

3

4
5

6

When ground required, attach to ground A or B with

No. 6 thread forming screw. To reverse, interchange
T-5 and J-10 leads.

Typical Damper Motor Schematic

Fan

Motor

Transformer**

Damper

Motor*

Second
Damper

Motor

L3
L2
L1

Transformer**

For 3 phase, damper motor voltage should be

the same between L1 and L2. For single phase
application, disregard L3. *Damper motors may be
available in 115, 230 and 460 volt models. The damper
motor nameplate voltage should be veried prior to
connection. **A transformer may be provided in some

installations to correct the damper motor voltage to the

specied voltage.

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

2 Speed, 2 Winding, 3 Phase

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

Low Speed-interchange leads T1 and T2. Both
Speeds-interchange any 2 line leads.

4

Shutters

If your fan is supplied with a shutter, follow the direction

below. If your fan is not supplied with a shutter, proceed
to Final Installation Steps.

To ensure long-life, make a weather-proof seal by using

a good quality silicon caulking under the shutter ange.

1. Place the shutter into the wall opening.

2. Mount the shutter to the supporting surface using
Number 12 sheet metal screws on six inch centers
around the perimeter.

3. Manually operate the shutter to ensure the blades
move freely.

Typical Installation

Refer to page 8.

Final Installation Steps

1. Inspect fasteners and setscrews, particularly
fan mounting and bearing fasteners, and tighten
according to the recommended torque shown in

the table on page 4, Recommended Torque for
Setscrews/Bolts.

2. Inspect for correct voltage with voltmeter.

3. Ensure all accessories are installed.

4. Test the fan to be sure the rotation is the same as
indicated by the arrow marked Rotation.

Proper 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

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

2. nspect fasteners and setscrews, particularly

those used for mounting the unit, and tighten if

necessary.

3. Inspect belt tension and pulley alignment.

(Remember, if belt tension is correct, a loud squeal

occurs as the fan increases to full power.)

4. Inspect motor wiring.

5. Ensure the belt touches only the pulleys.

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

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

8. Test the fan to ensure the rotation of the propeller
is the same as indicated by the rotation label.

9. Close and secure all access doors.

10. Restore power to unit.

Start Up

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

its lowest speed. Inspect for the following:

• Direction of rotation.

• Excessive vibration.

• Unusual noise.

• Bearing noise.

• Improper belt alignment or tension (listen for a
continuous squealing noise).

• Improper motor amperage or voltage.

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

Recommended Torque for Setscrews/Bolts

In. - Lb.

Setscrews Hold Down Bolts

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

Recommended

Torque

Wrench

Torque

Inspection

Inspection of the fan should be conducted at the rst

30 minute, 8 hour and 24 hour intervals of satisfactory

operation. During the inspections, stop the fan and
inspect as per directions 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.

Maintenance

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

Inspect fans exhausting corrosive or contaminated

air within the rst month of operation. Fans exhausting

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.

5

• Inspect belt wear and alignment. Replace worn belts
with new belts and adjust alignment as needed. See Belt
and Pulley Installation, on page 2.

• Bearings should be inspected as recommended in the
Conditions Chart, below.

• 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 ushed 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

Motors are provided with prelubricated bearings. Any

lubrication instructions shown on the motor nameplate

supersede instructions below.

Direct Drive 1050/1075,1200,1300 &1500 rpm units use

a prelubricated sleeve bearing that has a oil saturated

wicking material surrounding it. The initial factory

lubrication is adequate for up to 10 years of operation

under normal conditions. However, it is advisable to add
lubricant after 3 years. Use only LIGHT grade mineral oil
or SAE 10W oil up to 30 drops. If the unit has been stored

for a year or more it is advisable to lubricate as directed

above. For units in severe conditions, lubrication intervals
should be reduced to half.

Motors without sleeve bearings (as described above)

will have grease lubricated ball or roller bearings. Motor

bearings without provisions for relubrication will operate up

to 10 years under normal conditions with no maintenance.

In severe applications, high temperatures or excessive
contaminates, it is advisable to have the maintenance
department disassemble and lubricate the bearings after 3

years of operation to prevent interruption of service.

For motors with provisions for relubrication, follow

intervals of the table below.

Relubrication Intervals

NEMA Frame Size

Up to and

including 184T

Service

Conditions

3 yrs.

Standard

Severe

1800
RPM

and

less

1 yr.

Over
1800
RPM

6

months

3

months

Motors are provided with a polyurea mineral oil NGLI #2

grease. All additions to the motor bearings are to be with a

compatable grease such as Exxon Mobil Polyrex EM and

Chevron SRI.

213T-365T 404T and larger

1800
RPM

and

less

2 yrs.

1 yr.

Over
1800
RPM

6

months

3

months6 months1 months

1800
RPM

and

less

1 yr.

Over
1800
RPM

3

months

The above intervals should be reduced to half for vertical

shaft installations.

Fan Bearings

The fan bearings are provided prelubricated. Any

specialized lubrication instructions on fan labels

supersedes information provided herein. Bearing grease

is a petroleum lubricant in a lithium base conforming to a

NLGI #2 consistency. If user desires to utilize another type
of lubricant, they take responsibility for ushing bearings

and lines, and maintaining a lubricant that is compatible

with the installation.

A NLGI #2 grease is a light viscosity, low-torque, rust-

inhibiting lubricant that is water resistant. Its temperature

range is from -30°F to 200°F and capable of intermittent

highs of 250°F.

Bearings should be relubricated in accordance with the

condition chart below.

For best results, lubricate the bearing while the fan is in

operation. Pump grease in slowly until a slight bead forms
around the bearing seals. Excessive grease can damage

seal and reduce life through excess contamination and/or

loss of lubricant.

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

more than three injections with a hand operated grease

gun.

Conditions Chart

RPM Temp °F Greasing Interval

Up to 1000

1000 to

3000

Over 3000

Any Speed < -30 Consult Factory

Any Speed > 200 1 week

-30 to 120 6 months

120 to 200 2 months

-30 to 120 3 months

120 to 200 1 month

-30 to 120 1 month

120 to 200 2 weeks

For moist or otherwise contaminated installations;

divide the interval by a factor of 3. For vertical shaft
installations divide the interval by a factor of 2.

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 Propeller Wall 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).