Loren cook H series User manual

1H-SERIES IO&M B51051-003

H-SERIES

Hooded Propeller Roof Fans

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

Receiving and Inspection

Carefully inspect the fan and accessories for any dam-

age and shortage immediately upon receipt of the fan. The

control panel, if ordered, is shipped inside of the roof base.

It is not counted as a separate part.

• Turn the propeller by hand to ensure it turns freely and does

not bind

• Check the 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.

NOTICE! Never lift by the shaft, motor or housing. If

your fan has a special protective nish, 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, vibra-

tion-free operation. If the propeller is damaged during han-

dling, it will require rebalancing.

H-Series

Rotating Parts & Electrical Shock Hazard:

Fans should be installed and serviced by qualied person-

nel only.

Disconnect electric power before working on unit (prior to

removal of guards or entry into access doors).

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 o󰀨, in case of an emer-

gency and in order that maintenance personnel are pro-

vided 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.

Fans and blowers create pressure at the discharge and

vacuum at the inlet. This may cause objects to get pulled

into the unit and objects to be propelled rapidly from the

discharge. The discharge should always be directed in a

safe direction and inlets should not be left unguarded. Any

object pulled into the inlet will become a projectile capable

of causing serious injury or death.

When air is allowed to move through a non-powered fan,

the impeller can rotate, which is referred to as windmill-

ing. Windmilling will cause hazardous conditions due to

unexpected rotation of components. Impellers should be

blocked in position or air passages blocked to prevent draft

when working on fans.

Friction and power loss inside rotating components will

cause them to be a potential burn hazard. All components

should be approached with caution and/or allowed to cool

before contacting them for maintenance.

Under certain lighting conditions, rotating components

may appear stationary. Components should be veried to

be stationary in a safe manner, before they come into con-

tact with personnel, tools or clothing.

Failure to follow these instructions could result in death or

serious injury.

The attachment of roof mounted fans to the roof curb as

well as the attachment of roof curbs to the building struc-

ture must exceed the structural requirements based on the

environmental loading derived from the applicable build-

ing code for the site. The local code o󰀩cial may require

variations from the recognized code based on local data.

The licensed engineer of record will be responsible for pre-

scribing the correct attachment based on construction ma-

terials, code requirements and environmental e󰀨ects spe-

cic to the installation.

This publication contains the installation, operation

and maintenance instructions for standard units of the

H-Series: Hooded Propeller Roof Fans.

• HEE/HES

• HEF

• HER

• HXE/HXS

• HXF

• HEE-D/HES-D

• HEF-D

• HER-D

Carefully read this publication and any

supplemental documents prior to any

installation or maintenance procedure.

Loren Cook catalogs, H-Series Belt Drive and H-Series

Direct Drive, provide additional information describing the

equipment, fan performance, available accessories and

specication data.

For additional safety information, refer to AMCA Publi-

cation 410-96, Safety Practices for Users and Installers of

Industrial and Commercial Fans.

All of the publications listed above can be obtained from:

• lorencook.com

• [email protected]

• 417-869-6474 ext. 166

For information and instructions on special equipment,

contact Loren Cook Company at 417-869-6474.

2H-SERIES IO&M B51051-003

Storage

If the fan is stored for any length of time prior to installa-

tion, store it in its original shipping crate and protect it from

dust, debris and the weather.

Outdoor Storage

To maintain good working condition of the fan when it is

stored outdoors or at a construction site, follow the instruc-

tions 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

Installation

Wiring Diagrams

Single Speed, Single Phase Motor

T-1

T-

Ground B

Ground A

Line

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

Ground B

T-1

T-

Low Speed

High Speed

Line

When ground is 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 B

J-10

T-5

Ground A

Link A

Link B

Low Voltage

Line

Ground A

Link A

and B

Line

Ground B

T-5

J-10

When ground is 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

Damper

Motor*

Second

Damper

Motor

ansformer** Transformer*

For 3-Phase, damper motor voltage should be the same

between L1and 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.

3 Phase, 9 Lead Motor

456

L1L2L3

456

789

12 3

L1L2L3

Low Voltage

208/230 Volts

High Voltage

460 Volts

3 Phase, 9 Lead Motor

Y-Connection

6789

456

12 3

Low Voltage

208/230 V

olts

High V

oltage

460 Volts

L1L3

3 Phase, 9 Lead Motor

Delta-Connection

To reverse, interchange any two line leads.

2 Speed, 1 Winding, 3 Phase Motor

Motor

Together

High Speed

Line

Open

Low Speed

Line

Motor

To reverse, interchange any two line leads. Motors require

magnetic control.

2 Speed, 2 Winding, 3 Phase

Low Speed

High Speed

Motor

T13

T12

T11

Line

To reverse, High Speed: interchange leads T11 and T12; Low

Speed: interchange leads T1and T2; Both Speeds: interchange

any two line leads.

3H-SERIES IO&M B51051-003

Damper Installation

If your fan is supplied with dampers, follow the directions

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

Motor Installation.

1. Place the damper inside the curb. Ensure the damper

will open freely for the correct direction of the airow.

2. Secure to curb at the damper shelf.

3. Drill a hole in the curb shelf for conduit needed for mo-

tor wiring.

4. 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

If your fan is a direct drive (model HEE-D, HES-D,

HEF-D or HER-D), proceed to Wiring Installation.

To prevent damage to the fan during shipping, motors

5HP and larger, and extremely heavy motors (cast iron or

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

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 the mo-

tor plate.

2. Remove the motor mounting bolts from the motor

plate.

3. Mount the motor to the motor plate aligning to the ap-

propriate holes.

4. Place the motor plate on the power assembly and re-

install 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 e󰀩ciency and

damage can occur.

Do not change the pulley pitch diameter to change ten-

sion. The change will result in a di󰀨erent 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 rm-

ly pressing the belt. Refer to Figure 1.

3. Lock the motor plate adjustment nuts in place.

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

Pulley Alignment

Pulley alignment is adjusted by loosening the motor pul-

ley setscrew and by moving the motor pulley on the motor

shaft.

1 foot

1/4 inch

Figure 1

OFFSET ANGULAR OFFSET/ANGULAR

CENTER

DISTANCE

(CD)

GAP

Tolerance

Center

Distance

Maximum

Gap

Up thru 12” 1/16”

12” up through 48 1/8”

Over 48 1/4”

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

gap must be adjusted by half of

the di󰀨erence in width. Figure

3illustrates 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.

Filter

Filter Installation

Detail

Figure 4

Wiring Installation

All wiring should be in accordance with local or-

dinances and the National Electrical Code, NFPA

70. Ensure the power supply (voltage, frequency,

and current carrying capacity of wires) is in accor-

dance with the motor nameplate. Refer to Wiring

Diagrams, pages 2 and 3.

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 connec-

tion with the terminal box at the end of the motor.

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).

Figure 2

4H-SERIES IO&M B51051-003

Fan Installation

The fan support (roof curb) should provide a level sur-

face for installation. If the roof is pitched more than 1/2:12,

a sloped curb must be used to correct the problem.

Place fan over roof opening. Secure the fan with lag

screws, anchor bolts, or other suitable fasteners.

Hood Assembly

Hoods for some non-ltered fans (size 42 and larger)

and some ltered fans (size 36 or larger) require eld as-

sembly. Assembly is accomplished using 1/2” and 9/16”

socket wrenches. Line-up punches and hand clamps will

speed up the assembly. Figure 4 shows the components

used to assembly the hood.

1. Place the hood halves (A) onto the hood supports (D).

Line up the hood anges and bolt the anges of the

hood ends (G) together. The top caps (B) must be in-

ter-locked for the anges to meet correctly.

2. Go under the hood and bolt the hood (angle ange) to

the hood supports (D) at the four overlapping locations.

3. Install the two perimeter angles (C), that were shipped

loose, inside each end of the hood.

4. If there is a gap between the top cap edges, loosen

the top cap bolts. Install a bolt in each end of the top

cap ange to pull the two top caps together. Tighten

the top cap bolts.

Filtered Fans

1. Place the two long lter retainers (E) (four on size 60)

and the two short lter retainers (F) on top of the base

and bolt the pieces together.

2. Bolt the long lter retainers (E) to the perimeter angles

3. Install lters according to the lter schedule. Refer to

Filter Installation detail below. Insert edge of lters into

the lter retainer (E), swing lter into position and ip

the lter holding clip into position.

H-Series Fan Filter Sizes

Unit Size Type 1 Type 2

Length x Width No. Req. Length x Width No. Req.

20 14” x 14” 414” x 18-7/8” 6

24 18-1/4” x 30-1/8” 218-1/4” x 33-1/4” 4

30 20-7/16 x 18-1/16” 420-7/16” x 25-13/16” 6

36 22-1/4” x 21-1/16” 422-1/4” x 29-5/32” 6

42 24-1/16” x 29-1/2” 426-7/8” x 19-1/4” 8

48 27” x 27” 427” x 27” 8

54 29-1/8” x 20” 629-1/8” x 23-5/8” 10

60 37-11/16” x 21-7/8” 626” x 28-5/16” 10

Final Installation Steps

1. Inspect fasteners and setscrews, particularly fan mount-

ing and bearing fasteners, and tighten according to the

recommended torque shown in the table, Recommend-

ed Torque for Setscrews/Bolts.

2. Inspect for correct volt-

age 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.

Do not allow the fan to run in the wrong direction.

This will overheat the motor and cause serious

dam-age. 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 lo-

cation 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. Inspect fasteners and setscrews, particularly those

used for mounting the fan, 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 propeller to ensure it does not rub against

the venturi.

7. Ensure fan and duct work are clean and free of debris.

Test the fan to ensure the rotation of the propeller is

the same as indicated by the rotation label (The HER

has a reversible propeller and can be operated in ei-

ther direction).

8. Close and secure all access doors.

9. Restore power to unit.

Recommended Torque for Setscrews/Bolts (IN-LB)

Setscrews Hold Down Bolts

Size

Key Hex

Across

Flats

Recommended

Torque Size Recommended

Torque

Min. Max.

#8 5/64” 15 21 3/8”-16 324

#10 3/32” 27 33 1/2”-13 780

1/4 1/8“ 70 80 5/8”-11 1440

5/16 5/32” 140 160 3/4”-10 2400

3/8 3/16” 250 290 7/8”-9 1920

7/16 7/32” 355 405 1”-8 2700

1/2 1/4“ 560 640 1-1/8”-7 4200

5/8 5/16” 1120 1280 1-1/4”-7 6000

3/4 3/8” 1680 1920 - -

7/8 1/2” 4200 4800 - -

19/16” 5600 6400 - -

Start Up

Turn the fan on. In variable speed fans, 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 o the fan. Lock out all electrical power and

check for the cause of the trouble. Refer to Trou-

bleshooting, page 7.

Inspection

Inspection of the fan should be conducted at the rst 30

minute, 8 hour and 24 hour intervals of satisfactory op-

eration. During the inspections, stop the fan and inspect as

per the following:

Filter

Schedule

Type 2

Type 1

5H-SERIES IO&M B51051-003

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.

Filters

Filter inspection and cleaning intervals can vary from once

a week to twice per year depending on contaminant present

and acceptable pressure drops across the lter. Under most

conditions lters may be cleaned with hot water and a mild

soap solution (such as dish washing liquid) or steam. Some

caustic cleaners will damage the lter. If in doubt, please

consult the factory for a compatibility list.

High pressure spray washers should be limited to 2,000

psi operating pressure. Every attempt should be made to re-

move the contaminants from the lter in a “back-wash” ow

(note airow arrow on the lter frame). Once the lter is dry,

it may be returned to the appropriate lter racks in the same

orientation (airow direction) as they were removed.

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 con-

taminated air (airborne abrasives) should be inspected ev-

ery three months. Clean the propeller and air inlets if ma-

terial build-up is excessive. Excessive build-up can cause

imbalance and failure of the propeller.

Regular inspections are recommended for fans exhaust-

ing non-contaminated air.

It is recommended the following inspections be con-

ducted 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

• 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

Fan Bearings

The fan bearings are provided prelubricated. Any special-

ized lubrication instructions on fan labels supersedes in-

formation provided herein. Bearing grease is a petroleum

lubricant in a lithium base conforming to an NLGI #2 consis-

tency. If user desires to utilize another type of lubricant, they

take responsibility for ushing bearings and lines, and main-

taining a lubricant that is compatible with the installation.

An 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

the seal and reduce the 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 -30 to 120 6 months

120 to 200 2 months

1000–3000 -30 to 120 3 months

120 to 200 1 month

Over 3000 -30 to 120 1 month

120 to 200 2 weeks

Any Speed < -30 Consult Factory

Any Speed > 200 1 week

For moist or otherwise contaminated installations, divide the

interval by a factor of three. For vertical shaft installations, divide

the interval by a factor of two.

Motor Bearings

Motors are provided with prelubricated bearings. Any lu-

brication instructions shown on the motor nameplate su-

persede instructions below.

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 main-

tenance department disassemble and lubricate the bear-

ings after 3 years of operation to pre-vent interruption of

service.

For motors with provisions for relubrication, follow inter-

vals of the table below.

Relubrication Intervals

Service

Conditions

NEMA Frame Size

Up to and

including 184T 213T–365T 404T and larger

1800 RPM

and less

Over

1800

RPM

1800

RPM

and less

Over

1800

RPM

1800

RPM

and less

Over 1800

RPM

Standard 1-1/2 yrs. 3

months 1 yr. 3 months 6 months 1-1/2

months

Severe 6 months 1-1/2

months

1-1/2

months 3 months 2 weeks

Motors are provided with a polyurea mineral oil NGLI #2

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

a compatible grease such as Exxon Mobil Polyrex EM and

Chevron SRI.

Motor Services

Should the motor prove defective within a one-year pe-

riod, contact your local Loren Cook representative or your

nearest authorized electric motor service representative.

Changing Shaft Speed

All belt driven H-Series fans with motors up to and in-

cluding 5HP are equipped with variable pitch pulleys. To

change the fan speed, perform the following:

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

key, if equipped.

2. 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.

3. After adjustment, inspect for proper belt tension.

6H-SERIES IO&M B51051-003

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 lim-

its of the fan and the horsepower limits of the motor are

maintained.

Pulley and Belt Replacement

1. Clean the motor and fan shafts.

2. Loosen the motor plate mounting bolts to relieve the

belt tension. Remove the belt.

3. 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 eas-

ily 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” out of true.

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

oil on the bores.

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

6. 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.

Maximum RPM

HXEL, HXSL,

HXFL Size

Max.

RPM

20 1276

24 1126

30 932

36 720

42 610

48 516

54 478

60 450

HEE Size Max. RPM

24 1675

30 1295

36 1125

42 880

48 822

54 776

60 636

HES Size Max. RPM

24 1630

30 1330

36 1165

42 885

48 830

54 742

60 642

HEF Size Max. RPM

24 1635

30 1330

36 116 0

42 880

48 816

54 735

60 634

HER Size Max. RPM

24 1635

30 1325

36 1145

42 920

48 818

54 748

60 642

HEXM, HXSM,

HXFM Size

Max.

RPM

20 1462

24 1400

30 118 4

36 864

42 718

48 598

54 522

60 539

7. After the pulleys have been correctly placed back onto

their shafts, tighten the pulley setscrews.

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

belts to the proper tension as described in Belt and

Pulley Installation, page 3.

Bearing Replacement

The fan bearings are pillow block ball bearings.

1. Remove the top cap or hood as necessary to gain ac-

cess to the fan.

2. Loosen the motor plate mounting bolts and remove the

drive belts.

3. Remove the propeller from the shaft.

4. Remove the four (4) bearing hold-down bolts and then

remove the shaft, bearings, and driven sheave from

the unit as an assembly.

5. Measure and record the location of the bearings and

sheave on the shaft. This will aid the reassembly.

6. Remove the anti-corrosion coating from the shaft with

a suitable degreaser and then remove the pulley from

the shaft.

7. Remove the bearing from the shaft using a bearing

puller.

8. Install the pulley in the correct location on the shaft

Secure the bearing hold-down bolts, but do not fully

tighten.

9. Align the setscrews on the bearings and tighten one

setscrew on each bearing.

10. Rotate the shaft to allow the bearing outer rings to nd

their center of free movement.

11. Install the propeller on the shaft and adjust the bearing

position to center the propeller in the opening.

12. Tighten the hold-down bolts to the proper torque. Re-

fer to Torque Chart, page 4.

13. Turn the shaft by hand. Resistance should be the

same as it was before the hold-down bolts were fully

tightened.

14. Tighten the bearing setscrews to the specied torque.

15. Install the pulley and adjust the belt tension.

16. Reassemble the fan.

After 24 hours of continuous operation, tighten the set-

screws to the appropriate torque. This assures the full

locking of the inner race to the shaft. Ensure 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 the rounding out of the setscrew socket

when applying maximum torque.

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 nished 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

su󰀩cient padding on the shaft and propeller. This pre-

vents 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

7H-SERIES IO&M B51051-003

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

HEE/HES/HER Parts List

HEF, HES, HEE, HER, HXEL,HXEM, HXSL, HXSM

Part

No. 20–30 36–48 54–72

1 - - Hood Support Angle (2)

2Motor Motor Motor

3Motor Sheave Motor Sheave Motor Sheave

4Motor Plate Motor Plate Motor Plate

5Belts Belts Belts

6 - - Center Post (2) (Size 72

or HEF size 60 only)

7Fan Sheave Fan Sheave Fan Sheave

8Shaft Shaft Shaft

9Topcap Topcap Topcap

10 Corner Post (4) Corner Post (4) Corner Post (4)

11 Hood End Hood End Hood End

12 Hood Side Hood Side Hood Side

13 Perimeter Angle (4) Perimeter Angle (4) Perimeter Angle (4)

14 Bearings Bearings Bearings

15 HXEM/HXSM/HXEL/HXSL - X-Stream Propeller:

HEE/HES/HER - Extruded Propeller

16 Base Assembly: Power Assembly

17 Supply Venturi Supply Venturi Supply Venturi

HEE-D/HES-D/HER-D Parts List

HEE-D/HES-D/HER-D

Part

No. 20–30 36–48 54–72

1 - - Hood Support

Angle (2)

2Motor Motor Motor

3Motor Plate Motor Plate Motor Plate

4Topcap Topcap Topcap

5 Corner Post (4) Corner Post (4) Corner Post (4)

6 Hood End Hood End Hood End

7Hood Side Hood Side Hood Side

8Perimeter Angle

(4)

Perimeter Angle

(4)

Perimeter Angle

(4)

9Extruded Propeller Extruded Propeller Extruded Propeller

10 Base Assembly/

Power Assembly

Base Assembly/

Power Assembly

Base Assembly/

Power Assembly

11 Supply Venturi Supply Venturi Supply Venturi

8H-SERIES IO&M B51051-003

HEF Parts List

HXFL/HXFM Parts List

21 20 19

17 16

15 14

HEF-D Parts List

16 14

HEF, HXFL & HXFM

Part

No. 24–30 36–42 48 54–60 72

1 - Hood Support

Angle Hood Support Angle

2Motor Motor Motor

3Motor Sheave Motor Sheave Motor Sheave

4Motor Plate Motor Plate Motor Plate

5Belt Belt Belt

6 - - - Center Post

7Fan Sheave Fan Sheave Fan Sheave

8Shaft Shaft Shaft

9Topcap Topcap Topcap

10 - Corner Post Corner Post

11 Hood End Hood End Hood End

12 Hood Side Hood Side Hood Side

13 Perimeter Angle

(4) Perimeter Angle (4) Perimeter Angle (4)

14 Filter Rack (2) Filter Rack (2) Filter Rack (2)

15 Power Assembly Power Assembly Power Assembly

16 Bearings Bearings Bearings

17 HEF - Extruded Propeller:

HXFL/HXFM - X-Stream Propeller

18 Base Assembly Base Assembly Base Assembly

19 Supply Venturi Supply Venturi Supply Venturi

20 Filter

Crossmember Filter Crossmember Filter Crossmember

21 Filter* Filter* Filter*

* See Filter Schedule on page 4

HEF-D

Part

No. 24–30 36–42 48 54–60 72

1 - Hood Support

Angle Hood Support Angle

2Motor Motor Motor

3Motor Plate Motor Plate Motor Plate

4 - - - Center Post

5Topcap Topcap Topcap

6 - Corner Post Corner Post

7 Hood End Hood End Hood End

8Hood Side Hood Side Hood Side

9Perimeter Angle

(4) Perimeter Angle (4) Perimeter Angle (4)

10 Filter Rack (2) Filter Rack (2) Filter Rack (2)

11 Power Assembly Power Assembly Power Assembly

12 Extruded

Propeller Extruded Propeller Extruded Propeller

13 Base Assembly Base Assembly Base Assembly

14 Supply Venturi Supply Venturi Supply Venturi

15 Filter

Crossmember Filter Crossmember Filter Crossmember

16 Filter* Filter* Filter*

17 * See Filter Schedule on page 4

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 modied 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 O󰀩ces, 2015 East Dale Street, Springeld, Missouri 65803-4637, explaining in writing, in detail, your complaint and referring to

the specic model and serial numbers of your fan. Upon receipt by Loren Cook Company of your written complaint, you will be notied, 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 ad-

justment 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 specically the right. You may have other legal rights which vary from state to state. For fans provided with