Greenheck Fan Centrifugal Roof Exhaust Fans Lbp Users Manual

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1Series L: Models LB, LBP, LD, and LDP

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting

to assemble, install, operate or maintain the product described. Protect yourself and others by

observing all safety information. Failure to comply with instructions could result in personal injury

and/or property damage!

®

PN 453283

Series L: Models LB, LBP, LD, and LDP

Low Silhouette Centrifugal Roof Exhaust Fans

Only qualified personnel should install this fan.

Personnel should have a clear understanding of

these instructions and should be aware of general

safety precautions. Improper installation can result

in electric shock, possible injury due to coming in

contact with moving parts, as well as other potential

hazards. Other considerations may be required

if high winds or seismic activity are present. If

more information is needed, contact a licensed

professional engineer before moving forward.

1. Follow all local electrical and safety codes, as

well as the National Electrical Code (NEC) and

the National Fire Protection Agency (NFPA),

where applicable. Follow the Canadian Electric

Code (CEC) in Canada.

2. The rotation of the wheel is critical. It must be

free to rotate without striking or rubbing any

stationary objects.

3. Motor must be securely and adequately

grounded.

4. Do not spin fan wheel faster than max cataloged

fan RPM. Adjustments to fan speed significantly

effects motor load. If the fan RPM is changed,

the motor current should be checked to make

sure it is not exceeding the motor nameplate

amps.

5. Do not allow the power cable to kink or come

in contact with oil, grease, hot surfaces,

or chemicals. Replace cord immediately if

damaged.

6. Verify that the power source is compatible with

the equipment.

7. Never open access doors to a duct while the fan

is running.

DANGER

Always disconnect, lock and tag power source before

installing or servicing. Failure to disconnect power source

can result in fire, shock or serious injury.

CAUTION

When servicing the fan, motor may be hot enough to

cause pain or injury. Allow motor to cool before servicing.

CAUTION

Precaution should be taken in explosive atmospheres.

Series L Exhaust Fans

Greenheck’s Series L, low silhouette, models LD, LB,

LDP, and LBP centrifugal roof exhaust fans provide the

industry’s best performance and durability for general clean

air applications. Series L exhaust fans have the broadest

performance in the industry, up to 1.25 in. wg (311 Pa) and

37,500 cfm (63,713 m3/hr).

The severe duty models LDP and LBP are far superior to

any centrifugal roof exhaust fan currently in the market.

Specifically designed for applications with extremely high

structural design load requirements. Designed with structural

steel supports and ESD-603D louver blades, the severe duty louver enclosure (SDLE) may be used in any

application which requires a fan to endure high winds with the potential of wind blown debris. Miami-Dade

notice of acceptance number 03-0422.05.

General Safety Information

2

®

Series L: Models LB, LBP, LD, and LDP

Receiving

Upon receiving the product, check to make sure

all items are accounted for by referencing the bill

of lading to ensure all items were received. Inspect

each crate for shipping damage before accepting

delivery. Notify the carrier if any damage is noticed.

The carrier will make notification on the delivery

receipt acknowledging any damage to the product.

All damage should be noted on all the copies of the

bill of lading which is countersigned by the delivering

carrier. A Carrier Inspection Report should be filled

out by the carrier upon arrival and reported to the

Traffic Department. If damaged upon arrival, file

a claim with carrier. Any physical damage to the

unit after acceptance is not the responsibility of

Greenheck Fan Corporation.

Unpacking

Verify that all required parts and the correct quantity

of each item have been received. If any items are

missing, report shortages to your local representative

to arrange for obtaining missing parts. Sometimes it

is not possible that all items for the unit be shipped

together due to availability of transportation and

truck space. Confirmation of shipment(s) must be

limited to only items on the bill of lading.

Handling

When lifting the unit to the roof, securely fasten

straps to the drive frame located in the motor

compartment. Access to the motor compartment is

accomplished by removing bolts securing the hood

to the base. The hood cover will need to be removed

for access to the drive frame. The cover can then

be removed and placed on a flat surface in an area

protected from strong winds.

When unit is on the roof, move fan to desired location

and fasten securely through mounting holes in base.

Shims may be necessary depending upon roof

material thickness.

The motor amperage and voltage ratings must be

checked for compatibility to supply voltage prior to

final electrical connection. Electrical lead-in wires

should be run through the conduit provided between

the curb and the bottom of the motor compartment.

Wiring must conform to local and national codes.

Storage

Fans are protected against damage during shipment.

If the unit cannot be installed and operated

immediately, precautions need to be taken to prevent

deterioration of the unit during storage. The user

assumes responsibility of the fan and accessories

while in storage. The manufacturer will not be

responsible for damage during storage. These

suggestions are provided solely as a convenience to

the user.

Indoor

The ideal environment for the storage of fans and

accessories is indoors, above grade, in a low

humidity atmosphere which is sealed to prevent the

entry of blowing dust, rain or snow. Temperatures

should be evenly maintained between 30° to 110°F

(-1° to 43°C), wide temperature swings may cause

condensation and “sweating” of metal parts. All

accessories must be stored indoors in a clean, dry

atmosphere.

Remove any accumulations of dirt, water, ice, or

snow and wipe dry before moving to indoor storage.

To avoid “sweating” of metal parts allow cold parts to

reach room temperature. To dry parts and packages

use a portable electric heater to remove any moisture

build up. Leave coverings loose to permit air

circulation and to allow for periodic inspection.

The unit should be stored at least 3½ inches (89 mm)

off the floor on wooden blocks covered with moisture

proof paper or polyethylene sheathing. Aisles

between parts and along all walls should be provided

to permit air circulation and space for inspection.

Outdoor

Fans designed for outdoor applications may be

stored outdoors, if absolutely necessary. Roads or

aisles for portable cranes and hauling equipment are

needed.

The fan should be placed on a level surface to

prevent water from leaking into the fan. The fan

should be elevated on an adequate number of

wooden blocks so it is above water and snow levels

and has enough blocking to prevent it from settling

into soft ground. Locate parts far enough apart to

permit air circulation, sunlight and space for periodic

inspection. To minimize water accumulation, place all

fan parts on blocking supports so rain water will run

off.

Do not cover parts with plastic film or tarps as these

cause condensation of moisture from the air passing

through heating and cooling cycles. Fan wheels

should be blocked to prevent spinning caused by

strong winds.

Inspection and Maintenance During

Storage

While in storage, inspect fans once per month. Keep

a record of inspection and maintenance performed.

If moisture or dirt accumulations are found on parts,

the source should be located and eliminated. At each

inspection, rotate the wheel by hand ten to fifteen

revolutions to distribute lubricant on motor. If paint

deterioration begins, consideration should be given

to touch-up or repainting. Fans with special coatings

may require special techniques for touch-up or

repair.

CAUTION

Do not lift by the fan hood. Avoid lifting fans in a

way that will bend or distort fan parts. Never pass

slings or timbers through the venturi of fan. Fans

with special coatings or paints must be protected

in handling to prevent damage.

3

Series L: Models LB, LBP, LD, and LDP

®

Machined parts coated with rust preventive should

be restored to good condition promptly if signs of

rust occur. Immediately remove the original rust

preventive coating with petroleum solvent and clean

with lint-free cloths. Polish any remaining rust from

surface with crocus cloth or fine emery paper and

oil. Do not destroy the continuity of the surfaces.

Thoroughly wipe clean with Tectyl® 506 (Ashland Inc.)

or the equivalent. For hard to reach internal surfaces

or for occasional use, consider using Tectyl® 511M

Rust Preventive, WD-40® or the equivalent.

C

A A

B

E

F

D

1.75

(44)

C

AF

D

E

B

1.75

(44)

B

AA

1.75

(44)

DC

F

E

B

AA

1.75

(44)

C

D

E

Series L Dimensions

Model LB Size A B C D E F Damper

Size

Roof

Opening

Weight

Galv.

10 22

(559)

39

(991)

28

(711)

17¼

(438)

17

(432)

3¼

(85)

12

(305)

14½

(368)

56

(25)

14 26

(660)

39

(991)

35

(889)

17½

(445)

18

(457)

4

(102)

16

(406)

18½

(470)

81

(37)

18 30

(762)

39

(991)

40

(1016)

17½

(445)

21

(533)

4½

(114)

18

(457)

20½

(521)

135

(61)

21 30

(762)

51

(1295)

43

(1092)

23

(584)

23

(584)

6

(152)

18

(457)

20½

(521)

145

(66)

24 34

(864)

51

(1295)

45½

(1156)

20½

(521)

23½

(597)

6¾

(171)

24

(610)

26½

(673)

188

(85)

30 40

(1016)

63

(1600)

50

(1270)

29½

(749)

265⁄8

(676)

8½

(216)

30

(762)

32½

(826)

249

(113)

36 46

(1168)

63

(1600)

60

(1524)

27

(686)

325⁄8

(829)

9¾

(248)

36

(914)

38½

(978)

338

(153)

42 52

(1321)

75

(1905)

705⁄8

(1794)

33½

(851)

373⁄8

(949)

11½

(292)

42

(1067)

44½

(1130)

396

(180)

48 58

(1473)

87

(2210)

703⁄8

(1788)

41

(1041)

41½

(1054)

115⁄8

(295)

48

(1219)

50½

(1283)

430

(195)

54 64

(1626)

87

(2210)

79½

(2019)

38

(965)

453⁄8

(1153)

12½

(318)

54

(1372)

56½

(1435)

596

(270)

Model LBP Size A B C D E F Damper

Size

Roof

Opening

Weight

Alum.

10 22

(559)

38½

(978)

28

(711)

14

(356)

17

(432)

325⁄8

(829)

12

(305)

14½

(368)

99

(45)

14 26

(660)

40

(1016)

32

(813)

16

(406)

17

(432)

26

(660)

16

(406)

18½

(470)

116

(53)

18 30

(762)

46

(1168)

36

(914)

19

(483)

24½

(622)

30

(762)

18

(457)

20½

(521)

179

(81)

21 30

(762)

46

(1168)

36

(914)

19

(483)

24½

(622)

30

(762)

18

(457)

20½

(521)

191

(86)

24 34

(864)

49½

(1257)

40

(1016)

20

(508)

23½

(597)

34

(864)

24

(610)

26½

(673)

239

(108)

30 40

(1016)

58

(1473)

46

(1168)

23

(584)

26½

(673)

40

(1016)

30

(762)

32½

(826)

318

(144)

36 46

(1168)

63

(1600)

51¾

(1314)

26

(660)

343⁄8

(873)

46

(1168)

36

(914)

38½

(978)

444

(201)

42 52

(1321)

70½

(1791)

58

(1473)

29

(737)

38¼

(972)

52

(1321)

42

(1067)

44½

(1130)

530

(240)

48 58

(1473)

76½

(1943)

64

(1626)

32

(813)

403⁄8

(1026)

58

(1473)

48

(1219)

50½

(1283)

579

(263)

54 64

(1626)

83½

(2121)

70

(1778)

35

(889)

435⁄8

(1108)

64

(1626)

54

(1372)

56½

(1435)

780

(354)

Model LD Size A B C D E F Damper

Size

Roof

Opening

Weight

Galv.

60-

75

17

(432)

22

(559)

27

(686)

13½

(343)

13

(330)

2

(51)

8

(203)

10½

(267)

37

(17)

80-

95

19

(483)

28

(711)

27

(686)

13½

(343)

16

(406)

4

(102)

10

(254)

12½

(318)

45

(20)

100-

120

22

(559)

30

(762)

27

(686)

13½

(343)

18

(457)

4

(102)

12

(305)

14½

(368)

57

(26)

Model LDP Size A B C D E F Damper

Size

Roof

Opening

Weight

Alum.

60-

75

17

(432

23

(584)

11½

(292)

13½

(343) —8

(203)

10½

(267)

49

(22)

80-

95

19

(483)

25

(635)

12½

(318)

16½

(419) —10

(254)

12½

(318)

63

(29)

100-

120

22

(559)

28

(711)

14

(356)

18½

(470) —12

(305)

14½

(368)

82

(37)

All dimensions given in inches (millimeters). Weights given in pounds (kilograms).

C

A A

B

E

F

D

1.75

(44)

C

AF

D

E

B

1.75

(44)

B

AA

1.75

(44)

DC

F

E

B

AA

1.75

(44)

C

D

E

C

A A

B

E

F

D

1.75

(44)

C

AF

D

E

B

1.75

(44)

B

AA

1.75

(44)

DC

F

E

B

AA

1.75

(44)

C

D

E

C

A A

B

E

F

D

1.75

(44)

C

AF

D

E

B

1.75

(44)

B

AA

1.75

(44)

DC

F

E

B

AA

1.75

(44)

C

D

E

4Series L: Models LB, LBP, LD, and LDP

®

Removing From Storage

As fans are removed from storage to be installed

in their final location, they should be protected

and maintained in a similar fashion until the fan

equipment goes into operation.

Pre-Startup Checks

1. Check all fasteners for tightness. The wheel

should rotate freely and be aligned as shown in

Figure 1.

2. Wheel position is preset and the unit is test

run at the factory. Movement may occur during

shipment, and realignment may be necessary.

3. Centering can be accomplished by loosening

the bolts holding the drive frame to the shock

mounts and repositioning the drive frame.

4. Wheel and inlet cone overlap can be adjusted

by loosening the setscrews in the wheel and

moving the wheel to the desired position.

5. Check wheel rotation by momentarily energizing

the unit. Rotation should be clockwise as shown

in Figure 2 and correspond to the rotation decal

on the unit. Rotation is determined when the unit

is viewed from the motor or shaft pulley side.

Pre-Starting Belt Tension Checks

6. Always loosen tension enough to install belt

without stretching, see Figure 3.

7. If adjustments are made, it is very important

to check the pulleys for proper alignment.

Misaligned pulleys lead to excessive belt wear

vibration, noise and power loss, see Figure 4.

8. Belt tension can be adjusted by loosening four

fasteners (marked “R” in Figure 5) on the drive

frame. This allows the motor plate to slide on the

drive frame angles for proper positioning.

9. Belt tension should be adjusted to allow 1⁄64 in.

(0.397 mm) of deflection per inch of belt span.

For example, a 15 in. (381 mm) belt span should

have 15⁄64 in. (0.234 mm) (or about 1⁄4 in. (6 mm))

of deflection with moderate thumb pressure at

mid-point between pulleys, see Figure 6.

Belt Span

G

C

l

o

c

k

w

i

s

e

CORRECT WRONG WRONGWRONG

64

Deflection = Belt Span

WHEEL ROTATION

All Series L fans have

clockwise (CW) wheel

rotation when viewed

from top of fan.

Figure 2

WARNING

Correct direction of wheel rotation is critical.

Reversed rotation will result in poor air

performance, motor overloading and possible

motor burnout.

Do not force belt(s). Forcing the

belt(s) will break the cords and

cause belt failure

.

BELTS

Figure 3

WARNING

The fan has been checked for mechanical noises at

the factory prior to shipment. If mechanical noise

should develop, suggested corrective actions are

offered in the Troubleshooting section.

WARNING

Over tightening will cause excessive bearing wear

and noise. Too little tension will cause slippage at

startup and uneven wear.

Figure 4

FASTENERS

*Identical fasteners on

opposing side must

also be loosened.

Figure 5

R

GH

WHEEL OVERLAP AND GAP DIMENSIONS

Model G - Overlap in. (mm) H - Gap in. (mm)

LD/LDP 60-095 – 3⁄32 (2)

LD/LDP 100-120 – 1⁄4 (6)

LB/LBP 10-14 1⁄4 (6) –

LB/LBP 18-24 3⁄8 (10) –

LB/LBP 30-54 1⁄2 (13) –

Figure 1

5

Series L: Models LB, LBP, LD, and LDP

®

10. The adjustable motor pulley is factory set for

the RPM specified. Speed can be increased by

closing or decreased by opening the adjustable

motor sheave.

11. Two groove variable pitch pulleys must be

adjusted an equal number of turns open or

closed.

12. Any increase in speed represents a substantial

increase in the horsepower required by a unit.

13. Motor amperage should always be checked to

avoid serious damage to the motor when speed

is varied.

Maintenance

Motor maintenance is generally limited to cleaning

and lubrication (where applicable). Cleaning should

be limited to exterior surfaces only. Removing dust

buildup on motor housing ensures proper motor

cooling.

Greasing of motors is only intended when fittings

are provided. Many fractional hp motors are

permanently lubricated and should not be lubricated

further. Motors supplied with grease fittings should

be greased in accordance with manufacturers’

recommendations. Where motor temperatures do not

exceed 104ºF (40ºC), the grease should be replaced

after 2000 hours of running time as a general rule.

Wheels require very little attention when moving

clean air. Occasionally, oil and dust may accumulate

causing imbalance. When this occurs, the wheel and

housing should be cleaned to ensure smooth and

safe operation.

All fasteners should be checked for tightness each

time maintenance checks are performed prior to

restarting unit.

A proper maintenance program will help these units

deliver years of dependable service.

Belt/Bearing Maintenance

1. Belts tend to stretch after a period of time. They

should be checked periodically for wear and

tightness. When replacing belts, use the same

type as supplied with the unit.

2. Matched belts should always be used on units

with multi-groove pulleys.

3. For belt replacement, loosen the tensioning

device far enough to allow removal of the belt

by hand. Do not force belts on or off. This may

cause cords to break, leading to premature belt

failure.

4. Once installed, adjust belts as shown in “Pre-

Starting Checks.”

5. Shaft bearings can be classified in two groups:

relubricating and non-relubricating. All bearings

are factory lubricated and require no further

lubrication under normal use (between -20ºF

and 180ºF (-29° to 82°C) in a relatively clean

environment).

6. Units installed in hot, humid or dirty locations

should be equipped with special bearings.

These bearings will require frequent lubrication.

Caution should be employed to prevent

overpacking or contamination.

7. Grease fittings should be wiped clean. The

unit should be in operation while lubricating.

Extreme care should be used around moving

parts.

8. Grease should be pumped in very slowly until a

slight bead forms around the seal. A high-grade

lithium base grease is recommended.

9. Direct drive units require little maintenance

except for cleaning, wheel alignment, and oiling

according to motor label instructions.

IMPORTANT

Adjust (tighten) belt tension after the first

24-48 hours of operation.

Belt Span

G

C

l

o

c

k

w

i

s

e

CORRECT WRONG WRONGWRONG

64

Deflection = Belt Span

Figure 6

WARNING

Always disconnect, lock and tag power source before

servicing. Failure to disconnect power source can

result in fire, shock or serious injury.

WARNING

Uneven cleaning of the wheel will produce an out of

balance condition that will cause vibration in the fan.

WARNING

This unit should be made non-functional when

cleaning the wheel or housing (fuses removed,

disconnect locked off).

6Series L: Models LB, LBP, LD, and LDP

®

Parts List

NOTE: Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information

will assist the local Greenheck representative and the factory in providing service and replacement parts. Before taking

any corrective action, make certain unit is not capable of operation during repairs.

CAUTION: A fan manufactured with an explosion-resistant motor does not certify the entire unit to be explosion proof.

Refer to UL Listing Mark for the fans approved usage.

FABRA HOOD STYLE

FAN SHAFT

DRIVE

ASSEMBLY

HINGED

ACCESS

BIRDSCREEN

CURB CAP

WINDBAND

MOTOR

WHEEL

DRIVE

FRAME

VIBRATION

ISOLATORS

HOOD COVER

LOUVERED

PENTHOUSE

MOTOR

DRIVE

FRAME

DRIVE

ASSEMBLY

FAN

SHAFT

WHEEL

BIRDSCREEN

7

Series L: Models LB, LBP, LD, and LDP

®

Troubleshooting

WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.

PROBLEM CAUSE CORRECTIVE ACTION

Reduced Airflow

System resistance too high Check system for proper operation of backdraft or

control dampers; remove obstructions in ductwork, etc.

Unit running backwards See Pre-Starting Checks.

Fan speed too low Increase fan speed.

Excessive dirt buildup on

wheel Clean wheel.

Improper wheel alignment Center wheel on inlets.

Excessive Noise

or Vibration

Bad Bearings Replace.

Belts too tight or too loose Refer to Figure 4 and adjust tension.

Wheel improperly aligned and

rubbing Center wheel on inlets. See Figure 1.

Loose drive or motor pulleys Align and tighten. See Pre-Start-up Checks.

Foreign objects in wheel or

housing Remove objects, check for damage or unbalance.

Unbalance of wheel caused

by excessive dirt and grease

buildup

Remove buildup.

Job Information

Job Name:___________________________________ Service Organization: _________________________________

Address: ____________________________________ Address: _____________________________________________

City: ________________________________________ City: _________________________________________________

State: _______________ Zip: __________________ State: _______________ Zip: __________________________

Phone: ______________________________________ Phone: ______________________________________________

Contact Person: ______________________________ Work Done By: _______________________________________

Nameplate Information Field Start-Up Documentation

Model: ______________________________________

Volts: ________ Hertz: ________ Phase: ______ Actual Voltage: _______ Hertz: ______ Phase: _________

Amps: _______________ Mark: ________________ Actual Amperage: ____________________________________

Supply hp: ___________ Exhaust hp: __________ Blower Rotation: _____________________________________

Serial Number: _______________________________ Air Volume: Design cfm: _____________________________

Model Voltage: _______________________________ Actual cfm: ______________________________

Motor Amperage: ____________________________ Level of fan (L or H): __________________________________

Fan RPM: ___________________________________ Fan RPM Range (min.) ___________ (max.) _____________

Maintenance Documentation

8453283 • LB/LBP/LD/LDP Series L IOM • Rev. 2, June 2008 Copyright 2008 © Greenheck Fan Corp.

Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year

from the purchase date. Any units or parts which prove defective during the warranty period will be replaced at

our option when returned to our factory, transportation prepaid. Motors are warranted by the motor manufacturer

for a period of one year. Should motors furnished by Greenheck prove defective during this period, they should

be returned to the nearest authorized motor service station. Greenheck will not be responsible for any removal or

installation costs.

As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications

without notice.

Greenheck Catalog Series L provides additional

information describing the equipment, fan performance,

available accessories, and specification data.

®

Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: gfcinfo@greenheck.com • Website: www.greenheck.com

Warranty

AMCA Publication 410-96, Safety Practices for Users and

Installers of Industrial and Commercial Fans, provides

additional safety information. This publication can be obtained

from AMCA International, Inc. at: www.amca.org.

Maintenance Log

Date Time Notes