Greenheck SFB Series User manual

MODEL SFB

MODEL SFD MODEL SWB

Series 100

MODEL SWB

Series 200

TABLE OF CONTENTS

MOTOR AND DRIVE INSTALLATION (UNITS SHIPPED FROM STOCK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

EFFECT OF INSTALLATION ON PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

UL 762 – RESTAURANT EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

PRE-STARTING CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

BELT-DRIVE FAN MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

BEARING LUBRICATION SCHEDULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

MOTOR MAINTENANCE (BELT AND DIRECT DRIVE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

TROUBLESHOOTING CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

READ AND SAVE THESE INSTRUCTIONS

Centrifugal Utility Fans

Model SWB (Series 100 & 200)

Models SFB and SFD

PN 455308

Installation, Operation and Maintenance Manual

MOTOR AND DRIVE INSTALLATION INSTRUCTIONS

(For Model SWB units shipped from stock without motors or drives)

[ ] 1. Adjust motor pulley to its closed position

for maximum fan speed or increments of 1/2 turn

open (maximum of 5 turns open) for reduced fan

speed. Tighten set screw on flat area only. [ ] 4. Install shaft pulley to fan shaft.

[ ] 5. Install drive belt(s). Belts should not be

forced over pulleys. Align motor and shaft pulleys

with a straight edge. Tighten all set screws.

[ ] 6. Adjust belt tension. See page 5 for belt

tensioning instructions.

[ ] 2. Install motor pulley to the motor shaft and

install motor to the motor plate. Prepunched holes

are provided for most common motor frame sizes.

[ ] 3. If supplied, install taperlock bushing into

shaft pulley.

INSTALLATION

Inspect the unit for any damage and report it to the

shipper immediately. Also, check to see that all

accessory items are accounted for.

Move the fan to the desired location and fasten

securely through mounting holes provided in the base

angles. The unit must be set level (Shimming may be

necessary). Flexible duct connections and vibration

isolators should be used where noise is a factor.

The motor voltage and ampere rating must be

checked for compatibility with the electrical supply

prior to final electrical connection. Supply wiring to the

fan must be properly fused and conform to local and

national electrical codes.

The discharge is factory set as specified by customer

order, however, it can be rotated to other discharge

positions in the field if necessary. Removal of the

housing bolts allows the discharge to be rotated to

the clockwise positions below (Fig. 1). For TAD, BD

and BAD discharge positions a portion of the frame

angle must be removed.

VIEWED FROM DRIVE SIDE OF THE FAN

Fig. 1

Clockwise rotation shown. Counterclockwise

discharge positions are a mirror image of those

shown. The SWB 100 Series is clockwise rotation

only. Fan rotation is always viewed from the drive

side of the housing.

EFFECT OF INSTALLATION

ON PERFORMANCE

Restricted or unstable flow at the fan inlet can cause

pre-rotation of incoming air or uneven loading of the

fan wheel, yielding large system losses, increased

sound levels and structural failure of the fan wheel.

Free discharge or turbulent flow in the discharge

ductwork will also result in system effect losses.

The examples below show the system layout and inlet

and discharge configurations which can affect fan

performance.

INSTALLATION OF UL 762 LISTED FANS FOR RESTAURANT EXHAUST

The UL 762 listing for restaurant exhaust is available on SWB 200 Series fan sizes 10-36 with a weatherhood. UL

762 fans are listed for a maximum operating temperature of 375°F and include a bolted access door and 1" drain

connection. An outlet guard is

strongly recommended when the

fan discharge is accessible. An

upblast discharge is recommended.

The fan discharge must be a

minimum of 40" above the roof

line and the exhaust duct must

be fully welded to a distance of 18"

above the roof surface.

This drawing is for dimensional

information only. See the latest

edition of NFPA 96 Standard for

Ventilation Control and Fire

Protection of Commercial

Cooking Operations for detailed

installation instructions, materials,

duct connections and clearances.

40"**

18"*

Duct

From

Kitchen

Hood

Upblast Discharge

Weatherhood

** Per NFPA 96 the fan discharge

must be a minimum of 40"

above the roof surface.

* Per NFP

A 96 the duct must be

all welded construction to a

minumum distance of 18"

above the roof surface.

CW BH CW BAU CW TAUCW UB

CW TH CW TAD

CW BAD

CW DB

Good Poor Poor

Good Poor

Good

Good Good Good

Poor

Poor Good

Good

Poor

Not greater than 60°

included angle

Distance should be at

least 1/2 dia.

ONE FAN DIA.

7°Max.

Unit

Size

6 - - - 3/8 -

7 - - - 3/8 -

9 - - - 1/2 1/2

10 3/8 1/4 5/32 1/2 1/2

12 3/8 - 5/32 - 1/2

13 7/16 1/4 5/32 - 1/2

15 1/2 1/4 5/32 - 1/2

16 1/2 1/4 5/32 - -

18 5/8 3/8 5/32 - 1/2

20 5/8 3/8 5/32 - 5/8

22 11/16 - 5/32 - 5/8

24 3/4 3/8 5/32 - -

25 - - - - 3/4

27 7/8 - 3/16 - 3/4

30 15/16 1/2 3/16 - 3/4

33 1-1/16 - 3/16 - -

36 1-3/16 1/2 3/16 - -

PRE-STARTING CHECKS

Wheels must rotate freely and not rub on the inlet

venturi. Model SWB wheels overlap the inlet venturi

as shown in Figure 2. Refer to the SWB fan wheel

overlap and radial gap chart for proper dimensions.

Models SFD and SFB wheels do not overlap the

venturi, but have a gap between the inlet venturi and

the wheel (Fig. 3). Wheel position is preset at the

factory and the unit is test run. Wheel movement

may occur during shipment or installation and wheel

alignment may be necessary.

On belt drive units, centering can be accomplished

by (1) loosening the inlet cone bolts to move the

inlet cone or by (2) loosening the bearings in order

to move the shaft. Wheel and inlet cone overlap can

be adjusted by loosening the wheel hub set screw

and moving the wheel to the desired position.

Tighten all fasteners and set screws securely and

realign drive pulleys after adjustment. Check pulleys

and belts for proper alignment to avoid unnecessary

belt wear, noise, vibration and power loss. Motor

and drive shafts must be parallel and pulleys in line

(Fig. 4)

The adjustable motor pulley is set at the factory for

the fan RPM specified by the customer. Fan RPM

can be increased by closing or decreased by

opening the adjustable motor pulley. Multi-groove

variable pitch pulleys must be adjusted an equal

number of turns open or closed. Any increase in fan

speed represents a substantial increase in load on

the motor.

To avoid motor overheating and possible burnout,

motor load amperes should always be checked and

compared to nameplate rating when fan speed is

increased.

Rotation direction of the wheel is critical and

incorrect rotation will result in reduced air

performance, increased motor loading and possible

motor burnout.

MODEL SWB

Fig. 2

Wrong Wrong Right

Fig. 4

APPROXIMATE WHEEL CLEARANCE DIMENSIONS

Overlap (inches)

Series

100

Series

200

Radial Gap

(inches)

SWB SFD

GAP

(in.)

SFB

GAP

(in.)

MODEL SFD OR SFB

Fig. 3

Gap

Wheel

Radial

Gap

Overlap

Wheel

BLOWER MAINTENANCE (BELT DRIVE)

Belts tend to stretch after a period of time. They

should be periodically checked for tension and

wear. When replacing belts, use the same type as

supplied with the unit. Replacement of belts should

be accomplished by loosening the tensioning “L-

bolts” so the belts may be removed by hand. Do not

force belts on or off as this may cause breakage of

cords and lead to premature belt failure.

Belt tension should be adjusted to allow 1/64" of

belt deflection per 1" of belt span. For example, a

16" belt span should have 16/64" or 1/4" of

deflection with moderate thumb pressure at mid-

point between the pulleys. (Fig. 6).

Shaft bearings are the most critical moving part of a

fan. Therefore, special attention should be given to

keeping the bearings clean and well lubricated.

Proper lubrication provides for reduction in friction

and wear, transmission and dissipation of heat,

extended bearing life and prevention of rust.

In order for a lubricant to fulfill these tasks, the

proper grease applied at regular intervals is

required. See the recommended bearing lubrication

schedule.

Check wheel rotation by momentarily

energizing the unit and noting if rotation is in

the same direction as the airflow at the outlet

and conforms to the rotation decal affixed to

the unit (Fig. 5). NOTE: Models SFD and SFB

units should be operated only when attached

to the system for which they were designed.

Without proper system static pressure the

motor could be seriously overloaded.

***************************************************************************

WARNING

DISCONNECT AND SECURE TO THE “OFF” POSITION ALL ELECTRICAL POWER TO THE FAN PRIOR

TO INSPECTION OR SERVICING. FAILURE TO COMPLY WITH THIS SAFETY PRECAUTION COULD

RESULT IN SERIOUS INJURY OR DEATH.

***************************************************************************

Fig. 6

BEARING LUBRICATION SCHEDULE

FOR GREENHECK UTILITY FANS

(Relubrication schedule in months)

Fig. 5 WHEELS VIEWED FROM

THE DRIVE SIDE

FAN RPM

To 500 6 6

500-1000 6 5

1000-1500 5 4

1500-2000 4 3

2000-2500 4 2

2500-3000 3 1

3000-3500 2 1

3/4 to 1 1/2 1 3/4 to 2

Shaft Diameter in inches

Backward Inclined

Forward Curved

Airflow

Deflection = Belt Span

Belt Span

If unusual conditions exist - temperatures below

32°F or above 200°F, moisture or contaminants -

more frequent lubrication is required.

With the unit running add grease very slowly with a

manual grease gun until a slight bead of grease

forms at the seal.

Be careful not to unseat the seal by over lubricating

or using excessive pressure. A guide to the amount

of grease to be used is to fill 30% to 60% of

available space in the bearing and housing.

A high quality lithium based grease conforming to

NLGI Grade 2 consistency, such as those listed

below, should be used.

Mobil 532

Mobilux #2

B Shell Alvania #2

Texaco Multifak #2

Texaco Premium #2

Unirex N2

In addition to lubricating the bearings at specified

intervals, set screws in the bearing collars should be

checked for tightness. A bearing collar which has

loosened will cause premature failure of the fan

shaft. Fasteners attaching the bearings to the drive

frame should also be checked.

MOTOR MAINTENANCE

(BELT AND DIRECT DRIVE)

Motor maintenance is generally limited to cleaning

and lubrication (where applicable). Cleaning should

be limited to exterior surfaces only. Removing dust

and grease build-up on the motor housing assures

proper motor cooling. Use caution and do not allow

water or solvents to enter the motor or bearings.

Under no circumstances should motors or bearings

be sprayed with steam, water or solvents.

Greasing of motors is intended only when fittings

are provided. Many fractional horsepower motors

are permanently lubricated for life and require no

further lubrication. Motors supplied with grease

fittings should be greased in accordance with the

manufacturer’s recommendations.

WHEEL AND FASTENER

MAINTENANCE

Wheels require very little attention when exhausting

clean air, however air heavily laden with grease or

dirt will tend to accumulate on the wheel causing

unbalance. Wheels exhausting dirty or grease laden

air require frequent cleaning to assure smooth and

safe operation.

All fasteners, including set screws in the bearing

collars, should be checked for tightness each time

maintenance checks are performed.

A proper maintenance program will help preserve

the performance and reliability designed into the

fan.

PARTS LIST

Always provide the unit model and serial number when requesting parts or information.

REPLACEMENT PARTS

1. Scroll housing

2. Drive frame - Base angle

3. Intake support panel

4. Inlet ring and cone

5. Wheel (Specify rotation)

6. Drive frame assembly

7. Pillow block bearings

8. Fan shaft

9. Shaft pulley

10. Belt

11. Motor pulley

12. Belt tensioning bolts

13. Motor plate

14. Motor

13 12

Problem

Excessive

Noise

Low

CFM

High

CFM

Static

Pressure

Wrong

High

Horsepower

Fan

Doesn’t

Operate

Overheated

Bearing

NOTE: Always provide the unit model and serial numbers when requesting parts or service information.

*Always check motor amps and compare to nameplate rating. Excessive fan speed may overload the motor

and result in burnout.

IOM SWB/SFB/SFD FS

Rev. 2 February 2001

Wheel Rubbing Inlet Adjust wheel and/or inlet cone. Tighten wheel

hub or bearing collars on shaft.

V-Belt Drive

Tighten sheaves on motor/fan shaft. Adjust

belt tension. Align sheaves properly

(see page 4). Replace worn belts

or sheaves.

Bearings Replace defective bearing(s). Lubricate

bearings. Tighten collars & fasteners.

Wheel Unbalance Clean all dirt off wheel. Check wheel

balance, rebalance in place if necessary.

Fan Check wheel for correct rotation.

Increase fan speed.*

Duct System See page 3.

Fan Decrease fan speed.

Duct System Resize ductwork. Access door,

filters, grills not installed.

Duct system has

more or less

restriction than

anticipated

Change obstructions in system. Use

correction factor to adjust for

temperature/altitude. Resize ductwork.

Clean filters/coils. Change fan speed.*

Fan Check rotation of wheel. Reduce

fan speed.

Duct

System

Resize ductwork. Check proper operation

of face and bypass dampers. Check

filters and access doors.

Electrical

Supply

Check fuses/circuit breakers. Check for

switches off. Check for correct

supply voltage.

Drive Check for broken belts. Tighten

loose pulleys.

Motor Assure motor is correct horsepower

and not tripping overload protector.

Lubrication Check for excessive or insufficient grease

in the bearing.

Mechanical

Replace damaged bearing. Relieve excessive

belt tension. Align bearings.

Check for bent shaft.

Cause Corrective Action

TROUBLESHOOTING

GREENHECK

P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410

PH. 715-359-6171

www.greenheck.com

Warranty

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.

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