Greenheck SWB 100 Series, SFB Series, SWB 200 Series, SFD Series Installation, Operation And Maintenance Manual

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Page 1

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

Page 2

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.

Page 3

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.

Good Poor Poor

Good

Good Good Good

Poor

Good

Not greater than 60° included angle

7° Max.

CW BH CW BAU CW TAUCW UB

CW TH CW TAD

CW DB

CW BAD

Poor

Distance should be at least 1/2 dia.

Poor

Good

ONE FAN DIA.

Poor

40"**

** Per NFPA 96 the fan discharge must be a minimum of 40" above the roof surface.

Weatherhood

Upblast Discharge

A 96 the duct must be

Duct From Kitchen Hood

18"*

* Per NFP all welded construction to a minumum distance of 18" above the roof surface.

Page 4

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

Radial Gap

Overlap

Wheel

Gap

Wheel

Page 5

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 “Lbolts” 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 midpoint 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.

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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.

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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

Airflow

Backward Inclined

Airflow

Forward Curved

Belt Span

Deflection =

Belt Span

Page 6

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.

Page 7

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

Page 8

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.