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Republic Centrifugal Blowers RB500

Owner’s Manual

RBS

Republic Blower Systems®

www.republicsales.com Created 12.05

280-0500 © 2005 Republic Sales & Manufacturing®

RepublicRBS �

Republic Blowers SystemsRepublic Centrifugal Blower Owner’s Manual

Republic Centrifugal Blowers RB500Owner’s Manual


5131 Cash RoadDallas, TX 75247(214) [email protected]

WarningService procedures should only be performed by trained service personnel.

ImportantRead the following safety instructions carefully. Disconnect blower from electrical source before attempting service.

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Table of ContentsContact Us ........................................................................................................................................................................2

Safety Instructions ........................................................................................................................................................4

Blower Description and Model Identification .............................................................................................5

Specifications and Dimensional Data Baldor RB500 Diagram ..............................................................................................................................................6 Reliance RB500 Diagram ..........................................................................................................................................7 Equipment Arrival and Inspection .....................................................................................................................8

Installation .........................................................................................................................................................................8

Electric Motors Electric Motor Information .......................................................................................................................................9 Baldor .......................................................................................................................................................................9-23 Reliance.................................................................................................................................................................. 24-38

Motor Wiring and Start-Up .................................................................................................................................. 38

Motor Pulley Motor Pulley Diagram ............................................................................................................................................. 39 Motor Pulley Information ....................................................................................................................................... 40 Motor Pulley Installation ......................................................................................................................................... 41 Motor Pulley Removal ............................................................................................................................................. 42

Blower Head Rotation ............................................................................................................................................ 43

Mounting Plate Position ........................................................................................................................................ 44

Exploded Parts Drawings RB500 Assembly with 3 HP Motor ...................................................................................................................... 45 RB500 Assembly with 5 HP Motor ...................................................................................................................... 46 RB500 Assembly with 7.5 HP Motor .................................................................................................................. 47 RB500 Assembly for 90 IEC Frame...................................................................................................................... 48 RB500 Assembly for 100 IEC Frame .................................................................................................................. 49 RB500 Filter Assembly ............................................................................................................................................. 50

Trouble Shooting Guidelines ....................................................................................................................... 51-52

Warranty Statement ................................................................................................................................................ 53

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Safety Instructions

1. Always use qualified electrical and mechanical personnel for installation and maintenance of Republic Blowers and motors.

2. Disconnect the electrical power at the motor starter, fuse box or circuit breaker before working on the system. Take special precautions to make sure the power cannot be turned on while you are working on the blower. Use an approved Lock Out/Tag Out system.

3. Make sure the motor is electrically grounded, the mounting bolts are properly secured, and all guards are in place before start-up.

4. Wear safety glasses and earplugs when working on the blower, air knife or discharge nozzles within a Republic Blower system.

5. Do not operate blower/motor assembly with the belt guard removed. Make sure to install the inlet air filter or piping to blower inlet, before starting the blower/motor.

6. Do not operate blower with the outlet open to atmosphere. Connect system piping or butterfly valve to prevent overloading the motor. Check the final installation for proper amp loads.

7. Keep all tools, lose clothing and hands away from rotating or moving parts while the unit is running. Never run the blower unit without the belt guard installed.

8. Inspect the blower at regular intervals for damaged or worn parts. Replace damaged parts immediately! Do not connect or turn on a damaged blower!

9. Inspect the inlet air filter at regular intervals and replace when necessary. A dirty air filter can cause improper blower performance.

10. Use only genuine Republic Blower brand replacement parts.

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Description and Model IdentificationRepublic Blower Systems are industrial grade centrifugal blowers capable of producing high velocity air, for drying or cleaning parts, at low operating costs. Three models are available:

RB500: Compact Model with 3-7.5 HP Motor Sizes

RB800: Compact Model with or without Motor. 3-15 HP Motor Sizes

RB1200HC: Standard Model with or without Motor. 3-25 HP Motor Sizes

RB2400: Dual Headed Model with or without Motor. 25-50 HP Motor Sizes

Republic Blowers have a nameplate containing the serial and model number located on the blower head near the exhaust port. The motor manufacturers’ nameplate is located on the motor. When placing a service call, please provide the Republic serial number. Call us at (800) 847-0380 or e-mail [email protected].

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HP A B C D E F G H3 (182T) 17.75 7 1/4 4 1/2 20 1/8 7 1/2 10 1/4 5/8 7 1/25 (184T) 17.75 7 1/4 5 1/2 20 1/8 7 1/2 10 1/4 5/8 7 1/27 1/2 (213T) 20.36 8 5 1/2 20 7/8 8 1/2 11 3/4 1/8 8 1/4

HP Est. WGT. (lbs)3 (182T) 1245 (184T) 1327 1/2 (213T) 198

Baldor RB500 Blower Dimensions 200-5000

Retro Kit Est. WGT. (lbs) 50

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Reliance RB500 Blower Dimensions 200-5000

HP A B C D E F G H3 (182T) 17.42 7 1/4 4 1/2 20 1/8 7 1/2 10 1/4 5/8 7 1/25 (184T) 18.41 7 1/4 5 1/2 20 1/8 7 1/2 10 1/4 5/8 7 1/27 1/2 (213T) 20 8 5 1/2 20 7/8 8 1/2 11 3/4 1/8 8 1/4

HP Est. WGT. (lbs)3 (182T) 1285 (184T) 1427 1/2 (213T) 163

Retro Kit Est. WGT. (lbs) 50

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Equipment Arrival and InspectionInspect the blower system at time of receipt to ensure that all components and accessories, as noted on the packing slip, were received and in good condition. Verify that the serial number on the packing slip matches the serial number shown on the blower head nameplate. Inspect the blower and motor assembly to ensure that the motor horsepower and voltage are correct.

If any equipment was damaged in transit, you will need to make a claim against the freight carrier immediately. If you have any shortages, discrepancies, or damage, please call your Republic Blower Systems Distributor or Republic Blower Systems at (800) 847-0380.

InstallationLift the blower system by the lifting eye mounted on the top of the motor or by picking the blower up from underneath the motor. Do not lift the blower by the belt guard. Vibration isolators are included with every blower. Bolt your Republic Blower in place by the mounting brackets supplied with the blower. Use a minimum of four (4) mounting bolts. See the Specifications Section of the manual for equipment weights.

1. Have a qualified electrician configure the motor to your incoming voltage as noted in the Motor Wiring Section of the manual. Refer to the nameplate on the motor for the correct power supply requirements.

2. The blower should be located in a place where the drive belt and intake air filter can be easily serviced and maintained.

3. Avoid any type of liquid over spray or continuous wash down of the blower. Shield the blower if needed. Flooding the blower can cause damage to the system.

4. Double check the pulley alignment and install the belt as shown in the Motor Pulley and Installation Belt diagrams. Be sure to re-fasten the belt guard.

5. Install the inlet air filter – Improper filtration will void warranty. Install system piping and check motor amperage draw. High amperage draw may indicate too much flow. Contact Republic Blower Systems or the local distributor with any questions.

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Electric Motors

Republic motors are selected for their field proven reputation in the industrial environment.

All systems are provided with rubber motor mount vibration isolators, which should be inspected periodically for cracks.

Each motor is shipped with the motor manufacturer’s installation and maintenance instructions attached.

Motor bearing lubrication schedules are listed in the motor manufacturer’s literature attached with the motor.

Integral HorsepowerAC Induction Motors

ODP EnclosureTEFC EnclosureExplosion Proof

Installation & Operating Manual

7/01 MN400

RepublicRBS 10


Table of Contents

Table of Contents iMN�00

Section 1General Information 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Limited Warranty 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Notice 1-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiving 1-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage 1-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unpacking 1-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Handling 1-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 2Installation & Operation �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Location �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mounting �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alignment �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Doweling & Bolting �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Connection �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conduit Box �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC Power �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

First Time Start Up �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coupled Start Up �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Jogging and Repeated Starts �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 3Maintenance & Troubleshooting �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Inspection �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lubrication & Bearings �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Type of Grease �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lubrication Intervals �-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lubrication Procedure �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessories �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting Chart �-�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Section 1General Information

General Information 1-1MN�00

Overview This manual contains general procedures that apply to Baldor Motor products. Be sure to read andunderstand the Safety Notice statements in this manual. For your protection, do not install, operate orattempt to perform maintenance procedures until you understand the Warning and Caution statements. AWarning statement indicates a possible unsafe condition that can cause harm to personnel. A Cautionstatement indicates a condition that can cause damage to equipment.

Important: This instruction manual is not intended to include a comprehensive listing of all details for allprocedures required for installation, operation and maintenance. This manual describes generalguidelines that apply to most of the motor products shipped by Baldor. If you have a questionabout a procedure or are uncertain about any detail, Do Not Proceed. Please contact your Baldordistributor for more information or clarification.

Before you install, operate or perform maintenance, become familiar with the following:� NEMA Publication MG-�, Safety Standard for Construction and guide

for Selection, Installation and Use of Electric Motors and Generators.� The National Electrical Code� Local codes and Practices

Limited Warranty

1. Baldor Electric motors are warranted for a period of one (1) year, from date of shipment from the factory or factorywarehouse against defects in material and workmanship. To allow for stocking and/or fabrication period and toprovide one year of actual service, the warranty period is extended for an additional period of six (�) months for atotal of eighteen (1�) months from the original date of shipment from the factory or factory warehouse stock. In nocase will the warranty period be extended for a longer period. Baldor extends this limited warranty to each buyerof the electric motor for the purpose of resale and to the original purchaser for use.

�. Baldor will, at its option repair or replace a motor which fails due to defects in material or workmanship during thewarranty period if:a. the purchaser presents the defective motor at or ships it prepaid to, the Baldor plant in Fort Smith, Arkansas

or one of the Baldor Authorized Service Centers andb. the purchaser gives written notification concerning the motor and the claimed defect including the date

purchased, the task performed by the Baldor motor and the problem encountered.�. Baldor will not pay the cost of removal of any electric motor from any equipment, the cost of delivery to Fort Smith,

Arkansas or a Baldor Authorized Service Center, or the cost of any incidental or consequential damages resultingfrom the claimed defects. (Some states do not allow the exclusion or limitation of incidental or consequentialdamages, so the above exclusion may not apply to you.) Any implied warranty given by laws shall be limited tothe duration of the warranty period hereunder. (Some states do not allow limitations on how long an impliedwarranty lasts, so the above limitation may not apply to you.)

�. Baldor Authorized Service Centers, when convinced to their satisfaction that a Baldor motor developed defects inmaterial or workmanship within the warranty period, are authorized to proceed with the required repairs to fulfillBaldor’s warranty when the cost of such repairs to be paid by Baldor does not exceed Baldor’s warranty repairallowance. Baldor will not pay overtime premium repair charges without prior written authorization.

�. The cost of warranty repairs made by centers other than Baldor Authorized Service Centers WILL NOT be paidunless first authorized in writing by Baldor.

�. Claims by a purchaser that a motor is defective even when a failure results within one hour after being placed intoservice are not always justified. Therefore, Baldor Authorized Service Centers must determine from the conditionof the motor as delivered to the center whether or not the motor is defective. If in the opinion of a BaldorAuthorized Service Center, a motor did not fail as a result of defects in material or workmanship, the center is toproceed with repairs only if the purchaser agrees to pay for such repairs. If the decision is in dispute, thepurchaser should still pay for the repairs and submit the paid invoice and the Authorized Service Center’s signedservice report to Baldor for further consideration.

�. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.Note that Baldor Super–E� Premium Efficiency electric motors are warranted for a period of three (�) years.All other terms and conditions of the Limited Warranty statement apply.

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1-� General Information MN�00

Safety Notice: This equipment contains high voltage! Electrical shock can cause serious or fatal injury.Only qualified personnel should attempt installation, operation and maintenance ofelectrical equipment.Be sure that you are completely familiar with NEMA publication MG-�, safety standardsfor construction and guide for selection, installation and use of electric motors andgenerators, the National Electrical Code and local codes and practices. Unsafeinstallation or use can cause conditions that lead to serious or fatal injury. Only qualifiedpersonnel should attempt the installation, operation and maintenance of this equipment.

WARNING: Do not touch electrical connections before you first ensure thatpower has been disconnected. Electrical shock can cause seriousor fatal injury. Only qualified personnel should attempt theinstallation, operation and maintenance of this equipment.

WARNING: Be sure the system is properly grounded before applying power.Do not apply AC power before you ensure that all groundinginstructions have been followed. Electrical shock can causeserious or fatal injury. National Electrical Code and Local codesmust be carefully followed.

WARNING: Avoid extended exposure to machinery with high noise levels. Besure to wear ear protective devices to reduce harmful effects toyour hearing.

WARNING: This equipment may be connected to other machinery that hasrotating parts or parts that are driven by this equipment. Improperuse can cause serious or fatal injury. Only qualified personnelshould attempt to install operate or maintain this equipment.

WARNING: Do not by-pass or disable protective devices or safety guards.Safety features are designed to prevent damage to personnel orequipment. These devices can only provide protection if theyremain operative.

WARNING: Avoid the use of automatic reset devices if the automatic restartingof equipment can be hazardous to personnel or equipment.

WARNING: Be sure the load is properly coupled to the motor shaft beforeapplying power. The shaft key must be fully captive by the loaddevice. Improper coupling can cause harm to personnel orequipment if the load decouples from the shaft during operation.

WARNING: Use proper care and procedures that are safe during handling,lifting, installing, operating and maintaining operations.Improper methods may cause muscle strain or other harm.

WARNING: Before performing any motor maintenance procedure, be sure thatthe equipment connected to the motor shaft cannot cause shaftrotation. If the load can cause shaft rotation, disconnect the loadfrom the motor shaft before maintenance is performed. Unexpectedmechanical rotation of the motor parts can cause injury or motordamage.

WARNING: Disconnect all electrical power from the motor windings andaccessory devices before disassembly of the motor. Electricalshock can cause serious or fatal injury.

WARNING: Do not use these motors in the presence of flammable orcombustible vapors or dust. These motors are not designed foratmospheric conditions that require explosion proof operation.

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General Information 1-�MN�00

Safety Notice ContinuedWARNING: Motors that are to be used in flammable and/or explosive

atmospheres must display the UL label on the nameplate.

Specific service conditions for these motors are defined in NEC 70-599.

WARNING: UL rated motors must only be serviced by authorized BaldorService Centers if these motors are to be returned to a flammableand/or explosive atmosphere.

Caution: To prevent premature equipment failure or damage, only qualifiedmaintenance personnel should perform maintenance.

Caution: Do not lift the motor and its driven load by the motor liftinghardware. The motor lifting hardware is adequate for lifting only themotor. Disconnect the load from the motor shaft before moving themotor.

Caution: If eye bolts are used for lifting a motor, be sure they are securelytightened. The lifting direction should not exceed a 20° angle fromthe shank of the eye bolt or lifting lug. Excessive lifting angles cancause damage.

Caution: To prevent equipment damage, be sure that the electrical service isnot capable of delivering more than the maximum motor rated ampslisted on the rating plate.

Caution: If a HI POT test (High Potential Insulation test) must be performed,follow the precautions and procedure in NEMA MG-1 and MG-2standards to avoid equipment damage.

If you have any questions or are uncertain about any statement or procedure, or if yourequire additional information please contact your Baldor distributor or an AuthorizedBaldor Service Center.

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1-� General Information MN�00

Receiving Each Baldor Electric Motor is thoroughly tested at the factory and carefully packaged forshipment. When you receive your motor, there are several things you should doimmediately.

1. Observe the condition of the shipping container and report any damageimmediately to the commercial carrier that delivered your motor.

�. Verify that the part number of the motor you received is the same as the partnumber listed on your purchase order.

Storage If the motor is not put into service immediately, the motor must be stored in a clean, dryand warm location. Several precautionary steps must be performed to avoid motordamage during storage.

1. Use a “Megger” periodically to ensure that the integrity of the winding insulationhas been maintained. Record the Megger readings. Immediately investigateany significant drop in insulation resistance.

�. Do not lubricate bearings during storage. Motor bearings are packed withgrease at the factory. Excessive grease can damage insulation quality.

�. Rotate motor shaft at least 10 turns every two months during storage (morefrequently if possible). This will prevent bearing damage due to storage.

�. If the storage location is damp or humid, the motor windings must be protectedfrom moisture. This can be done by applying power to the motors’ spaceheater (if available) while the motor is in storage.

Unpacking Each Baldor motor is packaged for ease of handling and to prevent entry ofcontaminants.

1. To avoid condensation inside the motor, do not unpack until the motor hasreached room temperature. (Room temperature is the temperature of the roomin which it will be installed). The packing provides insulation from temperaturechanges during transportation.

�. When the motor has reached room temperature, remove all protective wrappingmaterial from the motor.

Handling The motor should be lifted using the lifting lugs or eye bolts provided.1. Use the lugs or eye bolts provided to lift the motor. Never attempt to lift the

motor and additional equipment connected to the motor by this method. Thelugs or eye bolts provided are designed to lift only the motor. Never lift themotor by the motor shaft.

�. If the motor must be mounted to a plate with the driven equipment such aspump, compressor etc., it may not be possible to lift the motor alone. For thiscase, the assembly should be lifted by a sling around the mounting base. Theentire assembly can be lifted as an assembly for installation. Do not lift usingthe motor lugs or eye bolts provided.

If the load is unbalanced (as with couplings or additional attachments)additional slings or other means must be used to prevent tipping. In any event,the load must be secure before lifting.

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Section 2Installation & Operation

Installation & Operation �-1MN�00

Overview Installation should conform to the National Electrical Code as well as local codes andpractices. When other devices are coupled to the motor shaft, be sure to installprotective devices to prevent future accidents. Some protective devices include,coupling, belt guard, chain guard, shaft covers etc. These protect against accidentalcontact with moving parts. Machinery that is accessible to personnel should providefurther protection in the form of guard rails, screening, warning signs etc.

Location The motor should be installed in an area that is protected from direct sunlight, corrosives,harmful gases or liquids, dust, metallic particles, and vibration. Exposure to these canreduce the operating life and degrade performance. Be sure to allow clearance forventilation and access for cleaning, repair, service and inspections. Ventilation isextremely important. Be sure the area for ventilation is not obstructed. Obstructions willlimit the free passage of air. Motors get warm and the heat must be dissipated to preventdamage.These motors are not designed for atmospheric conditions that require explosion proofoperation. They must NOT be used in the presence of flammable or combustible vaporsor dust.

1. ODP motors are suitable only for indoor applications.�. TEFC motors are suitable for indoor or outdoor standard service applications.

Mounting The motor must be securely installed to a rigid foundation or mounting surface tominimize vibration and maintain alignment between the motor and shaft load. Failure toprovide a proper mounting surface may cause vibration, misalignment and bearingdamage.Foundation caps and sole plates are designed to act as spacers for the equipment theysupport. If these devices are used, be sure that they are evenly supported by thefoundation or mounting surface.After installation is complete and accurate alignment of the motor and load isaccomplished, the base should be grouted to the foundation to maintain this alignment.The standard motor base is designed for horizontal or vertical mounting. Adjustable orsliding rails are designed for horizontal mounting only. Consult your Baldor distributor orauthorized Baldor Service Center for further information.

Alignment Accurate alignment of the motor with the driven equipment is extremely important.1. Direct Coupling

For direct drive, use flexible couplings if possible. Consult the drive orequipment manufacturer for more information. Mechanical vibration androughness during operation may indicate poor alignment. Use dial indicators tocheck alignment. The space between coupling hubs should be maintained asrecommended by the coupling manufacturer.

�. End-Play AdjustmentThe axial position of the motor frame with respect to its load is also extremelyimportant. The motor bearings are not designed for excessive external axialthrust loads. Improper adjustment will cause failure.

�. Pulley RatioThe pulley ratio should not exceed �:1.

�. Belt DriveAlign sheaves carefully to minimize belt wear and axial bearing loads (seeEnd-Play Adjustment). Belt tension should be sufficient to prevent belt slippageat rated speed and load. However, belt slippage may occur during starting.

Caution: Do not over tension belts.

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�-� Installation & Operation MN�00

Doweling & Bolting After proper alignment is verified, dowel pins should be inserted through the motor feetinto the foundation. This will maintain the correct motor position should motor removal berequired. (Baldor motors are designed for doweling.)

1. Drill dowel holes in diagonally opposite motor feet in the locations provided.�. Drill corresponding holes in the foundation.�. Ream all holes.�. Install proper fitting dowels.�. Mounting bolts must be carefully tightened to prevent changes in alignment.

Use a flat washer and lock washer under each nut or bolt head to hold themotor feet secure. Flanged nuts or bolts may be used as an alternative towashers.

Power Connection Motor and control wiring, overload protection, disconnects, accessories and groundingshould conform to the National Electrical Code and local codes and practices.

Conduit Box For ease of making connections, an oversize conduit box is provided. The box can berotated ��0° in �0° increments. Auxiliary conduit boxes are provided on some motors foraccessories such as space heaters, RTD’s etc.

AC Power Connect the motor leads as shown on the connection diagram located on the name plateor inside the cover on the conduit box. Be sure the following guidelines are met:

1. AC power is within ±10% of rated voltage with rated frequency. (See motorname plate for ratings).OR

�. AC power is within ±�% of rated frequency with rated voltage. OR

�. A combined variation in voltage and frequency of ±10% (sum of absolutevalues) of rated values, provided the frequency variation does not exceed ±�%of rated frequency.

Performance within these voltage and frequency variations are shown in Figure �-1.

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Installation & Operation �-�MN�00

Figure 2-1 Motor Performance VS Voltage Variations+�0

+1�

+10

+�

0

–�

–10

–1�

–�0–1� –10 –� 0 +� +10 +1�

Voltage Variations (%)

Cha

nges

in M

otor

Per

form

ance

(%)

Full -LoadCurrent

Full -LoadCurrentPower

Factor

PowerFactor

Efficiency Efficiency

MaximumTorque

MaximumTorque

RepublicRBS 1�



�-� Installation & Operation MN�00

First Time Start Up Be sure that all power to motor and accessories is off. Be sure the motor shaft isdisconnected from the load and will not cause mechanical rotation of the motor shaft.

1. Make sure that the mechanical installation is secure. All bolts and nuts aretightened etc.

�. If motor has been in storage or idle for some time, check winding insulationintegrity with a Megger.

�. Inspect all electrical connections for proper termination, clearance, mechanicalstrength and electrical continuity.

�. Be sure all shipping materials and braces (if used) are removed from motorshaft.

�. Manually rotate the motor shaft to ensure that it rotates freely.�. Replace all panels and covers that were removed during installation.�. Momentarily apply power and check the direction of rotation of the motor shaft.�. If motor rotation is wrong, be sure power is off and change the motor lead

connections. Verify rotation direction before you continue.�. Start the motor and ensure operation is smooth without excessive vibration or

noise. If so, run the motor for 1 hour with no load connected.10. After 1 hour of operation, disconnect power and connect the load to the motor

shaft. Verify all coupling guards and protective devices are installed. Ensuremotor is properly ventilated.

Coupled Start Up This procedure assumes a coupled start up. Also, that the first time start up procedurewas successful.

1. Check the coupling and ensure that all guards and protective devices areinstalled.

�. Check that the coupling is properly aligned and not binding.�. The first coupled start up should be with no load. Apply power and verify that

the load is not transmitting excessive vibration back to the motor though thecoupling or the foundation. Vibration should be at an acceptable level.

�. Run for approximately 1 hour with the driven equipment in an unloadedcondition.

The equipment can now be loaded and operated within specified limits. Do not exceedthe name plate ratings for amperes for steady continuous loads.

Jogging and Repeated Starts Repeated starts and/or jogs of induction motors generally reduce the life of the motorwinding insulation. A much greater amount of heat is produced by each acceleration orjog than than by the same motor under full load. If it is necessary to to repeatedly start orjog the motor, it is advisable to check the application with your local Baldor distributor orBaldor Service Center.Heating - Duty rating and maximum ambient temperature are stated on the motor nameplate. Do not exceed these values. If there is any question regarding safe operation,contact your local Baldor distributor or Baldor Service Center.

RepublicRBS 1�


Section 3Maintenance & Troubleshooting

Maintenance & Troubleshooting �-1MN�00

WARNING: UL rated motors must only be serviced by authorized BaldorService Centers if these motors are to be returned to a flammableand/or explosive atmosphere.

General Inspection Inspect the motor at regular intervals, approximately every �00 hours of operation orevery � months, whichever occurs first. Keep the motor clean and the ventilationopenings clear. The following steps should be performed at each inspection:WARNING: Do not touch electrical connections before you first ensure that

power has been disconnected. Electrical shock can cause seriousor fatal injury. Only qualified personnel should attempt theinstallation, operation and maintenance of this equipment.

1. Check that the motor is clean. Check that the interior and exterior of the motoris free of dirt, oil, grease, water, etc. Oily vapor, paper pulp, textile lint, etc. canaccumulate and block motor ventilation. If the motor is not properly ventilated,overheating can occur and cause early motor failure.

�. Use a “Megger” periodically to ensure that the integrity of the winding insulationhas been maintained. Record the Megger readings. Immediately investigateany significant drop in insulation resistance.

�. Check all electrical connectors to be sure that they are tight.Lubrication & Bearings Bearing grease will lose its lubricating ability over time, not suddenly. The lubricating

ability of a grease (over time) depends primarily on the type of grease, the size of thebearing, the speed at which the bearing operates and the severity of the operatingconditions. Good results can be obtained if the following recommendations are used inyour maintenance program.

Type of Grease A high grade ball or roller bearing grease should be used. Recommended grease forstandard service conditions is Polyrex EM (Exxon Mobil).Equivalent and compatible greases include:Texaco Polystar, Rykon Premium #�, Pennzoil Pen � Lube and Chevron SRI.

– Maximum operating temperature for standard motors = 110° C.– Shut–down temperature in case of a malfunction = 11�° C.

Lubrication Intervals Recommended lubrication intervals are shown in Table �-1. It is important to realize thatthe recommended intervals of Table �-1 are based on average use.

Refer to additional information contained in Tables 3-2 and 3-3.Table 3-1 Lubrication Intervals *

Rated Speed - RPMNEMA / (IEC) Frame Size 10000 6000 3600 1800 1200 900

Up to �10 incl. (1��) ** ��00 Hrs. ��00 Hrs. 1�000 Hrs. 1�000 Hrs. ��000 Hrs.Over �10 to ��0 incl. (1�0) ��00 Hrs. ��00 Hrs. 1�000 Hrs. 1�000 Hrs.Over ��0 to ��0 incl. (��) * ��00 Hrs. ��00 Hrs. 1�000 Hrs. 1�000 Hrs.Over ��0 to ��00 incl. (�00) *��00 Hrs. ��00 Hrs. ��00 Hrs. 10�00 Hrs.

* Lubrication intervals are for ball bearings. For roller bearings, divide the listed lubrication interval by �.** For ��0� and ��0� bearings. For ��0� bearings, consult oil mist lubrication (MN�01).

Relubrication interval for ��0� bearing bearing is 1��0Hrs. (using grease lubrication).Relubrication interval for ��0� bearing bearing is ��0Hrs. (using grease lubrication).

RepublicRBS �0


�-� Maintenance & Troubleshooting MN�00

Table 3-2 Service ConditionsSeverity of Service Ambient Temperature

MaximumAtmospheric

ContaminationType of Bearing

Standard �0° C Clean, Little Corrosion Deep Groove Ball BearingSevere �0° C Moderate dirt, Corrosion Ball Thrust, RollerExtreme >�0° C* or

Class H InsulationSevere dirt, Abrasive dust,

CorrosionAll Bearings

Low Temperature <–�0° C **

* Special high temperature grease is recommended (Dow Corning DC��). Note that Dow Corning DC�� grease doesnot mix with other grease types. Thoroughly clean bearing & cavity before adding grease.

** Special low temperature grease is recommended (Aeroshell �).Table 3-3 Lubrication Interval MultiplierSeverity of Service Multiplier

Standard 1.0Severe 0.�Extreme 0.1

Low Temperature 1.0

Table 3-4 Bearings Sizes and Types

Frame SizeNEMA (IEC)

Bearing Description(These are the “Large” bearings (Shaft End) in each frame size)

Bearing ODD mm

WidthB mm

Weight ofGrease to

Volume of greaseto be added

add *oz (Grams)

in3 tea-spoon

Up to �10 incl. (1��) ��0� �0 �1 0.�0 (�.� ) 0.� �.0Over �10 to ��0 incl. (1�0) ��11 1�0 �� 0.�1 (1� ) 1.� �.�Over ��0 to ��0 incl. (��) ��1� 1�0 �� 0.�1 (�� ) 1.� �.�Over ��0 to �� incl. (��0) NU�1� �00 �� .1� (�0) �.1 1�.�

Over �000 to ��00 incl. (��) NU�� 00 �� .�0 (1�0) �.� �0.0Spindle Motors

�� Frame ��0� �� 1� 0.�� (�.1) 0.�� 1.�� Frame ��10 �0 �0 0.�� (�.0) 0.�� .1�0 Frame ��1� 1�0 �� 0.�� (1�.0) 0.�� .�

* Weight in grams = .00� DB

RepublicRBS �1


Maintenance & Troubleshooting �-�MN�00

Lubrication Procedure Be sure that the grease you are adding to the motor is compatible with the grease alreadyin the motor. Consult your Baldor distributor or an authorized service center if a greaseother than the recommended type is to be used.Caution: To avoid damage to motor bearings, grease must be kept free of dirt.

For an extremely dirty environment, contact your Baldor distributor oran authorized Baldor Service Center for additional information.

With Grease Outlet Plug1. Clean all grease fittings.�. Remove grease outlet plug.�. If motor is stopped, add the recommended amount of grease.

If motor is to be greased while running, a slightly greater quantity of grease willhave to be added. Add grease slowly until new grease appears at shaft hole inthe endplate or purge outlet plug.

�. Re-install grease outlet plug.Without Grease Outlet Plug

1. Disassemble motor.�. Add recommended amount of grease to bearing and bearing cavity. (Bearing

should be about 1/� full of grease and outboard bearing cavity should be about1/� full of grease.)

Note: Bearing is 1/� full when only one side of bearing is completely full of grease.

�. Assemble motor.Sample Lubrication Determination

Assume - NEMA ��T (IEC 1�0), 1��0 RPM motor driving an exhaust fan in an ambienttemperature of ��° C and the atmosphere is moderately corrosive.

1. Table �-1 list ��00 hours for standard conditions.�. Table �-� classifies severity of service as “Severe”.�. Table �-� lists a multiplier value of 0.� for Severe conditions.�. Table �-� shows that 1.� in� or �.� teaspoon of grease is to be added.Note: Smaller bearings in size category may require reduced amounts of grease.

RepublicRBS ��



�-� Maintenance & Troubleshooting MN�00

Accessories The following is a partial list of accessories available from Baldor. Contact your Baldor distributor for availability and pricing information.

Note: Space heaters and RTD’s are standard on some motors.

Bearing RTDRTD (Resistance Temperature Detector) devices are used to measure ormonitor the temperature of the motor bearing during operation.

Bearing ThermocouplesUsed to measure or monitor bearing temperatures.

Bearing ThermostatTemperature device that activates when bearing temperatures are excessive.Used with an external circuit to warn of excessive bearing temperature or toshut down a motor.

Conduit BoxesOptional conduit boxes are available in various sizes to accommodateaccessory devices.

Cord & Plug AssemblyAdds a line cord and plug for portable applications.

Drains and BreathersStainless steel drains with separate breathers are available.

Drip CoversDesigned for use when motor is mounted in a vertical position. Contact yourBaldor distributor to confirm that the motor is designed for vertical mounting.

Fan Cover & Lint ScreenTo prevent build-up of debris on the cooling fan.

NameplateAdditional stainless steel nameplates are available.

Roller BearingsRecommended for belt drive applications with a speed of 1�00 RPM or less.

Rotation Arrow LabelsRotation arrows are supplied on motors designed to operate in one directiononly. Additional rotation arrows are available.

Space HeaterAdded to prevent condensation of moisture within the motor enclosure duringperiods of shut down or storage.

Stainless HardwareStainless steel hardware is available. Standard hardware is corrosion resistantzinc plated steel.

Winding RTDRTD (Resistance Temperature Detector) devices are used to measure ormonitor the temperature of the motor winding during operation.

Winding ThermocouplesUsed to measure or monitor winding temperatures.

Winding ThermostatTemperature device that activates when winding temperatures are excessive.Used with an external circuit to warn of excessive winding temperature or toshut down a motor.

Note: On some motors, leads for accessory devices are brought out to a separateconduit box located on the side of the motor housing (unless otherwisespecified).

RepublicRBS ��



Maintenance & Troubleshooting �-�MN�00

Table 3-5 Troubleshooting Chart

Symptom Possible Causes Possible SolutionsMotor will not start Usually caused by line trouble, such

as, single phasing at the starter.Check source of power. Check overloads, fuses,controls, etc.

Excessive humming High Voltage. Check input line connections.Eccentric air gap. Have motor serviced at local Baldor service center.

Motor Over Heating Overload. Compare actual amps(measured) with nameplate rating.

Locate and remove source of excessive friction inmotor or load.Reduce load or replace with motor of greater capacity.

Single Phasing. Check current at all phases (should be approximatelyequal) to isolate and correct the problem.

Improper ventilation. Check external cooling fan to be sure air is movingproperly across cooling fins.Excessive dirt build-up on motor. Clean motor.

Unbalanced voltage. Check voltage at all phases (should be approximatelyequal) to isolate and correct the problem.

Rotor rubbing on stator. Check air gap clearance and bearings.Tighten “Thru Bolts”.

Over voltage or under voltage. Check input voltage at each phase to motor.Open stator winding. Check stator resistance at all three phases for balance.Grounded winding. Perform dielectric test and repair as required.Improper connections. Inspect all electrical connections for proper

termination, clearance, mechanical strength andelectrical continuity. Refer to motor lead connectiondiagram.

Bearing Over Heating Misalignment. Check and align motor and driven equipment.Excessive belt tension. Reduce belt tension to proper point for load.Excessive end thrust. Reduce the end thrust from driven machine.Excessive grease in bearing. Remove grease until cavity is approximately �/� filled.Insufficient grease in bearing. Add grease until cavity is approximately �/� filled.Dirt in bearing. Clean bearing cavity and bearing. Repack with correct

grease until cavity is approximately �/� filled.Vibration Misalignment. Check and align motor and driven equipment.

Rubbing between rotating parts andstationary parts.

Isolate and eliminate cause of rubbing.

Rotor out of balance. Have rotor balance checked are repaired at yourBaldor Service Center.

Resonance. Tune system or contact your Baldor Service Center forassistance.

Noise Foreign material in air gap orventilation openings.

Remove rotor and foreign material. Reinstall rotor.Check insulation integrity. Clean ventilation openings.

Growling or whining Bad bearing. Replace bearing. Clean all grease from cavity and newbearing. Repack with correct grease until cavity isapproximately �/� filled.

RepublicRBS ��


RepublicRBS �0


RepublicRBS �1


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RepublicRBS ��


Motor Wiring and Start-Up Only qualified personnel should perform wiring or maintenance on the blower assembly

Never run a centrifugal blower to atmosphere, as this can cause overloading and damage the motor. Always check your installation to make sure the motor is running within the motor manufacturers specified amp ranges.

Republic blowers are shipped with the belts removed. Motor rotation must be checked prior to installing the belt! Running the blower/motor assembly backwards will cause improper performance and damage the blower.

With the belt removed, “bump” the power to determine rotation of motor.

The blower should be rotating clockwise (CW) from the belt side of the blower, counter-clockwise (CCW) if you are on the motor side or impeller side of the blower. Rotation arrows on the blower cast housing (Motor Side) show correct rotation of impeller rotation. If the motor is going the wrong direction, then have your qualified electrician change the direction of rotation.

If the blower is allowed to run in the wrong direction, you could cause damage to the idler pulley assembly spring or belt. Even in reverse, a centrifugal blower will still provide a substantial amount of airflow and pressure, but it will not perform to your satisfaction.

RepublicRBS ��


Insert install tool into motor pulley as shown in Figure 1.Slip belt over motor pulley. Slide belt over blower pulley. Rotate motor pulley with install tool and apply pressure on belt to work belt over belt grooves. Work belt until belt groves and pully grooves align. Use a wire tie or plastic zip tie to attach the belt to the motor pulley if needed.

RepublicRBS �0


Motor Pulley Information

When installing a new motor pulley or servicing your existing unit, make sure that the outer grooves on both the motor pulley and blower pulley are not damaged, nicked or dinged.

Damaged pulley grooves can cause premature belt failures or higher than normal levels of vibration.

Be sure to use a Torque wrench when installing the Motor Pulley.

Torque the set screws to 36 ft./lbs. or 430 in./lbs.

Torque the set screws evenly to ensure proper alignment.

Blower Pulley

Motor

Taper-Lock Bushing

Set Screws

Motor Pulley Face

Blower Pulley Face

1/2-13 Hex Head Screw 4 Pls

RepublicRBS �1


Straight Edge

0” TO ± 1/32”

Straight Edge

Middle Hole is for Removal

Mounting Plate

Additional two (2) holes are for installation

Motor Pulley Installation Procedure:

1. Install Bushing into Motor Pulley with set screws. Then install the Motor Pulley Assembly onto the motor’s shaft.

2. Use a straight edge to align the Motor Pulley Face with the Blower Pulley Face. Alignment must be within 0” to ± 1/32”. The straight edge must be able to rotate radially and lay flush on two faces of the motor pulley while lying flush on the face of the blower pulley to insure proper alignment (see Detail C).

3. Insert a screw driver through one of the Motor Pulley’s and Mounting Plate’s holes to keep the Motor Pulley from rotating while tightening the set screws.

4. Using a Torque wrench, set the torque to 36 ft./lbs.. and then torque the set screws equally.

Motor Pulley Installation MtrPullInstall

Motor Pulley Installation

Radially Rotate the Straight Edge to

Align Blower Pulley

Detail C

RepublicRBS ��


Blower Pulley

Motor

Taper-Lock Bushing

Set Screws

Motor Pulley Face Blower Pulley Face

1/2-13 Hex Head Screw 4 Pls

Motor Pulley Removal Procedure:

1. Line up one Motor Pulley Hole to Mounting Plate Hole and insert a screw driver through, restricting the Motor Pulley rotation.

2. Use a 1/4” Allen wrench and remove the two (2) set screws from the Motor Pulley and Bushing.

3. Insert one of the removed set screws into the top Middle Hole of the Bushing.

4. While still keeping the Motor Pulley from rotating, tighten the Middle Hole set screw until the Motor Pulley separates from the Bushing.

5. When the Motor Pulley is loose, slide it off the motor shaft.

6. Be careful not the drop the Motor Pulley and damage the grooves.

Motor Pulley Removal MtrPulRemoval

Middle Hole in Bushing is for Removal

Set Screw Installation Holes

Motor Pulley Removal

Mounting Plate

Mounting Plate Hole

Detail A

RepublicRBS ��


Blower Head Rotation BLWRHDROTA

Blower Housing can rotate cw or ccw as shown in these views.

Blower HousingBand Clamp Loop

1” Loop to Loop Band Clamp

Hex Nut

Detail A

Blower Housing Rotational Procedures:1. Loosen Hex Nut on Band Clamp using 3/8” nut driver.

2. Rotate Blower Housing to desired position, then hand tighten Hex Nut until Band Clamp Loops are 1” apart.

RepublicRBS ��


Mounting Plate Position MTPLPOS

Position No. 5 is standard unless otherwise specified by customer.

1

2

34

5

6

78

9

10

11 12

13 14

15

16

1718

RepublicRBS ��


RB500 Blower Assy. w/3HP Motor 200-5003

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RB500 Blower Assy. w/5HP Motor 200-5005

RepublicRBS ��


RB500 Blower Assy. w/7.5HP Motor 200-5075

RepublicRBS ��


RB500 Blower Assy. - 90 IEC Frame 200-5090

RepublicRBS ��


RB500 Blower Assy. - 100 IEC Frame 200-5100

RepublicRBS �0


RB500 Filter Assembly 250-0920

RepublicRBS �1


Trouble Shooting GuidelinesLow Flow, Pressure or Vacuum

Blower is rotating backwards

(Check the motor wiring)

Dirty or contaminated filter

Collapsed flex hose or piping Replace hose or piping

Worn or damage Impeller Replace Impeller

Worn belt (slipping) Replace belt

Butterfly valve is closed Open Butterfly and check amperage

Piping design too small for the application

Call Republic Blower Systems or Local Distributor

Improper blower application Call Republic Blower Systems or Local Distributor

Air leakage Check all connections

Electrical Overloading

Exceeding the designed CFM of the blower motor

Blower RPM too high

Damaged motor bearing or winding

Electrical supply problems

Blower not connected to air knives or pipe

Irregular Noise Blockage in the air lines or piping

Leakage in the pipes, cracked or loose flex hose

Frayed or a bad belt Replace belt

Bolts loose on the motor mounts

Blower bearings are worn Bearing Housing Assy.

Motor bearings worn or motor fan is rubbing

Blower is receiving vibration from other equipment in the vicinity

Belt Slipping Worn belt Replace belt

Belt Tension Spring worn-out/missing Replace belt

Belt is contaminated due to the environment Clean or replace belt

RepublicRBS ��


Pulley grooves worn, check both pulleys Replace pulley(s)

Dirt, dust or debris pulled inside the belt guard area Clean area

Incorrect belt size

Low belt tension Replace belt

Residue build-up on pulley(s) Clean pulley(s) with a brass brush

Dirty contaminated filter Replace filter

Bearings seized Replace Bearing Housing

Foreign material preventing Bearing Housing from rotating freely Clean Bearing Housing and Impeller

Belt Fraying Foreign material rubbing on belt Remove foreign material, change belt

Belt is not seated correctly on pulleys and overlapping edges Align belt correctly, change belt

Worn belt Replace belt

Trouble Shooting Guidelines (cont.)

Belt is Jumping or Disintegrating

Motor Pulley out of alignment See alignment guidelines

Worn belt Replace belt

Belt Tension Spring worn-out/missing Replace belt

Pulley grooves worn, check both pulleys Replace pulley(s)

Belt is contaminated Clean or replace belt

Low belt tension Check tension setting

Residue build-up on pulley(s) Clean pulley(s) with a brass brush

Bearings seized Replace Bearing Housing

Foreign material preventing Bearing Housing from rotating freely Clean Bearing Housing and Impeller

Frequent motor starting and stopping Attach soft start

RepublicRBS ��


Republic Blower Systems Warranty Terms and ConditionsRepublic Sales & Manufacturing Company warrants all finished Republic Blower Systems products to be free from functional defects in material and workmanship for a period of twelve (12) months from the date of installation, or no longer than eighteen (18) months from shipment.

Wear parts such as drive belts, filter elements, hoses and pulleys are not covered by the 12 to 18 month warranty.

DISASSEMBLY OF BLOWER MAY VOID WARRANTY.

To obtain service within the warranty period, first contact your authorized Republic Sales and Manufacturing dealer or Republic Sales and Manufacturing Service Department. Republic’s responsibility under this warranty shall be to provide an analysis of the blower, which will determine course of action. Any product found to be defective within the warranty period will merit either:

a. A no charge repair of existing blower. Any freight charges will be the purchaser’s responsibility.

b. A replacement blower*. Any freight charges will be the purchaser’s responsibility.*This option would be chargeable replacement until the original blower is received by Republic Sales & Manufacturing, and warranty is approved.

Republic Sales & Manufacturing shall not be liable for incidental nor consequential damages resulting from the use of this product. There are no expressed nor implied warranties, which extend beyond the warranty of merchantability or fitness for a particular purpose to the equipment and/or its parts and components.


5131 Cash RoadDallas, TX 75247P. 214.631.8070F. 214.631.3673

www.republicsales.com

www.republicsales.com Created 12.05

280-0500 © 2005 Republic Sales & Manufacturing®

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