Installation & Maintenance Instructions
Contents
1. 3 4 ELECTRICAL CONNECTIONS A WARNING ELECTRICAL HAZARDS Before proceeding read Section 1 1 on Electrical Safety Failure to follow the instructions in Section 1 1 could result in serious personal injury death and or property damage WARNING ELECTRICAL SHOCK HAZARD Voltage may be present at the motor terminals even after the motor has stopped rotating To assure there is no voltage at motor remove input power from VFD and follow VFD manufacture documentation for voltage decay time before servicing motor Failure to follow this instruction could result in serious personal injury or death NOTICE MOTOR NOT SUITED FOR OPERATION ON LINE POWER Permanent magnet motors can only be properly operated by a variable frequency drive VFD Attempting to run in bypass mode across the line may cause motor damage 3 4 1 POWER SUPPLY BRANCH CIRCUIT A WARNING POWER SUPPLY INCOMPATIBILITY HAZARD Check power supply to make certain that voltage frequency and current carrying capacity are in accordance with the motor nameplate and VFD Connecting the VFD to the wrong power source could result in serious personal injury death and or property damage WARNING BRANCH CIRCUIT SUPPLY HAZARD Motor and control wiring fusing overload protection disconnects accessories and grounding must always conform to the applicable electrical codes as well as local codes and sound practices 3 4 1 1 Fuses Breakers Overload Relays Consult variable fre2. 2 Terminal Box 3 4 2 1 Conduit opening 3 4 3 Lead Connections 3 4 4 Ground Connections 3 4 4 1 Electrical Interference 3 4 5 Start Up 3 4 5 1 Start Up No Load Procedure 3 4 5 2 Start Up Load Connected Procedure 4 0 MAINTENANCE 4 1 General Inspection 4 1 1 Ventilation 4 1 2 Insulation 4 1 3 Electrical Connections 4 1 4 Seal Condition 4 1 5 Safety Labels 4 2 Lubrication and Bearings 4 2 1 Grease Type 4 2 2 Bearing Operating Temperature 4 2 3 Lubrication Interval 4 2 4 Lubrication Procedure 4 2 5 Lubrication Example 4 3 Trouble Shooting 4 3 1 General Trouble Shooting Warnings 1 0 SAFETY INFORMATION 1 1 ELECTRICAL SAFETY A WARNING ELECTRICAL SHOCK HAZARD Electrical connections shall be made by a qualified electrician in accordance with all applicable codes ordinances and sound practices Failure to follow these instructions could result in serious personal injury death and or property damage Only qualified personnel who are familiar with the applicable National Code USA NEC and local codes should install or repair electrical motors and their accessories WARNING ELECTRICAL HAZARD Failure to connect motor and variable frequency drive in accordance with the drive manufacturer s documentation may result in serious injury death and or property damage WARNING ELECTRICAL LIVE CIRCUIT HAZARD Do not touch electrically live parts Disconnect lockout and tag input power supply before installing or servicing m
3. loads see section 3 3 4 Table 3 2 Maximum Radial Load pounds force Middle of the Shaft Extension Length Pe Motor Rated RPM 3600 1800 1200 900 Values based on 26 280 hrs B 10 Life For End of Shaft Load multiply value by 0 88 3 3 4 BELTED The goal of any belted system is to efficiently transmit the required torque while minimizing the loads on the bearings and shafts of the motor and driven equipment This can be accomplished by following four basic guidelines 1 Use the largest practical sheave diameter 2 Use the fewest number of belts possible 3 Keep sheaves as close as possible to support bearings 4 Tension the belts to the lowest tension that will still transmit the required torque without slipping V belts may squeal initially in high starting torque applications 3 3 4 1 Sheave Diameter Guidelines In general smaller sheaves produce greater shaft stress and shaft deflection due to increased belt tension See Table 3 3 next page for recommended minimum sheave diameters Using larger sheaves increases the contact with belts which reduces the number of belts required It also increases the belt speed resulting in higher system efficiencies When selecting sheaves do not exceed the belt manufacturer s recommended maximum belt speed typically 6 500 feet per minute for cast iron sheaves Determine belt speed by the following formula Figure 1 Avoid Desired Sha
4. primary ground and the variable frequency drive ground Primary Internal Ground A grounding conductor must be connected to the grounding terminal provided in the terminal housing This grounding terminal is either a ground screw ground lug or a tapped hole to be used with a separately provided ground screw The internal grounding feature is accessible inside the terminal housing and must be used as the primary grounding connection Secondary External Ground Some motors are provided with a supplemental grounding terminal located on the external surface of the motor frame or feet This external terminal is for supplemental grounding connections where local codes permit or require such connection 3 4 5 START UP A WARNING LOOSE amp ROTATING PARTS HAZARD Before proceeding read Section 1 2 on Mechanical Safety Failure to follow the instructions could result in serious personal injury death and or property damage WARNING ELECTRICAL LIVE CIRCUIT HAZARD Shaft rotation produces voltage in PM motors even when motor is disconnected from power source Do not open terminal box or touch unprotected terminals while the motor shaft is rotating Failure to do so may cause serious injury or death to personnel WARNING ELECTRICAL SHOCK HAZARD Be certain that all connections are secure and the conduit box cover is fastened in place before electrical power is applied Failure to follow these instructions could result in serious perso
5. source Do not open terminal box or touch unprotected terminals while the motor shaft is rotating Failure to do so may cause serious injury or death to personnel WARNING ELECTRICAL SAFETY Refer to Section 1 0 for additional warnings before proceeding with installation and operation 3 1 LOCATION 3 1 1 SELECTING A LOCATION Consideration should be given to environment and ventilation Motors should be installed in an area that is protected from direct sunlight corrosives harmful gases or liquids dust metallic particles and vibration A motor with the proper enclosure for the expected operating condition should be selected Provide accessible clearance for cleaning repair service and inspections See section 3 1 3 for construction clearances The location should be considered for possible future motor removal or motor handling The free flow of air around the motor should not be obstructed 3 1 2 AMBIENT TEMPERATURE LIMITS The ambient temperatures of the air inlet to the motor should not exceed 40 104 F or be less than 30 22F unless the mo tor nameplate specifically states an ambient temperature outside of these limits The ambient inside an enclosure built around the motor shall not exceed the nameplate ambient For ambient temperatures outside of these limits consult the motor manufacturer NOTICE INSULATION DEGRADATION WARNING Insulation at high temperatures ages at an accelerated rate Each 10 increase in t
6. 40 C 104 F to 50 Moderate dirt or Corrosion or outdoors or more than 16 hrs C per day 0 5 Greater than 50 C or A Extreme Class H Insulation Severe dirt or Abrasive dust or Corrosion 0 2 Table 4 3 Construction Multiplier Construction Multiplier Angular Contact or Roller Bearing 0 5 Vertical Motor 0 5 All others 1 0 Table 4 4 Relubrication Amounts Frame Size Volume NEMA IEC Cu In Fluid oz ml 180 110 0 50 0 28 8 0 210 130 0 75 0 42 12 5 250 160 1 00 0 55 16 0 280 180 1 50 0 83 25 0 For regreasing while operating multiply volume by 125 4 2 4 LUBRICATION PROCEDURE For Motors with Regreasing Provisions NOTICE BEARING DAMAGE WARNING Added grease must be compatible with the original equipment s grease If a grease other than those stated in 4 2 1 is to be utilized contact the motor manufacturer Nameplate information supersedes section 4 2 1 GREASE TYPE New grease must be free of dirt Failure to follow these instructions and procedure below may result in bearing and or motor damage NOTICE GREASE DRAIN PLUGGED Old grease may completely block the drain opening and must be mechanically removed prior to regreasing Forcing a blocked drain open by increased greasing pressure may collapse bearing shields and or force excess grease through the bearings and into the motor For an extremely dirty environment contact the moto
7. ION HAZARD A motor should never be placed in an area with a hazardous process or where flammable gases or combustible materials may be present unless it is specifically designed and nameplated for this type of service Hazardous Locations motors are intended for installations in accordance with NEC Article 500 For all installations involving Hazardous Locations motors consult the NEC local codes and the authority having jurisdiction Failure to follow these instructions could result in serious personal injury death and or property damage For other limitations see section 1 3 3 2 MOUNTING MOTOR 3 2 1 RIGID BASE FOOTED The motor must be securely installed to a rigid foundation or a mounting surface to minimize vibration and maintain alignment between the motor shaft and the load s shaft The mounting surfaces of the four mounting pads must be flat within 0 01 inches for 210 frame amp smaller 0 015 inches for 250 frame amp larger IEC 0 25 mm for 130 frame amp smaller 0 38 mm for 160 frame amp larger This may be accomplished by shims under the motor feet For special isolation mounting contact manufacturer for assistance 3 2 2 RIGID BASE HOLE SELECTION 6 OR 8 HOLES Location 1 and 3 holes for short frame Be ig NEMA 182 213 254 284 IEC 112S 132S 160M 180M Bottom View Of Motor 1 H OQ 1 q Location 1 and 4 holes for long frames NEMA 184 215 256 286 3 2 3 VERTICAL MOUNTI
8. Installation Operation and Maintenance Instructions NEMA 182T 286T IEC 112 180 Permanent Magnet Motors Operated On Variable Frequency Drives VFD www leeson com INSTALLER PLEASE LEAVE THIS MANUAL FOR THE OWNER S USE OWNER READ AND SAVE THESE INSTRUCTIONS SAFETY INSTRUCTIONS A This is the safety alert symbol It is used to alert you to potential personal injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death A WARNING Warning indicates a potentially hazardous situation which if not avoided could result in death or serious injury A CAUTION Caution indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury NOTICE Notice indicates a situation not related to personal injury which if not avoided may result in motor or equipment damage A Before installing using or servicing this product carefully read and fully understand the instructions including all warnings cautions amp safety notice statements To reduce risk of personal injury death and or property damage follow all instructions for proper motor installation operation and maintenance Although you should read and follow these instructions they are not intended as a complete listing of all details for installation operation and maintenance If you have any questions concerning any of the procedures or if you have a safety concern not covered by the instr
9. NG Location 2 holes are for F1 F2 Conversion if provide IEC 112M 132M 160L 180L A WARNING FALLING OBJECT HAZARD The lifting provision on standard horizontal footed motors is not designed for lifting the motor in a vertical shaft up or shaft down position see Diagram 2 2 1 Doing so may cause the motor to fall Lifting method provisions for mounting a rigid base footed motor vertically is the responsibility of the installer 3 3 VERTICAL SHAFT DOWN Most standard horizontal motors through 449 Fr excluding brake motors can be mounted in a vertical shaft down orientation For vertical brake motors see section 3 3 6 2 VERTICAL SHAFT UP A WARNING HAZARDOUS LOCATIONS VERTICAL MOUNT Hazardous locations motors must NOT be mounted vertically shaft up without approval by the motor manufacturer Without proper retaining provisions the rotor may move axially and contact components creating a spark hazard Belted or Radial Load when mounted vertically The following frame sizes constructions with applied axial down loads within the limit stated are acceptable when mounted vertical shaft up Table 3 1 Belted or Radial Load Applications All speeds Max oe Enclosure Construction alta gang Load2 180 TEFC All Yes 35 Ibs 210 TEFC All Yes 40 Ibs 250 TEFC All Yes 40 Ibs 280 TEFC Cast Iron Yes 30 Ibs Notes The max applied down load is any applied l
10. OWER Permanent magnet PM motors can only be operated by a PM motor compatible VFD Variable Frequency Drive Connecting directly to line power may result in motor damage 1 2 MECHANICAL SAFETY A WARNING LOOSE PARTS HAZARD Before starting the motor remove all unused shaft keys and loose rotating parts to prevent them from flying off Failure to follow these instructions could result in serious personal injury death and or property damage WARNING ROTATING PARTS HAZARD Keep extremities hair jewelry and clothing away from moving parts Failure to follow these instructions could result in serious personal injury death and or property damage See section 3 3 7 WARNING DO NOT DISASSEMBLE Due to powerful magnetic fields disassembly and assembly of permanent magnet motors should only be performed by the manufacturer or specialized personnel authorized by the manufacturer Only qualified personnel who are familiar with the applicable national codes local codes and sound practices should install or repair electric motors and their accessories See the Magnetic Field Hazard in section 1 1 1 3 ENVIRONMENTAL SAFETY A WARNING HAZARDOUS LOCATIONS The NEC and the local authority having jurisdiction must be consulted concerning the installation and suitability of motors for use in Hazardous Locations in accordance with NEC Article 500 The local authority having jurisdiction must make the final determination of what type of motor i
11. aintenance GENERAL INSPECTION Inspect the motor approximately every 500 hours of operation or every three months whichever occurs first Keep the motor clean and the ventilation and fin openings clear The following steps should be performed at each inspection 4 1 1 VENTILATION Check that the ventilation openings and or exterior of the motor are free of dirt oil grease water etc which can accumulate and block motor ventilation If the motor is not properly ventilated overheating can occur and cause early motor failure 4 1 2 INSULATION To monitor motor insulation disconnect motor from the VFD and use a Megger to take periodic readings Record the Megger readings If winding resistance to ground is less than 1 5 Meg ohms consult the local authorized service shop before re energizing the motor 4 1 3 ELECTRICAL CONNECTIONS With all power off and motor stopped check all electrical connectors to be sure that they are tight 4 1 4 SEAL CONDITION When supplied check the condition of shaft seals and replace if necessary 4 1 5 SAFETY LABELS Do not remove or cover safety labels Inspect and clean safety labels to maintain visibility Replace labels if they are no longer readable 4 2 LUBRICATION amp BEARINGS The lubricating ability of grease over time depends primarily on the type of grease the size of the bearing the speed at which the bearing operates and the severity of the operating conditions Longer bearin
12. al operation Touching this surface may cause discomfort or injury Surface temperatures should only be measured with suitable instruments and not estimated by hand touch For RTD settings see Table 3 7 4 2 3 LUBRICATION INTERVALS For motors with regreasing provisions Eq 4 2 Lubrication Interval Table 4 1 hrs x Interval Multiplier Table 4 2 x Construction Multiplier Table 4 3 Recommended lubrication intervals are shown in Table 4 1 These values are based on average use Table 4 1 Lubrication Intervals Operating Speed RPM See Table 3 4 for Maximum Operating Speed NEMA IEC Frame Size lt 7200 lt 5400 lt 4500 lt 3600 lt 1800 lt 1200 180 110 2500 Hrs 4000 Hrs 5000 Hrs 6000 Hrs 17000 Hrs 20000 Hrs 210 250 130 160 2500 Hrs 4000 Hrs 5000 Hrs 12000 Hrs 16000 Hrs 280 180 2000 Hrs 3000 Hrs 4000 Hrs 10000 Hrs 14000 Hrs Seasonal Service If motor remains idle for more than six months Lubricate at the beginning of the season then follow lubrication interval Do not exceed maximum safe operating speed without manufacturer s approval Table 4 2 Service Conditions Use highest level Multiplier Maximum Ambient Temperature and Contamination are independent factors ey ot Maxin m AMENI Atmospheric Contamination Multiplier Service Temperature Standard Less than 40 C 104 F Clean Slight Co rrosion indoors less than 16 hrs per day 1 0 Severe Above
13. art 5 Check fault codes on VFD and follow VFD troubleshooting procedures Ref Section Drive has faulted 335 1 Check fuse or reset circuit breaker Ref Section 3 4 1 1 Supply voltage to VFD has drooped or has 2 Verify that rated and balanced supply voltage has been restored at VFD input before become severely unbalanced restarting motor Measure VFD input voltage after motor has reached set speed during restart Ref Section 3 4 1 2 Cc Motor is overloaded VFD trips on overload 1 Verify that motor amp load turn freely Ref Sections 3 3 5 and 3 4 5 Niclor beaiits 7 J Disconnect motor from load amp ensure motor turns freely Ref Section 3 4 5 Olor DeaArngS Are Seize Verify that motor starts when disconnected from load Ref Section 3 4 5 Remove excessive binding load if present Load Is jammed VFD trips on overload Motor may have overheated Check thermostats and if tripped allow motor to cool Check fault codes on VFD and follow VFD troubleshooting procedures VFD will not restart motor after tripping Verify that VFD input voltage is balanced and within limits Ref Section 3 4 1 3 Remove excessive mechanical load if present To diagnose motor must be cooled to room temperature Disconnect motor shaft from load and motor leads from VFD Ref Section 4 0 Connect AC volt meter across T1 and T2 motor leads Drive motor at a speed below rated speed and measure both voltage generated and actual RPM The voltage per 1000
14. ction diagram or separate connection plate In making connections follow the applicable electrical code as well as local codes and practices WARNING ELECTRICAL CONNECTION HAZARD Failure to correctly connect the motor leads and grounding conductor can result in serious personal injury or death Motor lead connections can short and cause damage or injury if not well secured and insulated 3 4 4 GROUND CONNECTION S A WARNING ELECTRICAL GROUNDING HAZARD For general information on grounding USA refer to NEC Article 250 Improper grounding of an inverter fed motor may result in frame voltages in excess of 500 Volts In making the ground connection the installer must make certain that a good electrical connection is obtained between motor and grounding lead Failure to properly ground motors per the applicable national code such as NEC Article 430 and local codes may cause serious injury or death to personnel Equalize ground potential between the motor and driven equipment if the driven equipment and motor are not mounted to the same metallic base plate 3 4 4 1 Electrical Interference Due to high switching frequencies of variable frequency drives use a low resistance ground cable that is low impedance at high frequencies A shielded motor power cable with a complete circumferential braided or copper film ground jacket around the power leads is recommended to minimize electrical interference Secure this ground to both the motor s
15. emperature reduces the insulation life by one half 3 1 3 CONSTRUCTION SELECTION PER LOCATION 3 1 3 1 TOTALLY ENCLOSED MOTORS are suitable for indoor or outdoor standard service applications Severe duty construction is recommended for severe service applications TEAO or AOM Totally Enclosed Air Over motors must be mounted in the air stream When the motor nameplate states a minimum airflow the motor must be mounted in an air stream meeting this minimum value TEFC Totally Enclosed Fan Cooled motors must meet a minimum distance equal to 2 the shaft height between the fan guard grill openings and the nearest obstruction 3 1 3 2 HAZARDOUS LOCATIONS MOTORS Not all motors covered by this manual are intended for hazardous duty locations Motors intended for hazardous duty locations are labeled with the division and class WARNING HAZARDOUS LOCATIONS Hazardous Locations motors are intended for installations in accordance with NEC Article 500 For all installations involving Hazardous Locations motors consult the applicable national codes local codes and the authority having jurisdiction Failure to do so may cause serious injury or death to personnel Division 2 Installations Class only Use only motors that are CSA Certified and bear the CSA Certification Mark These motors include a phrase on the main motor nameplate that indicates the motor is CSA Certified for Class Division 2 Zone 2 locations WARNING EXPLOS
16. ese over temperature devices when provided will void the motor warranty THERMISTERS OR RESISTANCE TEMPERATURE DETECTORS RTDs These sensors are to be connected to a solid state resistance monitoring device designed for use with thermistors or RTDs Failure to connect these over temperature devices when provided will void the motor warranty 3 3 6 5 RTD Alarm amp Trip Settings Tables 3 6 amp 3 7 are suggested initial RTD alarm and trip settings For motors found to operate significantly below these values the settings may be reduced accordingly Table 3 6 Winding RTD Temperature Limit 8C 40 8C Max Ambient Temperature degrees C Alarm Trip 130 140 Table 3 7 Bearing RTD Temperature Limit 8C 40 8C Max Ambient Bearing Type Standard bearings Motors specified with heat stabilized bearings to 150 C 3 3 7 GUARDS A WARNING ROTATING PARTS HAZARD When devices are assembled to the motor shaft be sure to install protective devices such as belt guards chain guards and shaft covers These devices must protect against accidental contact with extremities hair and clothing Consider the application and provide guarding to protect personnel Remove all unused shaft keys and loose rotating parts to prevent them from flying off and causing bodily injury Failure to follow this warning could result in serious personal injury death and or property damage
17. ft RPM x 3 14 x Sheave Dia inches BELT SPEED Ft min 12 3 3 4 2 Number of Belts In general use the fewest number of belts that will transmit the required torque without slipping See Table 3 3 next page for recommended maximum number of belts Each belt adds to the tension in the system which increases load on the shafts and bearings Belts are most efficient when operated at or near their rated horsepower If the sheaves have more grooves than the number of belts required use the grooves closest to the motor 3 3 4 3 Sheave Location Install sheaves as close to the housing as possible to increase the bearing life of the motor and driven equipment Figure 2 Avoid Desired 3 3 4 4 Belt Tension A WARNING EQUIPMENT FAILURE Excessive belt tension may lead to bearing failure and or shaft failure Failure to properly tension belts may result in serious personal injury death and or property damage Belt tension must be adjusted using a belt tension gage Adjusting belt tension by feel i e pushing on belt with fingers or hand may result in excessive belt tension In general belt tensions should be kept as loose as possible while still transmitting the required torque without slipping Belt tensions must be measured with a belt tension gage These inexpensive gages may be obtained through belt manufacturers or distributors V belts may squeal initially in high starting torque applications Proper belt tensio
18. g life can be obtained if the listed recommendations are followed NOTE If lubrication instructions are provided on the motor nameplate the nameplate instructions will supersede these instructions Motors marked Permanently Lubricated do not require additional service NOTICE BEARING MOTOR DAMAGE Lubricant should be added at a steady state of moderate pressure If added under heavy pressure bearing shield s may collapse Over greasing bearings greatly increases bearing friction and can cause premature bearing and or motor failure 4 2 1 GREASE TYPE unless nameplate states otherwise Nameplate Ambient Temperature between 30C 22F to 65C 150 F inclusive Recommended grease for standard service conditions is Polyrex EM Exxon Mobil Equivalent and compatible greases include Texaco Polystar RB Rykon Premium 2 Pennzoil Pen 2 Lube Chevron SRI amp Mobil SHC 100 Nameplate Ambient Temperature below 30C 22F Special low temperature grease is recommended such as Aeroshell 7 or Beacon 325 for ball bearings and Mobil SHC 100 for roller bearings Nameplate Ambient Temperature above 65C 150F Dow Corning DC44 or equivalent a special high temperature grease is required Note that Dow Corning DC44 grease does not mix with other grease types 4 2 2 BEARING OPERATING TEMPERATURE A CAUTION HOT SURFACE The external surface temperature of the end shield bracket bearing hub may reach 100 C 212 F during norm
19. ives in common bus configuration to share regenerated power 2 Increase capacity of dynamic braking circuit B Deceleration time is set too fast VFD s dynamic Increase deceleration time to reduce regenerated energy braking circuit overloads VFD cannot absorb regenerated power A Regal Beloit Company 2100 Washington St Grafton WI 53024 Ph 262 377 8810 Fax 262 377 9025 www leeson com Form 5968L 7 2011 R1 K PE wW
20. licable codes ordinances and sound practices Failure to follow these instructions could result in serious personal injury death and or property damage Only qualified personnel who are familiar with the applicable national codes local codes and sound practices should install or repair electric motors and their accessories WARNING ELECTRICAL LIVE CIRCUIT HAZARD Do not touch electrically live parts Disconnect lockout and tag input power supply before installing or servicing motor includes accessory devices WARNING ELECTRICAL LIVE CIRCUIT HAZARD Shaft rotation produces voltage in PM motors even when motor is disconnected from power source Do not open terminal box or touch unprotected terminals while the motor shaft is rotating Failure to do so may cause serious injury or death to personnel WARNING DISASSEMBLY APPROVAL REQUIRED Due to powerful magnetic fields disassembly and assembly of permanent magnet motors should only be performed by the manufacturer or specialized personnel authorized by the manufacturer WARNING MAGNETIC FIELD HAZARD Permanent magnet motor rotors contain powerful magnetic fields Exposure to magnetic field may cause serious health hazards to persons with pacemakers hearing aids or other implanted electronic medical devices and may impact other electronic devices such as mobile phones credit cards etc WARNING ELECTRICAL SAFETY Refer to Section 1 0 for additional warnings before proceeding with m
21. m Avg Min Max Avg Min Max Avg Deflected Sheave Deflected Sheave Deflected Dia in Belt of Dia in Belt of Type Type oo avy 1 J lj ayx 1 J 1 S i 1 60 4 Oooo o ee Notes 1 The ratings listed above assume normal frame size assignments per NEMA MG 1 2009 Table 13 2 Horsepower is the nameplate motor horsepower and RPM is the motor driver speed Minimum sheave diameters are from NEMA standards where applicable For variable speed applications or values outside these recommendations consult motor manufacturer Selections are based on a 1 4 belt service factor 5 to 1 speed reduction and various Power Transmission Manufacturers catalogs These selections are for Narrow V belt sections only Consult motor manufacturer for details on conventional V belt sections A B C D and E or other belt types Average Deflected Force is per section 3 3 4 4 of this document and is the force required to deflect the center of a belt 1 64 of the belt span distance Tolerance on this force is 1 Ibf for forces lt 10 Ibs and 2 Ibs for forces gt 10 lbs as measured utilizing a belt tension gage When more than one belt is required the belts must be a matched set matched for length If possible the lower side of the belt should be the driving side to increase the length of wrap on the sheave Do not exceed nameplate maximum RPM Oo aAPwWN COON NOTICE VFD Motor Setup It is the responsibili
22. may result in brake damage potentially leading to serious injury death or equipment damage 3 3 6 3 Space Heaters Motors provided with space heaters have two leads that are brought into the conduit box or into an auxiliary box These leads are marked H1 H2 H3 H4 if a second space heater is supplied See the space heater nameplate on motor for heater rating A WARNING DIVISION 2 EXPLOSION HAZARD The space heater temperature rating when used in Class Division 2 motors shall NOT exceed 80 of the auto ignition temperature of the hazardous gas or vapor See the space heater nameplate on motor for heater Temperature Code and heater rating Failure to follow this instruction could result in serious personal injury death and or property damage 3 3 6 4 Thermal Protection General Information When thermal protection is provided WITH OVERHEAT PROTECTIVE DEVICE will be stamped on the nameplate The motor is provided with an overheat protective device that does not directly open the motor circuit Motors nameplated with this phrase have either thermostats thermisters or RTDs The leads to these devices are routed into the motor conduit box or into an auxiliary box The lead markings are defined on the nameplate THERMOSTAT The circuit controlled by the thermostats must be limited to a maximum of 600 volts and 360 volt amps See connection decal provided inside the terminal box cover Failure to connect th
23. n is determined by measuring the force required to deflect the center of the belt a given distance The proper deflection in inches is determined by dividing the belt span in inches by 64 Calculate the proper deflection and then see Table 3 3 next page for the required Average Deflected Force to achieve that deflection Belt Span Center Deflected Force Table 3 3 After tensioning the belt rotate the sheaves for several rotations or operate the system for a few minutes to seat belts into the grooves then re tension the belts New belts will stretch during use and should be retensioned after the first eight hours of use 3 3 5 PERMANENT MAGNET MOTOR VFD Variable Frequency Drives OPERATION CAUTION Power Factor Correction Capacitors Placing power factor correction capacitors between the motor and VFD may cause personal injury and significant damage to the VFD Power factor correction capacitors should never be installed between the VFD and the motor and should not be installed at VFD input unless approved by VFD manufacturer NOTICE MOTOR NOT SUITED FOR OPERATION ON LINE POWER PM motors can only be operated by a PM motor compatible VFD Connecting directly to line power may result in motor damage Consult VFD installation and operation manual for additional instructions and safety information Table 3 3 Recommended Minimum Sheave Diameters Belt Type Number of Belts and Deflected Force 1800 rpm 3600 rp
24. nal injury death and or property damage WARNING EXCESSIVE SURFACE TEMPERATURE HAZARDOUS LOCATIONS Motors with the temperature code stated on the nameplate are designed to operate within this limit Improper application or operation can cause the maximum surface temperature to be exceeded A motor operated in a Hazardous Location that exceeds this surface temperature limit increases the potential of igniting hazardous materials Therefore motor selection installation operation and maintenance must be carefully considered to ensure against the following conditions 1 Motor load exceeds service factor value 2 Ambient temperature above nameplate value 3 Voltages outside of limits in Section 3 4 1 2 4 Loss of proper ventilation 5 VFD operation exceeding motor nameplate rating 6 Altitude above 3300 feet 1000 meters 7 Severe duty cycles 8 Repeated starts 9 Motor stall 10 Motor reversing and 10 Single phase operation Failure to follow these instructions could result in serious personal injury death and or property damage CAUTION USER CONTACT OF HOT SURFACE Normal motor surface temperatures may exceed 90 C 194 F Touching the motor frame may cause discomfort or injury Surface temperatures should only be measured with suitable instruments and not estimated by hand touch 3 4 5 1 Start Up No Load Procedure WARNING ROTATION HAZARD Incorrect motor rotation direction can cause serious or fatal injury
25. nment Replace with correct enclosure g i construction Incorrect grease or bearings for ambient extremes See section 4 2 1 Motor makes a rubbing grinding or squealing noise Isolate motor from load To locate point of contact turn motor shaft by hand Ref ontact between rotating and Stalionaly Section 2 1 2 If point of contact is not located contact motor manufacturer authorized components service shop FD trips on Ground Fault VFD trips at low speed during starting Voltage OA boost is set too high Reduce boost repeat auto tune B Condensaton forms on motor winding Ae of moisture Dry out motor Add space heaters to motor Ref Section Disconnect leads at motor conduit box and Megger motor leads to ground Ref Section 4 1 2 If resistance is less than 1 5 mega ohms remove motor from service Service shop must check for excessive moisture or contamination on windings or short to ground Load to motor may be excessive or unbalanced Motor winding is shorted to ground Motor shaft cogs Motor leads are shorted together inside conduit box producing braking torque Isolate all OA Shall cogs when tu rned by hand leads and repeat shaft turning by hand Ref Section 3 4 5 1 B Shaft cogs when operated by VFD Voltage boost is excessive Reduce boost Repeat auto tune VFD trips during deceleration 1 Add dynamic brake resistors or change VFD to line regenerative design For multi drive installations connect dr
26. oad external to the motor including such things as sheave weight fan loads axial belt force pump load etc If the application is direct drive with no applied radial load or is beyond the limits listed consult the motor manufacturer APPLICATION ASSEMBLY TO MOTOR NOTICE EQUIPMENT DAMAGE Do not connect or couple motor to load until correct rotational direction is established 3 3 1 GENERAL PROPER ALIGNMENT of the motor and driven equipment minimizes vibration levels maximizes bearing life and extends the overall life of the machinery Consult the drive or equipment manufacturer for more information NOTICE BEARING FAILURE During assembly do NOT force components onto the shaft Striking or hammering the component may result in bearing damage 3 3 2 DIRECT COUPLING Use flexible couplings if possible For applications that apply radial axial or moment loading on the motor shaft see section 3 3 3 NOTICE BEARING FAILURE Unless approved by the motor manufacturer do NOT direct couple a vertical shaft up motor or roller bearing motor Direct coupling a vertical shaft up motor or a motor with a roller bearing may result in bearing damage 3 3 3 DIRECT CONNECTED Radial loading for direct connected equipment gears fans etc must be approved by the motor manufacturer unless within the maximum overhung load limits Table 3 2 Combined loading axial radial and or moments must be approved by motor manufacturer For belted
27. or b de energize VFD remove power then reconnect motor leads for reverse rotation Repeat jog cycle and ensure proper rotation 5 Record No Load Amps Watts amp Voltage Recommend To establish a baseline value check and record the no load amps watts and voltage 3 4 5 2 Start Up Load Connected Procedure 1 Check Instructions Before startup carefully read and fully understand these instructions including all warnings cautions amp safety notice statements 2 Coupling Installation Check that the connected equipment is properly aligned and not binding Check that all guards and protective devices are properly installed 3 Energize Motor When all personnel are clear of the machine apply power and verify that the load is not transmitting excessive vibration back to the motor though the shaft or the foundation Verify that motor amps are within nameplate rating The equipment can now be fully loaded and operated within specified limits as stated on the nameplate 4 0 _ MAINTENANCE A WARNING ELECTRICAL SHOCK HAZARD Voltage may be present at the motor terminals even after the motor has stopped rotating Disconnect power to the VFD and verify VFD DC output voltage is zero before performing service or maintenance Failure to follow this instruction could result in serious personal injury or death WARNING ELECTRICAL SHOCK HAZARD Electrical connections are to be made by a qualified electrician in accordance with all app
28. or equipment damage Verify rotation direction before coupling to driven equipment 1 Check Instructions Before startup carefully read and fully understand these instructions including all warnings cautions and safety notice statements 2 Motor out of storage after more than three months Check winding insulation integrity with a Megger If winding resistance to ground is less than 1 5 Meg ohms consult the local authorized service shop before energizing the motor 3 Check Installation Mechanical Check tightness of all bolts and nuts Manually rotate the motor shaft to ensure motor shaft rotates freely Note Motor will not turn freely if power leads are shorted together User may feel small pulsations when turning shaft due to the magnets in rotor Shaft amp bearing seals will add drag Electrical Inspect all electrical connections for proper terminations clearance mechanical tightness and electrical continuity Be sure to verify connections are made per the nameplate connection diagram or separate connection plate Replace all panels and covers that were removed during installation before energizing the motor 4 Energize Motor Check Rotation If practical check motor rotation before coupling to the load If motor has a rotational arrow only operate the motor in the rotation identified Energize VFD and momentarily jog motor to verify direction of rotation If opposite rotation is required a select reverse rotation from VFD
29. otor includes accessory devices Use a voltmeter to verify that power is off before contacting conductors WARNING ELECTRICAL SHOCK HAZARD Shaft rotation produces voltage in PM motors even when motor is disconnected from power source Do not open terminal box or touch unprotected terminals while the motor shaft is rotating Failure to do so may cause serious injury or death to personnel WARNING ELECTRICAL HAZARD Shaft rotation produces voltage in PM motors even when motor is disconnected from power source Do not operate the motor or allow equipment to back drive the motor above the maximum RPM listed on the motor nameplate Failure to do so may cause serious injury or death to personnel or damage the motor or system equipment WARNING ELECTRICAL GROUNDING HAZARD Failure to properly ground motors per the National Electrical Code NEC Article 430 and local codes may cause serious injury or death to personnel For general information on grounding refer to NEC Article 250 Also see Ground Connections section 3 4 4 WARNING MAGNETIC FIELD HAZARD Permanent magnet motor rotors when removed from the stator expose surrounding personnel and equipment to powerful magnetic fields which may cause serious health hazards to persons with pacemakers hearing aids or other implanted electronic medical devices and may impact other electronic devices such as mobile phones credit cards etc NOTICE MOTOR NOT SUITED FOR OPERATION ON LINE P
30. quency drive VFD operating manual and applicable electric codes for branch circuit protection sizing WARNING PROTECTIVE DEVICE DISABLED HAZARD DO NOT bypass or disable these or other protective devices Protection removal could result in serious personal injury death and or property damage 3 4 1 2 AC Power Supply Limits PM motors are designed to operate with variable frequency drives with rated input voltage 600 VAC or less Drive RMS output voltage should not exceed motor nameplate voltage for which the motor is connected NOTICE REDUCED MOTOR PERFORMANCE Operation outside of these limits will degrade motor performance and increase operating temperature 3 4 2 TERMINAL BOX A WARNING ELECTRICAL SHOCK HAZARD Shaft rotation produces voltage in PM motors even when motor is disconnected from power source Do not open terminal box or touch unprotected terminals while the motor shaft is rotating Failure to do so may cause serious injury or death to personnel 3 4 2 1 Conduit Opening For ease of connections motors are typically provided with large terminal boxes Most motors have conduit access in 90 degree increments the terminal box conduit opening is typically provided via knockouts holes with covers or the terminal box is rotate able Fabricated conduit boxes may have a removable plate for the installer to provide correctly sized hole s 3 4 3 LEAD CONNECTIONS Electrical connections are to be made per nameplate conne
31. r manufacturer for additional information LUBRICATION PROCEDURE 1 Clean the grease inlet plug or zerk fittings prior to regreasing 2 If present Remove grease drain plug and clear outlet hole blockage 3 Add grease per Table 4 4 4 Re install grease inlet and drain plugs if removed 4 2 5 EXAMPLE LUBRICATION Assume NEMA 286T IEC 180 1750 RPM Vertical motor driving an exhaust fan in an ambient temperature of 43 C and the atmosphere is moderately corrosive 1 Table 4 1 list 10 000 hours for standard conditions 2 Table 4 2 classifies severity of service as Severe with a multiplier of 0 5 3 Table 4 3 lists a multiplier value of 0 5 for Vertical 4 Eq 4 2 Interval 10 000 hrs x 0 5 x 0 5 2500 hrs 5 Table 4 4 shows that 1 5 cubic inch of grease is to be added Relubricate every 2 500 hrs of service with 1 5 cubic inch of recommended grease 4 3 TROUBLE SHOOTING WARNING READ INSTRUCTIONS Before trouble shooting a motor carefully read and fully understand the warnings cautions amp safety notice statements in this manual Failure to do so could cause severe injury death and or equipment damage 4 3 1 GENERAL TROUBLE SHOOTING WARNINGS 1 Disconnect power to the VFD and verify VFD DC output voltage is zero before performing service or maintenance 2 Always keep hands hair and clothing away from moving parts 3 Be sure required safety guards are in place before starting eq
32. r for installations requiring longer cable runs please contact the motor manufacturer Table 3 5 Max Cable Lengths These values are based on 3 kHz carrier frequency Add suitable VFD output side filters when exceeding the listed values Frame Size 230v 460V S75V 3 3 5 3 VFD Grounding See Grounding section 3 4 4 3 3 5 4 Stray Voltage on Accessory Leads VFDs will couple stray voltage to accessories such as RTDs thermistors thermostats and space heaters The leads of these elements must be properly insulated and control input circuits must be designed to withstand this voltage risk for serious personal injury or death or cause damage to nearby equipment If people or equipment will be in the vicinity of the motor a backup system should be supplied WARNING Vertical Motor Premature Brake Failure Motors with brakes that are designed for vertical applications are equipped with springs to support the brake pressure plate Mounting a horizontal brake motor vertically shaft up or down may require a pressure plate spring modification Failure to modify the brake for the vertical application may result in premature brake failure creating a risk of serious personal injury or death and or equipment damage If in question consult brake literature or brake manufacturer A WARNING DO NOT CONNECT BRAKE SOLENOID to the output of a VFD The brake solenoid must be wired to 50 60 Hz line power for proper operation Failure to do so
33. r lifting only the motor and accessories mounted by the motor manufacturer unless specifically stated otherwise on the motor Utilizing the motor lifting provision to lift other components such as pumps and gear boxes could result in serious personal injury death and or property damage WARNING FALLING OBJECT HAZARD Before using the lifting provision check the eyebolts and or other lifting means to assure they are not bent or damaged and are completely threaded seated amp secured to the motor Equipment to lift motor must have adequate lifting capacity While lifting the motor DO NOT stand under or in the vicinity of the motor Failure to follow these instructions could result in serious personal injury death and or property damage SINGLE LIFTING DEVICE TYPICAL MULTIPLE LIFTING DEVICES TYPICAL 2 3 STORAGE Motors not put into service immediately must be stored indoors in a clean dry location Avoid locations with large temperature swings that will result in condensation Motors must be covered to eliminate airborne dust and dirt If the storage location exhibits high vibration place isolation pads under motor to minimize damage to motor bearings 2 3 1 BEARING LUBRICATION Bearings are grease packed at the factory relubrication upon receipt of motor or while in storage is not necessary If stored more than one year add grease per lubrication instructions Table 4 4 before start up 2 3 2 SHAFT ROTATION see Elect
34. rical Shock Hazard Warning in section 2 1 It is recommended that the motor shaft be rotated 5 to 10 rotations every three months to distribute the grease in the bearings This will reduce the chance for corrosion to form on the bearing rolling elements and raceways Note User may feel small pulsations when turning shaft due to the magnets in rotor Shaft seals and bearing seals may add drag 2 3 3 DAMP OR HUMID STORAGE LOCATIONS Treat unpainted flanges shafts and fittings with a rust inhibitor Apply appropriate power to the motor s space heaters if so equipped 3 0 INSTALLATION AND OPERATION A WARNING ELECTRICAL SHOCK HAZARD Only qualified personnel who are familiar with and understand the appropriate national codes local codes and sound practices should install or repair electrical motors and their accessories Installation should conform to the appropriate national code as well as local codes and sound practices Failure to follow these instructions could result in serious personal injury death and or property damage WARNING ELECTRICAL LIVE CIRCUIT HAZARD Do not touch electrically live parts Disconnect Lockout and Tag input power supply before installing or servicing motor includes accessory devices Use a voltmeter to verify that power is off before contacting conductors WARNING ELECTRICAL SHOCK HAZARD Shaft rotation produces voltage at PM motor leads and connected equipment even when motor is disconnected from power
35. rpm should match the nameplate value within 10 1 Decrease acceleration setting in VFD Acceleration rate set too long 2 Make sure motor is wired to match VFD output voltage 3 Verify motor nameplate voltage matches VFD output voltage Ref Section 3 4 1 2 Supply voltage has drooped or become severely Ensure that steady state supply voltage at VFD input terminals is within limits Ref unbalanced Section 3 4 1 2 Correct as needed 1 Verify the motor rating and VFD current capability are sized correctly for the load 2 Set current torque limit setting to match the maximum motor capability Ref Section 3 4 5 3 Disconnect motor from load amp ensure motor turns freely Ref Section 3 4 5 Rotor magnets have been partially demagnetized due to excessive heat or excessive current e e x D 2 e e e gt Q e S O O D D Load exceeds motor VFD capability Motor rotates in the wrong direction a Nioisriead wing isTeversed ercommanced 1 Interchange any two motor leads between motor and VFD output terminals Ref oC tee bey Section 4 0 Girection is reversed at VER 2 Program direction change in VFD FD trips repeatedly on overload or motor over temperature fault 1 Verify the motor rating and VFD current capability are sized correctly for the load 2 Set current torque limit setting to match the maximum motor capability Ref Section 3 4 5 3 Disconnec
36. s required The application and operation is beyond the control of the motor manufacturer Failure to do so may cause serious injury or death to personnel 2 0 RECEIVING AND INSPECTION 2 1 INITIAL INSPECTIONS WARNING ELECTRICAL SHOCK HAZARD Shaft rotation produces voltage at motor leads and connected equipment even when motor is disconnected from power source Do not open terminal box or touch unprotected terminals while the motor shaft is rotating Failure to do so may cause serious injury or death to personnel 2 1 1 CHECK PACKING LIST AND INSPECT the packaging to make certain no damage has occurred in shipment If there is visible damage to the packaging unpack and inspect the motor immediately Claims for any damage done in shipment must be made by the purchaser against the transportation company 2 1 2 TURN MOTOR SHAFT see Electrical Shock Hazard above by hand to be certain that it rotates freely Note Motor will not turn freely if leads are shorted together User may feel small pulsations when turning shaft due to the magnets in rotor Shaft seals and bearing seals may add drag CAUTION Observe caution when working near threads or keyways Finger or ring contact may cause injury 2 1 3 CHECK NAMEPLATE for conformance with purchase order requirements and compliance with power supply and control equipment requirements 2 2 HANDLING WARNING FALLING OBJECT HAZARD Eyebolts or lifting lugs where provided are intended fo
37. t motor from load amp ensure motor turns freely Ref Section 3 4 5 Ambienttemperat re toe High Confirm that ambient at motor does not exceed value stamped on motor nameplate p gn Reduce ambient as needed Ref Section 3 1 2 os Remove foreign materials clear vent openings fan guard air inlets and frame fins Motor cooling fins and or vent openings blocked TEFC motors Ref Section 4 1 1 as TEAO Totally Enclosed Air Over motors Measure airflow next to motor surface and si Insufficient Air Rie obtain minimum requirements from motor manufacturer Ref Section 3 1 3 1 E Load acceleration time is set too short Increase acceleration time as needed Start stop time duty cycle is too short or too 1 Increase acceleration deceleration times frequent 2 Reduce the number of start stop cycles Motor Vibrates Motor misaligned to load Realign load 1 Ensure that load is dynamically balanced 2 Verify that motor shaft is not bent Uncouple motor from load and inspect motor shaft Rule of thumb is 0 002 runout for shafts extension lengths up to 3 00 Add 0 0005 per every additional inch of shaft length beyond 3 00 1 Belts are not evenly worn Realign motor to load and replace all belts Ref Section 3 3 4 2 A mix of new and used belts is used Replace multiple belt applications with a complete set of matched belts Ref Section 3 3 4 Load exceeds motor VFD capability Load out of balance Une
38. ty of the startup personnel during set up of the VFD motor system to properly tune the drive to the motor for the specific application per the VFD user manual The correct voltage boost volts per hertz and overload current level settings are application dependent and unique to each motor design Current setting shall not exceed nameplate service factor amps Failure to 3 3 6 2 Brake Motors connect over temperature devices when provided will void the A warranty WARNING Backup Brake System Failure of the brake may put people in the vicinity of the motor at 3 3 6 ACCESSORIES PROVISIONS 3 3 6 1 General Carefully read and understand the accessory manufacturer s instructions supplied with motor Contact the manufacturer for additional information 3 3 5 1 Overspeed Capability Do not exceed nameplate maximum RPM without first contacting manufacturer WARNING ELECTRICAL HAZARD Shaft rotation produces voltage in PM motors even when motor is disconnected from power source Do not operate the motor or allow equipment to back drive the motor above the maximum RPM listed on the motor nameplate Failure to do so may cause serious injury or death to personnel or damage the motor or system equipment 3 3 5 2 Cable Lengths These motors are equipped with an insulation system designed for use with variable frequency drives For optimum insulation life limit VFD to motor cable lengths as documented in Table 3 5 For additional information o
39. uctions STOP and contact the motor manufacturer Table of Contents 1 0 SAFETY INFORMATION 1 1 Electrical Safety 1 2 Mechanical Safety 1 3 Environmental Safety 2 0 RECEIVING amp INSPECTION 2 1 Initial Inspection 2 1 1 Packing List amp Inspect 2 1 2 Turn Motor Shaft 2 1 3 Check Nameplate 2 2 Handling 2 2 1 Lifting Angle Limitations 2 3 Storage 2 3 1 Bearing Lubrication 2 3 2 Shaft Rotation 2 3 3 Damp or Humid Storage Locations 3 0 INSTALLATION AND OPERATION 3 1 Location 3 1 1 Selecting a Location 3 1 2 Ambient Temperature Limits 3 1 3 Construction Selection per Location 3 1 3 1 Totally Enclosed 3 1 3 2 Hazardous Locations Motors 3 2 Mounting Motor 3 2 1 Rigid Base Footed 3 2 2 Rigid Base Hole Selection 6 or 8 Hole Bases 3 2 3 Vertical Mounting 3 3 Application Assembly to Motor 3 3 1 General Proper Alignment 3 3 2 Direct Coupling 3 3 3 Direct Connected 3 3 4 Belted 3 3 4 1 Sheave Diameter Requirements 3 3 4 2 Number of Belts 3 3 4 3 Sheave Location 3 3 4 4 Belt Tension 3 3 5 Permanent Magnet Motor VFD Operation 3 3 5 1 Overspeed Capability 3 3 5 2 Cable Lengths 3 3 5 3 VFD Grounding 3 3 5 4 Stray Voltage On Accessory Leads 3 3 6 Accessories 3 3 6 1 General 3 3 6 2 Brake Motors 3 3 6 3 Space Heaters 3 3 6 4 Thermal Protection 3 3 6 5 RTD Alarm amp Trip Settings 3 3 7 Guards 3 4 Electrical Connections 3 4 1 Power Supply Branch Circuit 3 4 1 1 Fuses Breakers Overload Relays 3 4 1 2 AC Power Supply Limits 3 4
40. uipment 4 Ifthe problem persists contact the manufacturer Motor Trouble shooting Cause Corrective Action Table 4 5 A Before conducting any trouble shooting be sure to read and follow all safety warnings and instructions Failure to do so could cause severe injury death and or equipment damage Issue Likely Cause Corrective Action Motor fails to start upon initial installation Ensure that rated input voltage is present at VFD Ref Section 3 4 1 2 Zea Low or no input voltage to VFD Check line fuses Ref Section 3 4 1 1 ae Match motor lead wiring to motor nameplate connection diagram for operating Motor leads are not connected or miswired in j s oltage Ref Section 3 4 3 conduit box or at VFD output terminals Driven load exceeds motor VFD capacity VFD may trip on overload fault Load is jammed or motor is binding VFD trips on Disconnect motor from load amp ensure motor turns freely Ref Section 3 4 5 overload fault Verify that motor starts when disconnected from load Ref Section 3 4 5 Remove excessive binding load if present Acceleration time set too short ncrease acceleration to maximum acceptable time for the application VFD programmed incorrectly VFD trips on 1 Repeat checks listed above overload fault 2 Consult VFD service manual Ref Section 3 3 5 Ey Verify that motor amp load turn freely Ref Section 3 4 5 Motor has been running then slows down stalls or fails to rest
41. ven tension on multiple belts 1 De energize motor and record vibration as load coasts from 100 speed to 0 RPM If vibration drops immediately vibration source is electrical If levels do not drop immediately source is mechanical 2 If electrical sources program skip frequencies to bypass resonant points 3 If mechanical redesign system to operate below the resonant point Driven load operating at resonant point natural frequency Uneven weak or loose mounting support Shim strengthen or tighten where required Uncouple motor from load and rotate shaft by hand Ref section 2 1 2 If you hear noise or feel roughness have bearings replaced Ref Section 4 0 For motors with regreasing provisions add grease per relubricating instructions Ref Section 4 2 3 If noise persists contact motor manufacturer Motor bearings worn Motor is balanced at the factory and will remain balanced in operation If motor balance is in question remove motor from application and send to a motor manufacturer authorized service shop for inspection Do not attempt to disassemble motor in the field Motor out of balance earings repeatedly fail 1 If belt drive check system per section 3 3 4 2 Other than belting check loading on motor shaft An unbalanced load will also cause the bearings to fail 3 Check run out of mating components such as a C face and pump flange Bearinae contaminated Motor enclosure not suitable for enviro
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