Centrifugal and Axial Fans Installation & Maintenance Manual

VERANTISE n v i r o n m e n t a l S o l u t i o n s G r o u pInstallation & MaintenanceManual forCentrifugaland Axial FansCONTENTS INSTALLATION: I. General ...................................................................... 1 II. Inspection ................................................................. 1 III. Storage .................................................................... 1 IV. Handling .................................................................. 1 V. Fan Base Grout ........................................................ 1 VI. Fan Installation ........................................................ 1 VII. Motor Installation .................................................... 2 START–UP: I. Safety Checklist ..................................................... 2, 3 II. General ..................................................................... 3 III. Trouble Shooting ..................................................... 4 MAINTENANCE: I. Safety ......................................................................... 5 II. General ..................................................................... 5 III. Bearings ................................................................... 5 IV. Sheaves .............................................................. 5, 6 V. Belts ......................................................................... 6 VI. Motor ....................................................................... 7 VII. Impeller ................................................................... 7 VIII. Removable Bearing Assembly . ............................. 8 IX. Housing ................................................................... 8 GENERAL TERMS OF SALE: I. Terms and Conditions ............................................... 9 II. Returned or Rejected Goods .................................... 9 III. Proprietary Data ...................................................... 9 INSTALLATION I. GENERAL Verantis fans are known for their quality, efficient performance, and long life in corrosive environments. Each fan has been inspected and tested before being released for shipment. Proper care in the installation and operation of the fans will assure long and trouble free service. These fans are manufactured of corrosion resistant fiberglass reinforced plastic (FRP). Care must be taken during handling and installation to prevent damage that may be caused from stress or shock. II. INSPECTION All products are inspected prior to shipment but should be inspected immediately upon receipt and before any attempt is made to unload. First, visually inspect for any signs of damage. Using the following checklist, look for breakage and abrasion which should be very easy to recognize. Impact damage would appear as whitening of the surface or star shaped cracks or crazes. Such damage, if confined to the exterior may only be superficial. Here is a check list to assist you: 1. Is the shipping media still intact? (Check for loose banding, or damage shipping crates.) 2. Is there any damage to the extremities of the fan? (Check the ends, tip and sides, and any protruding parts such as flanges and/or nozzles for evidence of damage.) If any parts are found to be damaged, a claim should be filed immediately against the freight carrier. Do not put the fan into service until fully repaired. III. STORAGE All fans should be stored in an area protected from the weather, free from potential damage by fork trucks or other vehicular traffic, If the fan is to be idle for more than 1 to 2 weeks, it is recommended that the impeller and motor be rotated several revolutions at least once a week for prevent bearing freeze up, and or avoid developing “flat spots” on fan and motor shafts. IV. HANDLING Do not remove the fan from its shipping crate before moving it to the point of installation. DO NOT lift the fan by the housing, canopy/guards, shaft or motor, Lifting straps should be attached only to the structural steel base, or use clevis pins if the fan skid has “lifting holes” provided in all four corners of the skid. Lifting lugs, if provided on the fan housing are only to be used in lifting the “pie section” of the housing and not the entire fan. V. FAN BASE GROUT (For Centrifugal Fans) To assure continued alignment, we recommend the use of a high strength, non-shrink epoxy grout that provides the desired mechanical properties for support of the fan. Such support ensures the proper transmission of static and dynamic loads to the equipment foundation. VI. FAN INSTALLATION Particular care must be taken when installing the fan to assure that the fan base is not twisted or misaligned when anchoring to the foundation. Do not force the base into alignment. Use shims, if necessary, to assure proper alignment. A twisted or misaligned base will result in incorrect gaps between the fan inlet, impeller and housing. Operating the unit in that condition can cause the impeller to rub on the inlet and/or housing, resulting in damage to the unit. Check all bolts at locations listed below to assure that none have loosened, and before starting the fan: 1. Fan back plate. (Centrifugal fans only.) 2. Access door (where applicable). 3. Motor base. 4. Fan base. (Centrifugal fans only.) 5. Bearing mounting bolts. 6. Set screws on bearing locking collar. Before wiring the motor, rotate fan wheel by hand to check for free rotation and to assure that the impeller has not shifted such that it would be rubbing against the fan housing. All ductwork and/or stack must be self-supporting and independent of the fan. The use of flexible sleeves is recommended to make connections to the fan inlet and discharge. These flexible sleeves help prevent the transmission of stresses onto the fan from the ductwork and/or stack. If flanges must be used, a soft sponge gasket should be installed between the flanges to avoid air or condensate leakage. In this case, the connecting ductwork must be properly aligned to avoid distorting the fan housing. Excessive pressure applied when bolting a flange connection may cause damage to the fan housing or flange. All ductwork and/or stacks connected to Verantis fans must be independently supported. The fan inlet and outlet are not intended nor designed to support any connecting duct or stack. Install all accessory equipment that is not already preassembled with the fan, such as belt and shaft guards or motor and drive canopy, vibration isolators. Wire the motor in accordance with the wiring diagram that is supplied with the motor. Check to be sure that the sheaves are properly aligned. See “Belts” under Maintenance section. 2The drain line must be installed using either a U-traparrangement or an equivalent method (drain leg issubmerged in liquid). To obtain a proper seal, the leglength must be greater than the system pressure drop.VII. MOTOR INSTALLATIONSAFETY WARNING: High voltage and rotating partsof electrical machinery can cause serious or fatalinjury. Its installation, operation and maintenanceshould be performed by qualified personnel only,Familiarization with NEMA MG2 “Safety Standard forConstruction and Guide for Selection, Installation andUse of Fractional and Integral HP Motors andGenerators”, the National Electrical Code, and soundlocal practices is recommended.For equipment covered by these instructions, it isimportant to observe safety precautions to protectpersonnel from possible injury. Personnel should beinstructed to:Avoid contact with energized circuits.Disconnect all power sources before attempting work on the motor.Installation:1. Motor TypesA. Dripproof motors are designed for installationin a well ventilated place where the atmosphereis reasonably free of dirt and moisture.B. Totally enclosed fan cooled motors (TEFC)are designed for installation where motor maybe exposed to dirt, moisture and most outdoorconditions.C. Severe-duty motors are designed for installa-tion in a highly corrosive or excessively moistatmoshperes.D. Explosion proof motors have a U/L label whichindicates manufacture to Underwriters’Laboratories standards for hazardous locationsshown on the label.2. Power Supply and ConnectionsA. Nameplate voltage and frequency should agreewith power supply. Motor will operate satisfac-torily on line voltage within 10% of nameplatevalue and frequency within 5% of the nameplatevalue. The combined variation of frequencyand voltage must not exceed 10%.B. Dual voltage motors can be connected for thedesired voltage by following instruction onnameplate of connection diagram.C. Wiring of motor and control, overload protectionand grounding should be in accordance withNational Electrical Code and local building codes.D. Remove drain plugs from the frame of enclosedmotors used outdoors or in other high moistureareas.START–UPI. SAFETY CHECKLISTINSPECT THE SYSTEM TO BE SURE THAT THEREIS NO DEBRIS LEFT IN THE DUCT.BEFORE OPENING ACCESS DOOR, REMOVINGGUARDS (IF APPLICABLE), AND/OR FAN HOUSINGOR DUCTWORK, BE SURE THE MAIN ELECTRICALDISCONNECT SWITCH IS LOCKED IN THE POWER“OFF” POSITION.NEVER REMOVE BELT AND SHAFT GUARDS ORMOTOR AND DRIVE CANOPY UNLESS THE MAINELECTRICAL DISCONNECT SWITCH IS LOCKED INTHE POWER “OFF” POSITION.NEVER ATTEMPT TO PERFORM ANY MAIN-TENANCE ON THE FAN UNLESS THE MAIN ELEC-TRICAL DISCONNECT SWITCH IS LOCKED IN THEPOWER “OFF” POSITION.DO NOT ATTEMPT TO REPLACE BELTS, SHEAVES,BEARINGS, SHAFT OR IMPELLER BEFORE BECOM-ING FAMILIAR WITH THE SPECIFIC PROCEDURESDETAILED IN THIS MANUAL.BEFORE OPERATING FAN, MAKE CERTAIN THATALL SAFETY GUARDS ARE PROPERLY INSTALLED.DO NOT RUN THE FAN AT SPEEDS GREATERTHAN THE MAXIMUM RPM SHOWN ON THE FANNAMEPLATE.BEFORE OPERATING FAN, VISUALLY CHECK BELTTIGHTNESS (FIGURE 4) AND VERIFY THAT BEAR-INGS ARE LUBRICATED. ALL BEARINGS AREGREASED AT THE FACTORY PRIOR TO SHIPMENT.DO NOT OVER GREASE THE BEARINGS AS HIGHBEARING TEMPERATURES AND POSSIBLEDAMAGE TO THE FAN AND/OR COMPONENTSMAY RESULT.START THE FAN AND NOTE WHETHER THE BELTSSQUEAL OR SLIP. TO CORRECT, THE TENSIONMUST BE ADJUSTED BY ADJUSTING THE CENTERDISTANCE. REFER TO “BELTS” UNDER THE MAIN-TENANCE SECTION ON HOW TO OBTAIN PROPERBELT TENSION.CHECK FOR EXCESSIVE NOISE OR VIBRATION.(REFER TO “VIBRATION AND NOISE” UNDER“TROUBLE SHOOTING” BELOW.) IF THE NOISEAND/OR VIBRATION CONTINUE, CONTACT YOURFACTORY REPRESENTATIVE OR THE FACTORYDIRECT. DO NOT OPERATE THE FAN IF EXCES-SIVE NOISE OR VIBRATION IS PRESENT.PRIOR TO SHIPMENT, ALL IMPELLERS ARESTATICALLY AND DYNAMICALLY BALANCED.FULLY ASSEMBLED FANS ARE DYNAMICALLYBALANCED AT THE FACTORY AND RUN TOMINIMIZE CONCERNS REGARDING FAULTYBEARINGS AND/OR VIBRATION.PRIOR TO STARTING FAN:1. Dry the motor windings if stored in a damp location.In drying, do not exceed 85ºC (185ºF).2. Check rotation under no–load conditions. To reverserotation:3 phase – interchange any two line leads2 phase – interchange line leads 1 and 31 phase – follow connection nameplate or label onmotor.3. Operate under load for at least one hour. Thenobserve whether any unusual noise or heating hasdeveloped.4. Check operating current against nameplate.5. Check the motor with an ammeter and compare thecurrent drawn by the motor with the amperes shownon the motor nameplate. Do not operate the fan withthe motor overloaded as this may burn out the motorand void the motor manufacturer’s warranty.SAFE MOTOR OPERATION:Avoid contact with rotating parts and be sure that shaftkey is fully captive before motor is energized.Avoid contact with the start or run capacitors in single–phase motors until a safe discharge procedure hasbeen followed.Act with care and in accordance with prescribed pro-cedures in handling, lifting, installing, operating andmaintaining the equipment. Do not lift motor and fanusing only motor lifting means. If eyebolts are used forlifting motors, they must be securely tightened, and thedirection of the lift must not exceed a 15 degree anglewith the shank of the eyebolt.Do not use motors with automatic–reset thermal pro-tection where unexpected starting of equipment mightbe hazardous to personnel. Provide proper safeguardsfor personnel against possible failure of motor–mountedbrake, particularly on applications involving overhaul-ing loads.Safe maintenance practices and qualified personnelare imperative. Before initiating maintenance pro-cedures, be sure that all power sources are discon-nected from the machine and accessories to void elec-tric shock and personal injury from rotating parts, If ahigh–potential insulation test is required, proceduresand precautions outlined in NEMA Standards MG1should be followed.FAILURE TO PROPERLY GROUND MOTOR MAYCAUSE SERIOUS INJURY TO PERSONNEL.GROUNDING SHOULD BE IN ACCORDANCE WITHTHE NATIONAL ELECTRICAL CODE AND CONSIS-TENT WITH THE SOUND LOCAL PRACTICE.II. GENERALBefore starting up the fan be sure that you have remov-ed all debris from the inlet ductwork and fan housingand that there are no unsafe conditions existing.Check the fan for proper rotation by momentarily start-ing the blower. The rotation should be as indicated bythe arrow on the fan housing. If the arrow is missing,the rotation can be determined from the drive end. (SeeFigures 1 and 2 for centrifugal fans.) For axial fans, theimpeller should rotate in a clockwise manner whenviewed from the drive end.Check the housing drain to assure proper drainage.Check all bolts and belt tension after 1 hour. Refer tothe maintenance section for periodic maintenancerequirements. Make necessary adjustments.3Clockwise Top HorizontalFigure 1Counterclockwise Top HorizontalFigure 24Capacity or Pressure Below Rating1. Total resistance of system higher than anticipated.2. Speed too low.3. Dampers not properly adjusted.4. Poor fan inlet or outlet conditions.5. Air leaks in system.6. Damaged impeller.7. Incorrect direction of rotation.Vibration and Noise1. Misalignment of bearings, couplings, wheel or V–belt drive.2. Unstable foundation.3. Foreign material in fan causing unbalance.4. Worn bearings.5. Damaged wheel or motor.6. Broken or loose bolts and set screws.7. Bent Shaft.8. Fan wheel or driver unbalanced.9. Fan delivering more than rated capacity.10. Speed too high or fan rotating in wrong direction.11. Vibration transmitted to fan from some other source.Overheated Bearings1. Too much grease in ball bearings.2. Poor alignment.3. Damaged wheel or driver.4. Bent shaft.5. Dirt in bearings.6. Excessive belt tension.Overload on Driver1. Speed too high.2. Discharging over capacity due to existing systemresistance being lower than original rating.3. Specific gravity or density of gas above design value.4. Packing too tight or defective on fans with stuffing box.5. Wrong direction of rotation.6. Shaft bent.7. Poor alignment.8. Wheel wedging or binding on inlet bell.9. Bearings improperly lubricated.10 Motor improperly wire.Open damper or speed up fan. Make sure you donot overload motor.See above.Reset.Contact Factory for assistance.Locate and seal.Replace impeller. Reverse motor leads.Check Alignment.Shim/strengthen.Clean out.Replace bearings.Replace.Replace or Tighten.Replace shaft.Return to factory for rebalance.Increase system resistance.Change sheaves or reverse motor leads.Isolate fan with flex connectors and vibration isolators.Remove alimite fittings and run to reduce grease.Realign.Replace.Replace shaft.Replace.Loosen.Slow down by sheave change.Increase resistance.Consult Factory.Loosen.Change motor leads.Replace.Realign.AlignConsult bearing manufacturer.Consult motor manufacturer.III.TROUBLE SHOOTINGCORRECTIVE ACTIONMAINTENANCEI. SAFETYBEFORE ANY MAINTENANCE IS PERFORMED ONTHE FAN BE SURE THAT THE MAIN ELECTRICALDISCONNECT SWITCH IS LOCKED IN THE POWER“OFF” POSITION.II. GENERALMaintenance inspections should be performed after afew hours, after one day, after one week, after twoweeks, and at least once a month thereafter. All main-tenance checks should include the following items as aminimum:1. Check and tighten if necessary, bolts securingtaper lock bushing to impeller hub after 1 houroperation, after 2, 4, 6, and 8 hours, and after oneweek of operat ion, then dur ing month lymaintenance inspections.2. Check V–belt tension.3. Check bolt tightness – avoid excess tightening.4. Check fan bearings for lubrication, wear andoverheating.5. Check bearings for excessive vibration.6. Check impeller and housing for build–up of foreignparts and overheating.7. Check condition of FRP.III. BEARINGSLubrication: Bearings are pre–lubricated at the factoryso it is not necessary to add grease to new bearings.If the bearings have been stored of idle for a periodof time, add a little fresh grease before running. Thereshould be a little grease showing at the seals.Improper lubrication will cause high bearingtemperatures. Depending upon the size bearings andthe speed, the bearings may be “warm to the touch”up to “too hot to touch for more than a few seconds”.High temperature in conjunction with excessive leakageof grease indicates too much grease. To overcome thiscondition, remove the grease fitting to allow the excessgrease to escape. High temperature with no greaseshowing usually indicates too little grease. This lattercondition is often accompanied by noisy bearings. Aslight amount of grease showing at the seals indicatesthat the bearings are properly lubricated.Mounting: Shaft must be straight and free from burrs. Slide bearings on shaft with the locking collars towardthe ends of the shaft. Place bearings in position andinstall bolts, snug.Verify alignment. Tighten bolts. Shaft should slide freelyend to end. Before tightening the locking collar, be sureshaft is centered properly.Tighten the eccentric cam locking collar of the bear-ing at the impeller end. The locking collar design pro-vides a positive lock of the wide inner ring bearing tothe shaft. To tighten, turn the locking collar in the direc-tion of the shaft rotation to the lock position, then tightenthe collar set screw.Tighten the sheave end bearing eccentric cam lockingcollar.IV. SHEAVESInstallation: Whether installing new belts or a complete-ly new drive, worn bearings, bent shafts or other com-ponents, that might cause future problems should bereplaced at this time. If installing belts only, checkexisting sheaves carefully for worn grooves or otherdamage. (Always use gloves or a rag for feeling in thesheave grooves to protect from cuts due to nicks orburrs.)Worn grooves can be detected by feel, or by sight.Worn grooves can shorten belt life by as much as 50%,which in turn increases the cost of maintenance.Therefore, worn sheaves should also be replaced.Rusty or dirty sheaves also impair a drive’s efficiency.Clean existing sheaves thoroughly before installing anew set of belts. A safe cleaning fluid, such a methylchloroform, is recommended.Make sure the bore of the sheave and the tapered conesurface of the bushing are free of all foreign substancessuch as paint, dirt and lubricants.To Remove Sheaves1. Loosen and remove cap screws.2. Insert cap screws in tapped removal holes and pro-gressively tighten each one until mating part is looseon bushing.3. Remove mating part from bushing and, if necessary,bushing from shaft. If bushing won’t slip off shaft,wedge screwdriver blade in saw cut to overcometightness.When replacing sheaves, place bushing into sheave.Loosely insert the cap screws into this assembly. Donot lubricate the cap screw threads.With key in keyseat of shaft, slide the sheave/bushingassembly to its desired position with cap screw headsto the outside. (A few small sheaves may have to beinstalled with the cap screws on the inside.) If thebushing is hard to slide onto the shaft, wedge ascrewdriver blade into the saw cut to overcome thetightness. Align sheaves by sight, but do not tighten yet.56To check the alignment of the sheaves on the shafts,a straightedge or a piece of string can be used. If thesheaves are properly lined up, the string will touch themat the points indicated by the arrows in the accompa-With sheaves aligned, tighten cap screws evenly andprogressivelyInspect Sheaves OftenKeep all sheave grooves smooth and uniform. Burrsand rough spots along the sheave rim can damagebelts. Dust, oil and other foreign matter can lead to pit-ting and rust, and should be avoided as much aspossible.A shiny groove bottom indicates that either the sheave,the belt or both are badly worn and the belt is bottom-ing in the groove.Badly worn grooves cause one or more belts to ridelower than the rest of the belts and the effect is thesame as with mis–matched belts. This is called “differ-ential driving”. The belts riding high in the groovestravel faster than the belts riding low. In a drive underproper tension, a sure sign of differential driving is whenone or several belts on the tight side are slack.V. BELTSBelt MaintenanceDirt and grease reduce belt life. Belts should be wipedwith a dry cloth occasionally to remove any build–up offoreign materials. If the belts have been splattered withnying sketch (Figure 3). Rotating each sheave a halfrevolution will determine whether the sheave is wob-bly or the drive shaft is bent. Correct any misalignment.grease and/or oil, clean them with methyl chloroformor soap and water. Flammable cleaners such asgasoline are to be avoided as a matter of safety.Under no circumstances is the use of belt dressingrecommended on the V–belt. The remedial effect is onlytemporary. It is much better to keep the belts andgrooves of the drive clean.Belt ReplacementShorten the center distance between the driven anddriver sheave so the belt can be put on without the useof force. NOTE: Never “roll” or “pry” the belts into the sheavegrooves. This can damage the belt cords and lead tobelt turnover, short life or actual breakage. Moreover,it is both difficult and unsafe to install belts this way.While the belts are still loose on the drive, rotate thedrive until all the slack is on one side. Then increasethe center distance until the belts are snug. The driveis now ready for tensioning. Keep takeup rails, motorbase or other means of center distance adjustment freeof dirt, rust and grit. Lubricate adjusting screws andslide rails from time to time.Start the drive and continue to adjust until the beltshave only a slight bow on the slack side of the drivewhile operating under load. (See Figure 4).FIGURE 3CORD TIEDTO SHAFTCORD TOUCHING SHEAVES ATPOINTS INDICATED BY ARROWSVI. MOTOR1. Inspection:Inspect motor at regular intervals. Keep motor cleanand ventilation openings clear.2. Lubrication:Ball bearing motors are adequately lubricated at thefactory. Relubrication at intervals consistent with thetype of service will provide maximum bearing life.Excessive or too frequent lubrication may damagethe motor.Motors having pipe plugs or grease fittings in bear-ing housings should be relubricated while warm andat stand–still. Replace one pipe plug on each endshield with 1/8 " pipe thread lubrication fitting.Remove the other plug for grease relief. Be sure fit-tings are clean and free from dirt. Using a lowpressure grease gun, pump in the recommendedgrease until new grease appears at grease reliefhole. After relubricating, allow motor to run for 10minutes before replacing relief plugs.Motors not having pipe plugs or grease fittings inbearing housing can be relubricated by removingend shields from motor, cleaning grease cavity andrefilling the cavity with recommended grease. CAU-TION: Bearings and grease must be kept free of dirt.VII. IMPELLERBefore attempting to replace an impeller, be sure thatthe main electrical disconnect switch is locked in thepower “off” position.Remove the fan from the system and proceed as out-lined below.Centrifugal FansMeasure the gap between the impeller and inlet cone.This is important to assure proper performance afterreassembly.Remove fan housing from base.Mark the location of the taper lock on the shaft.Remove cap screws from bushing/hub and place inthreaded holes in the bushing. Tighten these capscrews by turning each part. Turn cap screws in suc-cession until the impeller is forced off the bushing.To assemble new impeller, reverse above procedure.To center impeller to correct gap as measured above,it is necessary to be sure bushing is in exact locationon shaft that it was before dis–assembly.The impeller should be repaired only by a factoryauthorized repairman in our factory. This will assurethat the repairs are correct and that the impeller isbalanced.Axial FansFor axial fans the following procedure applies:For removable bearing assembly, see Section VIII.If the fan does not have the removable bearingassembly proceed as follows:Loosen set screws on locking collars on the bearings.Mark shaft location with respect to bearings. Removepulley from shaft (see”Sheave” section).Slide impeller/shaft assembly out of fan.To remove the impeller from the shaft, grind away theFRP that encapsulates the shaft at the rear of theimpeller.Cut away the flat FRP plate on the front of the impellerto expose the taper–lock bushing. Remove the taperlock as described in the centrifugal section above.Assembly of the impeller and installation of the shaftand impeller is the reverse of the above. Care must betaken to overwrap with FRP the shaft and hub, plusencapsulate the access to the taperlock.The impeller should be repaired only by a factoryauthorized repairman in our factory. This will assurethat the repairs are correct and that the impeller isbalanced.7FIGURE 4SLIGHT BOWTOO TIGHTTOO LOOSE8VII. REMOVABLE BEARING ASSEMBLY (Optionalon Axial Fans)Flange Type Bearings:1. Remove access door.2. Unbolt front coverplate and rear flange bearing.3. Remove pulley from shaft.4. Pull out impeller, front cover plate, shaft andbearings.5. Remove shaft from bearings.Assemble New Flange Bearings:1. Clean up shaft, remove all setscrew burrs. Replaceshaft if necessary.2. Check front cover plate gasket and replace with 1/4"thick foam neoprene gasket if necessary. (Do notuse solid rubber gasket thicker than 1/16" .)3. Check shaft grease seal and renew if necessary.4. Attach new bearing to coverplate, hand tight only.5. Slide shaft through coverplate and assemble rearbearing.6. Insert assembly into fan. Leave approximately 1/16 "gap between impeller and drive housing.7. Align impeller and shaft with fan centerline andtighten bearing bolts.8. Re–assemble pulley (see belt section).9. Test run.Pillow Block Bearings:1. Remove access door.2. Unbolt front cover plate and bearing base at drivebearing bracket.3. Pull out impeller, front cover plate, shaft, and bear-ing base with pillow blocks.4. Remove bearing base from assembly.5. Pull bearings from shaft.Assemble New Pillow Block Bearings:1. Clean up shaft, remove all setscrew burrs. Replaceshaft if necessary.2. Check front cover plate gasket and replace with 1/4"thick foam neoprene gasket if necessary. (Do notuse solid rubber gasket thicker than 1/16" .)3. Check shaft grease seal and renew if necessary.4. Assemble bearing plate to front cover plate.5. Assemble front cover plate to drive housing andbearing plate to drive bearing bracket, tighten allnuts.6. Assemble new pillow blocks to bearing base, installexpansion bearing near front cover plate, installnon–expansion bearing near drive bearing brake,tighten nuts hand tight only.7. Assemble impeller with shaft, leaving approximately1/4" gap between impeller rim and drive housing.8. Align impeller and shaft with fan centerline andtighten bearing bolts.9. Assemble drive and test run.IX. HOUSINGShould the housing need to be repaired it is preferableto have an authorized repairman perform the work. Thisis essential when repairs are made that could affect thefit up between the impeller and the housing.GENERAL TERMSOF SALEI. TERMS AND CONDITIONSDefective Goods. Providing buyer notifies Sellerpromptly, in writing, if , within one (1) year from date ofshipment, goods or parts manufactured by Seller failto function properly under normal and proper use andservice because of defects in material or workmanshipdemonstrated to Seller’s satisfaction to have existedat the time of delivery. Seller, reserving the right toeither inspect them in Buyer’s hands or request theirreturn to Seller, will, at Seller’s option repair or replaceat Seller’s expense F.O.B Seller’s point of manufac-ture, or give Buyer proper credit for such goods, or partsdetermined by seller to be defective, with all disman-tling and reassembly and necessary packaging andtransportation costs to be assumed by Buyer. Theforegoing shall not apply to goods that shall have beenaltered or repaired after shipment to Buyer by anyoneexcept Seller’s authorized employees, And Seller willnot be liable in any event for alterations or repairs, ex-cept those made with its written consent. Buyer shallbe solely responsible for determining suitability for useand Seller shall in no event be liable in this respect.The goods or parts manufactured by others but furnish-ed by Seller will be repaired or replaced only to the ex-tent of the original manufacture’s guarantee.THE FOREGOING OBLIGATIONS ARE IN LIEU OFALL OTHER OBLIGATIONS AND LIABILITIES IN-CLUDING NEGLIGENCE AND ALL WARRANTIES OFFITNESS OR MERCHANTABILITY OR OTHERWISEEXPRESSED OR IMPLIED IN FACT OR BY LAW, ANDSTATE SELLER’S ENTIRE AND EXCLUSIVE LIABILI-TY AND BUYER’S EXCLUSIVE REMEDY FOR ANYCLAIM OF DAMAGES IN CONNECTION WITH THESALE OR FURNISHING OF GOODS OR PARS ORSERVICES, THEIR DESIGN, SUITABILITY FOR USE,INSTALLATION OR OPERATION. Seller will in noevent be liable for any direct, indirect, special, inciden-tal or consequential damages or losses whatsoever,and Seller’s liability under no circumstances will exceedthe contract price for the goods or parts for which liabil-ity is claimed.No employee or agent of Seller is authorized to makeany warranty other than that which is specifically setforth herein. The provisions in any specification or chartissued by Seller or attached hereto are descriptive on-ly and are not warranties or representations. Seller willcertify to a rated capacity in any particular goods uponrequest.II. RETURNED OR REJECTED GOODSGood may be returned only when specifically authoriz-ed and Buyer will be charged for placing returnedgoods in saleable conditions, any sales expenses thenincurred by Seller, plus a restocking charge and anyoutgoing and incoming transportation costs whichSeller pays, If Buyer rejects andy goods supplied pur-suant to Buyer’s purchase order, Buyer must notifySeller of such rejection withing thirty (30) days of delivery.Any failure to make such notification constitutes accept-ance of the goods.III. PROPRIETARY DATAUnless otherwise specifically agreed to in writing signedby an authorized officer, neither Buyer nor anyrepresentative of Buyer, nor any other person, shallhave any right to examine any manufacturing,engineering or production prints, drawings or technicaldata which Seller, in Seller’s sole discretion, may con-sider in whole or in part proprietary to Seller.Unless specifically agreed in writing. Seller does notwarrant or represent that any of its goods bythemselves or in a system with other goods will con-form to or comply with the provision of the Occupa-tional Safety and Health Act of 1970 and the standardsand regulations issued thereunder, or any otherFederal, State or Local Law or Regulation of the sameor similar nature.9mrusnakCalloutSpread across top as one line centered over 2 columns www.verantis.comVERANTISE n v i r o n m e n t a l S o l u t i o n s G r o u pProducts and Services of Verantis Corporation Please visit our website at www.verantis.comor email sales@verantis.com To find the name of the representative nearest you,please visit our website at www.verantis.comor email sales@verantis.com ? Wet Scrubbers & Systems ? Ionizing Wet Scrubbers (IWS systems) ®? Fans – Fiberglass Reinforced Plastic ? Tellerette Tower Packing ®? Gas Absorption Towers ? Mist Eliminators ? Chlorine Spill Control ? Turnkey Installations ? Odor Control Systems ? System Design & Fabrication ? VOC Recovery Systems ? Cooling/Condensing Towers ? Quenches ? Strippers ? Pilot Testing ? Installation Supervision Verantis Corporation has a network of qualified representatives in the U.S. and Canada ready to serve you. Answers to your air pollution control needs are only a phone call away. Strong product/system support is an integral part of Verantis Corporation’s resource capabilities. We are broadly experienced in the design, engineering and installation of a wide range of air pollution control equipment and systems. We will undertake contracts ranging from consulting to complete green field turnkey jobs.