background image

Utility Fans

15

For Arrangement 10

The intent of this procedure is to allow a field service 
technician to replace bearings with the fan remaining 
in place in its intended application. All work can 
be conducted by accessing the bearings by either 
removing a shaft guard, a weatherhood or working 
under a weatherhood. This is dependent on the size 
of the unit. This procedure assumes the power source 
has been locked out prior to removing guards and 
covers, belts and pulleys have been loosened and 
removed properly, and extended lubrication lines have 
been disconnected at the bearing. In some cases, 
it may be necessary to remove the fan inlet cone 
and wheel if the bearings cannot be removed due to 
corrosion or damage. See Radial Gap, Overlap and 
Wheel Alignment on page 10 to the realign wheel 
upon installation.

Bearing Removal

This procedure assumes proper safety measures have 
been taken.

•  Read and follow all instructions carefully.

•  Disconnect and lockout power before installation 

and maintenance.

•  Driven sheaves and belts have already been 

removed.

•  Shaft black coating can be removed with a solvent 

similar to a brake/carburetor cleaner.

1.  Scribe a line around the shaft by both bearings and 

around the bearing base to the bearing support or 
write down the measurement from the end of the 
shaft to the bearings. This will help in repositioning 
the new bearing and wheel cone overlap.

2.  Follow the bearing manufacturers’ procedures for 

removal and installation.

3.  Before removing the bearing bolts, make sure the 

shaft is supported slightly. Remember to consider 
the wheel weight on the shaft.

4.  Remove both bearings from the shaft and clean/

remove any burrs using an emery cloth or file.

5.  Clean mounting surface of any dirt or grease.

Bearing Installation

  1.  Before installing, read bearing manufacturers’ 

procedures. Before putting the new bearings on 
the shaft, you may need to break what is called 
swivel torque on the bearings (depending on style 
of bearing). This is done by holding the bearing 
housing securely and being able to move the 
inner bearing race around freely.

  2.  Apply light film of oil on shaft, then gently slide 

the new bearings onto the shaft.

 

 

Do not hammer bearing onto shaft!

  3.  Align bearings on shaft with the previous scribe 

marks that are on the shaft and lock bearing to 
shaft.

  4.  Put bolts into mounting surface and bearings. Do 

not tighten.

  5.  Remove blocks if shaft is supported.

  6.  Set bearings on support with the scribed marks 

locating the bearings. Make sure bearings are 
square and level with the shaft.

  7.  Tighten bolts and torque bearing bolts, bearing 

set screws/locking collars as per bearing 
manufacturers’ procedures.

  8.  Rotate shaft by hand to help allow the bearings 

to help set in. At this time, listen for any unusual 
noises such as wheel rubbing on cone and any 
bearing noise.

  9.  Connect extended lube lines in new bearings if 

needed.

 10.  Reinstall the drive sheaves and belts. Check the 

belt alignment.

 11.  Make sure to reinstall all guards and follow proper 

safety measures before starting up the fan.

Bearing Replacement

Summary of Contents for XUEF-100

Page 1: ...s may be required if seismic activity is present If more information is needed contact a licensed professional engineer before moving forward 1 Follow all local electrical and safety codes as well as the National Electrical Code NEC and the National Fire Protection Agency NFPA where applicable Follow the Canadian Electric Code CEC in Canada 2 The rotation of the wheel is critical It must be free t...

Page 2: ...age The manufacturer will not be responsible for damage during storage These suggestions are provided solely as a convenience to the user INDOOR The ideal environment for the storage of fans and accessories is indoors above grade in a low humidity atmosphere which is sealed to prevent the entry of blowing dust rain or snow Temperatures should be evenly maintained between 30 to 110 F 1 to 43 C wide...

Page 3: ...ake sure it is in working order 1 Check all fasteners set screws on the fan wheel bearings drive motor base and accessories for tightness 2 Rotate the fan wheel by hand and assure no parts are rubbing Access to the wheel is obtained through a bolted panel located on the side of the fan housing 3 Ensure proper wheel settings for radial gap and alignment Refer to Radial Gap Overlap and Wheel Alignme...

Page 4: ...t it be operated in a completely level position For further details on safety practices involving industrial and commercial fans please refer to AMCA Publication 410 Electrical Disconnects All fan motors should have disconnects located in close visual proximity to turn off electrical service Service disconnects shall be locked out when maintenance is being performed Moving Parts All moving parts m...

Page 5: ...age which becomes the installer s responsibility Optional Height Savings Bracket For illustration purposes some lifting location images with isolation bases are shown with optional height savings brackets Lift unit using the corner hole located in the isolation base with and without the height savings bracket Isolation Base Isolation Base with Height Savings Bracket XUEFD 100 XUEF 200 and XUEF 300...

Page 6: ...l sizes have field rotatable housings For the XUEF 400 rotatable housings are standard on sizes 30 and less arrangement 10 and Class 0 I and II Removal of the housing bolts allows the discharge to be rotated to the clockwise positions shown above For downblast DB discharge position a portion of the frame angle must be removed Fan rotation is always specified from the drive side of the housing Instal...

Page 7: ... fan with an open inlet too close to a wall or bulkhead will cause reduced fan performance It is desirable to have a minimum of three fourths of a wheel diameter between the fan inlet and the wall Free Discharge Free or abrupt discharge into a plenum results in a reduction in fan performance The effect of discharge static regain is not realized R o t ation R o t ation POOR Length of Straight Duct ...

Page 8: ...nly See the latest edition of NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations for detailed installation instructions materials duct connections and clearances XUEF 300 and 400 models are listed for grease removal UL cUL 762 File no MH11745 Drain Options XUEF D 100 Drain only XUEF 200 None Drain only With plug XUEF 300 None With plug XUEF 400 None With ...

Page 9: ... straight line from sheave to sheave with a slight bow on the slack side Aligning Sheaves with a Straight Edge Field Coating Touch Up Procedure for Scratched Areas Standard coating and color is RAL 7023 Concrete Grey The procedure outlines the correct method for repairing minor scratches in the coating 1 Scuff affected area to be repaired using medium sandpaper provided or medium Scotch Brite pad ...

Page 10: ...he unit and noting if rotation is in the same direction as the airflow at the outlet and conforms to the rotation decal affixed to the unit Wheels as viewed from the drive side Wheel Cone Radial Gap Radial Gap Overlap A Straight Edge Straight Edge Inlet Cone Inlet Cone Backward Inclined Radial Gap Overlap and Wheel Alignment Radial Gap and Overlap Dimensions XUEFD 100 BI A Overlap Overlap Tolerance ...

Page 11: ...blessure grave ou de mort débrancher et verrouiller l alimentation électrique en position Arrêt avant tout contrôle ou entretien Additional Steps for Initial Start Up 1 Check for proper wheel rotation by momentarily energizing the fan Access to view the wheel can be gained through the blower housing access panel One of the most frequently encountered problems are motors that are wired to rotate th...

Page 12: ...ld be removed to prevent unbalance and possible damage 4 Inspect fan impeller and housing looking for fatigue corrosion or wear Fan Operation All fans should be run every thirty 30 days or at least bumped every thirty days It is preferred that each fan is run as this causes all electrical and mechanical components to get up to temperature displacing any formed condensation redistributes load on be...

Page 13: ...sted by raising or lowering the motor pivot plate For initial tensioning the proper belt deflection halfway between sheave centers is 1 64 inch for each inch of belt span Check belt tension two times during the first 24 hours of operation and periodically thereafter Belt Span Deflection Belt Span 64 Wheel and Fastener Maintenance Wheels require very little attention when exhausting clean air however ...

Page 14: ...g and until clean grease is seen purging from the bearing The lubrication interval may be modified based on the condition of the purged grease If bearing is not visible to observe purged grease lubricate with number of shots indicated in chart for bore size For conditions including high temperatures moisture dirt or excessive vibration consult the factory for a specific lubrication interval for your...

Page 15: ...s procedures for removal and installation 3 Before removing the bearing bolts make sure the shaft is supported slightly Remember to consider the wheel weight on the shaft 4 Remove both bearings from the shaft and clean remove any burrs using an emery cloth or file 5 Clean mounting surface of any dirt or grease Bearing Installation 1 Before installing read bearing manufacturers procedures Before put...

Page 16: ...uage de conformité UL Each fan bears a manufacturer s nameplate with model number and serial number embossed This information will assist the local manufacturer s representative and the factory in providing service and replacement parts Before taking any corrective action make certain unit is not capable of operation during repairs XUEFD 100 Motor Wheel Inlet Cone Scroll Housing Motor Bracket Moto...

Page 17: ... Slinger XUEF 300 Rub Ring XUEF 300 Shaft Seal XUEF 300 Fan Shaft Opposite Drive Side Bearing Drive Side Bearing Wheel Inlet Cone Inlet Flange Inlet Companion Flange Grease Container XUEF 300 Grease Fan Brackets XUEF 300 Inlet Guard Shaft Pulley driven Motor Pulley driver Weatherhood Components Optional Accessories ...

Page 18: ... Pulley driven Drive Frame Assembly Motor Adjustable Motor Plate Companion Outlet Flange Punched Outlet Flange Outlet Guard Belt s Scroll Housing Heat Slinger Rub Ring Shaft Seal Fan Shaft Opposite Drive Side Bearing Drive Side Bearing Wheel Inlet Cone Inlet Flange Inlet Companion Flange Inlet Guard Motor Cover ...

Page 19: ...ystem Use correction factor to adjust for temperature altitude Resize ductwork Clean filters coils Change fan speed High Motor Amp Draw Fan Check rotation of wheel Reduce fan speed Duct System Resize ductwork Check proper operation of isolation and bypass dampers Check filters and access doors Fan Doesn t Operate Electrical Supply Check fuses circuit breakers Check for switches turned off or disconn...

Page 20: ..._______________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ Date _______________ Time _______________ AM PM Notes __________________________________________ ________________________________________________ __________________________________________...

Reviews: