MAINTENANCE CAUTIONS
1.
Before performing any maintenance on the fan, be sure power is locked
OFF
at the service entrance.
2.
When removing or installing a belt,
do not
force the belt over the sheave. Loosen the motor mount bolts so the belt
can be easily slipped over the sheave.
3.
Do not readjust blade pitch or fan rpm. If sheaves are replaced
use only
identical size and type.
All motors supplied with Carnes fans carry a one year warranty from the date of shipment. For repairs within warranty
period, the motor must be taken to the motor manufacturer’s authorized service dealer. Contact your Carnes
Representative for additional warranty details.
If a belt driven fan is to be left idle for an extended period (especially over summer months), it is recommended that the
belt(s) be removed and stored in a cool, dry place to avoid premature belt failure.
MAINTENANCE
All fans must be carefully checked
at least
once a year. For critical or rugged applications, a check
should be done
every
2 or 3 months. Lock power
OFF
before performing any maintenance.
1.
A motor check consists of spinning the motor shaft with the power locked
OFF
to be sure the motor turns freely and
the bearings run smoothly. On belt drive units the belt must be removed.
2.
The belt on belt driven units should be checked for cracks, ply separation or irregular wear. Problems in the belt will
result in noisy operation. If the belt has any of these defects it should be replaced.
3.
Check the sheaves for any chipping, dents or rough surfaces which could damage the belt.
4.
The belt alignment should be checked to make sure the belt is running squarely on the sheaves. Motor shaft and fan
shaft must be parallel. Improper alignment will result in excessive belt wear.
5.
Check sheave set screws for tightness. Proper locking keys must be in keyways.
6.
Check propeller set screws for tightness. Proper locking keys must be in key ways.
7.
Check fan shaft bearings:
• All
units
- Check the shaft set screws for tightness. Check the bearing mounting bolts for tightness.
• Smaller
units
- Bearings are permanently lubricated and sealed at the factory.
• Larger units (with grease fittings)
- Bearings are factory lubricated and require relubrication annually or more frequently if operated under dirty, damp
or high temperature conditions.
- Use #2 lithium grease or equivalent.
• Use a hand operated grease gun and give each bearing 1 or 2 pumps.
8.
Check belt tension. Belt should not feel tight. A very slight squeal on fan startup is OK.
2
Mount Belts Straight
Shafts must be parallel and
sheaves in alignment to pre-
vent rapid belt wear.
