Bard 2100-066 Rev. A - Manual (Page 14)

3. Motor bearings with oil cups or holes. Add a few drops of
automotive 10 nondetergent oil.
□ Check blower wheel bearings for wear.
1. Grasp blower pulley and move in up and down directions.
Also push in and out. There should be no movement in any
direction if the pulley is mounted tightly to the blower shaft.
2. Grasp shaft and test bearings on opposite side of blower
wheel. There should be no movement.
3. If there is in and out movement on either side, move locking
collars on the affected side closer to bearing as follows:
On the pulley side, loosen set screw on shaft and
remove pulley.
Loosen collar set screw and move collar snugly against
bearing housing. Tighten collar setscrew.
4. If there is still movement, bearings are worn. Inform
customer of bearing condition. If problem is severe, blower
bearings should be replaced. Notify service manager.
□ Lubricate blower wheel bearings.
1. Bearings with no lubricant fittings. These are permanently
sealed and lubricated and require no service.
2. Bearings with grease cups, Turn grease cup down
approximately one turn yearly. When cups are turned to the
bottom, refill with lubricant.
Bearings with grease plugs. These are normally prelubricated
and require lubrication about every two years. If lubricant is
required, use No. 2 neutral mineral grease. Check lubrication
instruction.
□ Clean blower and compartment.
1. Remove dirt from air scoops or vanes of blower wheel. This
may be done with moist rag or vacuum.
2. If blower is excessively dirty, it should be removed and
thoroughly washed/cleaned using high pressure hose.
Remove motor from blower assembly before washing blower.
Make sure motor is completely dry before it is put back into
operation.
□ Check blower wheel for free and balanced rotation.
1. Spin wheel. If wheel is badly out of balance or hits against
housing, blower should be replaced.
2. If dislodged balance weights are found, place them in exact
location they formerly occupied. Look for scratches on blades
to show where weight clip was attached.
When wheel is spun, the heavier side will fall to bottom, This
means the side minus the weight is probably on top. If old
location cannot be found, leave weights off rather than risk
further imbalance by incorrect placement,
3. If blower was removed from unit for cleaning, reinstall at
this time.
□ Check pulley alignment,
1, Cheek alignment by placing a straight rod across grooves of
the motor and blower pulleys.
2. If grooves of pulleys do not line up, loosen shaft setscrew and
move motor pulley until it is aligned with blower pulley,
3. Tighten motor pulley setscrew and recheck alignment.
□ Check motor and blower pulley setscrews for tightness.
An adjustable motor pulley has two setscrews, one to tighten
the adjustable pulley sheave and one to tighten the pulley to
the motor shaft.
Set screw to tighten
pulley on motor shaft
Set screw to tighten
adjustable sheave
□ Put belt back on blower and motor pulleys and check
belt tension.
1. Place belt around pulleys.
2. Adjust motor mount to tighten belt.
3. Check tension by pushing down on belt halfway between
pulleys. Belt should move or deflect from 3/4" to 1".
4. When proper tension is obtained, tighten adjustable motor
mount.
□ Check all blower housing and motor mounts for tightness.
Post-Service Checks
□ Return theimostat(s) to original setting(s) recorded at beginning
of service call,
□ Leave copy of completed check sheet with customer.
□ Power on before leaving.
1. Be sure unit disconnect has been turned on before leaving to
avoid a needless, time consuming callback.
□ Leave all service areas neat and clean.
Heat Section Checks
These are discussed individually, according to type of fuel used, in
the next sections.
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