Twin City Panel Fans & Power Roof Ventilators - ES-200 - Manual (Page 2)

general Motor Maintenance
The three basic rules of motor maintenance are to keep
the motor (1) clean, (2) dry, and (3) properly lubricated.
Blow dust off periodically (with low pressure air) to pre-
vent the motor from overheating.
Some smaller motors are lubricated for life. Motors
less than 10 HP running about eight hours a day in a
clean environment should be lubricated once every five
years; motors 15 to 40 HP, every 3 years; and motors
50 to 150 HP, yearly. For motors in dusty or dirty envi-
ronments or running 24 hours a day, divide the service
interval by 2. If the environment is very dirty or high
temperatures exist, divide the service interval by 4.
Lubrication requirements are normally attached to the
motor. Do not over-lubricate.
Drive Maintenance
V-belt drives need periodic inspection and occasional
belt replacement. When inspecting drives, look for dirt
buildup, burrs or obstructions which can cause prema-
ture belt or drive replacement. If burrs are found, use
fine emery cloth or a stone to remove the burr. Be
careful that dust does not enter the bearings.
Check sheaves for wear. Excessive slippage of belts
on sheaves can cause wear and vibration. Replace worn
sheaves with new ones. Carefully align sheaves to avoid
premature sheave failure.
Observe belts for wear. If fraying or other wear is
observed to be mostly on one side of the belts, the
drives may be misaligned. Re-install the drives according
to the following instructions:
1. Slip (do not pound) the proper sheave onto the cor-
responding shaft. caUtIon: PlacIng the Fan
SheaVe on the MotoR can oVeRSPeeD the
Wheel anD caUSe StRUctURal FaIlURe.
2. Align sheaves with a straightedge extended along the
sheaves, just making contact in two places on the
outside perimeters of both sheaves.
3. Tighten down sheave bolts.
4. Install a matched set of bolts. Slide the motor to
obtain slack and tighten the belts. Using a pry will
damage the belts.
5. Tighten the belts to the proper belt tension. Ideal
tension is just enough tension so that belts do not
slip under peak load. Recheck sheave alignment.
6. After initial installation of the belts, recheck the belt
tension after a few days and adjust it if necessary.
(New belts require a break-in period of operation.)
Never use belt dressing on any belts.
Bearing Maintenance
Proper lubrication of belt drive bearings helps assure
maximum bearing life. All fans are equipped with decals
indicating relubrication intervals for normal operating
conditions. However, every installation is different and
the frequency of relubrication should be established
accordingly. Observation of the condition of the grease
expelled from the bearings at the time of relubrication
is the best guide as to whether regreasing intervals and
amount of grease added should be altered.
Greases are made with different bases. There are
synthetic base greases, lithium base, sodium base, etc.
Avoid mixing greases with different bases. They could
be incompatible and result in rapid deterioration or
breaking down of the grease.
All bearings are filled with lithium grease before leav-
ing the factory. When the fans are started, the bearings
may discharge excess grease through the seals for a
short period of time. Do not replace the initial discharge
because leakage will cease when the excess grease has
worked out. The bearings may run hotter during this
period but temperatures should recede within 48
hours.
When relubricating, use a sufficient amount of grease
to purge the seals. Rotate bearings by hand during
relubrication.
operation checklist
Safety Precautions
□ Verify that proper safety precautions have been followed.
□ All electrical power is locked off.
Fan Mechanism components are Ready
□ Nuts, bolts and setscrews are tight.
□ Mounting connections are properly made and tight-
ened.
□ Bearings are properly lubricated.
□ Wheel, drives and fan surfaces are clean and free of
debris.
□ Rotating assembly turns freely by hand.
□ Drives are on correct shafts, properly aligned, and
properly tensioned.
Fan electrical components are Ready
□ Motor is wired for proper supply voltage.
□ Motor was properly sized for power of rotating assem-
bly.
□ Motor is properly grounded.
□ All leads are properly insulated.
trial “Bump”: turn on power just long enough to start
assembly rotating.
□ Check rotation for agreement with rotation arrow.
□ Listen for any unusual noise.
□ Run unit up to speed.
□ Bearing temperatures are acceptable after one to two
hours of operation (< 150°F).
□ Vibration levels are acceptable.
after one Week of operation
□ Check all nuts, bolts and setscrews and retighten if
necessary.
□ Readjust drive tension if necessary.
1MSS8/10
Twin ciTy fan & blower | www.Tcf.com
5959 Trenton Lane N | Minneapolis, MN 55442 | Phone: 763-551-7600 | Fax: 763-551-7601