1385, boul. Lionel-Boulet, Varennes, Québec J3X 1P7 Toll Free: 1 888 514-8007
•
Tel: 438 338-1101
•
Fax: 450 922-5900
www.nagasinnovation.com
28
of
35
Belt Deflection: Allow 1/64” (0.4 mm) of deflection for each 1” (25.4 mm) of span length.
Figure 8: Belt deflection
NOTICE
If belts are too tight or improperly aligned, the life expectancy of the motor(s), fan bearings and belt(s)
are reduced.
9.3.
Set screws
Check set screws on fan wheel, fan bearings, fan and motor pulleys for looseness on the shaft. Tighten where
required.
NOTICE
IT IS IMPORTANT TO PERFORM THIS CHECK BEFORE INITIAL START-UP, AFTER A RUN-IN PERIOD OF 2
WEEKS AND THEN ON 4 MONTH INTERVALS.
CAUTION!
OVERTIGHTENING SET SCREWS CAN DAMAGE BEARINGS.
9.4.
Bearing lubrication
Fan bearings:
Some fans, depending on equipment model and size, have permanently lubricated sealed ball bearings
which should not require lubrication. These bearings are factory packed 30 to 50% full.
Lubricate bearings prior to extended shutdown or storage and rotate shaft monthly to aid corrosion
protection.
NOTICE
Bearings that require lubrication should be greased while the bearing is rotating slowly.
CAUTION!
DO NOT OVERGREASE AND DO NOT USE NON-LITHIUM BASED GREASE.
Motor bearings:
Refer to motor manufacturer literature for lubrication recommendations.
9.5.
Vent terminals
The vent terminal should be checked and cleaned every fall. If the terminal is found to have accumulations
of leaves or other debris, clean more often as necessary.