Installation Guide

V-BELTS:
V-belts on S&P belt drive fans are oil, heat and static resistant type, and oversized for continuous duty. With proper
installation and maintenance, years of operating efciency can be added to the life span of the V-belt drive.
The condition of V-belts and the amount of belt tension should be checked prior to start-up. When it becomes
necessary to adjust belt tension, do not over-tighten as bearing damage will occur. Recommended belt tension should
permit 1/64” per inch of span deection of the belt on each side of the belt measure half-way between the pulley
centerline. Extreme care must be exercised when adjusting V-belt as not to misalign the pulleys. Any misalignment
will cause a sharp reduction in belt life and will also produce squeaky, annoying noises. On units equipped with 2 or 3
groove pulleys, adjustments must be made so that there is equal tension on all belts.
1. Where tensioning rods are not provided, adjustment is easily obtained by loosening and adjusting one side of
the motor bracket at a time.
2. Always loosen tension adjustment enough to place belts on sheaves without running belts over the edge of
either sheave. A new belt may be seriously damaged internally by careless handling.
WARNING: Whenever belts are removed or installed, never force belts over pulleys without loosening motor rst to
relieve belt tension. The fan has been checked at the factory prior to shipment for mechanical noises. If mechanical
noise should develop, some suggestions are offered as a guide to remedy the cause:
1. Check rotating members for adequate clearance.
2. Check proper belt tension and pulley alignment.
3. Check installation and anchoring
4. Check fan bearings
MOTORS:
The fundamental principle of electrical maintenance is KEEP THE MOTOR CLEAN AND DRY. This requires periodic
inspection of the motor. The frequency depends upon type of motor and the service.
We recommend periodic checks of voltage, frequency, and current of a motor while in operation. Such checks assure
the correctness of frequency and voltage applied to the motor, and yield an indication of the fan load. Comparison
of this data with previous data will give an indication of the fan performance. Any serious deviations should be
investigated and corrected.
Fractional motors usually have prelubricated sealed bearings with no grease ttings and are lubricated for life.
Lubricate integral horsepower motors per the motor manufacturer’s recommendations. Lubrication frequency depends
on the motor horsepower, speed, and service. Use compatible greases.
1. All motors carry a one (1) year warranty from date of shipment. For repairs within the warranty period, the
motor must be taken to the motor manufacturer’s authorized service dealer. Contact your representative for
additional warranty details.
2. A periodic motor check should consist of spinning the motor shaft with the power off to be sure the motor turns
5
Adjust
Variable
Pitch
Sheaves
Properly
Tw o-groove variable pitch sheaves
must be opened the same number of
turns on both sides, otherwise slippage
is induced, wearing belts rapidly.
Shafts must be parallel and sheaves in
alignment to prevent unnecessary belt
wear.
Mount Belts Straight
Eliminate Slack
Slack belts wear excessively, cause
slippage and deliver less power. For
longest belt life, always provide proper
tension.
NOT THIS
Don’t Force Belt
Loosen the motor so that the belt can
be slipped on sheave easily. Forcing
the belt will break the cords and cause
early belt failure.
BELT SPAN
DEFLECTION
DEFLECTION =
BELT
SPAN
54