8
If belt tensioning is required, proceed as follows:
1. Loosen the lock nut on the Motor Base Adjusting
Screw (see Figure 4 & 5).
2. Turn the Motor Base Adjusting Screw clockwise to
tension the belt, or counterclockwise to relieve belt
tension. During adjustment of belt tension, the drives
should be rotated several times by hand to evenly
distribute the tension throughout the belt.
3. When the belt is properly tensioned, retighten the
locking nut on the Motor Base Adjusting Screw.
NOTE: There should be no “chirp” or “squeal” when the
fan motor is started.
The drive alignment should be checked annually to
ensure maximum belt life. This can be done by placing
a straight edge across the driver and driven sheaves as
shown in Figure 7a for standard drives and in Figure 7b
for ENERGY-MISER
®
Fan System drives. When the drives
are properly aligned, the straight edge will contact all four
points as indicated. There should be no more than 1/16"
deviation from four point contact. If realignment is neces-
sary, loosen the motor sheave and align it with the fan
sheave. Allow approximately 1/4" for draw-up as the
bushing screw is retightened.
Figure 6b
Figure 7a — Standard Drives
Figure 7b — ENERGY-MISER
®
Fan System Drives
Corrosion Protection
The Series 3000 and Series 1500 Cooling Towers are con-
structed of corrosion-resistant materials. The wet deck sur-
face is made of an inert synthetic material, which requires
no protection against rot, decay, rust or biological attack.
Other materials used in construction of the equipment,
which are listed below, should be inspected regularly.
Galvanized steel components
Galvanized steel components should be inspected for
blemishes or corrosion. Affected areas should be wire
brushed and recoated with a cold galvanizing compound
such as ZRC.
BALTIBOND
®
Corrosion Protection System
Components
Galvanized steel components protected with the
BALTIBOND
®
Corrosion Protection System may develop
scratches, scrapes or blemishes. These may be touched
up with a repair kit (B.A.C. Part No. 16-133P). In the
unlikely event that the damage is more extensive than
simple scratches or minor blemishes, contact your local
B.A.C. Representative.
Stainless Steel Components
Stainless steel components should be inspected for signs
of blemishes or corrosion and cleaned with stainless steel
wool as necessary. If more extensive corrosion is preva-
lent, contact your local B.A.C. Representative.
Fiberglass Re-Inforced Polyester (FRP) Components
Series 3000 and Series 1500 Cooling Towers are provided
with FRP casing panels and air inlet louvers as standard.
These components should be inspected for accumulation
of dirt and cleaned with soap and water as necessary.
