91
Supply Fans
Lubrication
All original fan motors and bearings are
furnished with factory lubrication. Some
applications will require that bearings be re-
lubricated periodically. The schedule will
depend on the operating duty, temperature
variations or other severe atmospheric
conditions.
Bearings should be re-lubricated when at
normal operating temperatures, but not
running. Rotate the fan shaft by hand and
add only enough grease to purge the seals.
DO NOT OVERLUBRICATE.
Recommended greases are:
SHELL OIL - DOLIUM R
CHEVRON OIL - SRI No. 2
TEXACO INC. - PREMIUM RB
Removal (6-25 and 30 tons)
Remove fan access panel. Panel is attached
with eight 3/8” bolts.
Remove the wire connections from
Auxiliary Limit Switch (if applicable) which
is mounted in the brace at the fan opening.
Remove the brace located at the fan
opening.
Remove the six bolts that connect the motor
mount to the blower frame. Two bolts are on
the angle on the back of the motor mount
box, two are on the bottom inside the motor
mount box and two are on the inside front of
the motor mount box.
Figure 47 - 9-25 and 30 ton Supply Fan
Figure 48 - Bolts which Connect Motor
Mount to Blower Fan
Slide the motor mount back away from the
air inlet, so that the blower wheel is clear of
the inlet. A screw driver or crowbar can be
Blower wheels and bands must be
inspected for excessive dust build up
periodically and cleaned if required.
Excessive dust build up on blower
wheels may cause an unbalanced
state; leading to vibration and/or
component failure. Damages due to
excessive dust build up will not be
covered under factory warranty.
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
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