Fume Exhaust Fans
15
Wheel and Fastener Maintenance
Wheels require very little attention when exhausting
clean air, however, air heavily laden with grease or
dirt will tend to accumulate on the wheel causing
unbalance. Wheels exhausting dirty or grease-laden air
require frequent cleaning to assure smooth and safe
operation.
All fasteners, including set screws in the bearing collars,
should be checked for tightness each time maintenance
checks are performed.
A proper maintenance program will help preserve the
performance and reliability designed into the fan.
Field Adjustable Nozzle
When ordered with an adjustable nozzle, the fume
exhaust system will arrive at the job site with the nozzle
preset at the factory based on the order. Depending on
installed air performance, this nozzle can be adjusted in
the field to accommodate the building situation.
To increase the exhaust velocity and plume height,
close the adjustable nozzle when possible. Verify the
fan speed and motor horsepower to ensure system can
manage the increased pressure the fan must overcome
To lower velocity and decrease plume height, open the
adjustable nozzle.
To modify the area on the field adjustable nozzle,
remove the bolts from each side and move the plate to
the desired position. Bolts are to be located in the same
hole on each side of the plate, but each plate can be
adjusted independently. Replace the bolt and tighten.
After any change, verify the system exhaust for proper
amount of air volume being exhausted.
Pre-drilled adjustment holes
available for increasing or
decreasing outlet area.
