FloAire NSA - Manual (Page 16)

16
MAINTENANCE
To guarantee trouble free operation of this fan, the manufacturer suggests following these guidelines.
Most problems associated with fan failures are directly related to poor service and maintenance.
Please record any maintenance or service performed on this fan in the documentation section located at
the end of this manual.
WARNING: DO NOT ATTEMPT MAINTENANCE ON THE FAN UNTIL THE
ELECTRICAL SUPPLY HAS BEEN COMPLETELY DISCONNECTED
General Maintenance
1. Fan inlet and approaches to ventilator should be kept clean and free from any obstruction.
2. Motors are normally permanently lubricated. Check bearings periodically. If they have grease
fittings lubricate each season. Use caution when lubricating bearings, wipe the fittings clean, the
unit should be rotated by hand while lubricating. Caution: Use care when touching the exterior
of an operating motor. Motors normally run hot and may be hot enough to be painful or
cause injury.
3. All fasteners should be checked for tightness each time maintenance checks are preformed prior
to restarting unit.
4. Blowers require very little attention when moving clean air. Occasionally oil and dust may
accumulate causing imbalance. If the fan is installed in a corrosive or dirty atmosphere,
periodically inspect and clean the wheel, inlet and other moving parts to ensure smooth and safe
operation.
2 weeks after startup
1. Belt tension should be checked after the first 2 weeks of fan operation. Belts tend to stretch and
settle into pulleys after an initial start-up sequence. Do not tension belts by changing the
setting of the motor pulley, this will change the fan speed and may damage the motor. To re-
tension belts, turn the power to the fan motor OFF. Loosen the fasteners that hold the blower
scroll plate to the blower. Rotate the motor to the left or right to adjust the belt tension. Belt
tension should be adjusted to allow 1/64” of deflection per inch of belt span. Exercise extreme
care when adjusting V-belts as not to misalign pulleys. Any misalignment will cause a sharp
reduction in belt life and produce squeaky noises. Over-tightening will cause excessive belt and
bearing wear as well as noise. Too little tension will cause slippage at startup and uneven wear.
Whenever belts are removed or installed, never force belts over pulleys without loosening
motor first to relieve belt tension. When replacing belts, use the same type as supplied by the
manufacturer. On units shipped with double groove pulleys, matched belts should always be
used.
2. All fasteners should be checked for tightness each time maintenance checks are preformed prior
to restarting unit.
Every 3 months
1. Belt tension should be checked quarterly. See instructions in the previous maintenance section.
Over-tightening will cause excessive bearing wear and noise. Too little tension will cause
slippage at startup and uneven wear.
2. Filters need to be cleaned and/or replaced quarterly, and more often in severe conditions.
Washable filters can be washed in warm soapy water. When re-installing filters, be sure to install
with the airflow in the correct direction as indicated on the filter.