FloAire Modular Packaged Unit - Manual (Page 21)

21
MAINTENANCE
To guarantee trouble free operation of this unit, 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 UNIT UNTIL THE
ELECTRICAL SUPPLY HAS BEEN COMPLETELY DISCONNECTED AND THE
MAIN GAS SUPPLY VALVE (IF REQUIRED) HAS BEEN TURNED OFF.
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 and
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 performed 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.
5. Do not block or cover airflow to condensing units. Do not allow grass clippings, leaves or other
debris to accumulate on the sides or top of the unit.
6. Do not operate the air conditioning system when the outdoor air is less then 55° F.
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 performed 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.