FloAire Indirect Fired Heater - Manual (Page 26)

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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.
Filter Quantity Chart
Intake 16” x 20” 20” x 25”
Size 1 Sloped 3
Size 2 Sloped 3
Size 3 Sloped 6
Size 1 V-Bank 3
Size 2 V-Bank 8
Size 3 V-Bank 8
Yearly
1. Inspect bearings for wear and deterioration. Replace if necessary.
2. Inspect belt wear and replace torn or worn belts.
3. Inspect bolts and set screws for tightness. Tighten as necessary.
4. Inspect motor for cleanliness. Clean exterior surfaces only. Remove dust and grease from the
motor housing to ensure proper motor cooling. Remove dirt and grease from the wheel and
housing to prevent imbalance and damage.
5. The heat exchanger should be checked for cracks. The heat exchanger should be replaced
immediately if cracks are detected.
6. Inspect the combustion blower motor for cleanliness. Clean exterior surfaces of the combustion
blower motor only. Removing excess dust and grease guarantees proper motor cooling.
7. Before each heating season, examine the burner and gas orifices. Remove and inspect burner,
burner ports, bottom of heat exchanger, and pilot assembly for cleanliness.