Maintenance
The following checklist describes the suggested maintenance
schedule to maintain proper operation of the unit. Detailed
procedures for owner operator maintenance checks are given
after the checklist.
Belts have acquired their permanent stretch. Re-adjust but do
not overtighten.
Observe unit weekly for any change in running condition and
any unusual noise.
Checks air filters. Clean or replace if clogged or dirty. Change
bag filters when pressure drop is 1-inch W.G.
Periodic Maintenance Checklist
After 48 Hours Operation
Weekly
Every Month or Weekly
Every Three to Six Months
WARNING
Disconnect electrical power and allow rotating parts to
stop before servicing the unit. Exercise caution if unit
must be on for test or maintenance procedures. Failure
to do so may result in injury or death from electrical
shock or moving parts.
IMPORTANT
Small & Medium size fans are furnished shielded
bearings. The bearings are lubricated for life and
maintenance free. If re-lubrication is necessary, on
larger fans it is recommended to use a lithium base
grease suitable for all temperatures within the
operational limits.
WARNING
Disconnect electrical power prior to access into fan or
ductwork. Even when locked out electrically, fans may
cause injury or damage if the impeller is subject to
"wind milling". The impeller should be secured to
physically restrict rotational movement can cause
severe personal injury or death.
Check greasing on fan motor.
Align fan and motor sheaves (pulley). Tighten sheaves
setscrews to the proper torque.
Check and adjust fan belt tension.
Tighten electrical connection.
Inspect coils for dirt build-up or coil freeze-up.
Every Year
Inspect the unit casing for corrosion. If damage is found,
clean and re-paint the surface with a rust-resistant primer
and vinyl chlorinated lacquer.
Clean the fan wheels and fan shaft. Remove rust with
emery cloth and apply a coat of LPS#3 or an equivalent.
Inspect the condensate drain pan and drain line, remove
sludge or foreign materials that might obstruct proper
drainage. Remove obstacles.
Check damper linkage, set-screws and blade adjustment
for proper damper operation.
Inspect the control and power box wiring for secure
connections and insulation.
Rotate the fan wheel and check for obstruction in the fan
housing. The wheel should not rub on the fan housing.
Adjust the center if necessary and tighten wheel
setscrews to the proper torque.
Check condition of gasketing and insulation around the
unit, door and damper.
Examine flex connections for cracks or leaks. Repair or
replace damage material.
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