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Fan motor unit
Electrical equipment
Thermal wheel heat exchanger
(TWHE)
38
19. Maintenance
Motor and bearing are maintenance-free.
If necessary, clean the impeller with a soapy solution.
Check that the test lead is seated firmly at the test connector on the inlet nozzle.
Please
Loose seating can result in faulty measurements.
note
- Regularly check the electrical equipment of the unit
- Replace loose connections and faulty cables immediately
- Regularly check the earth conductor
In normal operating conditions, the actuator and rotor bearing are maintenance-
free.
Before starting any maintenance work, disconnect the power supply across
all poles and secure against reconnection, so that the persons charged with
maintenance work cannot be exposed to any risk of crushing or abrasion
injuries due to the rotor starting up suddenly if it is switched on unintentionally,
the automatic cleaning run commences or the rotor restarts automatically after
power failure.
Maintenance work (approx. every 3 months or more frequently if required)
- Check rotor accumulator mass for hygienic condition, damage, corrosion,
contamination and foreign bodies, and clean if required. Compressed air (max.
pressure 5 bar) or, for stubborn contamination, a pressure washer (water
only; no chemical additives) may be used for cleaning the rotor accumulator
mass. When cleaning, ensure that the cleaning jet hits the accumulator mass
at an angle of 90°. Remove dirty water carefully.
- Check seals for hygienic condition, contamination and foreign bodies, and
clean if required.
- Check drive belt for wear and tension.
If necessary, have it adjusted or replaced by a contractor or the
manufacturer.
- Check rotor for imbalance and lateral trueness, and balance or realign it if
required.
- Check bearing for impermissible heating, vibration and bearing noise.
If necessary, have it replaced by a contractor or the manufacturer.
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