Helios Explosion-proof Series, Installation And Operating Instructions Manual

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4.0 Inspection and maintenance
– Before any maintenance or inspection work or before opening the terminal compartment, the device is to
be fully isolated from the power supply and secured against unintended restart!
– Excessive deposit of dirt, dust, grease and other materials on the impeller, motor and safety grille especially
between casing and impeller is to be avoided and has to be prevented by periodical cleaning.
– If the fan is used for important functions servicing is necessary at least every 6 months, in case of standstill for
a longer period of time it must be serviced before starting operation.
– Inspection and maintenance work may only be carried out by ex-authorised specialists.
– Please check:
• Air gap
• Bolted connection, particulaly impeller fastening. Without loosing screws!
• Casing-/ impeller surface coating (e.g. rust, paint damage)
• Bearing noises
• Damages
• Vibrations
• Deposits of dirt
• Current consumption
• Function of the safety components
– It is recommended to perform a system maintenance book and enter the tests and test results carried out. Compare
the results with the results of previous audits. If the parameters vary, you should always contact the manufacturer.
– The instructions in the maintenance manual of the electric motor must be observed.
4.1 Cleaning
– All work only in dead state!
Wet cleaning under tension can lead to electric shock.
– Regular inspection, and with periodic cleaning is required in order to avoid imbalance due to pollution. Clean the
flow area of the fan.
– Do not use aggressive, paint solvent agents!
– High-pressure cleaners or water jets are not permitted!
4.2 I ndications – Disturbance origins
– If the motor protection trips this could be the result of dirt build-up, a hard running impeller and/or ball bearings.
– Abnormal noises can mean worn out ball bearings.
– Vibrations can originate from an unbalanced or dirty impeller or due to the installation.
– Extreme performance reduction can occur, if the fan operating range is higher than the final point of operation (cau-
sing a higher sound level).
4.3 Spare parts
Defective fans are to be completely exchanged according to Directive 2014/34/EU ( Equipment Safety Act). Own
repair attempts are strictly prohibited! An optimum operational safety of the fans is guaranteed only with repair by the
manufacturer.
4.4 Put out of service and dispose
The valid regulations for labour protection and accident prevention are to be observed!
– Electrical work may be carried out only by an authorised electrician.
– Use suitable lifting equipment and fixing devices for disassembling the fan.
– Dispose of the fan components in accordance with applicable regulations and laws.
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– Axial high-performance fans
Installation and Operating Instructions
CHAPTER 4
INSPECTION AND
MAINTENANCE
CAUTION
ATTENTION
UK
WARNING