Commissioning and Maintenance
© robatherm 23
Attention
In order to avoid any vibration fractures, fans may not be operated at unacceptably high
speeds (see below) and also not in the field of the resonance speed (and multiples of it) of
the fan motor system.
Therefore resonance speeds are to be established on commissioning and blanked at the
frequency converter. Rebalance if necessary.
Fans may not be run outside the operating range stated by the manufacturer.
The manufacturer’s acceleration and delay times must be observed.
There is a danger of fire through grinding impeller, belt, hot running bearings.
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Working on Fan Motor Assembly
During work on fan motor assembly, e.g. bearing replacement, fitting of plug fan etc., the
separate assembly instructions must always be followed (ask for them to be forwarded if
necessary!). After this the vibration speed of the unit must be checked, assessed and
balanced if necessary.
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Caution
Serious bodily injuries or even loss of life and material damage can be caused by the
breakage of the impeller. Do not operate fan if there are extreme vibrations or unacceptably
high vibration speeds.
Assessed limits for vibration velocity v
eff
under VDI 2056 and DIN ISO 10816:
Installation Machine
Class
good passable Still
permissible
Rigid to 15kW K 0.7 mm/s 1.8 mm/s 4.5 mm/s
Rigid from 15kW M 1.1 mm/s 2.8 mm/s 7.1 mm/s
Vibration-isolated T 2.8 mm/s 7.1 mm/s 18 mm/s
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Maintenance
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Maintenance Interval
Every three months. ATEX units every month.
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Maintenance Instruction
The maintenance interval must be shortened accordingly if there is a multi-shift operation
and/or special operating conditions such as fluid temperature > 40 °C, appearance of dust
etc.
If one or more V-belts fail in a multiple groove drive, then a new V-belt set must be fitted.
Prior to fitting the V-belts, the axle base must be reduced so that the belts can be placed in
the grooves without force. Forcible fitting by means of a screwdriver etc. is in any case not
permitted as it can lead to damage.
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Caution
Observe general safety instructions on page 3!
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Cleaning Agent
Cleaning agent shall have a pH value between pH 7 – pH 9.
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