CAIRplus Commissioning and Maintenance
PR-2009-0096-GB • Subject to modifications • R8-10/2015 67
8.4.3 Commissioning of direct-driven fan assembly
DANGER!
• Please consider the safety instructions on page 5 and page 56 when performing
all the described activities!
• Remove remaining installation debris and foreign matter from the impeller and air
intake zone.
• Check motor protection for correct setup (also see separate project-related
documentation and/or „Motor protection“ on page 50).
• With Y/Δ starting, set up the motor protection device for 58% of the rated current if
the phase current flows through the latter – i.e. motor protection device must be
installed between motor terminals U1, V1, W1 and not in mains supply line upstream
of the control unit.
• It is not allowed to activate the parameter "overmodulation" as this can damage the
impeller.
• Besides, ensure that the maximum frequency does not exceed the allowable limit
(refer to data sheet on fan).
• Consider the relevant instructions specified in the enclosed manual for the
frequency inverter. Use a screened motor cable only.
8.4.4 Maintenance of direct-driven fan assembly
DANGER!
• Please consider the safety instructions on page 5 and page 55ff when performing
all the described activities!
Carry out the following maintenance steps:
• Check electric motors for dirt, damage, corrosion and secure mounting.
• Check electric motors for noise in bearings, if required, engage qualified licensed
staff to replace bearings.
• Check impeller, especially welded seams for possible cracks; if required, engage
qualified licensed staff to replace bearings.
Notice!
In this case, DencoHappel neither accepts warranty claims nor assumes liability.
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