Denco CAIRplus Operation Manual page 67

CAIRplus
8.4.3 Commissioning of direct-driven fan assembly
DANGER!
8.4.4 Maintenance of direct-driven fan assembly
DANGER!
PR-2009-0096-GB • Subject to modifications • R8-10/2015
•
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).
Δ
•
With Y/ 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.
Notice!
In this case, DencoHappel neither accepts warranty claims nor assumes liability.
•
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.
•
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.
Commissioning and Maintenance
67