English
EN-22/32
10.2. Observing Regular Inspection Intervals
In the interests of upkeep and safety we recommend having the operation
and condition of the fans inspected at regular intervals by duly qualified
service personnel or a professional maintenance firm and documenting these
inspections.
The nature and extent of the maintenance work, the service intervals and any
additional work required needs to be specified on a case-by-case basis
depending on the use of the fans and the general conditions on site.
Our servicing and inspection recommendations based on VDMA 24186-1
can be found on our website
.
10.3. Preparing for Maintenance
1.
Disconnect the motor from the mains.
2.
Centrifugal fans fitted with an inspection switch should be switched off
using the inspection switch.
3.
Take measures to prevent the centrifugal fan from being switched on
accidentally.
4.
Wait until the impeller has stopped.
5.
Wait until all hot surfaces have cooled down.
6.
Remove any residues from the fan.
7.
Depending on the situation installation components may be dismantled
for inspection and maintenance.
Preparation for maintenance is completed
10.4 Maintenance recommendations for centrifugal fans:
Table 10-1:
Maint. recommendation
Conduct test run if applicable (see Chapter 8.4).
Document inspection intervals observed.
Pos.
Description
1.0
Fan
quarterly
cyclic
on demand
1.1
Check deposit, damages, corrosion an fixing
×
1.2
Check impeller for damage and unbalancing, vibration check
×
1.3
Check bearing noise
×
1.4
Relubricate bearing (acc. to relubrication plan)
×
1.5
Check flexible connection for tightness
×
1.6
Check correct function of AVM
×
1.7
Check safety devices (guards) for effectivity
×
1.8
Check condense water drain
×
1.9
Clean whole unit in order to keep all elements in best working conditions
× ×
1.10
Check rotational sense of impeller (for all speeds)
×
1.11
Check fan function and its readiness to immediate start up
×
2.0
Motor
quarterly
cyclic
on demand
2.1
Visual control for dirt, damages, corrosion and correct fixing
×
×
2.2
Check rotational sense
×
2.3
Check bearing noise
×
2.4
Relubricate bearing (in case of relubricatable bearings)
×
2.5
Check safety devices (guards) for effectivity
×
2.6
Check tight electrical connections on tight fixing
×
2.7
Clean whole unit in order to keep all elements in best working conditions
× ×
3.0
Belt Drive
quarterly
cyclic
on demand
3.1
Check for deposit, damages and wear
×
3.2 Change
V-belts
×
3.3
Check tightening and alignment
×
3.4
If necessary retighten / align
×
3.5
Check safety devices (guards) for effectivity
×
