Danfoss APP Series Installation, Operation And Maintenance Manual page 76

Operation guide
6 Breakdowns, causes and elimination
The below-mentioned failures can result in a use of the BoWex-ELASTIC
tion to the specifications given in these operating and assembly instructions please make sure to avoid such fail-
ures.
The errors listed can only be clues to search for the failures. When searching for the failure the adjacent compo-
nents must generally be considered.
If used other than intended the coupling can become a source of ignition.
EU directive 2014/34/EU requires special care by the manufacturer and the user.
General failures with use other than intended:
 Important data for the coupling selection were not forwarded.
 The calculation of the shaft-hub-connection was not considered.
 Coupling components with damage occurred during transport are assembled.
 If the heated hubs are assembled, the permissible temperature is exceeded.
 The clearance of the components to be assembled is not coordinated with one another.
 Tightening torques have been fallen below/exceeded.
 Components are mixed up by mistake/assembled incorrectly.
 No original KTR components (purchased parts) are used.
 Old/already worn out elastomer parts or those stored for too long are used.
 The coupling used/the coupling protection used is not suitable for the operation in potentially explosive atmos-
pheres or does not correspond to EU directive 2014/34/EU.
 Maintenance intervals are not observed.
Breakdowns
Different operating
noise and/or vibra-
tions occuring
Fracture of elasto-
mer part / spline
Please observe protection
note ISO 16016.
76 | 180R9346 | AQ240486503020en-001702
Installation, Operation and Maintenance APP 53-92 pumps
BoWex-ELASTIC
Operating/Assembly instructions
Type HEW, HEW Compact and HEW-ZS
Hazard notes for po-
Causes tentially explosive at-
Micro friction by faulty
alignment on the
spline of the elasto-
mer part
Danger of ignition due to
Screws for axial fas-
tening of hubs work-
ing loose
Fracture of elastomer
part / spline caused
by high dynamic
energy / overload
Drawn: 2017-04-24 Shg/Hk
Verified: 2017-04-24 Shg
®
®
coupling other than intended. In addi-
mospheres
1) Set the unit out of operation
2) Eliminate the reason for misalignment
(e. g. loose foundation bolts, breaking of
the engine mount, heat expansion of unit
components, modification of the installa-
tion dimension E of the coupling)
hot surfaces 3) For inspection of wear see item 5.4
1) Set the unit out of operation
2) Inspect alignment of coupling
3) Tighten the screws to fasten the hubs and
secure against working loose
4) For inspection of wear see item 5.4
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the elastomer part
3) Inspect coupling components and replace
none
coupling components that are damaged
4) Insert elastomer part, assemble coupling
components
5) Find out the reason for overload
Replacing:
Replaced by:
KTR-N 40114 EN
Sheet: 16 of 22
Edition: 7
Elimination
KTR-N dated 2013-06-10
© Danfoss | 2023.03