180R9346 | AQ240486503020en-001702 | 75
© Danfoss | 2023.03
Operation guide
Installation, Operation and Maintenance APP 53-92 pumps
BoWex-ELASTIC
®
Operating/Assembly instructions
Type HEW, HEW Compact and HEW-ZS
KTR-N
Sheet:
Edition:
40114 EN
15 of 22
7
Please observe protection
note ISO 16016.
Drawn:
2017-04-24 Shg/Hk
Replacing:
KTR-N dated 2013-06-10
Verified:
2017-04-24 Shg
Replaced by:
Before start-up of the coupling, please inspect the tightening of the setscrews in the hubs, the alignment and the
distance dimension L, L
HEW1
, L
HEW2
or L
HEW-ZS
and adjust, if necessary, and also inspect all screw connections for
the tightening torques specified, dependent on the type of coupling.
If used in potentially explosive atmospheres the setscrews to fasten the hubs as well as all screw
connections must be secured against working loose additionally, e. g. conglutinating with Loctite
(average strength).
Finally the coupling protection against accidental contact must be fitted. It is required in accordance with DIN EN
ISO 12100 (Safety of Machinery) and the directive 2014/14/EU and must protect against
access with the little finger
falling down of solid foreign objects.
The cover may provide for openings intended for necessary heat dissipation. These openings have to comply with
DIN EN ISO 13857.
The cover must be electrically conductive and included in the equipotential bonding. Bellhousings (magnesium
share below 7.5 %) made of aluminium and damping rings (NBR) can be used as connecting element between
pump and electric motor. The cover may only be taken off with standstill of the unit.
If the couplings are used in locations subject to dust explosion and in mining the user must
make sure that there is no accumulation of dust in a dangerous volume between the cover
and the coupling. The coupling must not operate in an accumulation of dust.
For covers with unlocked openings on the top face no light metals must be used if the cou-
plings are used as equipment of equipment group ll (
if possible, from stainless steel
).
If the couplings are used in mining (equipment group l M2), the cover must not be made of
light metal. In addition, it must be resistant to higher mechanical loads than if it is used as
equipment of equipment group ll.
During operation of the coupling, please pay attention to
different operating noise
vibrations occurring.
!
If you note any irregularities with the coupling during operation, the drive unit must be
switched off immediately. The cause of the breakdown must be specified by means of the
table „Breakdowns“ and, if possible, be eliminated according to the proposals. The p
otential
breakdowns mentioned can be hints only. To find out the cause all operating factors and
machine components must be considered.
Coating of coupling:
If coated (priming, paintings, etc.) couplings are used in potentially explosive atmospheres,
the requirements on conductibility and coating thickness must be considered. In case of
paintings up to 200 µm electrostatic load does not have to be expected. Multiple coatings
exceeding 200 µm are prohibited for explosion group llC.
5
Start-up