How to replace the heating
52
SM_Elmasonic_S_02.2018_EN
© Elma Schmidbauer GmbH
13
How to replace the heating
The PTC heating element is safe to run dry. If the level of the
liquid falls below the position of the heating element, it
automatically reduces the current consumption and thereby
reduces the heating energy.
The performance of the heating element does not change
during its service life. The only possible cause of a breakdown
of this type of heating is a short circuit in the component
(humidity, faulty insulation, etc.)
No function:
In most cases the fault current breaker or the fuse automatic of
the relevant socket is released.
The fuses on the interference filter are faulty.
See relevant spare parts list
The aluminum casing of the heating element is pushed into to
supporting rails and secured against displacement with silicone.
On many units the heating element can be replaced without
removal of the transducer tank tank.
Exceptions: S10H, S60H, S100, S120H, S180; S300H. On
these units the transducer tank must be removed first as
described in
section 15.
On all other units proceed as follows:
1. Open the unit as described in
section 6
.
2. Find the faulty heating elements (if there are more than one
heating element), e.g. by separately connecting the
individual heating elements to the voltage supply.
Caution:
in addition to the electric supply cable to the heating
element, the earthing must be provided.
3. Loosen the connecting cables from the faulty heating
element.
4. Cut the silicone fixation (which secures the heating element
against displacement) in the area between the support rails
and the heating element
see illustration 13.1.A
/
13.2.A /
13.3.A.
5. Push the aluminum profile of the heating element
horizontally out of the guiding rails, e.g. with a large fork
wrench, a wood block, etc. and a plastic hammer.
6. Use a file to round off the two edges of the aluminum profile
of the new heating element where it will enter the supporting
rails.
7. Carefully push the heating element into the supporting rails.
8. Secure the heating element against displacement with
silicone.
Cause of breakdown
Consequence
Elma order no.
Exchange of
component
How to proceed
