Replacing The Components; Non-Stick Film; Elements; Safety Thermostat - Carel heaterSteam User Manual

Level control (Fig. 14.2.2)
The level control (see Fig. 14.1.1, part. no. 6) is contained in a transparent
cylindrical housing.
Disconnect the connector attached to the partition (see Fig. 14.1.1, part.
no. 2), remove the device from the spring bracket, remove the connection
tubing and the two covers.
Check that the O-rings are not damaged or cracked; replace them if
necessary.
Check the cleanliness and free sliding of the two float switches.
Clean all the components and reassemble and replace the device.
Carefully check that the connection tubes are properly positioned and
that they are not blocked or choked at any point.
IMPORTANT WARNING: after having replaced or checked the
hydraulic parts, check that the connections have been carried out correctly, with their corresponding seals. Re-start the
machine and run through a number of fill and drain cycles (from 2 to 4), at the end of which, applying the safety
procedure, check for any water leaks.

Replacing the components

Non-stick film

If requested as an option, the internal wall of the cylinder is lined with a non-stick film to avoid lime being deposited on the
internal walls of the cylinder. To clean or replace the film, remove the cylinder following the procedure described in
Maintenance of the cylinder-boiler and then:
slowly remove the film towards the mouth of the cylinder, without forcing it to avoid damage;
open the film after having released the click-on couplings;
clean the film with water and a plastic spatula if necessary; replace the film if damaged;
wind the film around itself, reinserting the click-on couplings, and place it into the cylinder after the latter has been
carefully cleaned and freed from deposits.

Elements

To replace the elements remove the cylinder following the procedure described in Maintenance of the cylinder-boiler and
loosen the fastening nuts from the threaded spigots of the elements.
Before reassembling the elements, check the state of the gaskets and replace them if necessary.

Safety thermostat

To replace the safety thermostat remove the cylinder following the procedure described in Maintenance of the cylinder-boiler
and then:
disconnect the two fast-ons from the head of the thermostat;
remove the bulb of the thermostat from the well which is not market with a coloured dot (Fig. 14.1.4, part. no. 8);
remove the thermostat support bracket from the cylinder cover;
replace the thermostat after having unscrewed the two fastening screws;
replace the thermostat following the same operations in the reverse order.
PTC overtemperature sensor
with type H or T control module)
The PTC sensors (one for each heating element) do not require regular maintenance; they should only be replaced if the safety
thermostat is activated due to operation without water: in fact, the intervention of just one PTC will cause the control module
to shut-down operation.
To replace the sensors, remove the cylinder following the procedure described in Maintenance of the cylinder-boiler and
then:
Carel code +030221761
n. description
1 transparent polycarbonate cylinder
2 upper cover
3 O-ring (ORM 0300-20)
4 double float sensor
5 lower cover
(optional in the version with type C control module, standard in the version
Tab. 14.2.2
47
preliminary version - rel. 2.0 - 03/09/99
heaterSteam
Fig. 14.2.2