Stiebel Eltron SHC 2.5 Directives D'installation Et Mode D'emploi page 9

OPERATION | INSTALLATION
Maintenance instructions
Removing the heating element
1. Unplug and drain the water heater (see draining
instructions).
2. Remove the cover (see removing cover
instructions).
3. Remove the thermostat from the heating element.
4. Remove the fi tting on top of the heating element
pipe.
5. Using a suitable wrench, unscrew the heating
element.
6. Remove the heating element out of the tank.
De-scaling the heating element
Scale deposit can affect the heating capacity of the heat-
ing element. Scale can even cause the element to burn
out. The element can be descaled either chemically or
manually.
1. Remove the heating element (see "Removing the
heating element").
2. To descale chemically, soak the heating element
in white vinegar or other descaling solution then
rinse well.
3. To descale manually, use a nonmetallic (soft) tool;
brush the crust off the element. Make sure you do
not damage the surface of the heating element.
4. Reinstall the heating element
5. Refi ll the tank before turning on the power to the
water heater.
Replacing the heating element
1. Unplug and drain the water heater (see draining
instructions).
2. Remove the cover (see removing cover
instructions).
3. Remove the heating element (see removing heat-
ing element instructions).
4. Install and seal the new element. Make sure that
the heating element is positioned correctly.
5. Remount all the line wires to their original loca-
tion.
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Changing the anode rod
A magnesium anode is used to extend the life of the
tank. Permanent removal of this anode for any reason
will void the warranty.
Depending on conditions, the magnesium anode rod
may need to be changed every year or so. Galvanic and
electrolytic corrosion can destroy a tank with a spent
anode rod. Rusty water is usually an indicator of a spent
anode rod.
1. Unplug and drain the water heater (see draining
instructions).
2. Remove cover (see removing cover instructions).
3. Remove heating element (see removing the heat-
ing element instructions).
4. Remove the anode rod from the dismounted heat-
ing element holder by unscrewing.
5. Fit a new anode rod into the heating element
holder.
6. Refi t all the wires and the heating element.
7. Refi ll the water heater with water and check for
leaks before connecting the power.
SHC 2.5 | 9