STIEBEL ELTRON 229269, Operation And Installation

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15. Maintenance
DANGER Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
If you additionally need to drain the appliance, observe chapter
„Draining the appliance“.
15.1 Checking the safety assembly and safety valve
ª
Check the safety assembly and safety valve regularly.
15.2 Draining the appliance
DANGER Scalding
Hot water can be expelled during draining
If the appliance needs to be drained for maintenance or to protect
the whole installation when there is a risk of frost, proceed as
follows:
ª
Close the shut-off valve in the cold water line.
ª
Open the hot water taps on all draw-off points.
26
_0
2
_07
_0
152
1
1 Drain valve cap
ª
Undo the cap of the drain valve.
15.3 Checking the protective anode
ª
Check the protective anode after the first year of use and re-
place if necessary.
ª
Afterwards determine the time intervals at which further
checks should be carried out.
15.4 Descaling
ª
Remove loose scale deposits from the cylinder.
ª
If necessary, descale the inner cylinder with commercially
available descaling agents.
ª
Only descale the flange after disassembly and never treat the
cylinder surface and protective anode with descaling agents.
15.5 Immersion depth of temperature controller and
temperature limiter
2 1
2
6
_0
2_0
7
_0
1
5
7
1 Limiter sensor
2 Controller sensor