Stiebel Eltron PSH 50 COMFORT UNIVERSAL 229270 [20/44] Maintenance

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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.

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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

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1 Limiter sensor

2 Controller sensor