Maintenance; Dhw Cylinder; Replacing The Signal Anode - STIEBEL ELTRON HSBB 3 S Bedienung Und Installation

INSTALLATION

Maintenance

15. Maintenance
f Before any work on the appliance, disconnect all poles of any f
in-built electric components from the power supply.
f Regularly vent the safety valve until a full stream of water f
flows from it.
The heating system is not free of dirt until the strainers are com-
pletely clean following a prolonged pump run.

15.1 DHW cylinder

Opening the appliance
See chapter "Maintenance / Opening the appliance".
Draining the DHW cylinder
CAUTION Burns
Hot water may escape when draining the DHW cylinder.
f Close the shut-off valve in the cold water inlet line. f
f Open the hot water taps on all draw-off points. f
1 Drain valve
f Drain the DHW cylinder via the drain valve. f
Some residual water will remain in the bottom of the cylinder.
Cleaning and descaling
Material losses
!
Never use descaling pumps or descaling agents to clean
the cylinder.
1 Inspection port (fitted signal anode)
f Remove the signal anode from the appliance. f
f Clean the DHW cylinder with a hose that you guide through f
the inspection port.
f Draw the loosened limescale deposits out through the in- f
spection port.
40 | HSBB 3

15.2 Replacing the signal anode

1 Operating indicator blue (no function)
2 Operating indicator red (status of signal anode)
f If the red signal indicator on the user interface illuminates, f
replace the signal anode.
1
1 Signal anode
2 Pressure switch
The pressure switch is activated as soon as the signal anode is
consumed. The signal indicator illuminates.
f Check for tightness when fitting the pressure switch. f
1
Note
The signal anode must be fitted as shown in the diagram.
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