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

INSTALLATIoN

Maintenance

Material losses
!
The system's active frost protection is not guaranteed if
the power supply is interrupted.
f Never interrupt the power supply even outside the f
heating season.
Material losses
!
If the heat pump and frost protection are completely
switched off, drain the system on the water side.
Information on draining the DHW cylinder can be found
in chapter "Maintenance".
Note
The heat pump manager has an automatic summer/win-
ter changeover so you can leave the system switched on
in summer.
f If you take the system out of use, set the heat pump manager f
to standby.
That way the safety functions that protect the system remain en-
abled, e.g. frost protection.
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.
36 | HSBB 3
Cleaning and descaling
!
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.

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
Material losses
Never use descaling pumps or descaling agents to clean
the cylinder.
Note
The signal anode must be fitted as shown in the diagram.
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