Troubleshooting; Maintenance; Checking The Safety Valve; Draining The Appliance - STIEBEL ELTRON SHW 200 S Bedienung Und Installation

INSTALLATION

Troubleshooting

14. Troubleshooting
Note
The high limit safety cut-out can respond at temperatures
below –15 °C. The appliance may be subjected to these
temperatures during storage or transport.
Fault Cause
The water does not The high limit safety
heat up. cut-out has responded
because the controller is
faulty.
The high limit safety cut-
out has responded be-
cause the temperature has
dropped below -15 °C.
A heating element is
faulty.
Rapid heating does not
switch on.
The safety valve drips The valve seat is contam-
when the heating is inated.
switched off.
1 High limit safety cut-out reset button

15. Maintenance

WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
WARNING Electrocution
Before any work on the appliance, disconnect all poles
of the appliance from the power supply.
If you need to drain the appliance, observe chapter "Draining the
appliance".

15.1 Checking the safety valve

f Regularly vent the safety valve on the safety assembly until a f
full water jet is discharged.
26 | SHW S

15.2 Draining the appliance

If the cylinder needs to be drained for maintenance or to protect
the whole installation when there is a risk of frost, proceed as
follows:
Remedy f Close the shut-off valve in the cold water line.
Replace the thermostat
f Open the hot water taps on all draw-off points.
and press the high limit
f Drain the appliance via the safety assembly.
safety cut-out reset but-
ton.
Press the reset button.

15.3 Replacing the signal anode

f Replace the signal anode if it becomes depleted.
Replace the flanged im-

15.4 Cleaning and descaling the appliance

mersion heater.
Check the contactor and f Never use descaling pumps.
replace if required.
f Only descale the flanged immersion heater after dismantling
Clean the valve seat.
Torque of the flange screws: see chapter "Specification / Dimen-
sions and connections"
1

15.5 Replacing flanged immersion heater

1 Insulation plate
2 Flange plate
3 Soldered flange
4 Insulating plate
5 Corrosion resistor 390 Ω
6 Gasket
The corrosion resistor acts to balance the potential and prevents
power leakage corrosion on the heating elements.
f Never damage or remove the corrosion resistor during
f After replacing the corrosion resistor, reassemble the flanged
WARNING Burns
Hot water may escape during the draining process.
f
f
f
f
f
f
and never treat the cylinder surface or protective anode with
descaling agents.
6
5
4
3
f
maintenance.
f
immersion heater correctly.
2 1
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