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23
INSTALLATION
Maintenance
15. Maintenance
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
Before any work on the appliance, disconnect all poles
of the appliance from the power supply.
For some maintenance work, the lower cap must be removed.
If you need to drain the appliance, observe chapter "Draining the
appliance".
Note the insertion depths of the controller-limiter combination
(see chapter "Specification / Dimensions and connections").
15.1 Checking the safety valve
f
f
Check the safety valve regularly.
15.2 Draining the appliance
WARNING Burns
Hot water may escape 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:
f
f
Close the shut-off valve in the cold water inlet line.
f
f
Open the hot water taps on all draw-off points.
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1 Drain valve
f
f
Drain the appliance via the safety assembly or via the drain
valve on the flanged immersion heater.
15.3 Checking / replacing the protective anode
f
f
Check the protective anode for the first time after 2 years and
replace if required.
f
f
Next, decide the time intervals at which further checks
should be carried out.
The transition resistance between the protective anode and the
cylinder connection should be no higher than 1.0 Ω.
15.4 Descaling the flange
f
f
Descale the flange only after removal.
f
f
Never treat the cylinder surface or the protective anode with
descaling agents.
15.5 Anti-corrosion protection
When carrying out service work, ensure that the anti-corrosion
protection on the insulating plate is not damaged or removed.
Reinsert the anti-corrosion protection correctly after replacement.
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1 Anti-corrosion protection
2 Pressure plate
3 Insulating plate
4 Flanged immersion heater
16. Specification
16.1 Dimensions and connections
Appliance sectional view
c01
c06
i14
i15
b03
b02
d25
d26
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