eta eHACK 20-50 kW, Service Manual

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Cleaning (customer) Cleaning and maintenance
2.5 Cleaning (customer)
2.5.1 Preparation
Stop heating
End the boiler's heating mode with the On/Off switch
in the boiler overview window. The boiler
performs an ember burnout and then changes to
[Switched off] mode. Press the [De-ash]
button to
make the boiler perform a final de-ashing.
WARNING!
Switch off the electricity to the boiler via the mains
switch

Switch off the electricity to the boiler via the mains
switch. This prevents injuries caused by switching
the boiler on inadvertently.
WARNING!
Burns caused by hot parts
Risk of burning on parts located behind the
boiler housing, even after shutting the boiler
down.

Allow the boiler to cool down sufficiently
before starting any activities.
2.5.2 Check safety devices
Checking the safety valves
Perform a visual check of all safety valves of the
heating system. The outlets of the safety valves may
not drip.
Fig. 2-11: Safety valve
If the safety valve drips, open it with a quarter turn of
the red cap and rinse it out (danger of scalding). If the
safety valve still cannot be sealed effectively after
being rinsed several times, it must be cleaned or
replaced by an installer (heating technician).
A manual check of the safety valve is carried out
with a 1/4 turn of the red cap. This rinses the
safety valve. However it is very likely that the seal will
be damaged in the process and thus the outlet will drip.
That is why you should only perform this check on
weekdays and never on weekends in cold winter, as no
heating technician may be available if the seal is
defective.
Check function of safety devices in fuel path
Check the safety devices in the fuel path, such as the
temperature-monitoring system, the manually
operated extinguishing system or the automatic extin-
guishing system.
Also check malfunction indicators and alarms, for
example if messages from the boiler room are
displayed elsewhere.