5Operating manual for the auroMATIC 620 0020094404_00 Controller
Preventing the risk of scalding
There is a danger of scalding at the hot water draw-off
points if the temperatures are greater than 60 °C.
Young children and elderly persons can even be at dan-
ger at lower temperatures.
Select the hot water temperature so that nobody is
at risk.
When the anti-Legionella function is active, the DHW
cylinder is heated to over 65 °C for at least one hour.
To protect yourself from scalding,
ask your expert technician whether the anti-Legio-
nella function is active.
ask your expert technician when the anti-Legionella
function starts.
ask your expert technician if he has installed a cold
water mixer valve as protection from scalding.
Preventing material damage
Never interfere or tamper with the boiler or other
parts of the heating installation.
Never attempt to carry out maintenance work on the
controller yourself.
Do not damage or remove seals on components. Only
suitably qualified expert technicians or our customer
service may alter sealed components.
Always refer to a qualified expert technician in the
event of error messages on the unit.
Avoiding malfunctions
Only operate the heating installation when it is in a
technically perfect condition.
Do not remove or bridge out any safety or monitoring
devices.
Do not override any safety or monitoring devices.
Have any faults or damage that affect safety rectified
promptly by your expert technician.
i
When thermostat control is active, all the
radiator valves in the room in which the con-
troller is installed must be fully open.
Make sure that:
the controller is not obstructed by furniture, curtains
or other objects.
all the radiator valves in the room in which the con-
troller is installed are fully open.
Ask your expert technician whether the thermostat
control is active or check in Menu C2 in the Expert
Technician level (¬ Chap. 5.12).
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Preventing frost damage
If there is a power cut, or if the room temperature is set
too low in individual rooms, it can not be ruled out that
sections of the heating system might be damaged by
frost.
If you are going to be away during a cold period,
make sure the heating system remains in operation
and that the rooms are sufficiently heated.
Always observe the information on frost protection
(¬ Chap. 5.15).
2.4 Directives, laws and standards
Controller and controller installation
EN 60335–2–21
Safety of household and similar electrical appliances;
Part 2: Particular requirements for storage water hea-
ters (domestic hot water cylinders and hot water boi-
lers) (IEC 335–2–21: 1989 and Supplements 1; 1990 and
2; 1990, modified)
Any telecommunications equipment connected must
conform to the following standards: IEC 62151, or
EN 41003 and EN 60950-1: 2006 Chapter 6.3.
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Safety 2
