21
Use the main menu
HMC300 – 6 720 813 192 (2014/10)
5.3.3 Extra hot water heating
In this menu you can set how the heating of hot water should
work when the function Extra hot water is activated.
Menu: Extra hot water
5.3.4 Thermal disinfection
After thermal disinfection the content in the hot water heater
slowly cools to the set hot water temperature. This mainly takes
place through heat loss. The hot water temperature can
therefore temporarily be higher than the set temperature.
Thermal disinfection guarantees a hygienic impeccable quality
of the hot water. The hot water is also regularly heated up to the
set temperature. This also contributes towards preventing
legionnaires' bacteria. This menu is used to configure thermal
disinfection.
Menu: Thermal disinfection
Menu options Description
Start / Cancel With this menu option the function Extra hot
water can be started and cancelled. The
function is the same as with the Extra hot
water button.
Temperature When the function Extra hot water is active
the hot water is heated up to the
temperature set here.
Time The function Extra hot water stops
automatically after the time set here.
Table 18 Settings for extra heating of hot water
CAUTION: Legionnaire's bacteria constitute a
health hazard!
▶ At low hot water temperatures thermal
disinfection or daily heating should be
activated
1)
( note the drinking water
statute).
1) Daily heating can be set by your installer in the service
menu.
WARNING: Risk of scalding!
If thermal disinfection has been activated to
avoid legionella, the hot water is heated once
to in excess of 65 °C (e.g. Thursday night at
02:00).
▶ Only schedule thermal disinfection for
periods outside normal usage times.
▶ Make sure that a mixer is installed. If in
doubt, ask your contractor.
Menu options Description
Start It is only if Auto is set here that the full
volume of hot water will be automatically
heated up to the set temperature once a
week or once a day.
Start / Cancel Thermal disinfection starts or stops
immediately, irrespective of the set
weekday.
Temperature Temperature of hot water volume during
thermal disinfection (65 – 80 °C)
Day The weekday when thermal disinfection is
carried out automatically.
Time of day Time when thermal disinfection starts
automatically
Max. period If the temperature for thermal disinfection is
not reached during the time specified here,
the thermal disinfection will be cancelled.
The control unit will then indicate
interference.
Table 19 Settings for thermal disinfection
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