Extra Dhw Heating; Thermal Disinfection - Bosch HPC 400 Operating Instructions Manual

Operating the appliance
Activate constant DHW heating
▶ If the standard display is active, press the DHW key.
▶ Turn the selector to highlight Always on - DHW red. or Always on - DHW.
▶ Press the selector.
DHW heating is active uninterrupted.
Always on - DHW will result in a higher energy consumption and sound level than
Always on - DHW red..
Table 19 Adapting the settings for DHW heating

5.3.3 Extra DHW heating

This menu allows you to set how DHW heating operates when
the extra DHW function is activated.
Menu: Extra hot water
Menu item description
Start now / This menu item enables the extra DHW
Cancel function to be started and cancelled. Its
function is the same as the extra DHW key.
Temperature When the extra DHW function is active, the
DHW is heated to the temperature set here.
Duration The extra DHW function switches off
automatically after the set time.
Table 20 Extra DHW heating settings

5.3.4 Thermal disinfection

Following thermal disinfection, the cylinder content slowly
cools back down to the set DHW temperature. The cool down is
effectuated mainly through heat losses. Consequently, the
DHW temperature may briefly be higher than the selected
temperature.
CAUTION: Legionnaire's bacteria constitute a
health hazard!
▶ At low hot water temperatures thermal
disinfection or daily heating should be
1)
activated ( note the drinking water
statute).
1) Daily heating can be set by your installer in the service
menu.
HPC 400
CLIMATE CONTROL SYSTEMS
The thermal disinfection safeguards the hygienic quality of the
DHW. The hot water is heated regularly to the set temperature.
This also kills off legionella, for example. Thermal disinfection
can be configured in this menu.
Menu: Thermal disinfection
Menu item
Start
Start now /
Cancel
Temperature
Day
Time of day
Max. period
Table 21 Settings for the thermal disinfection
VOGEL NOOT
&
Working with the main menu | 21
Result
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.
description
The entire DHW volume is only heated to the
set temperature once a week or once a day if
Auto is set here.
Immediate start or termination of the
thermal disinfection independent from the
set day of the week
Temperature of the entire DHW volume at
thermal disinfection (65 ... 80 °C)
The day on which thermal disinfection is
performed.
Time of day for the automatic start of
thermal disinfection
If the thermal disinfection temperature is
not reached within the time set here,
thermal disinfection is cancelled. The user
interface then issues a fault in the display.
6 720 817 986 (2015/07)
6 720 811 136-28.1O