Bosch Compress 3400iAWS E Operation Manual page 14

Operation
Setting the operation mode for DHW heating
The installer sets the temperatures for the different modes.
Menu: Op. mode
Menu item Description
Op. mode • [Off]: Deactivated, no DHW production.
• [Always on - DHW Eco+]
temperature mode that results in lowest energy
consumption.
• [Always on - DHW Eco]: Medium DHW
temperature mode that results in medium energy
consumption.
• [Always on - DHW comfort]: Highest
temperature mode that results in higher energy
consumption.
• [Own time program]: DHW time program that
operates independently of any heating circuit
time program.
1) Not available for fresh water station
Table 8 Settings for operation mode of DHW
Setting the time program for DHW heating
Menu: Time program
Menu item Description
My DHW time Own time program for DHW heating that works
prog. independently of the time program for the heating
system. 6 switching times can be set for each day or
group of days. One of the operating modes can be
assigned to each switching time in automatic mode.
The minimum duration of a time slot between two
switching times is 15 minutes.
Resetting prog. The time program for the DHW system is reset to the
default setting with this menu item.
Table 9 Time program settings for DHW
Activating extra DHW heating
Menu: Extra hot water
Menu item Description
Start now/ After activation of the extra hot water function, DHW
Cancel now is heated for the set duration to the set temperature.
When the function is active, [Cancel now] is
displayed in the menu. Select this setting for
immediate deactivation of the extra hot water
function.
Temperature Desired DHW temperature for the extra hot water
function.
Duration Duration for the extra hot water function. When the
time has expired, the function automatically
switches off and the system goes back to normal
DHW operation.
Table 10 Settings for the extra hot water function
14
Thermal disinfection
Danger to life from legionella!
Legionella can form in domestic hot water at DHW temperatures that are
too low.
1)
: Lowest DHW
▶ Activate thermal disinfection
▶ Have daily heat-up set in the service menu by the specialist
▶ Thermal disinfection may be terminated prematurely due to the
▶ Observe the statutory regulations on drinking water.
If the thermal disinfection has terminated prematurely a notification is
shown in the display. The system will repeat the thermal disinfection 24
hours later.
If the thermal disinfection is set and activated at an external heat source,
the settings at the user interface have no effect on the thermal
disinfection.
Risk of scalding!
If thermal disinfection or the daily heat-up has been activated to avoid
legionella, the DHW is heated once to above 60 °C (e.g. Tuesday night at
02:00).
▶ Only carry out thermal disinfection/daily heat-up outside the normal
▶ Make sure that a mixer is installed. If in doubt, ask your expert.
Menu: Autom. therm. disinfect.
Table 11 Settings for thermal disinfection
WARNING
-or-
technician.
system configuration or frequent water extraction. In this case the
control unit issues a fault display. When thermal disinfection is
activated, attention must be paid to ensuring, that this is performed
successfully without a fault display.
WARNING
hours of use.
Menu item Description
Start The entire DHW volume is automatically heated to
the set temperature once a week or daily, if [Auto] is
set here.
Start now/ Immediate start or cancellation of thermal
Cancel now disinfection independently of the set day of the
week.
Weekday Day of the week, on which thermal disinfection is
automatically carried out once a week, or daily
thermal disinfection.
Time of Day Time of day for the automatic start of thermal
disinfection.
Compress 3400iAWS E – 6721852787 (2023/01)