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Operation
Compress 7001i/7400i AW AWE – 6721835320 (2021/09)
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3.3.2 DHW settings
Using the extra DHW, thermal disinfection or daily heat up functions can
lead to higher electricity cost as the electric booster heater may be
activated.
If a fresh water station is installed, setting the DHW temperature ≥ 52 °C
can lead to higher electricity cost as the electric booster heater may be
activated.
Setting the operation mode for DHW heating
The installer sets the temperatures for the different modes.
Menu: Op. mode
Table 7 Settings for operation mode of DHW
Setting the time program for DHW heating
Menu: Time program
Table 8 Time program settings for DHW
Activating extra DHW heating
Menu: Extra hot water
Table 9 Settings for the extra hot water function
Thermal disinfection
WARNING
Danger to life from legionella!
Legionella can form in domestic hot water at DHW temperatures that are
too low.
Activate thermal disinfection
-or-
Have daily heat-up set in the service menu by the specialist
technician.
Thermal disinfection may be terminated prematurely due to the
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.
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.
WARNING
Risk of scalding!
If thermal disinfection or the daily heat-up has been activated to avoid
legionella, the DHW is heated once to in excess of 60 °C (e.g. Tuesday
night at 02:00).
Only carry out thermal disinfection/daily heat-up outside normal
hours of use.
Make sure that a thermal mixer is installed. If in doubt, ask your
installer.
Menu: Autom. therm. disinfect.
Table 10 Settings for thermal disinfection
Menu item Description
Op. mode [Off]: Deactivated, no DHW production.
[Always on - DHW Eco+]1): Lowest DHW
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
Menu item Description
My DHW time
prog.
Own time program for DHW heating that works
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.
Menu item Description
Start now/
Cancel now
After activation of the extra hot water function, DHW
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.
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/
Cancel now
Immediate start or cancellation of thermal
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.
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