E-6
English
7
7 DHW Heating
The heat pump manager automatically calculates the maximum
possible hot water temperature in heat pump operation. The
desired domestic hot water temperature can be set in the menu
“Settings – Domestic hot water – Hot water set temp”
.
Hot water temperature - HP maximum
To attain the highest possible heat pump ratio during DHW
preparation, the controller automatically calculates the maximum
possible hot water temperature in heat pump operation based on
the current heat source temperature. The lower the heat source
temperature (e.g. external temperature, brine temperature), the
higher the attainable hot water temperature.
Hot water cylinder without flange heater
If the hot water set temperature exceeds the maximum attainable
domestic hot water temperature in heat pump operation, DHW
preparation is terminated once the so-called HP maximum
temperature is reached.
Hot water cylinder with flange heater
If the hot water set temperature exceeds the maximum attainable
hot water temperature in heat pump operation, DHW preparation
with the heat pump is terminated once the so-called HP
maximum temperature is reached, and the desired hot water
temperature is attained by reheating using the flange heater.
NOTE
Reheating with flange heater
After DHW preparation with the heat pump, the water can be further
heated to higher temperatures if the system is provided with a flange
heater. DHW heating does not take place again until the HP maximum
temperature is undershot. This ensures that basic heating can be carried
out by the heat pump.
7.1 Shut-Off Times for DHW Preparation
Besides the hot water temperature, shut-off-times for DHW
heating can also be programmed in the menu item
“Settings –
Domestic hot water
–
Hot water block’’
. No DHW heating is
carried out during this period.
If a sufficiently large cylinder is available, we recommend
carrying out DHW heating or reheating during the night-time
hours. This means that the more favourable low tariff periods
normally available can be utilized.
7.2 Thermal Disinfection
In the menu item
“Settings – Domestic hot water – Therm.
Disinfection”
, it is possible to carry out a thermal disinfection
with hot water temperatures of up to 85 °C in bivalent systems or
systems with hot water cylinders and integral flange heater. The
thermal disinfection can be carried out for each day of the week.
The start time is selectable.
