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Glossary
Heating circuit
A heating circuit is a sealed system for heat distribution. It consists of
radiators or underoor heating, the associated valves and pipes for the ow
and return.
Heating curve
The heating curve describes the relationship between the outside
temperature and the ow temperature that is required to achieve the
required room temperature.
Heating mode
In heating mode the room temperature is maintained at around the day
temperature value at times of high usage, e.g. during the day.
Mixer circuit
The mixer circuit is a heating circuit in which a mixer is tted to control the
temperature of the heating water. The mixer is tted in the heating ow to
regulate the ow temperature by mixing in cooler return water.
Pasteurisation function
Legionella are a type of bacteria which can cause serious illness. Legionella
bacteria can form and multiply if tap water is exposed to long dwell times at
temperatures between 25 °C and 50 °C. This can occur in DHW cylinders.
The pasteurisation function can kill any bacteria in the hot water by short
term heating to temperatures in excess of 65 °C.
Setback mode
In setback mode, the set room temperature is reduced to the economy
temperature during times of low usage, e.g. during the night.
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