Dimensions
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Dimensions
Glossary
Flow and return flow temperature
The flow temperature is the temperature to which the
heat source heats the water that transfers the heat to the
consumer (e.g. radiator). The return flow temperature is
the temperature of the water that flow back from the
consumer to the heat source.
Desired and actual temperature
The desired temperature (or setpoint temperature)
describes the desired temperature for a room or for hot
water.
The actual temperature denotes the actual temperature
that prevails. The heating controller has the task to adjust
the actual temperature to the desired temperature.
Setback temperature
The setback temperature is the desired temperature to
which the heating system heats outside heating times
(e.g. at night). It should be set so that the rooms do not
cool down too much while saving energy.
Heat source
Heat source is generally the designation for the heating
boiler. It may also be a buffer storage tank however.
Circulation pump
The circulation pump ensures that there is constant hot
domestic water available. The hot water is held in the
storage tank. The circulation pump circulates it via the
fresh water pipes in accordance with the heating
program.
Return flow booster
The return flow booster prevents the temperature
difference at the heat source between flow an return
becoming too great. A mixing valve is here used to add a
portion of the hot flow water to the return flow. This
prevents heating gas steam from condensating against
the cold heat carrier inside the heating boiler. The
minimum temperature required for this process inside the
heating boiler depends on the type of fuel (oil 47°C, gas
55°C). The risk of corrosion inside the heating boiler is
thereby reduced significantly.
Direct heating circuit
In the direct heating circuit the flow temperature is
identical to the heat source temperature, i.e. the direct
heating circuit is operated with the maximum
temperature.