Installation manual
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Integration of the Heat Pump in the Heating System 8.11
8.9.3 Renewable heat sources
The heat pump manager has a separate operating mode for the
integration of renewable heat sources such as solid fuel boilers
or thermal solar energy systems. The “Bivalent-renewable”
operating mode can be chosen during the preconfiguration. In
this operating mode the heat pump heating system responds like
a mono energy system; when heat is supplied by the renewable
heat source, the heat pump is automatically blocked and the heat
generated by the renewable heat source is mixed into the
heating system. The mixer outputs of the bivalence mixer (M21)
are active.
If the temperature in the renewable cylinder is high enough, the
heat pump is also blocked during domestic hot water preparation
or swimming pool needs.
Heat pumps which are not equipped with a flow sensor (R9) must
be retrofitted In reversible heat pumps or heat pump heating
systems with a third heating circuit “Bivalent-renewable” is not
available since the sensor (R13) is already in use.
Fig. 8.16: Circuit diagram for heating operation with a solid fuel boiler
8.10 Heating a Swimming Pool
Swimming pool heating is integrated parallel to the heating and
hot water heat pump. The swimming pool is heated by means of
a swimming pool heat exchanger (see Fig. 8.41 on p. 199 for
hydraulic integration).
We recommend controlling the swimming pool heating via a time
switch. The heating requirements of the swimming pool should
only be forwarded to the heat pump manager if the swimming
pool pump (M19) is running and the filter pump is switched on.
The transmission capacity of the heat exchanger must be based
on the specific features of the heat pump, e.g. max. flow
temperature of 55 °C and the minimum heating water
throughput of the heat pump.
Not only the nominal output, but also the construction, the flow
rate through the heat exchanger and the thermostat setting are
important criteria for making a selection. The design temperature
of the pool (e.g. 27 °C) and the flow rate in the pool circuit should
also be taken into account when dimensioning the system.
Fig. 8.17: Integration of swimming pool heating with heat pumps
8.11 Constant-Regulated Tank Charging
Two buffer tank thermostats and one contactor (2 contacts) are
necessary for regulation of buffer tanks with large volumes which
are to be charged with a constant temperature.
NOTE
The illustrated circuit ensures full charging of the buffer tank and in this
way prevents the heat pump from surging.
Fig. 8.18: Regulation for constantly-regulated tank charging
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