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Hot water preparation
7.1.2
Heating Curve Optimisation
There are two setting options for optimising the heating curve:
Changing the gradient by means of a higher or lower
"Heating curve end point"
If
Too cold
Raise "Heating curve end point" value
by 2 °C to 3 °C
Too hot
Lower "Heating curve end point"
value by 2 °C to 3 °C
7.2 Regulation via Room Temperature
For well-insulated houses, open-plan designs or when heating
large individual rooms, the return set temperature can be
calculated using the room temperature in a reference room.
Make selections in the menu "Settings – Heating circuit 1 –
Control by – Room temperature".
Automatic controller action
The greater the deviation between the room temperature and the
room set temperature, the faster the return set temperature is
adjusted.
The response time can be changed by means of the adjustable
interval value (I value) if required. The longer the response time,
the slower the room set temperature is adjusted.
NOTE
The entered room set temperature cannot be changed by pressing the
buttons Hotter (⇑) and Colder (⇓).
7.3 Fixed-Setpoint Regulation / Setting a Horizontal Heating Characteristic
Curve
In special cases (e.g. heating a buffer tank to a constant
temperature), it is possible to set a characteristic curve which is
independent of the external temperature. Make selections in the
menu "Settings – Heating circuit 1/2/3 – Control by – Fixed-
setpoint". The desired return set temperature can be set in the
following menu item "Fixed-setpoint Control – Return set
temp.".
8 Hot water preparation
Hot water cylinders with a sufficient heat exchanger area should
be used for DHW preparation. These must be capable of
permanently transferring the maximum heat output of the heat
pump.
Regulation is carried out using a sensor installed in the hot water
cylinder. The sensor is connected to the heat pump manager.
The temperatures attainable in heat-pump-only operation are
below the maximum flow temperature of the heat pump.
For higher hot water temperatures, the heat pump manager
offers optional control of a flange heater.
below -7 °C
Raise Hotter (⇑) / Colder (⇓) by
1 °C to 2 °C
Lower Hotter (⇑) / Colder (⇓) by
1 °C to 2 °C
Raising or lowering the entire heating curve by means of the
buttons Hotter (⇑) and Colder (⇓)
External temperature
-7 to +7 °C
Prerequisites:
For systems with silent cooling, the room climate control
station is used for room temperature measurement. For all
other systems, an additional room sensor (R13) must be
connected to the analogue input X3-R13.
Deactivation of individual room control, if installed, in the
reference room.
Entry of a minimum return set temperature to prevent the
building from cooling down if there is internal heat recovery
in the reference room.
Entry of a maximum return set temperature to prevent the
building from overheating if the windows are open
Constant room set temperature with the elimination of as
many raising and lowering operations as possible
NOTE
Activating the room temperature regulation or changing the room set
temperature can initially result in the room temperature being exceeded.
NOTE
The entered fixed-setpoint cannot be changed by pressing the buttons
Hotter (⇑) and Colder (⇓).
Regulation can also be carried out using a thermostat. With this
application, selective reheating using a flange heater is not
possible.
NOTE
The additional setting options for heat pumps with an additional heat
exchanger installed in the hot gas are described in Chap. 12 on p. 33.
above +7 °C
Lower Hotter (⇑) / Colder (⇓) by
1 °C to 2 °C and lower value "Heating
curve end point" by 2 °C to 3 °C
Lower Hotter (⇑) / Colder (⇓) by
1 °C to 2 °C and raise "Heating curve
end point" value by 2 °C to 3 °C
EN-25
8
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