Miksi mitata varaajan lämpötilaa ja sieltä lähtevän veden lämpötilaa?
Selitin asian varmasti hieman epäselvästi (kuva kertoisi enemmän kuin tuhat sanaa), mutta tarkoitin juurikin sitä, että puskuri on LL:n menopuolella. Oletetaan, että betoni on 22 asteista ja kun sinne menevän menoveden lämpötila laskee alle tuon, niin lattiat ja samalla puskuriin palaava vesi jäähtyy. Nyt kun mittaus on paluupuolella, niin tuosta saadaan käynnistys.
Tuossa tietoa kuinka tuo käyttäytyy jos käytössä on
puskurivaraaja asetus pumpussa.
Heating water buffer cylinderTypes and configuration
Heating water buffer cylinders are required under the following conditions in systems with heat pumps:
* Several heating circuits installed.
* Heating circuits with mixer installed.
* Power-OFF periods must be bypassed.
For system diagrams 3 to 10, the heating water buffer cylinder is configured automatically, since it is a constant default here. For diagrams 1 and 2, a heating water buffer cylinder can be selected as an option via parameter "Buffer cylinder" (7200).
System examples - heat pumps Heating water buffer cylinders must have two connections each for charging and discharging. If these connections are arranged on one side one above the other, we recommend connecting the charge circuit to the bottom one and the discharge circuit to the top one. The flow rate through the heat pump in the charge circuit must be greater than that of the discharge circuit.
In contrast to the heating circuits, the heating water buffer cylinder is regulated by output and not temperature.With a direct output demand, the management of different heat sources, such as cascades, is more effective than calculating the time integral from the set and actual temperatures. The heat pump control unit treats a low loss header like a small heating water buffer cylinder. Therefore, a corresponding system diagram must also be selected when using a low loss header, or the header must be enabled via parameter "Buffer cylinder" (7200). With a low loss header, in order for the volume of the heating circuits to be able to be used as a buffer, the flow rate of the charge circuit must be lower than the flow rate to the heating circuits.
Operating modesVarious operating modes can be selected for the heating water buffer cylinder, which are differentiated by different set temperatures and different start and stop criteria. For the operating modes of the heating water buffer cylinder, different start and stop times can be specified via parameter "Switch t buffer cyl." (7201).
"Off"In "Standby" mode, the control unit monitors the frost protection of the heating water buffer cylinder. If the temperature at the cylinder temperature sensor drops below 3 °C, heating is carried out with all available heat sources. Along with the heat pump, the control unit also then immediately starts the instantaneous heating water heater and external heat sources. This occurs independently of the value selected at parameter "Electric heating" (7902). In this operating mode, as soon as the temperature in the heating water buffer cylinder exceeds 10°C, frost protection heating ends.
"Standard" and "Reduced"The temperature at the cylinder temperature sensor is used for the heat demand. The set cylinder temperature is the maximum value of all heating circuit set temperatures. If the cylinder temperature falls below the set value by more than "Hysteresis" (7203), heating of the heating water buffer cylinder starts. In "Standard" operating mode, heating ends as soon as the return temperature exceeds the set temperature given above. In "Reduced" operating mode, the temperature sensor in either the buffer cylinder or the return is used to stop the heat pump, depending
which shows the higher value. Parameter "Max. temp" (7204) specifies the maximum temperature in the heating water buffer cylinder.
"Fixed value"The set temperature of the heating water buffer cylinder is "Fixed temp." (7202). If the temperature in the heating water buffer cylinder falls below the set value by the "Hysteresis" (7203), heating of the heating water buffer cylinder starts. This ends as soon as the fixed temperature at the return temperature sensor of the heat pump is exceeded.