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5.5.5. Max. temperature of a heat consumer (Tmax DF-Drain)
Max. temperature at the heat consumer sensor for switching off the differential thermostat
function. If the temperature at the consumer sensor is higher than DF-Drain, the differential
thermostat output contacts will not close.
5.6. Heat transfer
The menu is available only if the heat transfer function is assigned to an output
in menu 7. Special functions.
The function of heat transfer between two hot water storage tanks that will switch on the
output if the switch-on temperature difference between sensors 5.6.4. and 5.6.5. is reached
and switch it off if the switch-off temperature difference between sensors 5.6.4. and 5.6.5. is
not reached any more.
5.6.1. Temperature difference for pump switch on/off (Δ T Heat transfer)
Temperature difference between a source sensor 5.6.4. and consumer sensor 5.6.5. for
switching on (ΔT on) and off (ΔT off) the heat transfer pump.
5.6.2. Max. temperature in hot water storage tank (HT Tmax)
Max. temperature at the consumer sensor for switching off the heat transfer function.
5.6.3. Min. temperature in thermal store (HT Tmin)
Min. temperature at the heat source sensor that will permit heat transfer. If the temperature of
HT Tmin is not reached at the source sensor, the heat transfer pump will not switch on.
5.6.4. Heat source sensor (thermal store)
The temperature sensor for a heat source (e.g. a thermal store) – a higher temperature is
expected than at the consumer sensor.
5.6.5. Heat consumer sensor (hot water storage tank)
Temperature sensor for a heat consumer (e.g. a hot water storage tank) – a lower temperature
is expected than at the source sensor.
5.7. General auxiliary heat source (Thermostat)
The menu is available only if the Auxiliary heat source function is assigned to
an output in menu 7. Special functions.
Settings are identical with 5.8. Aux. heat source (heating element).
5.8. Aux. heat source (heating element)
The menu is available only if the Auxiliary heat source function is assigned to
an output in menu 7. Special functions.
Switching an aux. heat source if there is a heat request to charge a thermal store (a request
from a heating circuit) or a request for DHW heating.
5.8.1. DHW thermostat
The Aux. heat source function will be activated only if there is a request for DHW heating (the
measured DHW temperature has dropped below the currently desired temperature following
the preset DHW temperatures and periods – see menu 5.3.).
5.8.2. Heating circuit thermostat
The Aux. heat source function will be activated only if there is a request for thermal store
heating for a heating circuit.
The aux. heat source switching is influenced by the time programs and method
of switching – either following a request from DHW or following a request from
the heating circuit. In case both the thermostats (5.8.1. and 5.8.2.) are switched
off, the aux. heat source will never be switched on!