DE DIETRICH VIVADENS MCR 24_28 BIC - Manual (Page 19)

If the temperature of the central heating water in the boiler falls too
much, the integrated protection device switches itself on:
4
If the water temperature is lower than 7°C, the circulating pump is
activated.
4
If the water temperature is lower than 3°C, the boiler is activated.
4
When the water temperature is above 10 °C, the boiler is switched
off and the circulation pump runs for another 15 minutes.
CAUTION
This function is a protection device for the boiler only, not
for the system or buiding fabric.
CAUTION
If a room thermostat, connected via connectors 7 and 8,
is activated, the boiler will operate permanently until it
reaches the flow setting point.
4.4 Reading out measured values
The following values can be displayed in the information menu Q:
4 t1 = Flow temperature (°C)
4 t2 = Return temperature (°C)
4 t3 = DHW sensor temperature (°C)
This temperature is used only for internal management in DHW
mode. During DHW draw-off, this value does not correspond to
the actual DHW outlet temperature (it is always lower).
4 t4 = Outside temperature (°C)
4 fl = Ionization current (μA)
4 Mf = Fan speed (rpm)
1. Press the f key. The symbol Q flashes.
2. To access the parameters, press key S.
3. Press the [+] key successively to scroll down the various
parameters.
4. Press the > key 2 times to return to the current operating mode
T000138-A
MCR 24/28 BIC 4. Operating the appliance
170513 - 300024112-001-01 18