De Dietrich Oertli ML 52 Notice De Montage Et D'utilisation page 17

3 Product description
3.2 Function
The module prevents the temperature in the boiler from falling under the dew point, thus reducing
contamination of the boiler.
The module is installed between the buffer tank and the boiler. When the boiler circuit has reached
the opening temperature of 55 °C the thermal control valve opens the return line to the tank.
Then the pump can charge the tank.
Applications:
for heat sources requiring a return flow temperature maintenance, as for example solid fuel
•
boilers, wood firing and stove heating systems
NOTICE
Malfunction
 When the boiler output is controlled by the boiler temperature, the boiler must heat up
20 K above the opening temperature of the temperature maintenance system.
Otherwise the boiler might reduce the output even before the thermal control valve is
completely open.
2014/08 99961255DeD01-mub-ml – V01 B-7