Function - PAW RHT Series Installation And Operation Instructions Manual

3 Product description

3.2 Function

RHT / RHK pump sets for return flow temperature maintenance
The pump set prevents the temperature in the boiler from falling under the dew point, thus reducing
contamination of the boiler.
The pump set is installed between the buffer tank and the boiler. When the boiler circuit has
reached the opening temperature of 50 °C or 60 °C respectively, 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.
2018/02 999612x-mub-ml – V08 B-7