Hot water supply system for underfloor heating - uses correction system in circuit with external and hot water temp. sensors

摘要

The hot waterupply system for the heaters for an underfloor heating installation has a clock for operating at different levels for day and night, and uses an external temperature sensor. The actual value of the hot water supply is continuously monitored and the heating reduced when a maximum value is reached. The input to at least one heater is measured and compared with a nominal value to control the temperature. When the clock operates a switch to increase the temperature from the level for night time, a signal is passed to a flip-flop to operate a multi-way valve, connecting it with a temperature sensor in the return flow path and the external temperature sensor and a limiting value controller. These values are equalised with a predetermined reference value and a return setting operation is carried out to correct the heat requirement.