Means for determining the a - and periods of inactivity a burner of a hot water - heating system

摘要

The invention relates to a hot water heating system which includes individually operated radiators arranged in parallel. A heat exchanger and a pump supply hot water to the radiators. Control apparatus is included for reducing the on and off switching frequences. The control apparatus includes an integrator which outputs a value which is proportional to the difference between a reference temperature and the temperature at the output of the heat exchanger. The integrator value is fed to a hysteresis switch which switches the heat exchanger on and off when the integrator value reaches the opposite limits of the hysteresis switch.