Principle of operation
When putting into operation of the heater is ignited by a pilot light piezoelectric device of which the flame of the main burner starts. The heat resulting from the combustion of the gas is passed through the bottom of a steel tank and flue pipe onto the water in the tank. The water tank is equipped with a fuse against backflow of flue gas (flue gas thermostat), which in case of failure of flue flow blocks the action of the heater and disconnects the supply of gas to the gas armature. The temperature of heated water is set by user by setting the control button of the thermostat in the range of 30 to 70 °C. The water temperature at the adjusted value is maintained automatically. Its additional heating starts after either taking away about 20 l of hot water or the drop of temperature by 5 °C.