The SICURCAM control unit is very essential in design, giving simple but complete control of the boiler-flue (heat flue). The thermostat adjustment knob is used to select the temperature to start the heat pump, which is signalled by a led on the main switch when it is running. The thermometer gives an exact reading of the water temperature. In the case of overheating (app. 95°C) a sound alarm triggers which is controlled by a safety thermostat. The exchange also has an independent switch (for rotisserie if required) and is fitted with a housing pocket for the sensitive bulbs in the thermostat and for the thermometer.