El- 480 temperature controller is intended for use with central heating boilers equipped with feeding screw. It controls wate circulation pump , domestic hot water pump, floor heating pump, circulation pump, blower (fan) and fuel feeder. It incorporates a valve control module and can operate with two mixing valves ( via additional  ST-61 modules). conventional (two-state) room controller or RS-port communication, GSM module or Ethernet module. The advantage of the controller is the ease of use. The user can change all parameters using  the pulser knob. Another advantage is the large and easy-to-read display where the current boiler operation  parameters are shown.

The EL480zPID controller is a unit with a continous output signal using a modified PID control algorithm. In this type of controller the blowing power is calculated by measuring the boiler temperature and the flue gas temperature as measured ath the outlet of the boiler. The fun is run continously  and the blowing power depends directly on teh measured temperature of the boiler, the flue gas temperature and the diffrence between these parameters and their setpoints . The advantages of modified PID controller include the ability to maintain  a stable setpoint temperature without any unnecessary overshoot or oscillations.

When using this type of controller equipped with a flue gas outlet sensor fuel savings can be achieved from a few percent up to around 15 percent with the output water temperature kept at very stable label, resulting in longer life of the exchanger (boiler). As the flue gas temperature at the boiler outlet is controlled this results in lowe emissions of dust and gases that are harmful to the enviroment. The termal energy of the flue gas is not wasted and released into the chimney, but is instead used for heating.