<p>Plumbers Choice Electric Element Thermostatic Control Unit - Chrome can be installed as an electric only application as well as a dual fuel installation on a central heating system. It has been designed to work with up to 800W elements and has an IPX4 rating. The unit is 85 mm square in size and is designed to fit existing single back boxes. The Power On/Off Button activates the unit. Every press of the upper( + ) Output control button illuminates 1 of the 5 LED lights increasing the output and the left side ( - ) decreases in the same manner.<br />1 LED = 40 % power<br />2 LEDs = 55% power<br />3 LEDs = 70% power<br />4 LEDs = 85% power<br />5 LEDs = 100% power<br />The Eco button switches the unit to a higher power setting for 30 minutes (to heat the towel rail) the power level can be set in the first 30 minutes then switches to a lower pre-set power for 90 minutes (again this level can be adjusted during this phase). After 2 hours the controller will turn off. Both the 30 and 90 minute setting are saved in the controller. The Eco button can be used when the unit is powered off. </p> <p><strong>Key Features:</strong></p> <ul> <li>Height: 86mm</li> <li>Width: 86mm</li> <li>Depth: 26mm</li> <li>Maximum Element Output (Watts): 800</li> <li>Voltage: 230-245 (AC)</li> <li>Approvals: CE tested to EN55014-1:2006</li> <li>Material: Plastic</li> <li>Finish: Chrome</li> <li>Waranty: 12 Month manufacturer's</li> </ul>