This Choice basic mechanical room thermostat is an economical and simple to use room thermostat. Simply turn the mechanical control dial to your desired temperature to control your room temperature. This unit also produces an audible “click” when you turn the dial past the current temperature so you know when the system is being turned ON or OFF. This mechanical 2 wire thermostat is very easy to install and having volt free contacts is suitable for systems with either a combination or normal boiler. If you have a three wire installation, simply cut back and make safe the neutral and this two wire thermostat will give you years of faithful service. FEATURES Dual diaphragm temperature sensing elementSuitable for surface or patress box mounting10 to 30°C Set point range10 Amp current ratingErP Class I2 Wire InstallationThree terminal heating/cooling changeover SPECIFICATION Power Supply: 230V Ac, 50-60HzTemperature setting Range: 10°C to 30°CCurrent Rating: 10(3) AmpTerminal Differential: Approx 4°COperating Temperature Range: 0°C to 40°CDimensions: L83 x H83 x D37Complies with: EN60730-1, En60730-2.9, EMC Directive 2004/108/EC, LVD Directive 2006/95/EC WIRING For volt free applications connect to terminals as follows:1 - Input3 - Heating Output4 - Cooling Output (optional) DOWNLOADS Choice RSTAT1 Datasheet [PDF] Choice RSTAT1 Instructions [PDF]