Room Sensor Wiring Diagram With Thermostat. See wiring diagram fig. Optimum performance is attained with 3 wire.
For four wires the wires youre going to need to know for this setup. Refer to table 2. Currently i have the following running into my old thermostat and i am try to work out which wire goes where on the new thermostat.
The heating system must be appropriately fused for attached appliances.
Evohome installation guide 1 thanks for choosing evohome. 3 3 1 compressor stage 1 compressor stage 2 return air sensor. This 3 wire thermostat offers powerful capabilities with simple easy to use menus. The setting range may be limited or a particular setting locked through the use of the mechanism to be found under the control knob.