Wiring Diagram For Tado Thermostat. Ask this old house plumbing and heating expert richard trethewey replaces an old thermostat with a smart thermostat without replacing the original two wires. By admin november 9 2017.
From there i am unsure where i connect additional wires from the boiler into the tado unit. The wiring diagram on the back of the device shows the wiring for the relay operation. There are three unlabelled isolated parking slots for unrequired wiring from the thermostat which is being replaced.
The wiring diagram on the back of the device shows the wiring for the relay operation.
I bought a tado to replace a honeywell t6360b but stupidly i forgot to take a photo of the wiring. If the smart thermostat is wired via relay step 5 configuration can be skipped. In operation i run my system with the old room thermostat permanently on but vest control of the system to the tado smart thermostat before tado the hall thermostat was set to fully on and temperature control was down to thermostatic radiator valves in every room. I have am ideal logic combo esp1 35 boiler i want to add the tado and there are only two wires in the existing thermostat.