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Hi hope someone can help me. I’m planning to install a nest 3rd generation thermostat to control my Vailliant ecotec combi boiler. I will be locating the nest thermostat in an alternative location to the existing thermostat so no wiring for thermostat other than plugging it it is required. My current thermostat is a simple Danfoss wired dial thermostat.
Whilst I’d be happy to remove the boiler casing to access the internal connections, if it’s not necessary to connect the heat link I’d rather not. My question is:
I can power the heat link by wiring it to the fused spur that provides power to the boiler which is straightforward enough but is it possible to use the existing wiring of the Danfoss thermostat to make my control connections to the heat link? I would just need to identify the existing thermostat cable leaving the boiler and cut it to facilitate connection to the heat link. Will this work?
Whilst I’d be happy to remove the boiler casing to access the internal connections, if it’s not necessary to connect the heat link I’d rather not. My question is:
I can power the heat link by wiring it to the fused spur that provides power to the boiler which is straightforward enough but is it possible to use the existing wiring of the Danfoss thermostat to make my control connections to the heat link? I would just need to identify the existing thermostat cable leaving the boiler and cut it to facilitate connection to the heat link. Will this work?