SomethingOrOther-
Good timing! The Shelly and wall switch arrived yesterday, looks like a nice well thought out piece of kit once unboxed. I went about trying to fit it immediately, using the wiring diagram in the wall switch packaging, and it would switch the boiler on/off using the physical switch but not the app. I then switched to the wiring using the diagram for the Shelly 1pm with a standard physical switch and it would switch on/off using the app but not the physical switch. Furthermore, the little square on the light switch doesn’t light up when “on”, so the only way to know if the boiler is on is to go outside and listen to it.
I think bridging the connection between L and L1 might solve it, but tbh it’s just slightly off the mark so I refitted the timer clock and am pondering my next step.
Of course if you weren’t bothered with having a physical switch, then it would be perfect, but my wife is anti-tech so it needs to have a physical switch with an indicator to pass the WAF.
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Colm89
I don’t think these are rated to be used directly with an immersion heater, in fact I don’t think any current switches on the market are.
I’ve been planning out how to automate my central heating and immersion water heater over the past fortnight and the conclusion I’ve come to is that you should use a contactor to control your immersion heater, and use a smart switch/relay to control the contactor.
My plan is to get two Shelly 1pm relays and two matching Shelly 1 gang wall switches and use one relay in place of my apt time clock switch for the central heating, and one to control a contactor for my immersion.
I’ll then get a zigbee trv for every radiator, and manage everything through home assistant.