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PostPosted: Mon Nov 26, 2018 12:00 pm 
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Hello, new here and hoping for some help.

I've looked for other topics around installing a Nest thermostat with a Sime Super 90 (or any Sime) boiler and can't find anything so hoping someone here can help as I'd like to avoid paying £80 for an install charge (London prices innit!).

The setup looks simple enough but I'm not 100% sure which install I should use (230V combi or low voltage).

The Sime manual says that the room thermostat should be 230V. It currently links to a Honeywell T6360 room thermostat.

I'm hoping that the following is correct as it seems the simplest:
1. Connect the Heatlink to L and N from the boiler power input.
2. Connect 2 & 3 on the Heatlink to 22 and 23 on the Sime board (the room thermostat input).
3. Connect T1 and T2 on the Heatlink to the Nest Thermostat.

Would that work?

Many thanks in advance.


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PostPosted: Thu Nov 29, 2018 1:50 pm 
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Update - I wired the boiler as described above and it all worked fine!

I did have to use a separate power source though as the boiler had no 240V out so I just attached a 3 amp fused plug to the Heatlink and it works perfectly. Looks like a nice piece of kit.


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