Fitting thermostat to combi

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stupot76

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• 23 Nov 2007

• #1

Hi all,
I just want to check something, before I buy...
I have a combi boiler which doesn't have a room thermostat and I'd like to include a room thermostat. The boiler is a Sime Mk II, and it says I can fit a thermostat to across two terminals - no problem.
I just need to confirm that most wireless thermostats will also require me to provide mains power directly (ie. it'll be volt-free connection to boiler)
Thanks a lot for any confirmation (or indeed, for putting me straight if I've completely missed the point!)
Stuart

 

ChrisR

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• 23 Nov 2007

• #2

Yes. All wireless thermostat receivers need a mains supply, and provide volt-free contacts you can use.
The transmitters mostly run on batteries, which last several years.

 

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stupot76

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• 23 Nov 2007

• #3

Cheers Chris for your speedy response.
Is it possible (sensible?) to take power from the boiler itself to avoid having to install a whole load of new wiring / switches / fuse box etc?
Stuart

 

ChrisR

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• 23 Nov 2007

• #4

Certainly, then the power to all the "heating" stuff goes on and off together.
It's usually done with a piece of 5 core flex. LNE plus the two volt free ones.

 

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• 23 Nov 2007

• #5

Cheers!
Thanks for your help!
Stuart