What is this please?

[Kelly060479]

Hello,

We're boarding out our garage and wondered what this is please? It's located wired near the boiler and seems to be connected to an isolator switch which is wired to the boiler.

Can it be boarded around or could it be moved closer to the boiler?

Thanks in advance for any help with this?

Thanks
Kelly

 

[denso13]

Looks like a frost thermostat. Could you not just board behind it and have it on the surface of the boarding?

 

[Kelly060479]

There's wiring behind it. Could it be moved closer to the boiler or even disconnected? The garage is being converted into a room so will not be at risk of frost.

 

[denso13]

Could it be moved closer to the boiler or even disconnected?

You could do either.

The stat isn't to protect the garage but the whole house as it will turn the heating on if the temperature drops too low.

 

[Kelly060479]

Thanks for your help Denso, much appreciated!

 

[Madrab]

The stat isn't to protect the garage but the whole house as it will turn the heating on if the temperature drops too low

My understanding is that a frost thermostat is there to protect a boiler that's usually sited in an unheated space?

It's wired in such a way that when the air temp drops below typically 3Deg it can bypass the programmer/internal stat and cycle the boiler on to heat it up internally avoiding it from freezing. It doesn't actually activate the internal central heating (rads) though, that's all controlled by the normal programmer/room stat?

 

[stem]

It does appear to be a frost thermostat. Landis & Gyr were taken over by Siemens and if I'm not mistaken, this product was later known as a Siemens RAD1.F

Basically it is set to switch 'on' when the temperature of the area in which it is located drops below 5 degrees. What it actually switches 'on' will depend upon how it has been wired in and what it is there to achieve. It overrides any other controls and will switch the boiler 'on' even if the programmer is set so that the heating is 'off'.

The thermostat would normally be located in an area that contains part of the heating system that is at risk of freezing in cold weather. It may be just the boiler, or the entire heating system in premises that may be unheated for long periods of time, or perhaps just some parts associated with it that are at risk. The thermostat would be positioned and wired in such a way that whatever was at risk would receive heated water when the thermostat was triggered. If professionally installed, there may well be a pipe thermostat like the example below on the return pipe to the boiler wired in conjunction with it.

Its purpose would be that once tepid water (enough to prevent the risk of freezing) had circulated through the system pipework and radiators proportionate to the risk, the boiler would be switched off to prevent the radiators actually heating the property during periods when the heating was normally set to be 'off'. Once the temperature of the return water to the boiler fell this thermostat (provided that the frost stat was still below 5 degrees) would then warm the system again just enough to prevent the boiler / pipes / radiators freezing.

In your situation, if the risk of freezing is gone, then the thermostat can be removed.

 

[dilalio]

Looks to me like the "cover" of a frost stat