Why does a solid fuel Rayburn need an electric supply?

[reb78]

As above. Why does a solid fuel Rayburn need a 240v 3amp supply? I saw this model on ebay

https://www.ebay.co.uk/itm/Aga-Rayb...42a44c3:g:EOAAAOSwaP5cXSWS&LH_ItemCondition=4

What does it do in a power cut?!

 

[julianf]

I'm not familiar with that exact model, but, I would assume, the heating programmer would stop working.

Why not just download the manual?

My only assumption is that they're tried to "value add" by internalising some CH pumps / valves etc.?

Basically a raburn is a fire next to a tank of water. Anything else is a bit of a sales pitch, I think. I would rather have all that kit just generic stuff on the wall behind the rayburn, rather than expensive hard to replace integrated.

But I may be mistaken. Like I say, why not just rtfm?

 

[brightspark]

more than likely for the pump and thermostat for heating. if they get too hot the thermostat and pump circulate the heat through the radiators as well as use for the heating

 

[julianf]

Also, if you want a shiny one, why not just buy a used one for cheap, and send it somewhere like kingfisher, with a cheque for a grand (just like these resellers do) and end up about £1k better off at the end of it?

 

[julianf]

more than likely for the pump and thermostat for heating. if they get too hot the thermostat and pump circulate the heat through the radiators as well as use for the heating

I'm in agreement with you, but I'd add that building control will still want the unit installed in such a way that it can thermosyphon in a powerful outage, with appropriately sized heat leak etc. so any electrickery in the appliance will be superceded to some extent by installation and regulations.

I'd trust a standard unit with one of those thermovar loading valves much more than a load of electonic control from a company who makes very old style cookers..

 

[julianf]

Eg -

http://lauridsenindustri.dk/en/solid-fuel-boiler-equipment/2221-thermovar-set.html

Kind of like a car stat. You have a probe in the flue gas to turn it on and off, and it's approved to be fitted (ie for a vented system)

Used on proper solid fuel boilers a lot abroad, I think.

 

[julianf]

This is the website I was looking for -

http://laddomat.pl/index.html

 

[steviec_lj]

In order to maximise the life of your boiler body, an electrical thermal re-set low temperature boiler thermostat has been fitted within the appliance, behind the LH side removable cover, whose purpose is to isolate the electrical power from the water circulator when the boiler thermostat falls below 60oC (140oF) and thus minimise harmful condensation on the boiler surfaces. The 3 core 0.75mm2 cable lead from the appliance must be connected to/from the water circulator as indicated on the ‘Typical Wiring Diagram’ in Fig. 6. Marked ‘Boiler Low Temperature Return Thermostat’ - This switch is normally closed during cooker operation and will open when the water temperature falls preventing chilling of the boiler.

From the manual

 

[waddycall]

I reckon they got the blurb mixed up. It says it goes on fully pumped open and sealed systems. Sounds more like a gas or oil model to me.

 

[steviec_lj]

I reckon they got the blurb mixed up. It says it goes on fully pumped open and sealed systems. Sounds more like a gas or oil model to me.

Far from it, albeit a discontinued model..

http://www.rayburn-web.co.uk/Prodin...45W/Rayburn 345W Instal 10-09 EINS 515578.pdf

 

[waddycall]

Those instructions state that the flow pipe must have an open vent and that there is no requirement for an electric power supply. Wrong blurb.

 

[the artfull-codger]

As Steveij quoted from the manual, it's a low temperature thermostat integral with the cooker, when the [external] central heating pump starts to pump water to the radiators the water temp in the firebox naturally lowers and if it falls below 50degrees.C it will isolate the pump to reduce corrosion to the boiler,it will switch back on when the temp increases, I've had my 355 SFW for about 10 yrs & haven't connected mine up, it's a solid fuel & wood burning with gravity feed to a copper storage tank via a neutraliser which is also fed from a stove back boiler in another room.

 

[waddycall]

eBay also says it has an integral programmer!