Honeywell L641B Low Limit Pipe Thermostat
Honeywell

Honeywell L641B Low Limit Pipe Thermostat

Honeywell

Product Code: L641B1004

£31.32
Ex Tax: £26.10
Quantity:  
 

Honeywell L641B Low Limit Pipe Thermostat

Surface mounting low limit pipe thermostat complete with fixing springs and tamper resistant decal to cover setting adjustment. Temperature setting range-10 to 40°C.

Normally same day dispatch

Question

Hello - I have a woodburning stove with internal boiler heating 5 radiators and (through a coil) the water in the hot water cylinder (when the fire is out this has an immersion heater).  There is a two speed pump next to the stove and presently I switch this on to the lower speed when the fire has been lit for some time and I think the water is hot enough to circulate.  If it gets too hot (a windy day) I put it on the 2nd speed.  As you can imagine this is not ideal and whilst there is a vent into the header tank in case of boiling I would be happier if this was automatic as of course when the fire goes out or is running low I have to remember to turn the pump off otherwise cool water is running through the coil in the cylinder and cooling the previously electrically heated water. Is there a pipe thermostat (28mm pipe) you can supply that I can fit close to the boiler wired to the pump nearby that maybe has a two position output or can you recommend a better solution

Answer

Thank you for your enquiry - Please find product page link for the Honeywell L641B1012 high limit pipe stat which clamps on, and is commonly used in solid fuel systems for switching on the pump when the Selected water temperature is met in the pipe. https://www.uk-plumbing.com/honeywell-l641b-high-limit-pipe-thermostat-p-1487.html In many cases a low limit thermostat is used on the return pipe to switch off the pump also as https://www.uk-plumbing.com/honeywell-l641b-low-limit-pipe-thermostat-p-1486.html You can find download information leaflets on controlling solid fuel heating systems from the link below http://www.solidfuel.co.uk/