Thermal Coils & Combi's

[chester]

Hi

Have been trying to speak to baxi to check the compatability of my combi to accept pre heated water.

The boiler itself is a 105e fully modulating combi, there is obvioulsy some flexability in the system as during the winter the incoming tap water is around 7'C and it goes up to 14'C during the summer. However there must be more to it than that

Have checked the data sheets and no indication there,

Have just been on hold with the technical team for 45 minutes but had to go back to work

Does anyone know or will I be spending tomorrows lunch on hold

Cheers
Chester

[Ian]

Hi Chester,

I am surprised that your technical data sheets for your combi do not give a maximum input temperature - as far as I can remember all of the combis that I have ever seen do actually specify a maximum input temperature.

This is now pure guesswork on my part - I cannot guarantee my memory - but I think the normal maximum input temperatures that I can recall have been around 40° C - 45° C.

Having said that however, the normal central heating return under normal operation could easily have an input temperature of 50° C. to 60° C. and the boiler would have to cope with that without issue.

I think it would be wise to continue with the Baxi music on hold to verify for certain, unless you hear otherwise on this forum.

I hope this helps.

Regards,
Ian

[chester]

Ian

Thanks for a quick respone

http://www.baxi.co.uk/products/techdetails.php?type=specifier&idx=1082&cat=2

Hopefully this link works to the technical sheet, all as clear as mud
 
only positive side is the music is reasonable in the baxi call Q 

Cheers

Chester

[Ivan]

From your info, I am pretty sure this boiler would be ok, but the only people that can say for sure is Baxi. And from a liability point of view, I would have to refer you to the people that know for a definite answer.

That said, Baxi combis seem to be very suitable for solar preheated water up to 55C, from feedback I have had from customers. By the way, I will add a 'combi boiler thread. Perhaps when you get a confirmation, you can add a message with the boiler make/model as subject and the suitability/max input temperature details in the message so that we can start up a reference file? It won't help you, but it may well help others avoid the long hold calls (and I guess it will ease the strain from their techincal department)

Good luck!!


Ivan