On 12/11/2016 00:09, Mark wrote:
rick wrote:

Finally found the official answer - got a Tech note from Baxi, may be of
use for others:



System up to 75,000 Btu/Hr Ji in J2 in J3 in

System up to 100,000 Btu/Hr J1 out J2 out J3 out

Thermal Store compatibility J1 in J2 out J3 in



I admit i dont know much about thermal stores
but would have thought that it would be better to limit the flow temp to
63°C for optimum condensing temp
i.e J3 Out



Trying to get 'best advice' not easy ... but the above at least is how
jumpers work.
The store is set to 60C currently can't be set higher due to Underfloor
Heating - I may fit a blending valve to allow store temp increase but
limit loop to 50C

NuHeat advised setting temp on flow to 75C to ensure fast enough
recovery time on HW in tank when fro exampling running a bath.