Oil fired condensing boiler setup

[bennythedip]

Hi all,
First post here just looking for help or a link to setting up an oil fired condensing boiler. What is the ideal temperature for flow and return,is it 70/50, 75/55 and also what should the drop across the rads be? Should it be 12c or 20c. Thanks for any help

 

[Dotty]

What make and model Benny?

And :welcome2: to the forums!

 

[kimbo]

Grant boilers are set at 70deg flow and the aim is to achieve a 50deg return, the boiler will then condense

 

[Roger Welton]

I believe both grant and worcester state a minimum return temp of 40deg C to prevent condensate forming in the mild steel primary HEX not normaly a proble with rads though.

 

[bennythedip]

It's a warmflow 90 greenpak with a riello burner. Thanks for help. Should the rads be balanced differently ie with 20c drop instead of 12c?