Warmflow 70/90 Bluebird recommended nozzle and angle

[jack7g]

installed a warmflow 70/90 bluebird boiler with a 0.55 x 80 degree nozzle.
boiler is only heating 5 radiators in a small 2 bed house.
what is the recommended nozzle size and pitch for this boiler?
Can I change the nozzle size and pitch to use less oil as the flame is hitting the back wall of the boiler and radiators are getting too hot?

thanks.

 

[SimonG]

It will tell you in manufacturers instructions what size nozzle to use to de rate it.

A 70/90 will be factory set to 80,000 btu's but they give you the info for the 70,000 and 90,000 btu's output.