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help
Posted: Fri Mar 06, 2009 2:57 pm
by heating09
oil boiler on balanced flue
increase the air on the burner to obtain the correct combustion reading
but increasing the air seems to blow the flame out
any suggestions on how to remedy or why this happens
Posted: Sat Mar 07, 2009 4:33 am
by Steve the gas
Hi,
Your getting flame lift - too much air.
Are you qualified?
If not, get an Hetas person in?
Posted: Sat Mar 07, 2009 5:07 pm
by stoneyboy
heating09,
The equipment you are using to test the combustion gases is giving the wrong reading.
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Posted: Sat Mar 07, 2009 9:42 pm
by heating09
yes qualified, why is the flame blowing out????
nothing to do with meter,
had to leave it burning rich with high co
why cant i increase the air with out it tripping out
nozzle may be ???
any suggestions
Posted: Sun Mar 08, 2009 4:25 pm
by stoneyboy
heating09,
Have you checked the pressure to the nozzle, is it set as in the operating manual? Have a look in the manual and see what nozzle is recommended. If you are using a hollow pattern nozzle, try a solid one and vv.
When you now refer to "tripping out" do you mean this or that the flame becomes unstable and blows out.
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Posted: Mon Mar 09, 2009 8:12 am
by heating09
nozzle pressure ok
flame begins to blow out every 5 mins or so when correct co2 is reached
flame only stabilises when burning rich i.e 13% co2
this isnt any good cause the co then goes to 300ppm
Posted: Mon Mar 09, 2009 9:24 pm
by stoneyboy
heating09,
Have you tried a new nozzle? Is the correct size nozzle fitted ie one which matches the boiler. Check the manual and see if the burner has been replaced with one which is too big for the boiler. Have you checked the relationship between the nozzle and the air spinner plate does this match the spec in the manual?
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