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burner pressure and gas rate dont tally up

Discuss burner pressure and gas rate dont tally up in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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princegoose

Hi, was servicing my brothers old boiler the other day, after boiler fires up theres a slight smell of gas then burner sounds pretty erratic. Checked burner preuuser which was a bit over maximum. adjusted it to just above minimum and seemed to work and sound a lot better at startup, however the gas rate was more than 5% (and more than 10%) below what it shuld have been for the burner pressure I set. Any one know any reasons for this?
 
had you got appliance on full for 10 mins, check pipe sizing to appliance, or maybe injector to blocked or to small,
 
yeh as above, blocked injector, pipe sizing check

try the stats again after running for a bit
 
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