Answer / bala

Flame Scnner Basic function- viewing flame in furnace

It has provided in order to avoid unwante boiler trip

Pull in / pull out manual set value from 0 - 100 %

pull in always higher than pull out eg- 40 % & pull out 20 %

when initial flame exceed above 40 % it will consider as
flame

when flame drop drop from 40 - 20 it will consider as flame

when drop below 20 % it will take as no flame signal

the o/p contact flame / noflame will be taken for boiler
safty operation

why we go for pcbs

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