FieldBench
Bryant codes

Bryant

Flame

Protect

Flame sense

Flame present then dropped, or µA too low to prove.

Walk Flame in Diagnose

Sign in for the next measurement

First check

1 Measure µA while it is running

Do not clean first and guess. Series-µA the rod on Bryant 581J during a call. Falling µA is oxide, ground, or a dying flame. A hard drop is often the pressure switch or limit opening, not the rod. Rod position, oxide, ground to the heat-exchanger box — painted screw fails this.

Expect: Flame rod: µA DC per the IGC sticker in this heat section. Rising while running.

The rest of the walkthrough is Diagnose.

On the plates

  • Rod position, oxide, ground to the heat-exchanger box — painted screw fails this.
  • µA DC on the IGC sense lead. Rising while running is the goal.
  • Valve that chatters from low inlet pressure looks like a dirty rod.

Plates that use Flame

Same number, other makers

Flame on Bryant is not the same code on these plates.