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Hi. I was recently performing a maintenance on at AO Smith BTH400 Cyclone. I don’t normally do a combustion but I decided to do one cause I suspected it wasn’t running right.
As suspected, I found my O2 very low at 1.9. Gas pressures are within range. No more than 1.5” drop. I used the regular gas adjustment to adjust my o2 up to 5.
There is an offset adjustment on this gas valve and I can’t figure out how to use it. Instruction don’t really explain it well.
Has anyone have any experience with these gas valves?
More specifically, using the offset adjustment?
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