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Can someone explain what this is for in these boilers Minimum Adjustment Potentiometer ?
I'm servicing one tomorrow. I'll clean it out check all seals,tightness and letby test, burner operating pressure at max with hot water no more than 10 mb on max and then c h on min 1.9 mb I think. There's a combustion button that you press for maxim rate then you can take a gas rate. More advice would be greatly appreciated. Theses boilers and kinda new to me. I've read the manual so I don't look like an idiot when the customer is watching me complete this job.
I'm servicing one tomorrow. I'll clean it out check all seals,tightness and letby test, burner operating pressure at max with hot water no more than 10 mb on max and then c h on min 1.9 mb I think. There's a combustion button that you press for maxim rate then you can take a gas rate. More advice would be greatly appreciated. Theses boilers and kinda new to me. I've read the manual so I don't look like an idiot when the customer is watching me complete this job.
