Electronic control question.... 2-10VDC output limit??

[Scooter2112]

I’m nearly there.
Working on these things is a fuckin whipping post. They haven’t worked reliably since they were installed. Even when they were bone stock they didn’t work, according to my boss who was there when this whole addition to the hospital was built.
Their curves don’t even start til 20gpm. Collectively, they share 14gpm.
This one originally had a 2” steam valve with a 43gpm Cv rating. I replaced it with a 1-1/4” valve with a 18gpm Cv rating, and I wanted to drop it to 3/4” (7gpm Cv) but got overruled.
And they’ve been fighting me on putting the controller’s bulb in a thermowell because “the others work without it”.
Yeah…. You mean the other smaller heaters with smaller steam valves?? Those??? The ones that also overshoot, just not quite as badly???? Are those the ones you mean??????

I’ve pointed out a list of reasons why these were the wrong heaters and installed incorrectly, then I’ve offered the lowest-hanging fruit for mitigating that with likely the largest impact on controlling these monsters, with the cheapest component catagory and the easiest installation.

But I just spent 10 years working exclusively on 900lb superheated steam ships, and went to two shipyards on steam ships, and spent the rest of the time on ships with auxiliary boilers.

What would I know?

Isn’t it great when tasked with field engineering something that a licensed engineer couldn’t engineer in the first place. And nobody believes your solutions because you don’t have the piece of paper, despite more years beings hands-on in the field than said engineer probably has on the planet?

Happens every day.

 

[danohat]

I did that. Went to the hospital.