Pressuretrol settings

skimmer

before:

after:

now I have to repack the nut on one of the radiator stems that’s leaking.

What do you think of the new settings?

EBEBRATT-Ed

Widen the differential to 1 psi.

What you want is the boiler to shut off at 1 1/2-2 psi. You want the boiler to restart at as low of a pressure as you can adjust it for ….just before the gauge needle hts 0 psi. Yo may need a 0-5 psi gauge to adjust for this as doing it with a 0-30 psi gauge will be difficult if not impossible.

CoachBoilermaker

There was a good tip in here about tightening the packing nut.

Tighten it while the heat is running, so you only tighten enough to silence it, and not more

https://forum.heatinghelp.com/discussion/198467/how-do-i-fix-this-steam-radiator-inlet-valve-from-leaking

skimmer

yep I repacked it while cold and then had to tighten while the heat was coming up as it still leaked until it stopped

skimmer

I am thinking of removing the pressuretrol and putting in a vaporstat.

What would be a good starting point for settings??

Jamie Hall

Right where that one is set.

However! Being absolutely level is critical with the mercury vapourstats. Even a tiny bit off can throw it several ounces out of calibration. Be sure that the pigtail on which it is mounted has the curl perpendicular to the body. I also recommend putting a quality low pressure gauge on the same pigtail to see what it really is doing, and adjusting the instrument to match the gauge.