Pressuretrol settings

Mike_Sheppard

What do you guys normally set this specific Pressuretrol at? Am I right I’m assuming this is not the best Pressuretrol to be used for low pressure steam heating?

Would you set this at 0.5 cut in with a differential of 1?

I’ve been seeing these a lot lately instead of vaporstats. The last one I came across had the (very small) building running at 9 PSI....

And a picture of the master trap that’s here just for some facepalms...

the_donut

Going to need more pictures and information. 9 psi is pretty high. Is that an equalizer with a open atmosphere drain or is that an overflow for pump?

newagedawn

that honeywell pressuretrol is a stand for low pressure steam turn it down to .5 and the system will work much better, unless there are other problems??

Fred

.5 and a Differential of "1" is the best you can do with that Pressuretrol. Below that, you'll want a vaporstat.

Mike_Sheppard

@the_donut - the master trap picture was just for fun. 9psi was another building not this one. I was just wondering if there was a reason I keep seeing people install this pressuretrol instead of a vapor stat.

@newagedawn - it's currently operating that way already. Was just wondering why people are using this control over a vapor stat.

@Fred - thanks. Not sure why people in this area keep using these over a vaporstat. It's rare that I even see a vaporstat anymore...

Fred

@Mike_Sheppard , That Honeywell 404A is the standard Pressuretrol used on most 1 and 2 pipe systems. Vaporstats are great but cost a little more and are typically only required on Vapor systems that must operate at or below 12 ounces of pressure.
I have a one pipe system and I happen to have both controls on my boiler. The Vaporstat is the primary control and the Pressuretol is a back-up, should the Vaporstat fail.

Mike_Sheppard

@Fred gotcha.