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Need Modulating Vaporstat (3 Posts)
Need Modulating VaporstatIs there such a thing? Just upgraded a Smith 19A-6 with a new Powerflame CR1-G-12.
The problem: the system runs on 6 ounces and I learned the pressuretrol that controls the modulation doesn't go low enough to function. As a result, I can't modulate the burner.
Does anyone know of a control with a 120 ohm potentiometer that will allow me to modulate a low pressure system like this?
Boston, MASteve from Newton, MAThis post was edited by an admin on August 5, 2011 10:56 AM.
below 6 oz.can you replace the pressuretrol with a vaporstat. i think some of these modulating systems use 2 vaporstats-one to handle the transition from high flame to low, and the 2nd to cut the burner off completely if the pressure continues to rise even on low fire.
the 0-16 oz honeywell vaporstats would be right for you. --nbc
Available.... YES....Butyou have to combine a few components. If you start with an electronic modulating pressure control that accepts a typical 4-20 MA pressure sensor signal, you can simply swap in a pressure sensor that operates in a lower range. The lowest most controls some with is 0 to 30 psi, however, you can get sensors that operate at much lower ranges, say 0 to 15 ounces. The display will not be correct , but operation is uneffected. You would then just need to set up the operating range off a reliable vapor gage. Omega, ashcroft and others have pressure transducers.The Steam Whisperer (Formerly Boilerpro)
Chicago's Steam Heating Expert
Noisy Radiators are a Cry for HelpThis post was edited by an admin on August 6, 2011 1:16 PM.