Never build pressure

Mark Hunt

is all you need.

Mark H

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Foreman

Never build pressure

On normal heating cycles I never build steam pressure for pressure-trol to shut burner down, unless I raise temperature on Stat aprox 4 degrees. (in other words, keeping the burner on longer)
Pressure and differential are to set to lowest setting.
Is it normal NOT to build any measurable pressure with a normal cycle, unless burner stays on longer?
Mains are insulated and no leaks or faulty vents, boiler sized properly also. Would a vaporstat shut down burner, while still producing steam and rad vents still open?
What Im aiming for is maintaining steam, while burner cycles on pressure.

Mike L

steam pressure

does the system produce heat? It doesn't matter if your making pressure if your making enough heat,but how long does the system run 10/15/20 minutes? you could be underfired.I dont really have enough information to answer your questions.Get back today and i'll check in again tonight

Foreman

Oh I make plenty of heat, on cycle duration lasts about 10-15 minutes. Pressure is 11 inches WC {Propane}

Mark Hunt

Steam pressure

Most systems were designed to operate on ounces of pressure, not pounds. The pressure gauge on your boiler is meant to read pounds and unless something was REALLY wrong, you'd never see the needle move.

The Pressure-trols that come as standard equipment with steam boilers are not very good and will most likely never shut the system down on pressure. They just aren't accurate. The way to solve this is to install a Vapor-stat. It will cycle th burner on ounces of pressure. As it is now, your thermostat is controlling the burner, not the pressure-trol. Even when the contriol is set to the lowest possible setting.

Hope this helps.

***EDIT: Your system is "building pressure" otherwise the steam would stay in the boiler. It's just that it only needs ounces and the current control cannot measure that.

Mark H

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Foreman

Thanks for your replies, just thought my burner would toggle the burner on and off while its in the on cycle.
I see 2 Honeywell vaporsats that may work, one is 0-4psi, the other 0-16 ozs