Pressuretrol Settings

Old 08-14-18, 08:58 AM
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Join Date: Jun 2017
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Pressuretrol Settings

I have a Burnham MegaSteam boiler Model MST396 ST-HB with a Honeywell pressuretrol Model L404F1367. This is the subtractive type. The house is fitted with Hoffman 1A Adjustable steam vents. I would like to know how I should set the pressuretrol. Thanks for the reply.

Old 08-15-18, 02:37 AM
Join Date: Jan 2017
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Set the main (right hand) scale to 2 psi and the differential setting to 1.5 psi. This should yield a shut off of 2 psi and a turn on of 1/2 psi. The maximum steam pressure should never exceed 3 psi on a 1 pipe steam system. Just to be sure; how many pipes are connected to any of the radiators? The answer should be 1.

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