How to Adjust an Electric Steam Vapor Pressure Switch

A steam heating system is similar to a hydronic system in that it delivers the heat around a house via a set of pipes and radiators. A pressuretrol, or steam pressure switch, is installed on the boiler to control the low and high pressure point in the pipes. These settings are vital for the system to operate safely and efficiently. Never adjust these settings unless you have a strong understanding of the proper levels.

Things You'll Need

• Boiler owner's manual
• Screwdriver

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Instructions

1. • 1

     Locate the boiler's cut-in and cut-out pressure settings in its owner's manual. These are listed in psi (pounds per-square-inch).

   • 2

     Turn the cut-in pressure adjustment screw with a screwdriver to the set point outlined in the boiler owner's manual.

   • 3

     Turn the cut-out pressure adjustment screw with a screwdriver to the set point outlined in the boiler owner's manual.