Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Pressuretrol answer

A week or so ago there was a question about settings on the Pressuretrol. Here's the answer from the Honeywell product manager: "The correct setting and wiring is determined by the boiler OEM not Honeywell. It would also depend a lot on what OS # they have installed as some are subtractive differentials and some are additive. Since we don’t know how the two are wired into the control system you cannot tell which one is in command and which one is the backup."
This discussion has been closed.