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.
If our community has helped you, please consider making a contribution to support this website. Thanks!

SR501

Options
nick z.
nick z. Member Posts: 157
in THE MAIN WALL
Looked at a replacement boiler replacemnet job.There is 2 zones, and a P/S pump just for a loop of radiant.So there is a total of 3 pumps. Every pump has its own SR501 with all the controls wired into the boiler control to start the boiler on a call for heat.So in other words there are 3 t-stats wires all goig on the boiler control.Seems it wouldn't be good for the control to have all 3 zones sending voltage to it at once.Do I need to figure on a # zone control in my price? Thanks Nick

Comments

  • Steve_2
    Steve_2 Member Posts: 1
    SR501

    The SR501's are not sending any voltage to the boiler. Each 501 has a dry contact that closes when the t-stat calls for heat. These would then be wired to the T-T terminals on the boiler.

    If you had used a zone controller, the zone controller would have a common dry contact essentially doing the same thing.
  • nick z.
    nick z. Member Posts: 157


    Thanks ,I always assumed that it sent 24 volts to the T.T.Thanks for the response.
This discussion has been closed.

Categories