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.

LWCO 120volt replacement

steamer02180
steamer02180 Member Posts: 8
in Strictly Steam
All, my boiler shut off due to a faulty LWCO. Was told it was 120V and usually they are 24V and he is trying to locate one. ARe the 120V hard to find and is an electrician needed if we put in a 24V instead. Can this be done by yourself? Any recommendations will be helpful. Located in MA and snowing now.

thanks

Comments

  • Gilmorrie
    Gilmorrie Member Posts: 186
    supplyhouse.com has 120-V models. If you want to use a 24-V LWCO, you will need an interposing relay.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,856
    Both 24 volt and 120volt models are available at any good supply house. It's not an issue getting one
  • steamer02180
    steamer02180 Member Posts: 8
    So my old on is a Honeywell rw700a1080 120V. What would be the best replacement without having to rewire anything
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,856
    PSE-801-120 McDonnell Miller Supply House.com

    That's 120 volt. There are many to choose from
  • Fred
    Fred Member Posts: 8,542
    Are you sure the LWCO is bad or is it just that the probe needs to be cleaned/replaced?
    SeanBeansSuperTech
  • SeanBeans
    SeanBeans Member Posts: 525
    I agree with @Fred
  • steamer02180
    steamer02180 Member Posts: 8
    So looks we might have a strange one??? It’s 120volt with a 24v step down transformer in it. Anyone here of that.
  • ethicalpaul
    ethicalpaul Member Posts: 6,982
    If this were my system, I'd rip out all the 120 and replace it with 24v stuff. I don't want all that line voltage running around my boiler. Anyone else feel that way?

    NJ Steam Homeowner.
    Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
    See my sight glass boiler videos: https://bit.ly/3sZW1el

    SeanBeansSuperTech
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,856
    Gas is usually 24v oil is always 120 volt. Some think all safetys should be in the line voltage if possible. Better class of wiring
    ethicalpaulSuperTech
  • ethicalpaul
    ethicalpaul Member Posts: 6,982
    Ahh good to know. But the beauty of 24v is you don’t need that better wiring 😅

    NJ Steam Homeowner.
    Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
    See my sight glass boiler videos: https://bit.ly/3sZW1el

    SuperTech
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,856
    @ethicalpaul

    I would rather work on 120volt and up any day. Nothing wrong with 24 volt....it's the way many people install it. Sloppy, strung all over the place, loose connections etc

    Because 24v cant hurt you it gets very little respect from installers and when used to wire safety controls that's not good. Those controls are important no matter which voltage they use
    SuperTechSeanBeans

Categories