Connect with us

Triac/Thyristor delay off timer.

Discussion in 'Electronic Repair' started by Tom, Oct 4, 2004.

Scroll to continue with content
  1. Tom

    Tom Guest

    I'm looking for a circuit for switching off a Central heating pump after a
    delay up to (max) 2 mins adjustable (after boiler has ceased firing) using
    SCR , Triac or similar, 240 V @ 2Amps approx max.
    regards
    Tom
     
  2. NSM

    NSM Guest

    | I'm looking for a circuit for switching off a Central heating pump after a
    | delay up to (max) 2 mins adjustable (after boiler has ceased firing) using
    | SCR , Triac or similar, 240 V @ 2Amps approx max.

    You should be able to find an industrial timer to do this.

    N
     
  3. You can buy run-on timers for bath/shower room fans.
    You might have to uprate the triac as such fans are
    normally only around 20W. Standard domestic central
    heating pumps are normally only up to around 120W
    on max setting which is a lot less than your 2A.
     
  4. Tom

    Tom Guest

    I'm looking for a circuit for switching off a Central heating pump after
    a
    Thanks Andrew, I like to have a high factor of safety in my little circuits,
    for a one off for my own use the extra cost is immaterial.
    However, Set square has come up with a nice solution on uk.d-i-y using a
    pipe stat.
    I think it may work, any observations?
    Best Regards
    Tom
     
  5. James Sweet

    James Sweet Guest

    120W? More like 1200W for a 1/2HP blower commonly used for circulation with
    the heat pump. The condensing unit itself draws significantly more than
    that.
     
  6. You're talking about something quite different.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-