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Pump with speed digital control

abineri
abineri Member Posts: 5
in Radiant Heating

I am looking for circulation pump for radiant heating whose speed can be controlled digitlly ie by an arduino or other microprocesssor. Do such pumps (about 1hp) exist and, if so, where might I find such a pump?

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,479

    Think you would have to use a VFD and a standard motor. Not sure if there are any pumps in the 1hp range that can be directly controlled.

  • Kaos
    Kaos Member Posts: 219

    You want something with a 0..10V control input. This is one of the cheaper options (Ecoric+ only). These can usually be also driven by PWM so easy enough to connect to uP.

    https://www.xylem.com/en-us/campaigns/act/ecocirc-20-18/

    There are many others out there as well with 0..10V input.

    The other way to get speed control is to use a wifi dimmer switch and plug in a regular PSC circulator. You can then control the pump speed by driving the dimmer.

  • Jamie Hall
    Jamie Hall Member Posts: 24,859

    Aside from the control thing… what on earth are you driving that you need a 1 hp pump?

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    GroundUp
  • rynoheat
    rynoheat Member Posts: 27

    I found this pump:

    https://www.nationalpumpsupply.com/60b0b1000-ecocirc-20-18-cast-iron-high-efficiency-circulator/

    It looks like it can be controlled with an 0-10v signal, and also has some kind of app. Says it's comparable to a Taco 007e, so 1hp.

    Can't vouch for it in any way.

  • Jamie Hall
    Jamie Hall Member Posts: 24,859

    Um… the Taco 007 series has a maximum power rating of 44 watts… about 0.05 horsepower. 1 horsepower would be 745 watts…

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • rynoheat
    rynoheat Member Posts: 27
    https://forum.heatinghelp.com/discussion/comment/1824945#Comment_1824945

    Oops, the product details were wrong on the website I was looking at.

    Yeah, that'd be a huge pump.

  • abineri
    abineri Member Posts: 5

    My apologies, I need about a 0.2 hp with digital speed control.

  • hot_rod
    hot_rod Member Posts: 23,396

    we used to call those small circs 1/12 hp. Larger high head models were 1/6 hp

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • 109A_5
    109A_5 Member Posts: 1,672

    The use of 0-10 VDC is very common in the motor control world. You would need to connect a Digital to Analog Converter (DAC) interface to an Arduino (only some Arduinos have a built in DAC), how many bit resolution do you need. Or a PWM through an integrator circuit and buffered by an OpAmp to get to 10 volts.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • hot_rod
    hot_rod Member Posts: 23,396

    What is the criteria for varying the speed? Based on what inputs?

    The Grundfos Alpha and other brands have an app for adjusting speed, collecting data.

    Screenshot 2024-12-05 at 7.46.42 PM.png

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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