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Glenn Stanton

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lchmb
lchmb Member Posts: 2,997
Glenn, not to long ago we had discussed using a coil on the megasteam for a small heating zone. You had mentioned at the time making sure to size the circulator to overcome the head pressure but I completely blanked it. I was wondering if you could help me out here a bit, I'm a little weak on trying to figure this out. I will be heating two small heating zone's on the second floor of a home so the rise will be roughly 9 feet. What size circulator would I need to move the water through the coil? I will be pumping away... Any help is appreciated...


As an afterthought, would it be possible to put a less restrictive coil in to replace this? Thanks for your help in this...

Comments

  • Tom

    Tom,

    Depending on the btuh load you are installing and the length of your longest zone circuit and the fittings the pump sizing may change. Based on 4gpm (40,000) the head loss through the coil alone will be about 13.5 feet of head. Add the pipe and fittings and you may be covered with a Taco 008. Any long runs or greater amounts of baseboard and fittings may change this. Really need the total developed length of the longest circuit, pipe and fittings as well as total btuh load to figure this correctly.



    Glenn Stanton

    Manager of Technical Development

    Burnham Hydronics

    U.S. Boiler Co., Inc.
  • lchmb
    lchmb Member Posts: 2,997
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    True gentleman

    You sir are a true gentleman, have I said thank's lately?
    I did finally get my brain to work and with the total piping and what not should be in the area of 16 ft. Due to this we opted to use the Grundfos 3 speed circulator. It give's me the option of up to 20 ft so if there is any issue I have it covered.

    I did on another matter talk with Burnham's tech support today and per the norm they were a pleasure to deal with. We hope to be able to finish the boiler in short order but here's a pic. I promise to be very gentle moving it in to it's final location.

    Again, thank you for your time!!
  • Joe Mattiello
    Joe Mattiello Member Posts: 706
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    See attached technical document TD10 for help sizing circulators in the future. Glen mentioned in his reply to your inquiry, the importance of calculating the system pressure drop for correctly sizing the circulator. This document will methodically take you through the process, and save you money when selecting a circulator. Apparently, the three speed Grunfoss pump was selected because you didn’t really know the pressure drop. The correct speed has to be selected so you do not exceed the maximum velocity to minimize pipe erosion, and noise.
    Joe Mattiello
    N. E. Regional Manger, Commercial Products
    Taco Comfort Solutions
  • Thanks Joe

    Thanks for the documentation Joe. Say, is that you in the trifold brocures I am seeing on some of the local distributor's counters? Also, will you be joining us at Gilette Stadium next week?

    Glenn Stanton

    Manager of Technical Development

    Burnham Hydronics

    U.S. Boiler Co., Inc.
  • lchmb
    lchmb Member Posts: 2,997
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    Thanks Joe

    I'll add that valuable information to my library. We did in fact take a shot in the dark to get the piping done with the expectation of replacing them if needed. Fortunately if my calculations' are correct we lucked out. I will in the future use this information to make my job just a little easier. Thanks for the help..
  • Joe Mattiello
    Joe Mattiello Member Posts: 706
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    No that's not me. I'm much better looking; LOL! Just kidding. Attached is a resent photo of me at Taco, sitting at my desk. Yes, I'll be working the show. Really looking forward to it.
    Joe Mattiello
    N. E. Regional Manger, Commercial Products
    Taco Comfort Solutions
  • Great!

    I'll see you there!

    Glenn Stanton

    Manager of Technical Development

    Burnham Hydronics

    U.S. Boiler Co., Inc.
This discussion has been closed.