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Primary Secondary sizing

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Alan(CaliforniaRadiant)Forbes
Alan(CaliforniaRadiant)Forbes Member Posts: 1,243
in THE MAIN WALL
is usually very small, we typically use a Taco 005 on small, medium and even large systems. It will handle 15 gpm at 4' of head which is 150,000 BTU's at a 20* delta T; that's a lot of heat.

As far as lifting the flow checks, if you pipe with closely spaced tees off your primary loop, the pressure differential created by the primary pump will not "see" any secondary piping.

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Comments

  • Bill_5
    Bill_5 Member Posts: 1
    Primary Secondary pump sizing

    What is the best way to size a primary pump. I am looking a the tekmar application #262-2 and I would like to know how to size the P1 pump. I have sized P1 for the total system load in the past and have used circs to zone with and what happend is the P1 pump winds up raising the zone flow checks. tekmar drawing is at. http://www.tekmarcontrols.com/acrobat/a262.pdf

    Bill
  • Mark J Strawcutter
    Mark J Strawcutter Member Posts: 625
    wrong drawing?

    Unless I'm looking at the wrong drawing, 262-2 doesn't have any zone circs.

    Mark
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