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347
347 Member Posts: 143
Happy Holidays to all,
I'm installing a standard cast iron boiler with an indirect water heater, three high temp baseboard zones and adding two radiant heat zones (14k heat loss on both). I would like to do primary secondary piping to reduce the possibility of condensation when the radiant zones are calling.
I can't remember if I should install the piping for the indirect before (one tee before and one after) the closely spaced tees or in the secondary part of the piping. If before the secondary manifold the return tee will be installed the at the boiler return before the circulator for the primary loop.
Thank for the help.
Michael

Comments

  • Alan (California Radiant) Forbes
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    Before


    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Gordy
    Gordy Member Posts: 9,546
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    Since you will be adding radiant.
  • 347
    347 Member Posts: 143
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    I was thinking something like this, except I'll have the high temp zones after the mixing assembly along with the radiant

  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
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    You probably want high temp before mixing station, and a few well placed flow checks.

    There was an error rendering this rich post.

    Gordy
  • Gordy
    Gordy Member Posts: 9,546
    edited December 2018
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    Yes highest temp zone first.
  • 347
    347 Member Posts: 143
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    Yes, I was doing that. Just wanted to double check about keeping higher water Temps on the return.
  • Alan (California Radiant) Forbes
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    Does it matter if you have DHW priority?
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Gordy
    Gordy Member Posts: 9,546
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    No, just the radiant.