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Problem, bb zones heating when radiant calls? please help!

trl14
trl14 Member Posts: 5
in THE MAIN WALL
Just swapped out an old boiler with a Triangle tube modcon. We also added a radiant zone to a new addition of this house. The problem is this, When the radiant zone calls all 3 of the baseboard zones get residule heat? all the rooms reach temps of 80 degrees or so until the Radiant zone finally satisfiys.
I have 3 007ifc on the supply side and then the radiant zone goes thru a mixing valve and then pulled by a 007ifc out to the system. I'm pretty sure replacing the 3 circs for the baseboard zones with zone valves would cure the problem because it would give me possitive shut off when the radiant zone only is calling. But I have to think there is a correct way to fix this still using pumps. I think primary secondary should have been used after reveiwing the install guide but there is no room to do that now and since this will be out of pocket I was hoping to save money and labor by doing something simple. Please help with any ideas!

Comments

  • kpc_40
    kpc_40 Member Posts: 62
    pictures?

    something sound strange...either wired wrong or you are not piped up best.
  • steveex
    steveex Member Posts: 95


    Your tees maybe spaced to wide on rad zones, if you checked every thing else, ifcs and they are fine you can install honeywell zone valves right after the circs and use 110 motor in the zone valve and wire it right to the pump. This saves you some wiring no end switch needed.
  • tim smith
    tim smith Member Posts: 2,807
    Need pictures of pipe up. Suspect you are getting flow from

    the main pump up through bb zones when mix valve is throttling. Also sounds like you would probably be starving flow to boiler at same condition due to not being piped pri/sec. Sounds like some pipe changes are in order... Tim
  • trl14
    trl14 Member Posts: 5


    I dont have pics yet. I will get some. in the mean time I will try to be as visual as possible. I have 1" copper coming out of supply. 1st circ is 18" from boiler. then the remaining two circs are spaced 8" apart from each other using 1x 3/4 tee's then at the end of the manifold another 8: away is a mixing valve with a circ pulling through the mixing valve. I dont know if that helped anybody? I hope so so that I have an answer before I go back to the H.O!
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