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Radiant controlling Triangle Tube Solo boiler output temp

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Eja55
Eja55 Member Posts: 2
Have a Triangle Tube Prestige Solo 110 piped p/s. Two circuits on panel radiators, one on radiant floor, one DHW. Install 12 years ago with no issues on operations. ODR installed. Recently a problem has developed concerning the supply water temp. When the floor is operating the water temp is around 100-110, when the panels are operating at the same time the temp stays at low temp. Shut off the radiant floor, temp goes up to 160 as required. Have a Apollo 34A mixing valve for the radiant floor circuit. All pumps seem to be working. This issue just started this year. Thinking possible failed mixing valve. Looking for some direction..

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  • psb75
    psb75 Member Posts: 852
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    With the floor only calling for heat and then watching as a call for heat is made for panel rad zone, if the boiler temp doesn't increase appropriately, I would think something is wrong with the boiler. I wouldn't suspect the mixing valve if the floor is heating as desired. Call to Triangle Tube tech support?
  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,646
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    Where are the thermostats landed? What is controlling the circulators? Are the circs coming from the boiler? And all 3 zones TT going to the boiler?

    If so, then there is most deinatly a glitch in the boiler logic. 
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
  • Eja55
    Eja55 Member Posts: 2
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    The heating stats are all connected to a Taco switch relay,. DHW stat is on the indirect Smart connected directly to boiler control. The more I watch the boiler operation, I noticed when call for DHW, supply only goes to about 140-150, when it should be 180+. Have another control module, will change it.
    This boiler has been flawless in operation for 12 years, so I should expect some issues to start showing up.