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New boiler, Insufficent heat



  • Gordy
    Gordy Member Posts: 9,546

    Your like a Doctor, and sometimes your like a Veterinarian Rich.
  • Melhe
    Melhe Member Posts: 40
    Temp setting

    Thanks, Rich.

     I have a question.  The temp over night still dropped to 68. ( of course much better than before). The contractor told us the old tubing we have under the floor can't hundle water temp over 140 because the painting around the tubing could chip off and damage the tubing if temp over 140. Currently we set boiler temp to 150 so that output temp in the tubing bw 120 to 130. But if we raised boiler temp to 160. occationally tubing temp will raise about 140. Do you any suggestions?  68 room temp is when boiler setting 150. I still have trouble to get temp raise to settings when outside temp drop to 20s or 10s. Please let me know if more recommendations. .Thanks
  • Rich_49
    Rich_49 Member Posts: 2,766
    Old Tubing ?

    Where is this old tubing that your installer refers to ? This tubing all appears to me to be Uponor HePex.  There is no paint on HePex now nor has there ever been to my knowledge . That barrier is applied inside and out by pulling the tubing through a bath of the barrier material the minute it comes out of the extruder .  This barrier can reach at least extrusion temp (256*) without suffering any compromise of the applied barrier .  Earlier in the discussion you mentioned mixing devices , could you show us a picture of those and where they are in the system ?  My memory is not what it used to be , could you say again what type of floor you have there , is there overpour or concrete below your finish floor ?

    There is still the issue of head pressure du to the length of the installed loops and the Delta T ( shows this ) .  Could you tell us what numbers are on the pump for that manifold which has the 4 on it . It sounds as if the master bedroom is the area with the largest head loss and the circulator just struggles to heat that room . I am guessing that you have a 008 VDT , this because self proclaimed heating guys who do not actually know about heat have difficulty justifying the price of the correct pump in their mind when thy already invested 100.00 more than the typically used pump ,

    I would really like to see this system in person just out of curiosity . If possible and within a reasonable distance  I would volunteer my time to assist you . Where are you located , Monmouth or Ocean  Counties are within what I would consider close enough , even into Middlesex , Burlington .   
    You didn't get what you didn't pay for and it will never be what you thought it would .
    Langans Plumbing & Heating LLC
    Serving most of New Jersey, Eastern Pa .
    Consultation, Design & Installation anywhere
    Rich McGrath 732-581-3833
  • Gordy
    Gordy Member Posts: 9,546
    Take Rich up on this.

    Never heard of coating peeling off pex.
  • SWEI
    SWEI Member Posts: 7,356
    Newer hePEX

    Manufactured after 03/10 also has a non-slip layer on top of the EVOH.  You can tell by the duller, slightly rubbery finish.