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Design Condition (ME)

Baby, it's COLD outside. Here's a snap shot of whats going on in the boiler room of my house. How about yours:-)

Nice mug of 11 degree Delta Tea, shot of Dr McGillicudys mixed in, and we're snug as bugs in a rug! Hope you're doing the same.

Happy Holidays to all my Wallster Friends, an dmay your New Year be better than your old:-)



  • Floyd_7
    Floyd_7 Member Posts: 136
    I'll try one from my Ultra...

    from a few weeks ago....

    Nope don't work. I'll keep trying.

    Can't get the monitor screen to transfer to different programs.

  • Dave Stroman
    Dave Stroman Member Posts: 763

    You are right Mark, design conditions tonight. The only complaint I have had so far is a house with staple up Entran with no plates and poor insulation. Runing the water at 180 but the house is loosing ground. Down to about 64 inside. Looking forward to the chinook tomorrow to warm things up.

    Dave in Denver
    Dave Stroman
  • Weezbo
    Weezbo Member Posts: 6,232
    is going back down to 30 below tonight,I know just how you

    Feel. i need to apologize to a guy i think i was being mean to him earlier....You guys are indeed fortunate to have everything within the goal posts this evening as the boilers prove themselves ....
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928

    Touch below design this morning. Boiler consuming 72 mbh. REMEMBER: Outside temp is solar influenced and the darned thing still goes through fits of failed transmission. Replacement on the way, but new sensor to use on the North side still on back order.

    Only problem I'm having is with radiant floors. They're running a touch cooler than with the old boiler. Instead of 5° above average surroundings I'm getting a variance from about 4° - 6°. Also have to use a slightly higher TRV setting to achieve the same space temp as before. Big family room has twin "window rads" under a big bank of North facing casements. Previously one would ONLY heat if I turned up its TRV. When maintaining temp at same setting as the other rad, it's supply line would be stone cold--even with outside temp well below design. Now, once temp drops into the 20s, it's heating but not quite as warm as the other.

    Tried a few things yesterday to change things.

    First dip (return & supply) is when I raised two TRVs. Rads heated rapidly. Very shortly after I raised the maximum circulator speed from factory default value of 65 (1750 rpm) to 80 (2350 rpm). Only real effect was a slight reduction in delta-t and flue temp became and stayed relatively higher than supply temp.

    Second dip (in supply only) is when I returned the circulator to the factory setting.

    Look at supply temp around 3:30 p.m. Raised shift in reset curve by one degree Celcius at that time. Notice little rise, followed by a resumption of the original curve! Listened to the burner ramp up for a minute or so, then it just ramped back down to original level but at a 2° higher reported "boiler temperature".

    Boiler seems utterly determined to produce a supply temp I can measure at a nearly perfect constant. Hmmmm....

    Will make some adjustment in the room temperature setting today.
  • Mark Eatherton1
    Mark Eatherton1 Member Posts: 2,542

    I knew you'd be one of the people to respond with a graphic:-)

    Great job Mike. Happy Hollandiase sauce to you and yourn.

  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928

    Well shucks! That equipment isn't just for me to say it's there... Merry Christmas Mark (and all). Have been limiting my trips in all this snow, so your limestone is still in the basement. Will mail next week when I have a bunch of other UPS stuff heading out.
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928

    YIKES! I actually enjoy the cold, but have never experienced anything near -30! They shrink up into my body just thinging about it...
  • Paul Rohrs
    Paul Rohrs Member Posts: 357
    Dr.Eatherton...Dr.Eatherton to ER Stat!

    We have got a boiler on a FLAT LINE.

    Talk about steady state efficiency, that is a text-book flat line.

    Regards from Balmy Nebraska,

This discussion has been closed.