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  1. #14
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
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    Thread Starter
    Sterling 95/5

    Nokorode paste flux

    I was given specs of the coil. Freeze pump i was told to design at 1/3 of gpm of coil

    51gpm coil

    17gpm at 15ft/hd

    Went on wilo website, plugged in numbers and found the smallest pump i could use.


    Sent from my iPhone using Tapatalk

  2. #15
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    24,397
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    A job the fitters are doing for us.
    The labor savings more then make up for the cost of the fittings!
    Attached Images Attached Images  

  3. #16
    Join Date
    Apr 2003
    Location
    St. Louis
    Posts
    1,251
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    Installation looks good but a power failure coils done. Plate hx pump and expansion tank and glycol the only 100% way for protection.

  4. #17
    Join Date
    Jul 2009
    Location
    Columbia, MD
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    5,798
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    Thread Starter
    Quote Originally Posted by servicefitter View Post
    Installation looks good but a power failure coils done. Plate hx pump and expansion tank and glycol the only 100% way for protection.
    Thats a pretty good idea.

    If they just switched to glycol. Everything would be good


    Sent from my iPhone using Tapatalk

  5. #18
    Join Date
    Oct 2016
    Posts
    1,250
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    Quote Originally Posted by servicefitter View Post
    Installation looks good but a power failure coils done. Plate hx pump and expansion tank and glycol the only 100% way for protection.
    What protects the waterside of your system when the power failure occurs? Our coil is good, but the boiler and our new hxger are leaking water....

  6. #19
    Join Date
    Apr 2003
    Location
    St. Louis
    Posts
    1,251
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    Quote Originally Posted by gravity View Post
    Thats a pretty good idea.

    If they just switched to glycol. Everything would be good


    Sent from my iPhone using Tapatalk
    Problem with whole system treated with glycol is more pump is needed, less heat transfer ,cost of glycol and the maintaince.

  7. #20
    Join Date
    May 2009
    Location
    SC
    Posts
    1,916
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    Quote Originally Posted by gravity View Post
    The unit has a freeze stat that;

    Closes o/a damper. Opens control valve 100%. Shuts the fan off.

    I tested operation and verified it worked. First time seeing the unit, the county takes care of it.

    I installed new coil and a freeze pump per their request.
    And it still froze? This is the cooling coil right? Do they not bring on the CHW pumps in freezing conditions?

    One theory; if the damper isn't darn near perfect the other units running in the building may still pull OA through the unit causing things to freeze.
    Scott Jalbert, WebCTRL ninja, Naiagara AX and EcoStruxure Building Expert newb, SiteScan Retired

    The master has failed more times than the beginner has even tried

  8. #21
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    5,798
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    Thread Starter
    After pictures if insulation






    Sent from my iPhone using Tapatalk

  9. Likes chander liked this post
  10. #22
    Join Date
    Oct 2014
    Location
    Columbus, Ohio
    Posts
    1,483
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    Fantastic job. Did you do that or did you call in an insulator?

  11. #23
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    5,798
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    Thread Starter
    Quote Originally Posted by rjk_cmh View Post
    Fantastic job. Did you do that or did you call in an insulator?
    Had the pros do it

    Union insulators


    Sent from my iPhone using Tapatalk

  12. #24
    Join Date
    May 2006
    Posts
    3,608
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    to bad all those thin purple wires could not be put in conduit would really make this thing look grate

  13. #25
    Join Date
    Jul 2009
    Location
    Columbia, MD
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    Thread Starter
    Quote Originally Posted by pctech View Post
    to bad all those thin purple wires could not be put in conduit would really make this thing look grate
    They could have came thru the floor and kept them low, go around the unit to the right and behind and back up.

    I agree, it does look like crap. Lazy IT guys


    Sent from my iPhone using Tapatalk

  14. #26
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    24,397
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    Quote Originally Posted by gravity View Post
    After pictures if insulation






    Sent from my iPhone using Tapatalk
    Damn Nice Work.

    Makes you appreciate other people’s trade skills!

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