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  1. #1
    Join Date
    Jul 2018
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    Wisconsin
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    Work in Progress

    NTI VM110P combi. 2 zone in floor. DHW still needs to be piped. Thing has been running for a few months. Heats a 80x60 shop with offices. Just hums along mostly on low fire.

    Sent from my SM-G960U using Tapatalk

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  3. #2
    Join Date
    Oct 2011
    Location
    Gladstone, Oregon (Portland)
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    May want to check manufacturers instructions on the venting. Not sure a concentric is approved.

  4. #3
    Join Date
    Jul 2018
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    Wisconsin
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    Thread Starter
    Yes it is why wouldn't it be?

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  5. #4
    Join Date
    Oct 2014
    Location
    Saint Pail, Minnesota
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    Wiring could be neater. The regulator is not installed properly, maxitrol doesn’t allow any fittings between vent limited and regulator.

  6. #5
    Join Date
    Jan 2010
    Location
    Sea to Sky
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    Quote Originally Posted by Pnasty View Post
    Wiring could be neater. The regulator is not installed properly, maxitrol doesn’t allow any fittings between vent limited and regulator.
    Please explain. You know the vent limiter has to be installed upright to work? If installed without a fitting in that orientation, the vent limiter won't operate correctly.

    Sent from my SM-G965W using Tapatalk

  7. #6
    Join Date
    Jul 2018
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    Wisconsin
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    Thread Starter
    The are 2 1/8 inch street 90s then the vent limiter. It may not be by the book but it works and I don't see a problem with it. Other manufacturers do this so I thought I'd give it a try before venting it outside.

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  8. #7
    Join Date
    Mar 2007
    Location
    Madison, Wisconsin
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    Looks good, my only beef would be the placement of the switching relay panel where it could easily see water damage down the road, but it looks like they shoved you tight into a corner so I bet you didnt have much choice. How do you like that exp tank hanger? I haven't used that style, but I saw them in the book.
    I r the king of the world!...or at least I get to stand on the roof and look down on the rest of yall

  9. #8
    Join Date
    Oct 2011
    Location
    Gladstone, Oregon (Portland)
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    Just checking. Some manufacturers prohibit them.

  10. #9
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Thread Starter
    Quote Originally Posted by Wheelbaron View Post
    Looks good, my only beef would be the placement of the switching relay panel where it could easily see water damage down the road, but it looks like they shoved you tight into a corner so I bet you didnt have much choice. How do you like that exp tank hanger? I haven't used that style, but I saw them in the book.
    Tank hanger is a shelve bracket from Menards.

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  11. #10
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Thread Starter
    Still find it almost amazing that this heats the building. Engineer had speced a unit about twice the size. This is for our shop we made provisions for adding supplemental heat with a gas fired unit heater or some IR tube heaters. We don't have a OA temp sensor set up yet so no reset. Water temp is set at 90* and it held the building at 60* while the OA temp was -30f. Think the engineer needs to check his math.

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  12. #11
    Join Date
    Oct 2014
    Location
    Saint Pail, Minnesota
    Posts
    674
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    Quote Originally Posted by BALloyd View Post
    Please explain. You know the vent limiter has to be installed upright to work? If installed without a fitting in that orientation, the vent limiter won't operate correctly.

    Sent from my SM-G965W using Tapatalk
    Correct, the vent limiter has to be in the upright position. Maxitrol also does not want you adding fittings between the limiter and the regulator. Therefore you cannot install the 325 series with a vent limiter in any other orientation than horizontal with the limiter on top.

  13. #12
    Join Date
    Jun 2011
    Location
    NE Ohio
    Posts
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    that looks like a lot of work ..... nice job !

    holding the building at 60 when it is - 30 outside is good ....

  14. #13
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Thread Starter
    Is there a technical reason your not suppose put a elbow on a limiter? I know they say not to.

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