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  1. #1
    Join Date
    Feb 2006
    Posts
    522

    Buderus GB142 Multi Family / Retail

    I can't take credit for any of the piping or much else....

    I'm just the wiring and start up monkey!

    GB142-60
    7- Callefi "pop top" zone valves
    2- Honeywell Wireless Pro6000 tstats
    5- Honeywell Pro5000 tstats
    Boiler Buddy
    Grundfos Magna System Pump
    Spirovent
    100+ gallon indirect tank

    Don't have any before pics, sorry. It was originally a cast iron boiler (constant temp) with 4 zones (pumps). We re-piped the entire boiler room and split up the system to make 7 zones as the four apartments upstairs were originally controlled by only 2 thermostats and two of the retail shops downstairs were controlled by 1 stat.

    I thought this job turned out pretty well considering it was a bit of a rush.

    Any critique?

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  2. #2
    Join Date
    Mar 2007
    Location
    Madison, Wisconsin
    Posts
    2,263
    looks nice
    clean
    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

  3. #3
    Join Date
    Sep 2012
    Location
    thomaston, ct
    Posts
    322
    That's a lot of gas man! How do they split up the gas bill?

    Install looks nice and clean though.

    Would have taken the five minutes to paint the board though.

  4. #4
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,223
    Nice clean boiler work!

    Could have saved a pump by just using the buffer tank as your hydraulic seperation. I know, the low loss header comes with the boiler, which is why it always gets used.

  5. #5
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    They want check valve right at tank, all four ports so no gravity flow.

  6. #6
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,223
    Quote Originally Posted by Joehvac25 View Post
    They want check valve right at tank, all four ports so no gravity flow.
    No need for check valves. Gravity flow won't happen with zone valves on the supplies. Or did you mean something else?

  7. #7
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Quote Originally Posted by chuckcrj View Post
    No need for check valves. Gravity flow won't happen with zone valves on the supplies. Or did you mean something else?
    I have seen it go up the returns even. All the buffer tanks I've installed have 4 check valves right in the manual. I agree that with zone valves you won't get any after them. Not sure but maybe even the boiler side could a little also. If I'm wrong it won't offend me to school me chuck, I know you know your beans.

  8. #8
    Join Date
    Nov 2001
    Location
    Moose Jaw, Saskatchewan, Canada Occupation:Interprovincial Plumber, Commercial Gasfitter Interests:
    Posts
    2,414
    Couldn't afford a coat of paint on the plywood?

    A boiler drain between the ball valve and the x-tank would be nice for service.
    I love my job, but paydays Thursday

  9. #9
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,223
    Quote Originally Posted by Joehvac25 View Post
    I have seen it go up the returns even. All the buffer tanks I've installed have 4 check valves right in the manual. I agree that with zone valves you won't get any after them. Not sure but maybe even the boiler side could a little also. If I'm wrong it won't offend me to school me chuck, I know you know your beans.
    I guess I don't understand why they would need any check valves in this application (other than the primary loop and the DHW loop of course). Gravity flow, if even possible on the boiler side, would not have any negative effect that I can think of.

    But I've been wrong before!

  10. #10
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Quote Originally Posted by chuckcrj View Post
    I guess I don't understand why they would need any check valves in this application (other than the primary loop and the DHW loop of course). Gravity flow, if even possible on the boiler side, would not have any negative effect that I can think of.

    But I've been wrong before!
    I guess at long off periods the highly insulated tank could lose heat and fire the boiler, but after a closer look there is no aquastat on the buffer tank so I guess that wouldn't be an issue. We set them up with outdoor reset and Teckmar control so the boiler maintains tank temperature. Not to hijack but here's one I did.Name:  ImageUploadedByTapatalk1356666401.236996.jpg
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  11. #11
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,223
    Quote Originally Posted by Joehvac25 View Post
    I guess at long off periods the highly insulated tank could lose heat and fire the boiler, but after a closer look there is no aquastat on the buffer tank so I guess that wouldn't be an issue. We set them up with outdoor reset and Teckmar control so the boiler maintains tank temperature. Not to hijack but here's one I did.Name:  ImageUploadedByTapatalk1356666401.236996.jpg
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    Nice work!

  12. #12
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Quote Originally Posted by chuckcrj View Post
    Nice work!
    Thanks, I enjoy this stuff!

  13. #13
    Join Date
    Jun 2002
    Location
    south jersey
    Posts
    1,131
    Do the install guys know you are putting up pictures of there work?
    You need to put the phone down and get back to work!

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