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Buderus install

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John F
John F Member Posts: 29
Yes, those are Grundfos 15-58 3-speed pumps. What is unique is that they use an end-suction flange. This redirects the outlet 90 degrees from the inlet and allows the pump outlet to be rotated. The outlet can be pointed up, down, front, or, in this case, back.

The interior of the unit (Allcan) has a hydraulic separator at the bottom and an air eliminator at the top. There is internal piping to separate the supply and returns. An internal pipe runs from the hydraulic separator up to the air eliminator. When a zone pump is on, water is drawn from the hydraulic separator, into the air eliminator, then down between the air eliminator and outer wall into the supply chamber and out to the zones. Return water comes back to an internal header that connects to the hydraulic separator. See the exploded view.

If you would like more information or a detailed on-line presentation about PHP products, please contact me at johnf@phpinc.us or call 503-209-7830.

Comments

  • Mike.C
    Mike.C Member Posts: 43
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    Was a fun install. Big house lot's of leaks due to lack of communication to subs that there was tubing under floor. After this pick I rotated the pump on the bottom left side of the header( brain fart on my part installing upside down like that) Also hooked up a 40 gallon indirect tank.


    Mike.C
  • Nice install Mike

    What are the 5 black thingies ( lack of a better term ) ? Are they zone valves ?
  • Dave_4
    Dave_4 Member Posts: 1,405
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    Wow

    Ron, those are Grunfoss pumps. Look like a variation of 15-58 3 speeds with side inlet union connections. Mike, that header is mind boggling. Did you build it? If not, who makes it? I'm having a little trouble visualizing the hydraulic separation in that puppy. Does the supply from the Buderus pipe into the bottom also? I'm picturing a supply pipe, open at the top yet isolated with tees to the pumped zones. If so, it's quite a unique piece of engineering.

    I'd rework the pressure relief valve discharges. Shouldn't be PVC and certainly shouldn't be bullheaded toward each other. Upsize if your gonna combine two into one.

    Nice installation. Keep those carpet and hardwood guys off your tubing.

    Tom G.
  • Mike.C
    Mike.C Member Posts: 43
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    The header was made by PHP. Precision Hydronic Products. They make numerous hydronic products,plumbing products....
    The system has been working great. The header was interesting to work with at first. Now on the next one I have a few better ideas. It was a very long week so that is one problem with the PVC and the vertical pump and there are a few other issues. We built up a false wall and stubbed out all the copper to connect the header to and make things cleaner.

    Mike.C
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