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Question about New Indirect Hot Water heater setup...

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yekasi
yekasi Member Posts: 33
in Domestic Hot Water

hello,

Q1) My indirect hot water heater is getting replaced, and i would like to get some advice if there are any issues with the new proposed setup.

Q2) I also have a question where can i add a cold water valve into the Indirect Water heater — from what i googled, you have to put it BEFORE the mixing valve (I dont understand why) and so i want to know, does it make ANY difference if i put a ball valve at the ORANGE or GREEN questionmark? I Just dont see any difference to it.

Incase you wonder, i dont have enough space to have the XTank on the right side of the COLD water pipe.. as there are alot of pipes behind it. Thats why i am proposing on the left side.

Thank you!!

image.png

Comments

  • ethicalpaul
    ethicalpaul Member Posts: 8,513

    try this diagram instead. Compare prices, and go on a vacation with the difference

    image.png

    NJ Steam Homeowner.
    Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
    See my sight glass boiler videos: https://bit.ly/3sZW1el

    HVACNUT
  • HVACNUT
    HVACNUT Member Posts: 7,344

    If the valve is at the green arrow, you can't service the mixing valve without shutting off the main.

    I know the drawing isn't to scale, but the extrol will be supported, right?

    mattmia2
  • psb75
    psb75 Member Posts: 1,111

    Orange location is best. Shuts off water to BOTH the mix valve and the DHW tank.

  • yekasi
    yekasi Member Posts: 33
    https://forum.heatinghelp.com/discussion/comment/1886138#Comment_1886138

    yes. There will be wire cable to hook onto the beam above to support that weight.

  • hot_rod
    hot_rod Member Posts: 27,136

    If you have hard water, the mix valve will require deliming occasionally, maybe yearly. So a valve on all 3 sides is helplful for removing and soaking the valve.

    So on the orange and on the red outlet line would be ideal.

    The boiler cold fill has a pressure reducing valve and backflow I assume?

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • bjohnhy
    bjohnhy Member Posts: 190
    edited February 6

    There is not supposed to be a shutoff valve between the hot water tank and the expansion tank. The valve should go before the Expansion tank Is Teed off (towards city supply of that Tee). Neither organge nor green location are up to code. And the ball valve at the expansion tank, that's not supposed to be there either on DHW systems.

    I agree with shutoff valves around the mixValve to facilitate servicing.

    mattmia2
  • hot_rod
    hot_rod Member Posts: 27,136

    here is an option with few valves to isolate the dhw tank and mix valve, leaving expansion tanks below main shutoffs

    Expansion tank service valves are becoming common. Remove handle if that helps

    IMG_1947.jpeg

    eliminate I unintentional shutoff

    IMG_1949.jpeg
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    mattmia2bjohnhy
  • mattmia2
    mattmia2 Member Posts: 16,164

    where are you putting the relief valve in this setup? that is the valve that can't have a valve between it and the vessel being heated.

  • hot_rod
    hot_rod Member Posts: 27,136

    the 30 psi relief for the boiler is typically a 3/4 connection into the boiler block. Some expansion tank mounting arms have a tap for the relief valve

    The side port on that Webstone is often where a relief valve installs, on tankless water heater valves for example

    IMG_1441.jpeg
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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