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"No Zone Purge" Supply Service Piping

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Labenaqui
Labenaqui Member Posts: 72
in THE MAIN WALL
A while ago Dan Holohan alluded to piping hydronic near-boiler supplies to preclude post-service purging.

This feature has been built into our now-patented "Neo-Gravity Hydronic Heating Appliance(TM)" from the onset. Here is a photo of a recent install:

A graphic depiction is also available by opening the patent link on our www.BoilersOnDemand.com website.

A simple supply stacking of:
1. Riser
2. Isolator Flange Valve w/Drain
3. Delta-T Circulator (in our case) - No Flow Check!
4. Freedom Flange (recently substituted for upper Isolator Flange Valve)
5. Tee to IWH ZV (Option, where used)
6. Riser to Lateral
A lateral:
2. To Air Eliminator w/ Tee drop to Expansion Tank (w/no valve) and lateral to Water Service/Backflow
3. To Compacted ZV Header (patented) or field-built
4. Horizontal/Vertical mounted to Zone Valves

To service/recover supply, turn off:
1. Power (close ZV's)
2. Water service.
3. (Lower) Isolator Valve, attach hose & drain
4. Reverse to recover with no purge necessary

Swapping out an Expansion Tank you will get an ounce or so of water drain.

If ZV's are vertical, a bubble will pass through the zone and vent upon first heat call

Obviously it won't work using contemporary build practices. Think about it .....

Comments

  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    edited November 2021
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    Is that picture an oil boiler? If so, maybe you can fix the flue pipe so it's to code.
    Also Dan's method is pumping away from the expansion tank. You pump right into it.
    You post this on FB group pages, I still don't see what's patent-able about it.

    There was an error rendering this rich post.

    jpulls11
  • Labenaqui
    Labenaqui Member Posts: 72
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    The "No-Purge" architecture is inherent within our appliance design.
    Referring to the patent copy on our website you will note the 14 Claims allowed relate to the optimization of natural hydronic convection as a distribution energy reduction method. Thus by integrating with a system delta-t circulator we reduce circulation energy to 8-13 watts in operation. Additionally we provide continuing DHW supply with a close-coupled IWH along with reduced zone heating continuity upon a circulator failure.
    Problem is, it doesn't fail in practice. We have just passed 100,000 hours operation on our appliance "betas" without a single system-related failure ..... none!
    Compare this with contemporary hydronic systems .....

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