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1st night with 1150 gals. of heated storage

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by huffdawg, Mar 3, 2012.

  1. goosegunner

    goosegunner Minister of Fire

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    Sam as RobC I have a 26-99 with 1-1/2" pipe. I have a Danfoss but I have it barely open during normal operation. I usually don't go below 130 on bottom of storage.

    I would prefer the new Danfoss because it closes boiler bypass as return tems rise until completely closed.

    gg

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  2. woodsmaster

    woodsmaster Minister of Fire

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    I keep my tremovar around 1/2 closed. I use a 15-58 grundfos on high. I'm running a 60kw boiler with 1 1/2" pipe.
  3. taxidermist

    taxidermist Minister of Fire

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    I always close my bypass loop when I get my storage return water above 150* that way all my water is going to storage not circulating around the boiler making it idle. I can get my bottom temps up to 185*.


    Rob
  4. hobbyheater

    hobbyheater Minister of Fire

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    What is the temp of your buffer tank same as the storage or the boiler ?
  5. jebatty

    jebatty Minister of Fire

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    I have no difficulty raising entire 1000 gal pressurized storage to 190-193F. As mentioned above, the key is loading the wood so as storage begins to top off, the wood load is burning down, output is falling, and no idling. What makes this very easy is weighed wood burns, as that insures a no idle burn and storage end temp at whatever the desired target may be. My Termovar is about 1/3 open until return from storage rises to the 140's, and then mostly closed after that. I always leave it open just a little. My Tarm-storage circulator is a 15-58 on MED.
  6. woodsmaster

    woodsmaster Minister of Fire

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    I can also get to 185 - 190 without much idling. I can get pretty much all the storage to 195 If I do some idling. I never close
    the termover all the wat for fear I'll forget to open it.
  7. jebatty

    jebatty Minister of Fire

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    ... which I have done at least twice ... leave it open some, good practice.
  8. huffdawg

    huffdawg Minister of Fire

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    Seems I cant get my buffer over 180 °F.
  9. woodsmaster

    woodsmaster Minister of Fire

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    I think if you tinkered with your probe to get outlet temp to match It would probably gain you at least the 6 degres it's off. one
    place to start maybe. You would still have a large cushion before you reach boiling with all that storage.
  10. huffdawg

    huffdawg Minister of Fire

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    I tried to have a look a the probe. it doesnt seem like it is in a well , feels like it is strapped to the top of the waterjacket. anybody know how the probe is attached on an EKO 40? I was reaching in through the controller opening and could only feel it not see it.

    Huff
  11. jebatty

    jebatty Minister of Fire

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    Probe location is important. On my Tarm, the boiler thermometer reads lower than the hot water output temperature. All of the sensors I have added are surface mounted: fixed with aluminum HVAC tape, then cable tied, then wrapped with insulation -- and mounted close to and downstream of an L or other fitting to turbulate/mix the water and get a more accurate water temperature.
  12. huffdawg

    huffdawg Minister of Fire

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    You would think there would be a service manual or parts manual showing locations of parts and such
  13. taxidermist

    taxidermist Minister of Fire

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    Thats how mine is mounted. I know your 40 has different sheet metal than mine but cant you pop off the top tins to see the probe?


    Rob
  14. woodsmaster

    woodsmaster Minister of Fire

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    Different boiler but mine isn't in a well. It's just clamped on the top of the fire box on the left side and fastened with a wing nut.
    Should be able to take the sheat metal off the top I'd think.
  15. huffdawg

    huffdawg Minister of Fire

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    Ya I have to get a scew driver with a longer shank to reach the screws holding it on. What sort of adjustment can you do on it.

    Huff
  16. taxidermist

    taxidermist Minister of Fire

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    you can move it to find a cooler or hotter spot. depending on what you are looking for.


    Rob
  17. woodsmaster

    woodsmaster Minister of Fire

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    On mine i slid the probe so it was barely touching the clamp and tightened back down. that got me close. Then I took a small chip of the roxwool insulation from the cover and slide it over the probe and thay got me the rest of the way. It is a little less responsive
    but it's not an issue.
  18. huffdawg

    huffdawg Minister of Fire

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    Ok I have moved it around a bit so it matches the gauge on the boiler output , I am charging now we will see what happens .thanx guys.
  19. SmokeEater

    SmokeEater Feeling the Heat

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    Been away from the "desk" for a few days so a belated congrats to your new 1000 gal storage. Must be wicked nice to be able to cruise along with fewer stoking ups. I see your Smart's snap switch is not in use. Can you do anything with it? I have the 100 gallon Smart and use it for a small buffer tank and a potable hot water tank, but too had no use for the snap switch and then had a light bulb go off in my head! Now I use the snap switch to sense when the pellet boiler is out of service for any reason and is not keeping the buffer up to temp. I use the the switch to fire up my fossil boiler if the temp in the Smart drops to 150 and let the aquastat shut it at the high limit. Another question, you have the Smart IWH, and the high temp water enters on the lower tapping and the cooler exits on the upper tapping. How do you have your new storage connected? Hot on top or bottom? Would it make a difference? Anyway, accolades to you and you "modified and improved" system.
  20. huffdawg

    huffdawg Minister of Fire

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    Thanx SmokeEater I need a switching relay for the snap switch ,havent got around to it yet.. right now i'm operating it manually.

    link showing how storage is plumbed

    http://www.hearth.com/econtent/index.php?ACT=24&fid=21&aid=64528_wvl96EvliChVquNy0zoZ&board_id=1

    Huff
  21. ewdudley

    ewdudley Minister of Fire

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  22. bioman

    bioman Burning Hunk

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    the bigger the buffer, the longer your warm, sounds like your doing good .
  23. huffdawg

    huffdawg Minister of Fire

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    The 4 way directional valve always keeps hottest water flowing in and out of storage. I also couldnt fit the two storage tanks in the boiler room the buffer tank allowed me to run the shop heat when the house heat wasn't tied in. To me it was a little more flexible than having one primary loop.
    Also adds another 150 gals volume and uses one less pump.

    Huff
  24. woodsmaster

    woodsmaster Minister of Fire

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    Did you get your storage temp up any?
  25. huffdawg

    huffdawg Minister of Fire

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    No . still stuck at 176 °F I noticed this morning the eko controller reading 7 °F higher than the boiler out gauge.

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