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greenwood 100 damper motor problem

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by enio, Dec 18, 2012.

  1. enio

    enio New Member

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    i have had a greenwood boile for 4years , it had some issues to work out ,but i had it running good . this season i fired it up and noticed i could hear the fliud running in the lines ,furthur more the damper motor wanted to open and close at will and below operating temp .I thought the pump was maybe cavitating and replaced the cartriage and it still makes water flowing noise also the damper motor is now closed and will not open . I could use some advice

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  2. Fred61

    Fred61 Minister of Fire

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    I know nothing about a Greenwood but hearing water moving usually is an indication of low water. Confirm that the system is full and the pressure is adequate for your system.
  3. enio

    enio New Member

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    it is full to the level and it is an open system so its not pressurized till after the heat exchanger ,
  4. maple1

    maple1 Minister of Fire

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    I also know nothing about Greenwoods, but there should be no 'sloshing' noise in your lines unless there is air in them. I'd say you need to do some bleeding especially if this is a start up after an off season shut down.

    So then also knowing nothing about your damper motor - if it is like my old one and powered by a zone valve motor, they do go bad on occasion. I did have to replace mine at least once. When it went bad, sometimes it wouldn't open, sometimes it would stick open. Check for power going to it for starters.
  5. 2.beans

    2.beans Minister of Fire

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    Check the aquastat that controls the draft motor.make sure there's power to it. If that failed it won't let the door open as well.
  6. enio

    enio New Member

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    i opened the flow meter last night and pushed on the spring mecanisim with a screwdriver , the damper motor started to work . iam wondering if thats the issue
  7. enio

    enio New Member

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    i meant the flow switch
  8. 2.beans

    2.beans Minister of Fire

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    Got any pictures?
  9. enio

    enio New Member

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    sorry i have no pics
  10. 2.beans

    2.beans Minister of Fire

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    I'd say if there's a flow switch in your system that its working as designed. Sounds like your air bound. Flow switch look something like this? ImageUploadedByTapatalk1355939186.443291.jpg
  11. enio

    enio New Member

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    yes it looks simular to that WE ANDERSON FS 2 FLOW SWITCH
  12. enio

    enio New Member

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    what does air bound mean ?
  13. enio

    enio New Member

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    ok i googled it , my system is an open system ,how would air gotten into the system ,could a bad flow switch cause this
  14. 2.beans

    2.beans Minister of Fire

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    I don't think a bad flow switch would cause the air. It's not uncommon to get an air pocket in the system after it sits for a long period of time. The flow thru the boiler showed be silent. Where is the boiler located?
  15. enio

    enio New Member

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    bolier is in the garage system has a reservor tank on the top of the boiler after the heat excanger it is a pressureized system
  16. 2.beans

    2.beans Minister of Fire

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    That's a closed system. If you have a pressure gauge on the boiler what's it at?
  17. 2.beans

    2.beans Minister of Fire

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    Does it have a auto fill valve on the boiler side?
  18. enio

    enio New Member

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    i have a temp guage on the boiler , pressure gauge after the exchanger , i have an auto fill on the other side of the heat exchanger, on the boiler side i have a tank on the boiler with a sight glass that i keep filled
  19. enio

    enio New Member

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    boiler isnt workimg right now . damper motor will not open . i tested it buy by passing it and the damper motor started to open
  20. 2.beans

    2.beans Minister of Fire

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    So is the boiler side open and the house side is closed system?
  21. enio

    enio New Member

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    yes it is
  22. 2.beans

    2.beans Minister of Fire

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    Flow switch on the boiler side of the exchanger as well?
  23. enio

    enio New Member

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    flow switch is on the boiler mounted on the top
  24. 2.beans

    2.beans Minister of Fire

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    Ok. The fill valve on the boiler must be a manual valve?
  25. enio

    enio New Member

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    yes i would be gravity feed

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