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  1. Replies
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    Local 30 Operating Engineers New York, NY

    Local 30 Operating Engineers New York, NY
  2. Take a look at some control sequences in this...

    Take a look at some control sequences in this link, lets see what you have. I think the DD403R or perhaps the DD407R works for you.


    http://www.enviro-tec.com/eCatalog/ms-pneu-dd.asp
  3. Is this a duplicate post?? The answer lies in...

    Is this a duplicate post?? The answer lies in ohms laws of electricity.
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    Looks kinda like cell#2 on your tower WATCH

    Looks kinda like cell#2 on your tower WATCH
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    Try this ...

    Try this



    https://estore.industrialcontrolsonline.com/products/MANUFACTURER/KMC%20KREUTER/KMC%20PNEUMATIC%20CONTROLS.aspx
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    Dave, This should be what your lookimg for....

    Dave,

    This should be what your lookimg for. The boiler enable goes in series terminal 6 operating limits.




    http://customer.honeywell.com/techlit/pdf/66-0000s/66-1085.pdf
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    Dave, Does this management relay look similar...

    Dave,

    Does this management relay look similar to yours?


    http://www.turboflame.se/Sidor/63-8387.pdf
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    The control circuit is specific to the burner on...

    The control circuit is specific to the burner on this boiler. Could you include the burner model number and the boiler serial number? Also what burner management system do you have?
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    ddalberto, Glad to hear you solved the...

    ddalberto,

    Glad to hear you solved the condition. Good call Roof Monkey. Backward bladed fans can be tricky when in reverse rotation, the standard fan laws will not apply. In this case a speed...
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    Reverse rotation with radial and forward curved...

    Reverse rotation with radial and forward curved bladed impellers will give reduced performance and power consumption but can cause severe overloading of the motor in the case of backward bladed...
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    Roof Monkey, Thatís a bold statement regarding...

    Roof Monkey,

    Thatís a bold statement regarding motor current and rotation. Could you elaborate a little more on your conclusions?
  12. Replies
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    The actual current draw on this motor is 33% over...

    The actual current draw on this motor is 33% over the motor full load rating. Reducing the fan speed by 10 % would be a solution; however the new current draw would still exceed the rating on your...
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    Take a look at this ...

    Take a look at this



    http://www.tcsbasys.com/docs/SZ1017a_sub.pdf
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    Hvac, There is a load calc on this site. Going...

    Hvac,

    There is a load calc on this site. Going with your numbers your in trobule
  15. Thread: out of ideas

    by kdocsr05
    Replies
    374
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    22,560

    Something of interest ...

    Something of interest

    http://www.youtube.com/watch?v=cIf9iPskgJs
  16. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    22,560

    Attached is a spreadsheet to calculate amps vs...

    Attached is a spreadsheet to calculate amps vs load. You input the power factor at full load and the amps at full load. It has some assumptions listed (neglect leakage reactance and losses). Under...
  17. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    22,560

    what I said and still say as backed up by the...

    what I said and still say as backed up by the various manufactures links and others, is that a motor dependent upon its construction can overheat while unloaded and once it is overheated, it can over...
  18. Replies
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    Mongo, Take a look at this ...

    Mongo,

    Take a look at this

    [http://www.titus-hvac.com/ecatalog/model.aspx?prodid=463&catid=186
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    Osyio, The key to this control sequence relies...

    Osyio,

    The key to this control sequence relies on proper selection of the valves.

    A typical good design for parallel transfer has the 1/3 valve at 25% and the 2/3 valve at 75% total pressure...
  20. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    22,560

    3 phase!!! still may have some typing to do on...

    3 phase!!! still may have some typing to do on this one.

    Good to hear from you fruecrue, after all your are the father of this on going debate



    :argue:
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    Uh the last time I did that we used a themometer....

    Uh the last time I did that we used a themometer. You have to post more equipment information to get the help desired.
  22. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    22,560

    Well I wish you could have done that yesterday,...

    Well I wish you could have done that yesterday, would have saved me some typing.

    For the record this was a single phase squirrel cage motor correct?
  23. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    22,560

    No that is not correct. I expect the current to...

    No that is not correct. I expect the current to be lower than the loaded current.
  24. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    22,560

    Tips, Honestly, I am not certain of my...

    Tips,

    Honestly, I am not certain of my expected conclusions to this topic. I hope to find an answer that is something in-between the current debate, perhaps a comprise, that all I can expect. This...
  25. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    22,560

    Tipsrfine, The answer is in para four, I plan...

    Tipsrfine,

    The answer is in para four, I plan on doing a test myself this weekend and will add the results with data to the post.

    Regards
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