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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.
  4. Replies
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    Looks kinda like cell#2 on your tower WATCH

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

    Try this



    https://estore.industrialcontrolsonline.com/products/MANUFACTURER/KMC%20KREUTER/KMC%20PNEUMATIC%20CONTROLS.aspx
  6. Replies
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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
  8. Replies
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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?
  9. Replies
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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...
  11. Replies
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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...
  13. Replies
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    Take a look at this ...

    Take a look at this



    http://www.tcsbasys.com/docs/SZ1017a_sub.pdf
  14. Replies
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    1,150

    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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    26,909

    Something of interest ...

    Something of interest

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

    by kdocsr05
    Replies
    374
    Views
    26,909

    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
    26,909

    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
  19. Replies
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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
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    26,909

    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:
  21. Replies
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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
    26,909

    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
    26,909

    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
    26,909

    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
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    26,909

    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
  26. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    26,909

    Ohmís laws will not apply to induction motors....

    Ohmís laws will not apply to induction motors. Because of the inductive component associated with the design, it is the laws of Lenís and Faraday that become relevant in understanding the physical...
  27. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    26,909

    Delta T, Well said, your post puts the issue...

    Delta T,
    Well said, your post puts the issue back into perspective. Early on in the thread, we talked about the importance of design condition present during equipment analysis. Personally I do not...
  28. Thread: Computrols

    by kdocsr05
    Replies
    10
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    1,864

    It is the relay coil that requires the sunbber to...

    It is the relay coil that requires the sunbber to protect the triac
  29. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    26,909

    Hang in there fruecrue. No insults from this end....

    Hang in there fruecrue. No insults from this end. I found your post to be of interest, and hope you come to a solution soon.
  30. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    26,909

    I'm with Chris also. I said in my first post...

    I'm with Chris also. I said in my first post design parameters, that is the key. What is your motor RPM, I would like to run the hp calculation with a more accurate equation.
  31. The drawing presents fundamental solid design...

    The drawing presents fundamental solid design concepts. I would however look into surface mounting the temperature sensors for the new zones.

    I worked as a consultant last year at a mansion,...
  32. Replies
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    CMA, My next question would be, low fire/high...

    CMA,

    My next question would be, low fire/high fire do we modulate between a range, or two stage firing low fire and high fire?

    We should have a common pressure control which puts the call on...
  33. Thread: out of ideas

    by kdocsr05
    Replies
    374
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    26,909

    I have been tracking this post all weekend, holy...

    I have been tracking this post all weekend, holy s- - t. we still haven’t solved the condition!
    I put my two cents in from the beginning and now offer a third cent.

    The motor manufacture’s...
  34. Thread: Computrols

    by kdocsr05
    Replies
    10
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    1,864

    Burnt boards? Check your wiring detail; I think...

    Burnt boards? Check your wiring detail; I think you will find a snubber is required on the output point when using the triac point configuration. HOA switches are no longer used on the hardware...
  35. Thread: Computrols

    by kdocsr05
    Replies
    10
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    1,864

    VSD, I presently work for a company that...

    VSD,

    I presently work for a company that represents Computrols in the New York area.

    I am not a controls technician; however, I commission the projects upon completion.

    Do to site rules and...
  36. Replies
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    Sorry for the delay in response, the holiday had...

    Sorry for the delay in response, the holiday had me occupied the past two days.

    I agree with the post regarding performance issues with the heat exchanger affected by reduction in steam flow. The...
  37. Thread: Computrols

    by kdocsr05
    Replies
    10
    Views
    1,864

    VSD, Put something in your profile about your...

    VSD,

    Put something in your profile about your experience, location etc. I have information to offer, but would like to know more about you.
  38. Replies
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    I like to jump in here, but have some questions....

    I like to jump in here, but have some questions.

    Are we talking about a steam to hot water HX?

    What is the design steam pressure?

    Assuming steam to hot water HX, what is the design hot water...
  39. Thread: out of ideas

    by kdocsr05
    Replies
    374
    Views
    26,909

    3200 cfm on a two hp motor is extremely high. Is...

    3200 cfm on a two hp motor is extremely high. Is it 1600 cfm on two separate fans, or parallel fans on a common discharge duct?

    The current on initial start up seems high; typically, manufactures...
  40. Replies
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    Try this, i think the AVB-25 will work for you. ...

    Try this, i think the AVB-25 will work for you.



    https://www.belimo.us/bellib/Accessories/Mechanical_Accessories.pdf
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    Try (800) RTU-DATA, just kidding. Could you be...

    Try (800) RTU-DATA, just kidding. Could you be more specific please?
  42. I agree with all the post regarding pool water...

    I agree with all the post regarding pool water capacity, just not there.

    How about the chemical treatments used in a swimming pool? Standard heat pump equipment would not tolerate the chemicals in...
  43. Replies
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    Can you post more info. The system application,...

    Can you post more info. The system application, cut in cut out pressure, and the load on your boiler please.
  44. Replies
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    1,604

    Heating a pipe that is embedded in the fondation,...

    Heating a pipe that is embedded in the fondation, this is dangerous, had a partner lose an eye when the slab exploded on him while heating a fitting.
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    Tator, I think you are simplifying the issues...

    Tator,

    I think you are simplifying the issues here. The last glow plug I changed was on a old generator.

    A good technician uses logic, scientific knowledge, application sequences and...
  46. Replies
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    Cut the pipe about 1" from the tee, then cut the...

    Cut the pipe about 1" from the tee, then cut the inside of the 1 1/2" about 3/4" through the sidewall. You can now using a small chisle tap the pipe inward releasing it from the joint. Works all the...
  47. Replies
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    Assuming the pump motor controller includes an...

    Assuming the pump motor controller includes an auto run circuit, why not run in auto?

    A typical sand filter would run when condenser water flow is established. Back flush is a function of the...
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    This is a simple system I've used in the past....

    This is a simple system I've used in the past. Material is stocked at your local Grainger.
  49. A central hot water heating system will form...

    A central hot water heating system will form sludge over time. Black / brown sludge is the product of de-oxygenated water but this can take years to form. Flushing and adding a good inhibitor will...
  50. Replies
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    Flue gas readings would be helpful here, also the...

    Flue gas readings would be helpful here, also the stack temperature and the breech draft.
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