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Type: Posts; User: koolaid747

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  1. John... Just wondering if you put the unit back...

    John... Just wondering if you put the unit back into operation and if you found it needs replacement? I worked for a company for about a week that sent me out with their number one maintenance tech....
  2. Thread: Got shocked

    by koolaid747
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    3,049

    I am glad you are here to share this with us and...

    I am glad you are here to share this with us and thank you for doing so. I will incorporate this into my safety awareness regime.
  3. Glennac... Thank goodness you are OK. I just...

    Glennac... Thank goodness you are OK. I just watched the video that Smeg mentioned and it is absolutely scary what some of these people are doing to insult all of us that have studied and worked very...
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    Don't forget to replace the stuck relay that...

    Don't forget to replace the stuck relay that single phased it!
  5. Replies
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    2,965

    That was the best unit/compressor that has ever...

    That was the best unit/compressor that has ever been made. If they make that compressor anymore I would replace it. Don't forget to get new rotolocks.
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    790

    As to the resistors installed... I have only seen...

    As to the resistors installed... I have only seen diodes or capacitors placed across contactor coils to stop the voltage spikes that lead to problems in an energy management system. As for the...
  7. Replies
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    6,785

    Must be warming up... Compressor change approved!...

    Must be warming up... Compressor change approved! Finding the compressor out of oil does indicate a reason for the burnout. It is still difficult at this point to determine why the compressor lost...
  8. Replies
    4
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    157

    Many more bits of info are needed to get close to...

    Many more bits of info are needed to get close to a guess. Pressures, temperatures. oil level. been operating awhile or new...
  9. Replies
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    1,999

    It is normal for an overload or problem on the...

    It is normal for an overload or problem on the low voltage side to open the smaller windings on the primary side. A correctly sized fuse on the secondary should stop the primary from opening... IMHO.
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    Could you obtain the hot and cold deck set points...

    Could you obtain the hot and cold deck set points and actual temperatures being sent to the OR's too?

    "... but need to maintain exhaust standards for the OR’s of 350 cfm minimum. Right now they...
  11. Replies
    12
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    369

    Rich, Would you happen to have static pressure...

    Rich, Would you happen to have static pressure readings on the hot and cold ducts entering the constant volume boxes that supply each operating room? Also, a SP reading after each constant volume...
  12. Replies
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    416

    Sorry Timjimbob... I could not find anything on...

    Sorry Timjimbob... I could not find anything on search engine to remind me of what your working on. I can only remember working on one unit that was built to NOT let the motor come out without a...
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    416

    Can you snap a picture of the unit? I may be able...

    Can you snap a picture of the unit? I may be able to remember. A model number may help me as well.
  14. Replies
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    Good call timjimbob! This would explain why the...

    Good call timjimbob! This would explain why the safety switch didn't work either.
  15. Replies
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    1,275

    dlove... I found a good article for you to take a...

    dlove... I found a good article for you to take a look at. http://www.achrnews.com/articles/variable-air-volume-systems
  16. Replies
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    1,275

    If it is a typical double duct system the hot and...

    If it is a typical double duct system the hot and cold deck static dampers are located after the hot and cold coils somewhere near the air handler. Each floor has several 'double duct boxes' which...
  17. Replies
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    1,275

    Dlove, He does have a constant volume system but...

    Dlove, He does have a constant volume system but with it being double duct it has different air volumes going through the cold duct and hot duct controlled by static dampers at the air handler. His...
  18. Replies
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    1,275

    Air balance is not the issue at this point. Yes,...

    Air balance is not the issue at this point. Yes, you will need a vfd on the return fan. You don't want to blow or suck windows out. You will need to modify your controls so that the vfds track your...
  19. Replies
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    1,275

    By adding floor dampers you are in effect...

    By adding floor dampers you are in effect changing the constant volume double duct system to a variable air volume system. Anytime you take an engineered system and change any one of the variables it...
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    2,872

    Yep, it's an old York. Had a key lock on the...

    Yep, it's an old York. Had a key lock on the control panel down at the bottom. Wonder what some engineers have on their mind when they come up with stuff like this?
  21. Replies
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    IMHO... The theory is great and your drawing is...

    IMHO... The theory is great and your drawing is very simple but. Changing the double duct system to VAV is not simple. You will need to add a vfd on the return fan, redo the controls, maybe need to...
  22. John, good points... my brain read fan coil and...

    John, good points... my brain read fan coil and not furnace!
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    884

    dandyme... I like your signature tag line! "It`s...

    dandyme... I like your signature tag line! "It`s better to be silent and thought the fool; than speak and remove all doubt."

    ljanosky... I found that filling out a little bit of information in...
  24. Make sure that your refrigerant charge is good...

    Make sure that your refrigerant charge is good (superheat and subcooling, etc.). If there is a warm spot in the coil the water will not trickle down the fins, it will fall off.
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    It has been my experience that the VA rating of...

    It has been my experience that the VA rating of the transformer doesn't change, it is some other component or factor that changes. Things to consider: Make sure the high voltage tap is correct, IE...
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