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Type: Posts; User: drjfjr

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  1. Replies
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    any company do a manual j calc? can not...

    any company do a manual j calc? can not accurately size with out one.
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    484

    The unit may have low air flow across the...

    The unit may have low air flow across the evaporator or leaks some where. I hope tech did not state that he "did not find much leakage" as you posted earlier. Any leak is too much and would cause...
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    772

    I believe he would need to put together a...

    I believe he would need to put together a perfomance specification and get the quotes back and then he could come here for recommendations from the pros.
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    8,034

    kw=kw if no losses in transmission then no...

    kw=kw if no losses in transmission then no difference in efficiency
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    8,034

    What is the line voltage supplying the...

    What is the line voltage supplying the transformer? The difference will be the the losses in transforming the incoming to the correct voltage into the unit. In our plant we have 13.8 with large...
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    1,163

    Skyline chili is a chain in the area that has...

    Skyline chili is a chain in the area that has unique chili too. They are not fancy and are small but the chili is good.
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    +1 on Montgomery Inn. I take a day trip up to...

    +1 on Montgomery Inn. I take a day trip up to Cincinnatti just for thier ribs. I like the original location in Montgomery.
  8. I guess you are fortunate since we have to keep a...

    I guess you are fortunate since we have to keep a record of all refrigerant used and recovered by pound. They even check our records on occasion. Hope the EPA in your area do not do spot check on...
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    This following is my opinion. I believe the...

    This following is my opinion. I believe the safety regulations are being generated to protect those who do not have any idea what they are doing since many companies have done away with aprentiships...
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    Kentucky has State OSHA which can and is in this...

    Kentucky has State OSHA which can and is in this state stricter than federal OSHA and uses the general purpose clause a lot, Depends on State and local codes which I stated in the earlier post.
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    don't forget the local inspector, checking for...

    don't forget the local inspector, checking for permits can cite for the same reasons or notify OSHA if they think there is a violation depending on local state/city laws. They can and have been known...
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    some companies require contractors and any work...

    some companies require contractors and any work on site to meet these regulations. My company does this and audits contract work as well as their own.
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    If someone gets hurt on that bucket truck then...

    If someone gets hurt on that bucket truck then fines will be levied if it does not meet current codes. General purpose clause can be a rough one since it basically does not grandfather anything.
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    Basically local and osha are the ones who will...

    Basically local and osha are the ones who will enforce. There is a general purpose clause for osha that basically says that if there is a way to protect against an injury and it is not implemented...
  15. Thread: PLC

    by drjfjr
    Replies
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    4,377

    I have several pieces of equipment that used...

    I have several pieces of equipment that used PLC's as the temperature controller as well as control of the automation. The PID loop programing in a PLC is a real pain. To tune and maintain...
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    I am a controls engineer and it amazes me how...

    I am a controls engineer and it amazes me how many engineers have no common sense. Book sense yes but equipment and common sense no.
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    I was looking at the hybrid/dual fuel myself but...

    I was looking at the hybrid/dual fuel myself but due to gas rates going down locally and the expected life of a HP verses AC unit I am leaning toward the ICS furnace and the matching dual stage ac....
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    new member used to install

    I used to install residential units 28 years ago. Have been working on manufacturing automation since then mainly in controls and assembly equipment. Still try to stay up to date on new residential...
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    true insignificant heat loss based on the overall...

    true insignificant heat loss based on the overall btus for the house.
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    Is it possible some of the efficiency of the new...

    Is it possible some of the efficiency of the new high efficiency furnaces is used heating up the air coming from outside for combustion. To heat the exchanger the outside air at 0 degrees f has to be...
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