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Type: Posts; User: terpfan_

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  1. it looks as if someone drilled and tapped 2" pvc...

    it looks as if someone drilled and tapped 2" pvc tee and inserted a well into those threads. Drain down system unscrew old well insert new or reuse old with teflon tape and pipe dope. Insert sensor...
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    3,220

    I agree a drier could cause this problem. I am...

    I agree a drier could cause this problem. I am confused in your statement about indoor coil txv not allowing hot gas thru it. This is precisely what it does in heat pump mode, usually at about 80%....
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    3,220

    Correct me if I am wrong, but if txv on outdoor...

    Correct me if I am wrong, but if txv on outdoor unit were bad. Would you not pump down the low side due the outdoor coil acting as evap coil. Since this is happening so quickly I would look at rvr,...
  4. Yes, a secondary side short can cause primary...

    Yes, a secondary side short can cause primary coil to burn up. Make sure the secondary side has a fuse on it then see what happens. Loose wire, bad contactor, relay could cause this on a unfused...
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    1,839

    They are not inferior they are rated for size of...

    They are not inferior they are rated for size of system, but only under factory conditions.
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    4,330

    Try jumping out inducer so it runs all the time. ...

    Try jumping out inducer so it runs all the time. Then see if burner goes thru normal cycle. Also try taking inducer off board all together than jumping out pressure switch. Make sure gas is off. ...
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    3,606

    A common fan cycle switch would work to control...

    A common fan cycle switch would work to control head pressure. Johnson sells a bunch of models compatiable with 410a. A hot gas bypass could also help problem with solenoid to close bypass in...
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    2,308

    Without a combustion test how can we help you? ...

    Without a combustion test how can we help you? Check gas pressure inlet and outlet verify what nameplate calls for. The analzyer will give you o2, co,co2, efficency as well other things depending...
  9. Thread: Air Temp

    by terpfan_
    Replies
    4
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    811

    A line that was created just for RE Micheal. ...

    A line that was created just for RE Micheal. They were not offering high SEER equipment. Now with nordyne equipment they can up to 23 SEER. This also allows them to offer 10 year quality pledge. ...
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    2,436

    Would a tube in tube have been a better idea than...

    Would a tube in tube have been a better idea than plate xchanger? I will never go back to a regular water heater. My tankless rinnia was one my best investments.
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    1,648

    if you put in shut off valves your clean up will...

    if you put in shut off valves your clean up will be easier. When you go back to change driers.
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    2,951

    You never posted what happened in cooling mode. ...

    You never posted what happened in cooling mode. Superheat and subcooling readings would help. Also actual amp draw vs name plate. Does reversing valve sound like it is switching over?
  13. valve off make up and bypass and see if you still...

    valve off make up and bypass and see if you still have problem. B&G says to close outlet of prv when system is filled. could it also be just a leaking relief? not much else going to cause this...
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    1,439

    Run a new stat wire or go wireless. These are...

    Run a new stat wire or go wireless. These are your options if you want touchscreen
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    742

    Have you hooked a combustion analyzer up to...

    Have you hooked a combustion analyzer up to boiler? This can tell you all the data you need to correct issue. Without knowing your draft pressure you are only guessing
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    3,924

    never understood why all transformer don't come...

    never understood why all transformer don't come with built-in breaker.
  17. Replies
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    1,882

    Installing VAV systems on two small rtu is not...

    Installing VAV systems on two small rtu is not practical or cost effective. In my opinion a load calculation should be done. Then maybe split front and back of building into two smaller zones within...
  18. A few things to check. Is expansion tank...

    A few things to check. Is expansion tank supposed to be set at 12 psi (normally sent from factory at 12 psi). Is the Bypass valve and prv inlet shut after filling system. Boilers are not over...
  19. Replies
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    2,431

    Thank you

    Will double check my oil pressures today. Thank you for help.
  20. Replies
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    2,431

    Loud Trane screw compressor

    I have a new Trane chhb100tnlon119a compressor on a rtaa2154xu01a30abn chiller. My problem is this new compressor is much louder than other circuit. Amp draw, superheat, sub cooling, and oil...
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    530

    Siemens Micromaster 430 and 440

    I have two drives that are doing the same exact thing. They both are commanded on thru term 5+9 and have a a signal on 3+4. When the start button is pushed the display goes blank for a second then...
  22. Thread: DDC Training

    by terpfan_
    Replies
    1
    Views
    640

    DDC Training

    I am looking to broaden my hvac skills. Would like to know if there are any online training for the programming aspect of DDC. I have a limited knowledge of Johnson and Old Barber Coloman network...
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