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Type: Posts; User: mgenius33

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  1. Replies
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    I totally agree, ask some older service guys if...

    I totally agree, ask some older service guys if they have some tools they wouldn't mind "selling", don't ask for a hand out. More than likely they will give them to you, if you offer to pay. They...
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    What? Do you have two transformers?

    What? Do you have two transformers?
  3. Replies
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    You're painting with a very broad brush my...

    You're painting with a very broad brush my friend.
    3/4" line means nothing without length.
    Are you a homeowner or tech?
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    Rossco, Please elaborate on this. I'm a bit...

    Rossco,
    Please elaborate on this. I'm a bit confused. Are you saying there was another transformer of equal value in series, and out of phase with the other?

    If you're saying the primary and...
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    All circuits need a load, path and source. You're...

    All circuits need a load, path and source. You're scenario allows the ground to serve as the path back to source. So, your 2 grounds must connect in some way for current to flow. If the path is not...
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    You probably could have saved money by replacing...

    You probably could have saved money by replacing the lv fuse.
  7. Thread: Learnig hvac

    by mgenius33
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    That's the fun about diagnostics, if all safety...

    That's the fun about diagnostics, if all safety switches were 100% guaranteed to function properly, this job would be much easier.

    With that said, I always like to investigate as much as possible...
  8. What kind of checks are ok? Do you have a check...

    What kind of checks are ok? Do you have a check list?
  9. Replies
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    1,125

    I like Testo for accuracy, but the FieldPiece has...

    I like Testo for accuracy, but the FieldPiece has a wand for "in duct" readings.
  10. Replies
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    1,897

    Mal is now Richard Castle. He makes reference to...

    Mal is now Richard Castle. He makes reference to Firefly from time to time on Castle.
  11. Replies
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    1,897

    If his only ground is a gas line, there could be...

    If his only ground is a gas line, there could be stray ghost voltage coming from it, being induced by power lines wrapped around or run along side it. A gas line is not a proper ground.
  12. Replies
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    Gas valve solenoid might be shorting to gas line?...

    Gas valve solenoid might be shorting to gas line?
    Could be a coincidence.
    Poor ground.
    Had a Lennox a while back that was grounded only to the emergency switch via Romex. Needless to say this made...
  13. Yep, just a simple bypass type humidifier....

    Yep, just a simple bypass type humidifier.
    That's what I use, keeps the humidity level just fine in my house.
  14. Replies
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    Untrue, higher indoor temp, lower capacity, lower...

    Untrue, higher indoor temp, lower capacity, lower btuh /kW ratio.
    Need proof? Pull up expanded ratings from the equipment you install.

    Now, creature comfort level is another issue. Cooler air...
  15. LOL! I love the pictorial description advising...

    LOL! I love the pictorial description advising you to connect the brass "things" directly to the gas regulator taps.
    Uhh, I think they're called brass "barb" fittings.
  16. Replies
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    Check this manual install step #14....

    Check this manual install step #14.
    http://www.enerstat.com.au/sc-1manual.pdf
    Integral switches need to have minimum current of .08A in order to function. If the system does not draw this current...
  17. Replies
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    1,306

    What about ignitor voltage?

    What about ignitor voltage?
  18. Replies
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    2,369

    You're on the right track by logging usage, but...

    You're on the right track by logging usage, but like the others have said, logging the blower is useless. Why? Because it likely delays ~45sec each cycle on and ~120sec for each cycle off. How many...
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    Double check the 200, 210 & 340 setting. 340...

    Double check the 200, 210 & 340 setting.
    340 should not be shown if 210 is set properly, neither should 360 (the balance point cut out for aux heat)
  20. The most recent one is a Property Brothers...

    The most recent one is a Property Brothers episode, when Johnathan finds a sink wasn't draining, and then checks some other fixtures only to say, "hold on! We may have a major issue here!"
    Why...
  21. Is HGTV staged, or are their home inspectors complete MORONS!

    So, my wife and I are watching yet another catastrophic issue on an HGTV show that blows the new homeowners budget.

    The designers come up with these elaborate plans, only to discover one major...
  22. Replies
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    Yes, good point, check the wire as well. Though,...

    Yes, good point, check the wire as well.
    Though, I've never repaired an ignition control using this method. Not saying it's not the problem, but never worked for me.
    You're right though, that's...
  23. Replies
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    Obviously, to the consumer hard pipe is almost...

    Obviously, to the consumer hard pipe is almost always preferred. However, nobody wants to pay top dollar to have it installed. At twice the cost, it's hardly worth the value.

    To the contractor, we...
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    After main burner ignition, remove #5 terminal...

    After main burner ignition, remove #5 terminal wire from the 3-wire pilot off of the gas valve. If clicking stops, replace the 3-wire pilot, if not replace the ignition box.
    After ignition, the...
  25. Replies
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    3,280

    Here is a similar thread with HvacMedic & Jim...

    Here is a similar thread with HvacMedic & Jim Davis
    http://hvac-talk.com/vbb/showthread.php?955512-Combustion-Analysis&highlight=Air+speed+flue+temp

    I tend to agree with Medic that the issue may...
  26. Replies
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    Yes, your wake theory is a more plausible...

    Yes, your wake theory is a more plausible explanation. It would be nice to see a thermal image of this.

    I guess the unfortunate consequence of creating greater turbulence, and improving surface...
  27. Replies
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    The issue you are referring to is called "laminar...

    The issue you are referring to is called "laminar separation" the eddy currents are formed after the pocket or wake occurs. Do you understand the difference between laminar and turbulent?
    If the the...
  28. Replies
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    I would tend to agree that counter flow HX design...

    I would tend to agree that counter flow HX design is more efficient, but why are counter flow units typically less efficient?
  29. Replies
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    I have an old 80% 40mbtu furnace, I will try to...

    I have an old 80% 40mbtu furnace, I will try to find a 5 ton blower to test it.
    Damn, I need to build a test lab/ work shop!
  30. Replies
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    Thanks, I'm afraid I've jacked up this thread. I...

    Thanks, I'm afraid I've jacked up this thread. I will start my own in pro section.
    .
  31. Replies
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    Ok, well we can't post mfg performance data on...

    Ok, well we can't post mfg performance data on open forum, so maybe we could look at it in the private section.

    This is a great topic, and it is not my intention to discount anyone's expertise. I...
  32. Replies
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    I'm not finding this analogy to have merit. 1....

    I'm not finding this analogy to have merit.
    1. The size of the hand, or volume of airflow would make a difference.
    2. The direction in which the heat is traveling makes a difference. A candle...
  33. Replies
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    Thank you, Im interested to understand why this...

    Thank you, Im interested to understand why this is so.
  34. Replies
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    So, if we can all get back to learning, how does...

    So, if we can all get back to learning, how does the forced air heat exchanger differ from, a coil or radiator?

    I do appreciate constructive debate.
  35. Replies
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    Again, do we really need these personal attacks....

    Again, do we really need these personal attacks. If anyone on this site should refrain from such a sophomoric attitude, it would be an instructor, no?
  36. Replies
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    What? I do believe it contributes. Your...

    What? I do believe it contributes. Your explanation in post #28 leads one to believe it opposes heat transfer.

    It's probably best for you to not take to personal attacks on others when they oppose...
  37. Replies
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    "Turbulent water flow, like turbulent airflow,...

    "Turbulent water flow, like turbulent airflow, also reduces resistance to heat transfer."
    ..."turbulators, these devices create eddies as the water flows across them.
    Both methods of improving the...
  38. Replies
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    Sorry, I was a motorcycle road racer for 10...

    Sorry, I was a motorcycle road racer for 10 years. I've removed thermostats from radiators, if ithey were causing a flow restriction. The only risk was overcooling, not allowing for you engine to...
  39. Replies
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    Please show me one legitimate document that...

    Please show me one legitimate document that supports this claim.
    "Excessive flow will lower or stop heat transfer"
  40. Replies
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    Solar vacuum tubes, for heating water

    Solar vacuum tubes, for heating water
  41. Replies
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    3,280

    +1

    +1
  42. Replies
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    Sounds like something is miswired. Did it have...

    Sounds like something is miswired. Did it have multiple run capacitors? What is the model #?
  43. That's a bit of a hasty diagnostic don't you...

    That's a bit of a hasty diagnostic don't you think?
    No doubt, the inducer could very well be faulty, but there are a few more steps before charging someone 3-4 bills for a part.
  44. Like Rundawg stated, I think you need to T...

    Like Rundawg stated, I think you need to T connect into the draft press switch port to get a proper reading of the safety control operation.

    Keep in mind, the readings in the stack will be...
  45. Replies
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    665

    Not trying to offend you, but you may not want to...

    Not trying to offend you, but you may not want to mess with it if you're not sure how it works.

    If you applied for pro membership, we could provide manuals and detailed advice in the pro section...
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    This may help you get an idea about suggested...

    This may help you get an idea about suggested duct sizing.

    http://www.acca.org/wp-content/uploads/2014/01/Manual_D_verification.pdf

    Btw, your air volume at 820cfm for heating will give you a...
  47. Replies
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    Without a load calculation it's hard to say. One...

    Without a load calculation it's hard to say.
    One way to check is the old unit. What was the size and efficiency?
    Did it heat well for you in past heating seasons?
    Did it short cycle, leaving you...
  48. Replies
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    I did post #15, with the exception that you state...

    I did post #15, with the exception that you state the subcooling will rise, when in fact, a coil drenched in water will lower subcooling.
  49. Replies
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    As the others have stated, the pressure drop will...

    As the others have stated, the pressure drop will make little difference, especially knowing that most gauges are not accurate to 1psi at normal operating pressures.

    What is important is the fact...
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    They give you a range, because there are...

    They give you a range, because there are different variables involved in designed air flow.
    You have to take all of the variables into account when adjusting blower speed, including temp rise.
    To...
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