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  1. How do you get CO problems from a heat pump?

    How do you get CO problems from a heat pump?
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    Might work, might not. My guess is he fan will...

    Might work, might not. My guess is he fan will run but who knows how much air you'll move.

    BTW if the 2.5 you mention in the first post is in this unit, there is your problem, the 2.5 wasn't put...
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    ECM = electronically commutating motor. The end...

    ECM = electronically commutating motor. The end of the motor that holds the electronics is called to module.

    The way you are describing things is very confusing.

    Is the blower your trying to...
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    It is a proprietary motor made by Regal Beloit....

    It is a proprietary motor made by Regal Beloit. The GE name is a left over used for brand recognition.

    The 2.5 was found only in C/B equipment. You won't find a 2.5 in a Trane, 2.0 2.3 or a 3.0,...
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    The 2.5 was a proprietary motor to carrier /...

    The 2.5 was a proprietary motor to carrier / Bryant. There was a tool that could be used similar to the tech mate that is just for the 2.5. Your local C/B supplier should be able to get you one.
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    How do you know there was 38 oz of oil in the...

    How do you know there was 38 oz of oil in the compressor to start with, that number sounds like way too much, Resi compressors oil charge is usually expressed in CC's.
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    ^ ohms law stuff. I agree with the guy who...

    ^ ohms law stuff.


    I agree with the guy who pointed out the transformer issue, the system should have never run.
  8. Thread: Dual Fuel

    by Ed Janowiak
    Replies
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    962

    If my economic balance point is well below a temp...

    If my economic balance point is well below a temp where I'll get frost on the outdoor coil why would you want to set the heat pump to shut off if defrost cycles are required? That seems to defeat...
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    Target SH = [(3 x indoor wb) - 80 - ambient] / 2...

    Target SH = [(3 x indoor wb) - 80 - ambient] / 2 (F)
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    Then what is your next move? 17 degree split...

    Then what is your next move?

    17 degree split low load low SH the unit is low on capacity, dry bulb split should be way higher. If there is a hint of low airflow problem the split should have been...
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    Or do CFM x TD x .317 = watts output Divide...

    Or do
    CFM x TD x .317 = watts output

    Divide by watts input to calculate COP 😁
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    BTUH/ (TD x 1,08 ) = CFM Amps x volts x 3.412=...

    BTUH/ (TD x 1,08 ) = CFM
    Amps x volts x 3.412= BTUH

    The 1.08 and 3.412 cancel out to 3.16
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    if you question the airflow why not just measure...

    if you question the airflow why not just measure it?

    Run elec strips at same fan speed as comp runs -
    amps x volts / TD x 3.16 = CFM

    Quantify and stop guessing :cheers:
  14. Why would you need to know what direction the...

    Why would you need to know what direction the room faces? The largest heat loss would happen in the dark wouldn't it?
  15. Thread: EPA cert

    by Ed Janowiak
    Replies
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    429

    www.eh-cc.org Too bad I didn't see this till...

    www.eh-cc.org

    Too bad I didn't see this till now, I'm doing a 608 review and test tomorrow in Pleasantville. If all you want to do is test, call the office and you can test on line at your...
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    I think you'll miss the snow :putergreet:

    I think you'll miss the snow :putergreet:
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    1,597

    I believe the 80 / 20 mix with the oil will...

    I believe the 80 / 20 mix with the oil will result in zero problems. Flushing to get rid of contaminants is good, flushing to rid the piping of oil is a scam. I like 407C more and more every day.
    ...
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    A "tight" shaft on a motor with permanent magnets...

    A "tight" shaft on a motor with permanent magnets is normal. Ohm the motor out like any 3 phase motor to see if it's good. A spin test on the shaft with a comparison to a PSC motor is not a a good...
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    Cool, that's why I asked :-). Gunslinger, yes...

    Cool, that's why I asked :-).

    Gunslinger, yes the new version will be out soon.
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    Can you clarify what you mean there? Manual S...

    Can you clarify what you mean there?

    Manual S is not a guess at anything, it's a procedure to select equipment and recommend airflow based on the SHR and BTUH loss provided by Manual J.
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    thanks for the help fellas, i looked for a while...

    thanks for the help fellas, i looked for a while and came up blank on both glad i asked.
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    AHRI cert #

    I'm having a difficult time finding AHRI reference numbers for these combo's, can anyone lend a hand please.

    Goodman:
    OUTDOOR model SXC180361AC

    INDOOR ARUF36C14BB

    Goodman:
    OUTDOOR...
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    So you want split hairs about this but ball...

    So you want split hairs about this but ball parking the actual selection is ok, I'm sorry I said I was done before but this was too good not to mention, have a good night.
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    You added this after my last reply. Highly...

    You added this after my last reply.

    Highly technical ? I call that doing it correct and not ball parking, LOL, you win I'm done.
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    Fan speed affecting SHR is covered in Manaul S,...

    Fan speed affecting SHR is covered in Manaul S, what you are leaving out is the total capacity will start to drop as latent work disappears. If you can produce application data with the high airlfows...
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    Show me application data for a 2 ton split unit...

    Show me application data for a 2 ton split unit running 600 CFM per ton. I've never seen a resi split over 500 per ton. If this info doesn't exist what might happen theoretically is moot.

    I have...
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    If you install a 2 ton system on a 22k gain with...

    If you install a 2 ton system on a 22k gain with a SHR of .98 you just installed a unit that does not have enough capacity to meet the gain.

    SHR is sencible gain divided by total gain. With this...
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    Sure about that? ...

    Sure about that?

    http://i591.photobucket.com/albums/ss352/EdJanowiak/null_zps4d3970c5.jpg
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    Close all the windows in the house, close all the...

    Close all the windows in the house, close all the doors and turn on all the fans in the house (furnace / air handler/ kitchen / fart etc) and see if the water heater is still drafting, my guess is...
  30. Yes, yes it is. St Louis was the best standard...

    Yes, yes it is. St Louis was the best standard air discussion I witnessed.


    Didn't know I could subscribe without making a post.
  31. I'm not permitted to comment in this forum, but...

    I'm not permitted to comment in this forum, but I'm doing so to get emails when this thread updates. I've seen some really fun discussions on this topic in person from some of the participants, and...
  32. When you say "maxes out" do you mean the units...

    When you say "maxes out" do you mean the units stops cycling and the temp starts to rise in the space?

    If so, you have never seen a system installed after an accurate load calc was performed. It's...
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    Wright J moble does block load calcs, you need...

    Wright J moble does block load calcs, you need room by room to do a duct layout.

    I see the value and time savings in a computer based load calc but just don't see it in the duct design. I see so...
  34. Is it a good way to do a calc? Ballpark yes truly...

    Is it a good way to do a calc? Ballpark yes truly accurate? No.

    In the world of good better best, it's good (it's a dumbed down version of 7). The abridged version of 8 is better and best would be...
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    The disks are done by Jack Rise, they are very...

    The disks are done by Jack Rise, they are very good at explaining step by step how to fill out the friction rate worksheet and how to select the proper size ducts as per Manual D.
    The first RSES...
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    Manual J gives you your sensible & latent gains,...

    Manual J gives you your sensible & latent gains, Manual S explains how to manipulate your SHR's with different air flows by looking at the application data, very logical and actualy simple once you...
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    Your total gain is the sensible gain plus the...

    Your total gain is the sensible gain plus the latent gain. If you divide the total gain into the sensible gain it will give the SHR of the space (sensible to latent ratio).

    A "perfect" match is a...
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    Total capacity will be higher with a higher...

    Total capacity will be higher with a higher sensible heat ratio. Higher air flow will give you a higher SHR, lower airflow produces a lower SHR. You should match the SHR of your equipment to the SHR...
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    In heating (heat pump only): CFM x TD x .317 =...

    In heating (heat pump only):

    CFM x TD x .317 = Watts output

    Watts output x 3.412 = BTUH

    This thread shows how to do the AC EER calculation.
    ...
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    You just described the difference between zeroing...

    You just described the difference between zeroing a gauge and calibrating a gauge, nice job. :det:
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    If you understand how to fill out the friction...

    If you understand how to fill out the friction rate worksheet all the effective length charts as well as the excel version of the friction rate worksheet can be downloaded free on the ACCA website....
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    Line of sight is my answer for the TD question...

    Line of sight is my answer for the TD question (avoid it). A way to convince yourself is to simply take the temperatures in multiple locations and draw your own conclusion.

    Amp draw question. ...
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    Klenks are the best snips of any I have ever used.

    Klenks are the best snips of any I have ever used.
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    795

    If an x-13 receives a signal from more than 1...

    If an x-13 receives a signal from more than 1 tap, it runs at the higher speed. If it receives a signal on all taps it runs at the highest speed. It is designed to receive multiple signals and know...
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    It's in the install instructions. But off the...

    It's in the install instructions.

    But off the top of my head, you have to set the gas pressure in low fire (you find low fire scrolling through the set up on the personalty mod) I wana say at...
  46. Thread: EPA test

    by Ed Janowiak
    Replies
    3
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    408

    http://www.escoinst.com/ They have practice...

    http://www.escoinst.com/

    They have practice exams.
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    The motors are programmed to mantain a constant...

    The motors are programmed to mantain a constant RPM / torque value which is going to fluxuate depending on SP. the higher the SP the more torque and higher RPM will be required to mantian CFM. The...
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    No, the product you describe dos not exist. ...

    No, the product you describe dos not exist.

    All caps = shouting, shouting will not get you more responses, it will have the opposite effect.
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    Why dont you want round?

    Why dont you want round?
  50. I have a very throrough understanding of the...

    I have a very throrough understanding of the topic, but I find your persistence to try to prove things that I have many years of experience with to be wrong with BS analogies to be very entertaining...
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