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  1. Replies
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    243

    It will give you the total capacity of the...

    It will give you the total capacity of the system.
    If you can accurately read the condenser fan cfm, and temp diff. Then simply use sensible heat formula - fan & compressor heat.
    Good luck with...
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    358

    I would test for the root cause, and yes I would...

    I would test for the root cause, and yes I would advise in many cases the blower will fail in the near future.
    You could also perform a motor winding insulation test. This may or may not prove to...
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    687

    From what I've read dealing with multiple motor...

    From what I've read dealing with multiple motor equipment having internal over load protection , the Min Amp rating is given by calculating 125% the largest motor's RLA + 100 % all other motors' RLA.
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    687

    You may want to read Timebuilders post and take...

    You may want to read Timebuilders post and take his suggestion to read article 440...
  5. Typically you would size the supply vents by the...

    Typically you would size the supply vents by the amount of throw or face velocity you are trying to achieve. Normal range is usually 400-600 fpm.

    With 20 4"x10" supplies delivering 1200 cfm, your...
  6. I wonder if this a solid state stator design? I...

    I wonder if this a solid state stator design?
    I bought a gasless yard trimmer a year ago with this technology.
    http://coreoutdoorpower.com/technology/

    I made a post about it, but only one...
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    1,275

    With a cap double the rated size, you may have...

    With a cap double the rated size, you may have over heated the compressor, but the internal over load would take it out. Continually overheating a compressor can cause not only windings to weaken,...
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    896

    I'm not understanding the math. Where did the...

    I'm not understanding the math. Where did the extra multiple of 1000 come from?
    You're saying a 3/4hp motor will supply 33,557,000 watts of work in an hour?
  9. Replies
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    896

    33557 kWh is 33,557,000 watts per hour?

    33557 kWh is 33,557,000 watts per hour?
  10. Replies
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    570

    The formula is to calculate reactance. XC = 1 /...

    The formula is to calculate reactance.
    XC = 1 / (2 π x f x C)
    Where:
    XC = capacitive reactance
    f = frequency
    C = capacitance
    Π = 3.141592654

    So, we take the known 1/ (2 π x 60) = 0.00265258
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    2,514

    I'm on my 3rd pair of Dr. Martens in 3 years....

    I'm on my 3rd pair of Dr. Martens in 3 years. They are the most comfortable full leather shoes I've worn. I can't do boots...
    The first pair is not worn out I just scuffed them up and got them too...
  12. I never understood,"trade-in" or "buy-back"...

    I never understood,"trade-in" or "buy-back" programs from mfg's. It's kinda misleading, as if we can do something with the old junk unit, besides scrapping the metal.
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    845

    Masters licenses in each field you plan to...

    Masters licenses in each field you plan to perform work in, and a contractors license A,B, or C.
  14. Replies
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    1,945

    The input legs L1 & L2 polarity in respect to one...

    The input legs L1 & L2 polarity in respect to one another, have absolutely no bearing on direction.
    The relationship of the run winding to start winding to capacitor are what can alter rotation.
    ...
  15. If it's a standard psc motor, the power...

    If it's a standard psc motor, the power consumption will reduce with greater static, it just won't move as much air.
    Which is odd because this year you reduced static increasing the power...
  16. Replies
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    346

    There's nothing crude about a hand-held...

    There's nothing crude about a hand-held anemometer. They make several useful types of air flow measurement devices. A good technician should have something to get close enough to make the system...
  17. Replies
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    535

    The cap with the resistor is a trickle circuit...

    The cap with the resistor is a trickle circuit for crank case heat. It remains energized without the contactor pulled in. This has been discussed in length many times in the pro forum. Why do you not...
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    346

    Typically a 2 story home will have heat migrate...

    Typically a 2 story home will have heat migrate upstairs, however that is a very large temperature difference, especially with a zoning system.
    It sounds like the dampers may not be functioning...
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    346

    Why are you unsure about the installation? Does...

    Why are you unsure about the installation? Does the system not heat or cool the space to the desired comfort level?

    Anemometers can be very accurate if used properly.

    You're kind of ambiguous...
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    RC811002, what are you trying to accomplish? ...

    RC811002, what are you trying to accomplish?

    Are you just testing to learn, or trying to set up your furnace?

    If you are testing to learn:

    1. Turn on furnace and allow min. 10 min operation...
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    312

    The total area of the conditioned space includes...

    The total area of the conditioned space includes internal air gaps in wall spaces. So, exterior measurements are used not interior.
    If you were going to include the R value of the exterior garage...
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    903

    There should be a static vs cfm blower chart from...

    There should be a static vs cfm blower chart from the mfg.
  23. Did you check the drain line? Is the trap...

    Did you check the drain line?
    Is the trap vented properly?
    Are you T'ing into both + & - sides of switch, for diff press?
    What does the diagnostic LED show?
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    It means "double", or "times two" what...

    It means "double", or "times two" what Snapperhead stated.
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