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  1. Replies
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    By the time you charge for the research, travel...

    By the time you charge for the research, travel time, wire cost, and labor, you might as well just order a new heat kit. Not to mention the customer will have a much longer part warranty, and you...
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    Drills are very important for service and...

    Drills are very important for service and install. I would get both mini 12v impact and the larger 18v hammer drill. Whatever brand is fine.
    I have the Makita 10.8v/12vmax impact/ LED flash light...
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    Remove the DF board, flip it over. Grab your...

    Remove the DF board, flip it over. Grab your soldering iron and repair the cold solder joint behind the CC terminals.

    If it's not that, you may have two loads in series, which again would lead to...
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    Why do people get so upset when they are asked to...

    Why do people get so upset when they are asked to follow a procedure for help?
    Why do people think you should get DIY information on a site that explicitly forbids it in the RULES section.
    Why do...
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    They were used on the Pulse furnace. Why would...

    They were used on the Pulse furnace. Why would you use them on any other furnace?
    ...
  6. Replies
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    I recently installed a modulating Trane XC95m for...

    I recently installed a modulating Trane XC95m for my downstairs. I love it. I don't know why someone that can afford it, would not want one.
    We've installed quite a few of them, and customers rave...
  7. Cordless drill chuck wobble, radial runout

    Just got a new Ridgid brushless cordless hammer/drill and watched the chuck wobble.
    I don't remember this issue with old drills back when they were made in the USA.
    So, I tested some of my recent...
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    liberal ˈlib(ə)rəl/ adjective 1. open to...

    liberal
    ˈlib(ə)rəl/
    adjective
    1.
    open to new behavior or opinions and willing to discard traditional values.

    Not to be confused with Democrat or Republican.
    You're right, the lines are very...
  9. Replies
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    Sounds like you gave them a free diagnostic. ...

    Sounds like you gave them a free diagnostic.

    Second opinions should be limited to compressors and heat exchangers.
    If you go any further at no charge, you can site your code violations and advise...
  10. I don't know what your floor level is, but this...

    I don't know what your floor level is, but this code may help you to get a back water valve installed by the super.

    IPC 715.1 Sewage backflow.
    Where plumbing fixtures are installed on a floor...
  11. Sounds like a problem with drain sizing or...

    Sounds like a problem with drain sizing or venting. Obviously, the plumbing is all tied together.

    The adjoining units may be tied in on a horizontal line. I would think if at all, they should be...
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    Input voltage will affect motor performance.

    Input voltage will affect motor performance.
  13. Replies
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    If I were to choose, I would choose erratic...

    If I were to choose, I would choose erratic refrigeration.
    Not to say erratic refrigeration couldn't be caused by another issue, but the low pressure symptom is not going to direct you toward...
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    Is the transformer common grounded to the...

    Is the transformer common grounded to the chassis?
    Have you hi pot tested the #2 compressor?
    Sounds like stray voltage somewhere.
    Is it 1 or 3?
    Is there a second circulator that runs with stage...
  15. It was late when I wrote this. So, it wasn't...

    It was late when I wrote this. So, it wasn't fully explained how the formulas were integrated.

    If you've ever looked at a passive crossover for an audio speaker, you'll notice it uses capacitors...
  16. Correction

    Correction
  17. The science is basic math. E/IR, where R is used...

    The science is basic math.
    E/IR, where R is used for reactance measured as Ω's.
    R or XC is found by XC = 1/(2 π x f x C)
    f is frequency, and C is capacitance
    2pi represents a full sine wave in...
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    I see what you mean, by the post title, but the...

    I see what you mean, by the post title, but the description leads me to believe it's a heat pump system that continues to heat. Whether or not the od unit cycles on and off isn't detailed. Sounds...
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    My experience with CPS gauges and hoses.......

    My experience with CPS gauges and hoses....
    C-heap
    P-iece
    S-$€#

    Hopefully if they're asking $500 for a set, they will last longer than a couple months, like their ball valve hoses.
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    Stuck sequencer, or shorted aux heat coil,...

    Stuck sequencer, or shorted aux heat coil, shorted w wire.
    Pretty easy, if he's a tech.
    Just follow the 24v signal.

    I guess if it shuts off, it wouldn't be the shorted coil.
    Could be bad...
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    BS! There are thousands of these systems in our...

    BS!
    There are thousands of these systems in our area. Most units aren't even equipped with the newer auto circulate function.
    These systems aren't cast iron where water becomes black.
    These coils...
  22. Replies
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    431

    We have a lot of hydro heat systems (aka...

    We have a lot of hydro heat systems (aka "Apollo") here, using high capacity water heaters. 40gal 60Mbtuh input.
    Sometimes the homeowner complains of a lack of hot water for showers in the...
  23. Replies
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    ...and void the UL. Now, when it burns up you...

    ...and void the UL.
    Now, when it burns up you are responsible.
    Wish it were the good ol days, where a tech could be a tech...
  24. If you use an aftermarket board, be sure to check...

    If you use an aftermarket board, be sure to check reversing valve operation. Rheem & Rudd typically energize in heat rather than cool.

    Also, if a load shed is connected, they may be de-energizing...
  25. Sounds to me like they have a load shed control...

    Sounds to me like they have a load shed control breaking the heat pump.
  26. Replies
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    Pressure switch or draft issue making the...

    Pressure switch or draft issue making the pressure switch intermittently drop out is my suspicion as well.

    If you're a tech you should know how to test all of the safety controls. If not go over...
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    We've installed Fujitsu and Mitsubishi. No...

    We've installed Fujitsu and Mitsubishi.
    No problems that I know of.
    Both have good tech support, never had a problem getting through, spoke to an American that spoke proper English, and they...
  28. THANK YOU Travis & Fieldpiece Instruments!

    Wow, is all I can say. I've never had a company take care of me like this.
    It's refreshing to know there are still companies that really care about their customers.

    With a slow season upon us in...
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    Thank you Travis! You all have been extremely...

    Thank you Travis! You all have been extremely considerate to us consumers.
    Again, your customer service goes unmatched.

    I'm shipping out to you my SMAN3 ASAP!
  30. Replies
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    I may have too much work to repair now. 1....

    I may have too much work to repair now.
    1. Cracked plastic housing
    2. Leaking gauge micron wires
    3. Ovaled pressure sensor barrel (didn't realize you need to leave the packing nut in there when...
  31. Replies
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    SMAN3 micron sensor leaking!

    Just using my trusty SMAN3 gauges and started hearing a hiss.
    Checked all the ports, hoses and valves, but could not locate it.
    So, I opened up the plastic housing which has now cracked, and found...
  32. Replies
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    That's a flexible connector, not CSST. It is...

    That's a flexible connector, not CSST. It is listed for use outdoors as well as indoors.
  33. Replies
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    Why? One vacuum pump with larger hoses would be...

    Why? One vacuum pump with larger hoses would be faster.

    Here's a good video on th subject.
    http://www.trutechtools.com/Rat-Shack-Vacuum-Training
    His basis is on a book written in the 50's I...
  34. Replies
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    Doesn't matter, you're only going to move a...

    Doesn't matter, you're only going to move a certain cfm through those hoses.
    So, a 6 cfm will not be twice as fast as a 3 cfm.
    It might be 5-10% better if that.

    Volume of a tube πR x L
  35. Your inputs are wrong. There's no way you have 45...

    Your inputs are wrong. There's no way you have 45 ft ceiling.
    The inputs are ft for each type 1 & 2. What you have is the dimensions.
    Example: ceiling type 1: 45, type 2: 45
    The types are...
  36. Replies
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    Welcome back. Are you starting your own company,...

    Welcome back.
    Are you starting your own company, or working for the man?
  37. Please do!

    Please do!
  38. I'm curious as to where you're noting the...

    I'm curious as to where you're noting the necessity for using the NEC 250.66 table, as you would use for water piping through 250.104 (A)(1).
    Whereas other metal piping including gas piping is in...
  39. Electrical box? Well, only an electrician should...

    Electrical box? Well, only an electrician should go in there. However, since the grounding electrode (for the electric service) is external, and if your jurisdiction allows it, you can bond it there....
  40. According to NFPA 58 grounding of the LP system...

    According to NFPA 58 grounding of the LP system is not a requirement.
    Sec: 6.20.1.3, & A.6.20.1.3
  41. Let me follow that up with, "in my locality"....

    Let me follow that up with, "in my locality". Some other localities may allow HVAC contractor to install the bonding conductor.

    Also, I'm not sure where thermofridge is getting the conductor...
  42. This should definitely not be in the open forum....

    This should definitely not be in the open forum.
    Also, bonding the gas line is not considered incidental to the mechanical installation, and should be performed by a certified electrician.
  43. Replies
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    Once you learn what your doing you will likely...

    Once you learn what your doing you will likely alter the data.
    For example, ManJ shows my area at 22 heating temp and 92 cooling.
    Hahaha, what a joke. The past couple years we had winter weather...
  44. PNW4ME, as the return payment for helping, we...

    PNW4ME, as the return payment for helping, we need your follow up on how the job turned out.
    Don't leave us all hanging bro...

    Just a note:
    Most all of the pros here love what they do, it's just...
  45. I have the SMAN3. When I used them to pull a...

    I have the SMAN3.
    When I used them to pull a vacuum, I would swap the suction and center hoses. I did this because the vacuum sensor is in the center port of the manifold set. So if you have the...
  46. Replies
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    Whenever I have knee pain, I grab the compression...

    Whenever I have knee pain, I grab the compression sleeve. It works wonders, I don't know the details why, but it works for me.
    Pain goes away within a day or two, and doesn't come back for months...
  47. With a fried compressor, you should have taken...

    With a fried compressor, you should have taken more steps than swapping the outdoor unit, or you'll likely have a short lived new unit.

    You should hurry up and get your post count up to 15, then...
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    It is. You don't need to consider latent heat...

    It is.
    You don't need to consider latent heat either, as there is no change of state with the condenser air.
    However, the very difficult part is calculating cfm, and true watts to heat.
    Unless you...
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    ::DD:::DD:::DD:::DD: Whew! That was a good...

    ::DD:::DD:::DD:::DD:

    Whew! That was a good one!


    Ark, this is why Trane patented the "spine fin" all aluminum coil.
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    They can receive PWM and modulate airflow...

    They can receive PWM and modulate airflow according to demand.
    For instance the XV20i can reduce to 25% capacity.
    You have to have the proper stat to control the airhandlers though.
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