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Type: Posts; User: danielthechskid

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  1. Replies
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    All of this makes me wonder a few things: 1....

    All of this makes me wonder a few things:

    1. Why are ECMs so unreliable? They are the exact same thing as a PC muffin fan just scaled up, and I have yet to see a muffin fan with DOA electronics...
  2. The current test per section is 25 multiple...

    The current test per section is 25 multiple choice questions each with 4 possible answers for a total of 100 questions. Mine was done on one of those fill in the bubble sheets that is later scanned....
  3. On a 3 wire dryer and range connection (NEMA...

    On a 3 wire dryer and range connection (NEMA 10-30 and 10-50) the 3rd prong is a neutral not a ground and hence should have been connected via 10-3 without ground wire to the neutral bar and not the...
  4. Having just tried and passed for my 608 Universal...

    Having just tried and passed for my 608 Universal I will say that the app mentioned by TEKIII helped, as well as other free practice exams online, and the Esco booklet. I did the practices and read...
  5. I will say this from personal experience: I'm...

    I will say this from personal experience: I'm with Space racer, we had an electric dryer (Neptune 5500) that would dry a load of blue jeans on auto in ~40 minutes when hooked directly to the outlet...
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    Thank you again joeyd, I'm sure it is just fine...

    Thank you again joeyd, I'm sure it is just fine too. When I went through the pump I removed the cartridge from the aluminum casting but I left the cartridge itself intact.

    The Robinair 15234 OTOH...
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    I only got it to hit zero twice, and only with...

    I only got it to hit zero twice, and only with the pump cold. Just tried it again and it goes to 4-5 microns as the lowest, still on the same oil. I haven't used it on a system yet but I have used it...
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    Multi-speed PSC and shaded pole motors under-volt...

    Multi-speed PSC and shaded pole motors under-volt themselves to increase slip on the lower speed settings via multiple taps in the run winding that act as an autotransformer. Run one on high and read...
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    Look at it this way, on a centrifugal blower or...

    Look at it this way, on a centrifugal blower or pump, flow=torque and pressure=RPM. Wrap a blower wheel with tape sometime and it will spin with almost no torque load. In a normal situation with the...
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    MOVs are surge/spike suppressors. What you are...

    MOVs are surge/spike suppressors. What you are thinking of is a negative temperature coefficient inrush current limiting thermistor that burns out. If it were an MOV then twisting the leads together...
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    My BluVac avatar.

    As requested, the story of my new YJ branded BluVac reading 0.0 microns.

    I got a pre-Platinum JB DV-200N vacuum pump with a bad shaft coupler from fleaBay, pulled it apart for sump cleaning, motor...
  12. Replies
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    There is only 1 way I would ever use a Nest: with...

    There is only 1 way I would ever use a Nest: with a relay isolation board equipped with backup dumb mechanical thermostats in series with R to kill the system if the Nest shorts and tries to turn the...
  13. Replies
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    Just look up high side detergent injectors for...

    Just look up high side detergent injectors for pressure (power) washers. They form enough of a vacuum to draw in liquid detergents and waxes from a non-pressurized container and mix it at a...
  14. Bovine excrement. The capacity of a given system...

    Bovine excrement. The capacity of a given system is based on the mass flow of the refrigerant being condensed and evaporated. Mass flow is controlled by the displacement of the compressor, which is...
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    The number one problem with DIY on here IMNSHO is...

    The number one problem with DIY on here IMNSHO is that we can't verify your credentials/knowledge on a case-by-case basis, and worse we can't verify the credentials of someone who does a search and...
  16. Replies
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    It back feeds because of how multi-speed PSC and...

    It back feeds because of how multi-speed PSC and shaded pole blower/fan/centrifugal pump motors work, they have an auto-transformer integrated into the run windings and intentionally under-volt...
  17. My point was that if the inverter is starting to...

    My point was that if the inverter is starting to trip off then either A. your DC wiring is too thin or B. you are over-discharging the battery causing its internal resistance to rise.

    If it is B...
  18. The inverter's low battery cutoff is working as...

    The inverter's low battery cutoff is working as designed. You really don't want to draw a true deep cycle lead-acid battery (read medical AGM or gel or golf car flooded) down below 50% SOC, and for a...
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    The only way I would use them is with isolation,...

    The only way I would use them is with isolation, IE condensing unit outside with a hydronic loop linking it to the house or building. The pressure relief valve would be outside too in case a...
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    The problem with that site is that it uses a...

    The problem with that site is that it uses a constant voltage source and dropping resistors. LEDs are current driven devices and their voltage drops as they heat up. If this will be used where you...
  21. Yep. My parents showed me this video. A short...

    Yep. My parents showed me this video. A short explanation on why 12000 BTU/hr is called 1 ton of cooling cleared that up really quickly.

    BTW I hate faux science videos on YouTube if you can't...
  22. It sounds like they are labeled as common on the...

    It sounds like they are labeled as common on the dual run cap not common of the motor itself. IE "common" goes to capacitor common and "cap" goes to capacitor fan.

    Sent from my SCH-R530U using...
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    All we can do is report the videos that in some...

    All we can do is report the videos that in some way violate YouTube's TOS, correcting the uploader via the comments won't work for long because they can censor us by deleting such comments or even...
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    It's stumped me. Failed 3uf 370v from an early...

    It's stumped me. Failed 3uf 370v from an early 80s Emerson single speed ceiling fan, top bulged hence terminals disconnected. No PCBs so I uncrimped the can, drained the oil, and unrolled and...
  25. Since it's resurrected anyway, has anyone tried...

    Since it's resurrected anyway, has anyone tried using the ribbon burner from an old furnace, seems like it would cover a much wider swath, but then I have never used the fire method personally.
    ...
  26. Replies
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    The condensing coil is all about rejecting heat...

    The condensing coil is all about rejecting heat from vapor at the dew point as rapidly as possible. If the coil is dirty, the discharge superheat is too high so lots of the vapor is above its dew...
  27. The residential AOP section reminds me of...

    this video.


    https://www.youtube.com/watch?v=hFFJk1-XCkk
    No matter how many times we say no DIY they still ask. Just like the trucks in that video. :gah:
  28. Looks like an LED edge lit LCD where not all of...

    Looks like an LED edge lit LCD where not all of the LEDs are working. The LEDs are connected in series strings and each string is individually current regulated, if something goes wrong the IC that...
  29. Replies
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    AFAICT if the board says that it will lock out if...

    AFAICT if the board says that it will lock out if hot and neutral are reversed then it is getting the flame rod voltage from the AC line, IE with them swapped there is no voltage rod-ground which...
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    What was up with the audio in that clip, some of...

    What was up with the audio in that clip, some of it was only on the left channel, some only on the right channel, none on both.
  31. Well, I just R&Red the HSI on my parent's York...

    Well, I just R&Red the HSI on my parent's York downflow (P3DHB12N07501A) in the house they just bought, looks just like the one in this post except upside down, and while I was in there I cleaned the...
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    #12, the evaporator is below freezing and making...

    #12, the evaporator is below freezing and making frost/ice, high side is a little too high, get the tequila and margarita mix ready, it's going to be a good day for someone. :cheers: (I don't drink)
  33. Replies
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    OK I'll try, suction side leak lost all the...

    OK I'll try, suction side leak lost all the refrigerant, vacuum on low side on compressor startup sucked in air, non condensable air in high side drove head pressure sky high, boom.

    I wouldn't...
  34. The best part of that is the VVS section of...

    The best part of that is the VVS section of driving the stake into the ground.


    https://www.youtube.com/watch?v=Bt9zSfinwFA
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    A couple of things to clear up about the portable...

    A couple of things to clear up about the portable ventless heater:

    It does not have an O2 sensor, it just has a calibrated torch flame on the pilot burner that barely touches the thermocouple tip,...
  36. Only a 750 millivolt gas valve, not like you need...

    Only a 750 millivolt gas valve, not like you need it or anything. :gah:
  37. A couple thoughts, PCs aren't nearly as sensitive...

    A couple thoughts, PCs aren't nearly as sensitive to bad power as many think, the first thing most non or passive power factor corrected switched mode power supplies do with the power is run it...
  38. Replies
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    Not on something with in-shot burners, 2 stage...

    Not on something with in-shot burners, 2 stage and variable furnaces slow down the inducer to match the lower gas flow. On a natural draft furnace underfiring would just cause heat exchanger to run...
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    Nope, part of the dining room that was walled in...

    Nope, part of the dining room that was walled in as a closet with studs and paneling with a return grille. There is no return ductwork, just 2 20x25x1 pleated filters (not 3M Crack-O-Matic) in an A...
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    This one is my furnace. It no longer has that...

    This one is my furnace. It no longer has that pesky condensate separator.

    318801
  41. AFAICT as long as you have a metering device that...

    AFAICT as long as you have a metering device that is correct for the compressor tonnage and 350-400cfm per ton you can run a larger evap coil, with a caveat, a too far over-sized coil won't have...
  42. Replies
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    Name is the same as on here and team is currently...

    Name is the same as on here and team is currently PC Pitstop (32035), though I'm thinking about switching to This Week In Tech TWiT (35054)
  43. Replies
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    Refrigerant compressors are measured in...

    Refrigerant compressors are measured in horsepower or kilowatts in other countries.

    For A/C 1 HP~= 1 ton.

    For larger temp differences BTUs per HP goes down so a 1HP compressor from a window...
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    Hence why even though my 3820 is liquid cooled...

    Hence why even though my 3820 is liquid cooled with the 120x240 rad, I have it at stock clocks with Speedstep on, so with FAH going it is @ 3.7GHz and 1.192V right now. I don't have deep enough...
  45. I'm watching a show about it on PBS now.

    I'm watching a show about it on PBS now.
  46. Replies
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    It would have been a better article if they had...

    It would have been a better article if they had actually called it refrigerant not coolant.
  47. Replies
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    Also as said direct phase change cooling uses too...

    Also as said direct phase change cooling uses too much power, and if you don't use an EPR to keep the saturated suction above the dew point or have an air tight enclosure around the evaporator you...
  48. Replies
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    My computer has 9 fans in it, Nzxt Tempest 410...

    My computer has 9 fans in it, Nzxt Tempest 410 Elite case, ASRock x79 Extreme4-m mobo so:

    PSU 120mm x1
    front 120mm filtered intake x2
    bottom 120mm filtered intake x1
    back 120mm exhaust x1
    top...
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    Yes I do, and your use of "to" should have had...

    Yes I do, and your use of "to" should have had two "o"s :grin2:
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    I've been wondering...

    Why the spelling of this smiley/emoticon is wrong?: :ditto:

    The code to insert it is correct with 2 "Ts" but the spelling on the sign is wrong, with only 1 "T".
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