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  1. Replies
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    good for better

    I want to try out stonefly's method. I haven't done that before but I'm open minded to abandon good ideas for better ones if that's the case.

    <snip>
    "crosshatch an "X" on the suction line, deep...
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    Re: Why TXV

    Turn in your gauge set, your a disgrace to the cause.
  3. Replies
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    1,662

    hummm, you are not using the words of the...

    hummm, you are not using the words of the initiated. One must speak of super heat, sub cool, evap saturation temp, cond saturation temp,... to get answers to refrigerant cycle questions round here.
    ...
  4. Re: Aging and efficiency

    If you just had a 14 SEER installed yesterday by 70% of the licensed contactors in Maryland there is a good chance that it is operating at 10SEER because they are the same people that installed the...
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    I'm a HO

    I'm a HO
  6. Replies
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    Re: good reasoning

    I get dangerous where I get bored.
  7. Replies
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    1,846

    aluminmum

    aluminmum
  8. Replies
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    I would do it. The slight risk from my point...

    I would do it.

    The slight risk from my point of view is that if the valve is oversized it may "hunt" or over cycle, but 1.5T CU and a 2T AHU w/ 2T TVX should work just fine. They only come in...
  9. Replies
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    Here, Here on the low volt. If your guys lack...

    Here, Here on the low volt. If your guys lack electrical knowledge than let a real tech close up and let him charge it too. Anybody that can't close up the control wiring probably shouldn't close out...
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    http://img102.imageshack.us/img102/5641/txv3qv.jpg...

    http://img102.imageshack.us/img102/5641/txv3qv.jpg


    Spolan makes the valves, very good ones, then I decide the application , then test out the system by cycling it though a range of heat...
  11. Replies
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    I do like your idea. I'll try that. Man, I learn...

    I do like your idea. I'll try that.
    Man, I learn all this tricks on this site.
  12. Replies
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    http://img81.imageshack.us/img81/5666/psych13cn.jp...

    http://img81.imageshack.us/img81/5666/psych13cn.jpg
  13. Replies
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    Since it's to hot to stay inside, did you watch...

    Since it's to hot to stay inside, did you watch the Shuttle launch?
  14. Replies
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    Recover R22 to clean bottle or pump down, R&R...

    Recover R22 to clean bottle or pump down, R&R coil, clean, vac to 300 mics, close up with N2 back shielding, recharge per metering device proper (so that it's right for the first time), clean blower...
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    This guy, cuz that what I want to start using for...

    This guy, cuz that what I want to start using for this trick. How well does this work for you?
    http://img205.imageshack.us/img205/2116/recoverypliers4tb.jpg
  16. Replies
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    "Husband tried to vacuum it and all of this stuff...

    "Husband tried to vacuum it and all of this stuff is stuck to it and won't even scrape off without taking part of the fins on the coil."

    Ahhh, my favorite, DIRT CAKE. That cement mix that happens...
  17. Replies
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    Sporlan Bulletin 10-9

    And here on Sporlan Bulletin 10-9

    http://img224.imageshack.us/img224/4606/sporlan5mx.jpg
  18. Replies
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    Thanks Norm. I Read your book (one of them)....

    Thanks Norm.
    I Read your book (one of them).
    See you in October
  19. Replies
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    Is that Psychrometric Norm?

    Is that Psychrometric Norm?
  20. Replies
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    know when to fold um

    low pressure guy has a point if your ambitious, just be very careful not to stroke the face of that coil across the fins an fold them down.

    low pressure guy, do you own Dywer Instruments?
  21. Replies
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    "I had a tech come out the other day but said he...

    "I had a tech come out the other day but said he wouldn't touch the system to service it, only replace it entirely."





    This is what I call a "clip board tech". He owns $20 in HVAC tools to...
  22. Thread: Vacuuming Coil?

    by mdman
    Replies
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    2,112

    $10 worth

    <snip>
    Said it looked and felt like a flannel jacket!
    </snip>

    Like this one? pulled off the return side of a cased coil. LOL

    $10 if you can guess the static pressure drop accross this mess.
    ...
  23. Replies
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    a) The location of the leak was established b) I...

    a) The location of the leak was established
    b) I assume the "Gauges indicated a vacuum" when the perfectly operational compressor pull said vacuum due to lack of refrigerant
    c)Where did he "rack up...
  24. Replies
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    That's ok, a lot of 20 year veterans, lead...

    That's ok, a lot of 20 year veterans, lead service managers, and state license holders don't do low voltage real well either.
  25. Thread: Wierd Pressures

    by mdman
    Replies
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    680

    or he can call your mama

    or he can call your mama
  26. Thread: Wierd Pressures

    by mdman
    Replies
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    680

    Anybody that says the air flow is "ok" didn't...

    Anybody that says the air flow is "ok" didn't measure anything.

    Stop referencing worthless pressures when saturation temperatures are then only thing that have an meaning (regardless of...
  27. Thread: Wierd Pressures

    by mdman
    Replies
    8
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    680

    With a vocabulary like than, then what are you?...

    With a vocabulary like than, then what are you? an ME, a EE, and a meteorologist that doesn't mind getting his hands dirty?

    BTW, state licensing nor certification equate to competency. Most of the...
  28. Thread: recovery pliers

    by mdman
    Replies
    4
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    658

    it mashes the tube doesn't it?

    it mashes the tube doesn't it?

    I've never seen them used, but that's what I wound guess from looking at them.

    Thanks,

    md
  29. Thread: recovery pliers

    by mdman
    Replies
    4
    Views
    658

    Question for anybody using these "recovery...

    Question for anybody using these "recovery pliers". What kind of condition does it leave the copper section in? Does it collapse or damage the piece?

    I wish to know if this is a useful tool for...
  30. Replies
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    Slackjaw is right

    Slackjaw is right, this place is full of self-righteous "professional members" tooting their horn.

    You could also put the system under light N2 charge and drill into it to blow the drill cuttings...
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    It's keeping that patch of grass nice and cool.

    It's keeping that patch of grass nice and cool.
  32. Replies
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    Yeah, but next time you replace a circuit breaker...

    Yeah, but next time you replace a circuit breaker you'll get code popped for your good karma.

    On fuses, I carry a gross of 3A ATO's and insolated spade connectors. I fuse all secondaries were the...
  33. Replies
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    First of systwm age means little and SEER is a...

    First of systwm age means little and SEER is a sticker on the side of a manufactured unit. Second, unless your 2400 sq ft is a green house you are not getting 5 tons or 5 tons any where else outside...
  34. Thread: short cycling

    by mdman
    Replies
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    1,098

    "Well built" is not the problem. Weather it's...

    "Well built" is not the problem. Weather it's well built or cra p built we have an enduring problem, that being fixed or discrete capacity, a variable load, and one thermal mass.

    If you take your...
  35. Replies
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    power "stealing" stats

    keepitsimplestupid,

    add to that list...

    power "stealing" stats and making them work on IFCB (integrated furnace control boards) with isolation relays (hey don't like trickle current).

    dual...
  36. Replies
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    The UHF ambient transmitter makes it about 7 feet...

    The UHF ambient transmitter makes it about 7 feet on good batteries, the %RH is never even close (and I compare to a very nice power psychrometer), the system only uses the ambient to display (window...
  37. Thread: Unit is sweating

    by mdman
    Replies
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    829

    Dam it, keepitsimplestupid, got the drop on me....

    Dam it, keepitsimplestupid, got the drop on me.
    Oh well,


    You may have infiltation problems in combonation with low duct insolation.

    For example if you have return leaks pulling down that...
  38. Thread: short cycling

    by mdman
    Replies
    9
    Views
    1,098

    As you seam to know by " ", elect stats don't...

    As you seam to know by " ", elect stats don't have a resistance anticipator to bias the bi-metal. They should have an understandable set-point diff setting but instead like to talk about ambiguous...
  39. Replies
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    Nile Cold Climate Heat Pump (CCHP). It's a two...

    Nile Cold Climate Heat Pump (CCHP).

    It's a two stage / two comp system for solving the high lift problem.

    You still lose COP with decreasing ambient but I guess this one doesn't flat line...
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    Right on

    So righteous and he's not even a "pro-member", LOL.

    Right on keepitsimplestupid, tell um.
  41. Replies
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    Just make sure you don't let anybody tell you,...

    Just make sure you don't let anybody tell you, "they don't make 10 SEER compressors anymore".

    They don't make 10 SEER outdoor units, well not for you anyway, export, domestic 5.5 Ton plus, and...
  42. Replies
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    "It is cheaper in the case of the VisionPro...

    <snip>"It is cheaper in the case of the VisionPro to buy it online and hire a licensed electrician to install it than buying it from a HVAC guy and having them install it. You can buy a nice big...
  43. Thread: short cycling

    by mdman
    Replies
    9
    Views
    1,098

    Yes you can get stats that will let you widen the...

    Yes you can get stats that will let you widen the set-point differential. Watch out for nomenclature differences as I know one stat that calls this "dead band". Although it's a dead band of sorts,...
  44. Replies
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    and don't worry much about the CCH (crank case...

    and don't worry much about the CCH (crank case heater). The well type are PTCR and only run around 40W. The band type are usually fixed resistance and of a bit more true power but the comp will be...
  45. Replies
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    Oh, I just read that you got 42A peek, that's...

    Oh, I just read that you got 42A peek, that's very typical inrush for 11A running. Can you tell what the duration of that inrush is or just as useful can you catch the voltage drop (ideally at the...
  46. Replies
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    impedance and closed circuit voltage

    It's either...

    the load (compressor),
    the CB, or
    the branch impedance (conductor and all contacts in series)

    If you have a high-end meter that captures inrush current, or maybe a less expense...
  47. Replies
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    1,015

    I'm far more use to single floor slab on grade...

    I'm far more use to single floor slab on grade homes with split systems, attic supply, and single point returns.

    I see this side discharge package unit with a plenum connect to the craw. The...
  48. Thread: weak heat pump

    by mdman
    Replies
    14
    Views
    1,426

    As long as TXV retrofit on a heat pump is a...

    As long as TXV retrofit on a heat pump is a bi-flow or a non-bi-blow with a check valve placed around it to permit fee flow in heating mode. Also, you will need to toss the OEM start device (PTCR)...
  49. Thread: weak heat pump

    by mdman
    Replies
    14
    Views
    1,426

    really great advice

    weak capacitor?

    Your giving this guy some really great advice dude.

    Since your guessing, why do you tell him how you would check the cap? Tell him how a RC will present the numbers he's...
  50. Thread: weak heat pump

    by mdman
    Replies
    14
    Views
    1,426

    over charged and under-metered

    26F EST (50 psig), SH 50+
    Crap tube metering a.k.a fixed metered
    124 - 128F CST (275-290 psig)

    Today in Georgia I'm cooling 1900 sq ft with 2.5 tons from a fixed metered (not for long) 13 years...
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