Search Results - HVAC-Talk: Heating, Air & Refrigeration Discussion

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  1. On a capacitor start motor the main purpose of...

    On a capacitor start motor the main purpose of the run cap is to limit the amount of current the start winding draws.

    Are there techs who actually believe that? May be good to hose a HO with BS,...
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    Since NC is not in an earthquake zone, maybe,...

    Since NC is not in an earthquake zone, maybe, with caveats as already mentioned.

    Out here on west coast and earthquake country, the only valid use for sharkbite or similar is temporary fix (very...
  3. Built a couple of houses while employed full...

    Built a couple of houses while employed full time, and installed HVAC in a few other houses while full-time employed.

    ONLY worked as I was not on any specific completion schedule (own $$ and land...
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    Up here in the 2 week summer climate, only ran...

    Up here in the 2 week summer climate, only ran the rheem about 10 hours in 10 years in AC mode, so only went for HP operation.

    UR right about practical limit and decreasing gains, never can get...
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    Max COP from HP

    Home HPO, replaced failed 4T scroll in 4T Rheem package unit with 2T scroll.
    TXV, R22, air-air, set fan at 1150 CFM (lowest speed) with existing ducting.
    Evap fan still at full speed.
    House...
  6. I tore down a Copeland scroll compressor that had...

    I tore down a Copeland scroll compressor that had the same symptoms. Think I posted some pic in a different thread earlier this year.

    Anyway, there were 3 screws that held the lower bearing into...
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    I run pressure at max tire rating on all my...

    I run pressure at max tire rating on all my vehicles, but then watch the tread wear and reduce if the tread wears faster on the crown.
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    engineers... now boys, i R 1.. and so, when...

    engineers...

    now boys, i R 1.. and so, when my 4T HP comp failed, replaced it with 2T comp and overcharged system, heh, heh.

    however, the one that does always gets me is folks turning the...
  9. Thread: DW plumbing

    by junkhound
    Replies
    8
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    450

    I have a '92 Voyager, Plymouth that is, still has...

    I have a '92 Voyager, Plymouth that is, still has it's R12 charge too.

    It will blow cold air on a cold day as the AC comes on when in front windshield defrost mode to 'dry the air'.
    It should...
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    $100 mo basis stated in previous paragraph. ...

    $100 mo basis stated in previous paragraph.

    $100*.942 = $94.20; 100 - 94.20 = $5.80
  11. Thread: newton, 410a

    by junkhound
    Replies
    14
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    1,038

    'outdoor unit going out on high pressure the...

    'outdoor unit going out on high pressure the first few attempts on starting'

    Happened to me once like that, thought it was oil or something also; but, simple fix.

    I'd forgotten to open the...
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    pressure test the system and let it sit for a...

    pressure test the system and let it sit for a good amount of time

    Did not see it mentioned so maybe good to mention that if you let a pressurized system sit for a few hours be sure to not assume a...
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    A little punctuation and insertion of the correct...

    A little punctuation and insertion of the correct proper nouns could be helpful, eh?
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    634

    Pop had a gravity powered ultra quiet...

    Pop had a gravity powered ultra quiet dehumidifier back in the 1950's, think the brand was Lido, or whatever mom had that had a run.

    Fill with CaCl2 and hang over the basement drain. Zero noise...
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    1,220

    Example, ratio the number for whatever your power...

    Example, ratio the number for whatever your power rate and unit dealer cost/w markup are:

    This is very simplistic, but most consumers hould be able to follow it for an upgrade, assuming your...
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    1,773

    ..... Advancement ..... small town (14,000) ...

    ..... Advancement ..... small town (14,000)

    Somewhat of an oxymoron, is it not? Is the town even big enough to support 2 hvac firms? Could you start out on your own - ask the poco if they put...
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    3,445

    There is the problem, you are getting such a...

    There is the problem, you are getting such a heavy oxide coat on the copper even the phosphorous in the silphos wont dissolve it.

    You want just enough N2 flow to displace air, blow some N2 thru...
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    Update: I sent the photos to Emerson, and...

    Update:

    I sent the photos to Emerson, and received replies.
    Emerson has tested the compressors with the screws purposly omitted and did not have subsequent failures (they did not say how long...
  19. I have needed 33F thermostats for heating strips...

    I have needed 33F thermostats for heating strips on plumbing heat tapes
    method? - simply take the thermostats you now have, if 30 YO not likely to be digital, and readjust the internal...
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    switch wires for rub thru to copper OP likely...

    switch wires for rub thru to copper

    OP likely just moved some wires around when he replaced the xfmr and opened the intermittent short, joebear said it right to OP, go check all your wires -...
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    561

    whats 2 more pounds under the hood my...

    whats 2 more pounds under the hood

    my sentiments exactly - never have understood why propane (R290) use in outlawed in US, esp in cars that have propane fuel.
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    'new' flammable european refrigerant

    article in wall st journal today about France not allowing sales of mercedes in France as mercedes has 134A refrigerant, which europe has banned.

    The article never identified the 'new'...
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    I'm surprised they didn't just weld everything...

    I'm surprised they didn't just weld everything together.

    The lower bearing is one piece of what appears to be a machined 356 alloy aluminum casting - the 3 ears are aluminum, and not aware of any...
  24. Forgot to torque screws or left off loctite??

    Full thread in the tech-tech folder.

    Interesting failure mode, had wondered what was wrong with the system, turned out to be an inherent defect in the scroll compressor.

    Finally got around to...
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    418311418321418331418341 Finally got around to...

    418311418321418331418341

    Finally got around to cutting the bottom off the compressor to look at the bottom bearing. Bearing itself good, bu--

    Mystery solved - DEFECTIVE copeland assembly,...
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