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  1. There's a reason they have a minimum rpm on the...

    There's a reason they have a minimum rpm on the compressors. Going below that minimum will destroy them due to lubrication issues.
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    Goodman and york are still made in USA. York...

    Goodman and york are still made in USA.

    York recently moved back from Mexico and Daikin has put some serious $ into the goodman complex so hopefully they're both sticking around for a while.
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    Thankfully hoshi evaps are priced very fairly. ...

    Thankfully hoshi evaps are priced very fairly. At least the one I have changed were. Compared to other brands that are priced about the same as a new unit
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    808

    It looks like there's dimples in the vertical...

    It looks like there's dimples in the vertical "dividers". If that's the case, the evap is shot.

    Those should be smooth.
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    another thing that will affect the frost amount...

    another thing that will affect the frost amount is the color of the roof. A dark color will absorb more heat during the day and therefore be warmer through the night then a light color.

    another...
  6. Thread: Crane signaling

    by craig1
    Replies
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    1,058

    667481 All I need to know about crane...

    667481

    All I need to know about crane signaling is in this poster. I'll allow her to raise and extend my boom any time. Maybe even use the whip line
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    You can guess based on experience and the calc...

    You can guess based on experience and the calc will show that you're either correct or one size over or under. The price difference between the similar size units is so small that it's insignificant.
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    Next time you see one of those take a close look...

    Next time you see one of those take a close look at how they're constructed. Therese a baffle or two in them so that the solids sink, the grease floats, and the water passes through the middle and...
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    If it ran, I would say there's a good chance you...

    If it ran, I would say there's a good chance you had a turn to turn winding short. This happens when the there's not enough laquor on the windings to lock them together and they are able to vibrate...
  10. On all trues with 4440 compressors I use 36" of...

    On all trues with 4440 compressors I use 36" of .040 (supco BC2) with no heat exchange. I have found this give excellent performance.

    It goes against many of the rules of thumb (too short). But...
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    1,158

    What is the outdoor coil superheat? You say the...

    What is the outdoor coil superheat? You say the outdoor coil is below freezing. Of course it is, it's a heat pump, that's why it has a defrost cycle.
  12. For the little k-bodies I use one of those...

    For the little k-bodies I use one of those reusable red restaurant ketchup bottles. It's little nozzle fits perfectly in the oil hole. And with a piece of rubber tubing it's perfect for sucking...
  13. Hot side is easy to troubleshoot untill you get...

    Hot side is easy to troubleshoot untill you get to the fancy stuff like combi ovens. Hot side stuff is also difinitely harder to repair then refrigeration. All parts pretty much have to be OEM, so...
  14. as long as the lines are not severely oversized...

    as long as the lines are not severely oversized and you don't have a significant suction lift (more than 5 ft) 407c can work fine with mineral oil in high temp (A/C) systems. The high velocity...
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    Magic. That's why they call it a magic pak ...

    Magic. That's why they call it a magic pak

    Those are through-the-wall units. It's basically a mini package unit. The whole thing is stuck in a hole in the wall
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    Seeing two rods snapped on the OPPOSITE end of...

    Seeing two rods snapped on the OPPOSITE end of the crankshaft from the oil pump makes me suspect this comp ran out of oil or had significant oil dilution due to floodback. If the oil pump is not...
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    The wire you are looking for is Type MTW

    The wire you are looking for is Type MTW
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    776

    How was the pitch on the vent piping? If there's...

    How was the pitch on the vent piping? If there's insufficient pitch, water will build up in the piping and then run back when the inducer shuts off.
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    Keep it as is, but go with a 134a compressor and...

    Keep it as is, but go with a 134a compressor and 134 refrigerant. If you a changing a compressor on any system there is no reason to charge with an r-12 replacement blend.
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    http://fireworld.com/Archives/tabid/93/articleType...

    http://fireworld.com/Archives/tabid/93/articleType/ArticleView/articleId/86838/Beware-Decomposing-Refrigerants.aspx
  21. I would guess specifically underground tanks. ...

    I would guess specifically underground tanks. Many houses in my region had underground oil tanks and they became a huge liability. Makes it difficult to sell the house unless you can prove the tank...
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    It's hydroflouric acid. Really nasty stuff,...

    It's hydroflouric acid. Really nasty stuff, don't breath it
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    378

    All outdoor units should have the "hot gas...

    All outdoor units should have the "hot gas bypass" which is technically called a head pressure controller. The big issue is that during the off cycle the pressure in the receiver will eventually...
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    378

    I would also never install a 134 remote system,...

    I would also never install a 134 remote system, but I see a lot of them. A lot of them are r-12 that are running a drop in or 134.
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    A heated and insulated receiver. Alternately...

    A heated and insulated receiver.

    Alternately eliminate the low pressure cut out and tie the thermostat to the contactor in addition to the LLSV.
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    There are two main piston/txv threads you will...

    There are two main piston/txv threads you will see.
    chatlaff- uses a piston with a Teflon ring on it and there is another Teflon ring on the housing
    Aeroquip- uses no Teflon rings. All seals...
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    I had a white Rodgers universal that would just...

    I had a white Rodgers universal that would just shut down after a limit trip. Exchanged it for a new one and it was fine
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    I would. And if it was a burnout, or the...

    I would. And if it was a burnout, or the refrigerant was otherwise un-reusable, I would recharge it with r407c. using POE oil opens you up to a world of great current and upcoming replacement...
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    I never use any flush product. If i have reason...

    I never use any flush product. If i have reason to suspect theres a large amount of old oil in the lines, I'll blow them out with nitrogen. I always reuse the old lines unless they are the wrong...
  30. Thread: O boy

    by craig1
    Replies
    12
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    767

    That might be fine. What does he condenser data...

    That might be fine. What does he condenser data plate say for "min circuit ampacity" and "max over current protection"
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    The return duct is in the bottom usually behind...

    The return duct is in the bottom usually behind the fresh food drawers. It's probably frozen shut
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    http://www.cnn.com/2015/12/31/us/carnival-ecstasy-...

    http://www.cnn.com/2015/12/31/us/carnival-ecstasy-cruise-ship-elevator-death/
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    It does not shut down at -5. The performance...

    It does not shut down at -5. The performance just starts to drop off there. I have a fujitsu multi zone that's rated to +16 and it was working fine at -20
  34. Why would a manufacturer of self contained...

    Why would a manufacturer of self contained products pay a "professional tec person" to answer phones. They just need someone that can walk you through a flow chart.
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    I bought a bunch of the small style capacitors...

    I bought a bunch of the small style capacitors for fixing pumps and inducers off of amazon. They come in handy often
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    All HPCOs were working previously. They were...

    All HPCOs were working previously. They were auto reset and I suspect the condensers were off for days and the systems were cycling on the HPCOs and wore them out. Actually on some of them the...
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    And to top it off it was Labor Day. No supply...

    And to top it off it was Labor Day. No supply houses open so I had to use all the refrigerant I had in stock and then take 5-20 lbs from each of the remaining systems and transfer it into the empty...
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    Works fine untill the contactor welds... Or even...

    Works fine untill the contactor welds... Or even more likely the Johnson controls HPCO fails. I had a market where some pranksters turned off the remote condenser fans and 4 of 16 Johnson high...
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    The motor will be very under loaded in that...

    The motor will be very under loaded in that application and will have high back EMF. Make sure you have a 440v capacitor on it, preferably a high quality one like a turbo 200.

    Also, I would...
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    363

    Yes, the peerless pinnacle is just a rebranded...

    Yes, the peerless pinnacle is just a rebranded munchkin which was HTP. They discontinued the munchkin name after it because synonymous with steaming pile of feces.
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    I'm guessing you're talking about the roll out...

    I'm guessing you're talking about the roll out limit on the burner box. If so, the secondary heat exchanger is probably plugged with rust and soot
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    941

    They seem fine for the most part. Some are more...

    They seem fine for the most part. Some are more sensitive to thermostat voltage drop or power stealing stats then their OEM counterparts.
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    And those who can't teach, inspect.

    And those who can't teach, inspect.
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    2,603

    If you look at any new car there are a few spot...

    If you look at any new car there are a few spot welds between various metal parts. The purpose of these is to hold the car together until the glue dries. Industrial adhesives today are stronger...
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    2,603

    I used it 4 years ago to join a 410a lineset...

    I used it 4 years ago to join a 410a lineset inside a wall where I could feel the pipes but not see them.
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    2,603

    You could always use this ...

    You could always use this

    https://hdsupplysolutions.com/shop/p/hvac-super-pro-p235009

    I had to use this once when I could not braze or solder due to a fire risk. It worked fine.
  47. Replies
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    2,603

    I saw an article that says the new MAP Pro gas...

    I saw an article that says the new MAP Pro gas has 14% less BTUs than MAPP did.
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    948

    He didn't say direct spark, he said direct fired....

    He didn't say direct spark, he said direct fired. Means there's no heat exchanger.
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    I love this app

    I love this app
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    If you look at the address bar, it says...

    If you look at the address bar, it says m.youtube.com. That would be the mobile site for phones. Change it to www.youtube.com and it should be normal
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