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Type: Posts; User: Red Man

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  1. Replies
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    I’ve done a bit of work on them. Most of them are...

    I’ve done a bit of work on them. Most of them are small and not very serviceable. I’ve worked on a big one a few times on a machine that extracts nitrogen from the air for use at an oil refinery.
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    No I said widen the on/off settings, as in make...

    No I said widen the on/off settings, as in make them farther apart from each other.
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    I set them so the fan kicks on at 110 degree...

    I set them so the fan kicks on at 110 degree condensing temp and kicks off at 100 psi over typical evap saturation temp.
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    No but it will reduce the frequency that it...

    No but it will reduce the frequency that it happens.
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    You’re overthinking it. I believe Bbeerme was...

    You’re overthinking it. I believe Bbeerme was saying some of the freons sacrifice themselves to cool the rest down, that’s just the way he thinks about it when he’s being one with the freons. Then...
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    By widening the on/off settings for the condenser...

    By widening the on/off settings for the condenser fan.
  7. Replies
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    Well there would have to be, otherwise the...

    Well there would have to be, otherwise the receiver would be full of liquid right? :angel: :couchhide:
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    What makes sense to you is correct, when in doubt...

    What makes sense to you is correct, when in doubt trust icemeister!
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    :gah: It’s because the flash gas cooled the...

    :gah:

    It’s because the flash gas cooled the rest of the refrigerant down to the evap saturation temp, so at that point no more refrigerant will boil off until it finds another heat source, ideally...
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    You said flash gas is not the refrigerant cooling...

    You said flash gas is not the refrigerant cooling itself.
  11. Replies
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    Timebuilder, you know it takes a lot of heat to...

    Timebuilder, you know it takes a lot of heat to boil refrigerant. You keep mentioning this is how the whole process works, by boiling refrigerant in the evaporator which obviously is completely...
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    Theoretically flash gas is not a necessity. If...

    Theoretically flash gas is not a necessity. If the liquid entering the metering device was at or below the evap saturation temp, there would be no flash gas.
  13. Replies
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    Both the pressure drop and the flash gas are the...

    Both the pressure drop and the flash gas are the source of the refrigerant cooling. The pressure drop causes the flash gas, the flash gas absorbs heat from the refrigerant causing the remaining...
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    Sounds like you got it to me.

    Sounds like you got it to me.
  15. Replies
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    Maybe this explanation will help. We have liquid...

    Maybe this explanation will help. We have liquid flowing to the metering device. This liquid is stable because the temperature surrounding it is 20 degrees or so below the refrigerants saturation...
  16. Are you sure it’s R22? Maybe someone either...

    Are you sure it’s R22? Maybe someone either topped off or replaced with a retrofit refrigerant.
  17. Replies
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    Looks great!

    Looks great!
  18. Thread: Wire too hot

    by Red Man
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    1,126

    He posted the nameplate in post #1. You need to...

    He posted the nameplate in post #1. You need to turn your head sideways to read it though. :gah:
  19. Replies
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    That is some seriously impressive insulation work!

    That is some seriously impressive insulation work!
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    410A has almost no glide. I wouldn’t worry at all...

    410A has almost no glide. I wouldn’t worry at all about pumping it down or topping it off.

    Scrolls pump down just fine, they are common on pump down refrigeration systems. Sometimes they rattle a...
  21. Thread: 404A

    by Red Man
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    The glide on 404A is very low. I don’t even think...

    The glide on 404A is very low. I don’t even think twice about topping it off.
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    Nope, no solution...the dispatcher still sucks.

    Nope, no solution...the dispatcher still sucks.
  23. Thread: Strange

    by Red Man
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    ...Under boobs :yes::yes:

    ...Under boobs :yes::yes:
  24. Thread: Strange

    by Red Man
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    Might be broke.

    Might be broke.
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    I work on ammonia systems. All are large systems,...

    I work on ammonia systems. All are large systems, mostly food processing plants.
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    The type with a coalescer element and the type...

    The type with a coalescer element and the type with a float and needle valve will have different methods for determining failure. Both types are are rebuildable.
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    I say go for it. Small refrigeration is my least...

    I say go for it. Small refrigeration is my least favorite kind of work. I much prefer large HVAC and large refrigeration. It is tough working on a huge variety of stuff and being expected, by the...
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    I’m gonna say the frozen coil caused a liquid...

    I’m gonna say the frozen coil caused a liquid slug to take out the compressor. When the compressor isn’t pumping, the evap superheat is a meaningless number.
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    Verify the JCI controllers have power. If they do...

    Verify the JCI controllers have power. If they do have power, you could try power cycling them.
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    The app does not make up for the extras that the...

    The app does not make up for the extras that the micro is missing.
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    I just have the micro, it’s cheaper than the JB...

    I just have the micro, it’s cheaper than the JB gauge. The pro would be nice.
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    Here’s a 5 ton split heat pump I did recently. 15...

    Here’s a 5 ton split heat pump I did recently. 15 minutes to 120 microns. Held below 150 for 10 minutes.
    808695
  33. Thread: Pulsing in TXV

    by Red Man
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    The superheat, subcooling, and air temps are all...

    The superheat, subcooling, and air temps are all needed to tell if the txv is actually the problem or if there’s a liquid restriction or just a low load. The OP found a dirty blower wheel, so the...
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    Yes, it’s very limiting. I highly recommend...

    Yes, it’s very limiting. I highly recommend getting a couple Appion large diameter hoses and core removal tools.
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    I got no problem going on commercial roofs, resi...

    I got no problem going on commercial roofs, resi roofs are different. They’re steeper and it’s a lot scarier getting on and off the ladder.
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    Ammonia subcoolers are typically not fan coils,...

    Ammonia subcoolers are typically not fan coils, they are more like what icemeister posted. It can be done with plate and frame or shell and tube heat exchangers. Is this system going to have an...
  37. Yup, me too :cheers:

    Yup, me too :cheers:
  38. I wouldn’t use that one. That stat can’t go...

    I wouldn’t use that one. That stat can’t go outside and doesn’t have a remote bulb. It could go in the economizer hood, but that would not be ideal. The OP needs a stat with a cap tube and bulb.
  39. You could use a ranco etc, or a mechanical stat...

    You could use a ranco etc, or a mechanical stat with a cap tube and sensing bulb. Find one where your desired set point is somewhere near mid range of the stat. Just run the Y circuit through the...
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    He comes back all the time! He was just here the...

    He comes back all the time! He was just here the other week showing off his all bun burgers he was eating because he had no work to do.
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    Doesn’t seem like the guru to me. Seems like a...

    Doesn’t seem like the guru to me. Seems like a thin skinned rookie. Kinda like the guru before we beat him down so many times.
  42. Thread: Beef jerky

    by Red Man
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    1,564

    Looks great!

    Looks great!
  43. Thread: PM time

    by Red Man
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    ::DD: I’d be too ashamed to post that pic if...

    ::DD:
    I’d be too ashamed to post that pic if that’s what my burgers looked like.
  44. Whattttt...I use my combustion analyzer at least...

    Whattttt...I use my combustion analyzer at least weekly, even during the summer! Well...maybe every other week occasionally.
  45. Thread: PM time

    by Red Man
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    Maybe you should start your own tech support...

    Maybe you should start your own tech support business. Tech support for all types of equipment, just call the hvac guru! $2 per minute and you can just bill the customer for the cost!
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    Poll: I agree. I don’t see the benefit of having four...

    I agree. I don’t see the benefit of having four new forums to cover a subject that seems to come up infrequently. I think it makes sense to lump it into residential appliances.
  47. My universal zebra ecm motor tester.

    My universal zebra ecm motor tester.
  48. Thread: PM time

    by Red Man
    Replies
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    4,160

    You must be really bored.

    You must be really bored.
  49. Replies
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    I have no problem with the magnet strap.

    I have no problem with the magnet strap.
  50. The low discharge temps would be due to the flood...

    The low discharge temps would be due to the flood back you were getting. What were your pressures/temps after the repair?
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