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  1. Replies
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    Walk in cooler - operation

    Can someone point me to an explanation of the sequence of operation for a walk in cooler? It's for a project at school and the instructor refuses to explain the simple operation of the unit (even tho...
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    651

    I kinda resonate with the first two replies,...

    I kinda resonate with the first two replies, because i like math. Visualizing cylinder motion, volume and outcome is a bit tough...
    Hvacmedic is kinda saying the opposite of Ref Johnny...

    This...
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    651

    Compression ratio

    Can someone help me understand this?

    As suction pressure decreases...compression ratio goes up.

    I simply can't see how less gas at suction equals a higher ratio and more heat at discharge?
    ...
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    This is the Ask Our Pro's forum. In order to post...

    This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread....
  5. That happened to me not too long ago on a 410a...

    That happened to me not too long ago on a 410a RTU. Burnt my hand getting it to shut...
    Pissed me right off. Was a harsh reminder to wear gloves!
  6. Thread: No superheat

    by desol
    Replies
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    1,609

    That's what i ended up pinpointing...inadequate...

    That's what i ended up pinpointing...inadequate air. I made a recommendation to install a multi-speed blower for his old, small furnace.
    He said, he doubts it'll happen. lol. It's been working fine...
  7. Thread: No superheat

    by desol
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    1,609

    Wow. That chart and diagnosis was great. Thanks!...

    Wow. That chart and diagnosis was great. Thanks!
    I think it was 13 seer...not totally sure. 6-8 year old unit.
  8. Thread: No superheat

    by desol
    Replies
    20
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    1,609

    Not sure what it was...i have a hygrometer on...

    Not sure what it was...i have a hygrometer on order.
  9. Thread: No superheat

    by desol
    Replies
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    1,609

    Good advice. Thanks!

    Good advice. Thanks!
  10. Thread: Injecting dye

    by desol
    Replies
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    2,357

    No doubt... :)

    No doubt... :)
  11. Thread: Injecting dye

    by desol
    Replies
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    2,357

    True enough...but I've seen guys spend hours with...

    True enough...but I've seen guys spend hours with leak detectors and still find nothing. I HAVE however, had great luck with soap at obvious locations.
    I suppose i should break down and get one....
  12. Thread: No superheat

    by desol
    Replies
    20
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    1,609

    No superheat

    So, I've gotten a few of these lately.

    R22 systems, low outdoor ambient (64 degrees F)...hi side 155 psi, low side 62 psi, saturated suction temp 34-35F, suction line temp 35F (zero superheat)......
  13. Thread: Injecting dye

    by desol
    Replies
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    2,357

    They've had the unit for quite a while(3-4...

    They've had the unit for quite a while(3-4 years)...it stopped cooling last fall.
  14. Thread: Injecting dye

    by desol
    Replies
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    2,357

    Actually, i did tell the owner that originally. I...

    Actually, i did tell the owner that originally. I still wanna check back tho. I'd rather catch the leak early (hopefully)...
  15. Thread: Injecting dye

    by desol
    Replies
    34
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    2,357

    I did spray/soap around the terminal plug on the...

    I did spray/soap around the terminal plug on the compressor. Checked the schrader cores and service valves/caps. I also tightened a few of the fittings at the TXV.
    Didn't notice any oil stains. I...
  16. Thread: Injecting dye

    by desol
    Replies
    34
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    2,357

    Soap has always worked pretty good for me. This...

    Soap has always worked pretty good for me. This is my first time using dye. Electronic is good too...
    It's good to have 2 or 3 different leak detection tools handy.
  17. Thread: Injecting dye

    by desol
    Replies
    34
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    2,357

    No worries...no confusion. I think it was the...

    No worries...no confusion.

    I think it was the Spectronics dye. Bright yellow...and stains like no tomorrow.
  18. Thread: Injecting dye

    by desol
    Replies
    34
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    2,357

    Hi Doug. Is there any particular reason why you...

    Hi Doug. Is there any particular reason why you would do it in that order?

    The unit was fairly new....compressor was scroll. I was able to pull down(not hold) to 350 microns...which tells me the...
  19. Thread: Injecting dye

    by desol
    Replies
    34
    Views
    2,357

    Injecting dye

    Hey guys. Wondering...i'm working on a split residential unit that had lost all it's gas. I leak checked it for quite a long time at 200 psi of nitrogen and soap. Couldn't find the leak. Left it...
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    I'd check the flame sensor(or pilot ground),...

    I'd check the flame sensor(or pilot ground), blower leakage to the burner compartment and ignition module.....etc.
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    No one knows the difference? ...or has any input??

    No one knows the difference? ...or has any input??
  22. Replies
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    275

    Honeywell Aquastats

    Anybody know if there's a major difference between the surface mount vs immersion type bulbs? l6006c is surface mount.

    I took an immersion type bulb and strapped it to a pipe unaware that I was...
  23. Thread: Vacuum/Charging

    by desol
    Replies
    12
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    1,379

    In order for me to be comfortable with...

    In order for me to be comfortable with understanding a concept, i need to know the deeper sides the story. ...so, there is only de facto "liquid"(that kind that can damage the unit) in the last half...
  24. Thread: Vacuum/Charging

    by desol
    Replies
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    1,379

    Yes, there is....i just thought i'd ask here as...

    Yes, there is....i just thought i'd ask here as well...for good measure and not to look like a retard.
  25. Thread: Vacuum/Charging

    by desol
    Replies
    12
    Views
    1,379

    Thanks guys. Disaster averted. So, as i charge...

    Thanks guys. Disaster averted.

    So, as i charge vapour into the low side(without the unit running) where will the charge migrate to...the evaporator? ...some into the low side of the compressor? I...
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