Search:

Type: Posts; User: hvacrmedic

Page 1 of 20 1 2 3 4

Search: Search took 0.07 seconds.

  1. Replies
    5
    Views
    176

    I've always said cilantro tastes like ****. Now I...

    I've always said cilantro tastes like ****. Now I know why.
  2. I don't know what the odds are but I've had it...

    I don't know what the odds are but I've had it happen twice while I was at the unit. It's a very unnerving experience. Both were tripping the breaker occasionally, so it's pretty obvious what...
  3. Humidy levels indoors will always be affected by...

    Humidy levels indoors will always be affected by humidity levels outdoors unless the structure is air tight like a foamed house. Your structure is obviously not air tight and is likely quite the...
  4. True, it rarely does the trick. In some cases it...

    True, it rarely does the trick. In some cases it can even make it worse.
  5. It's called "Quiet Shift" by Carrier. Here's the...

    It's called "Quiet Shift" by Carrier. Here's the sequence of operation.

    "Quiet Shift is a field-selectable defrost mode, which will eliminate occasional noise that could be heard at the start of...
  6. Replies
    27
    Views
    986

    Indeed. I snapped a couple of pics today showing...

    Indeed. I snapped a couple of pics today showing what happens with a low charge. I'll switch to the iPhone and post them to this reply. I posted the results with a full charge in the other thread.
    ...
  7. Replies
    27
    Views
    986

    That's just the way it is. If you start with...

    That's just the way it is. If you start with normal Sub cooling then artificially raise the head pressure the sub cooling goes up
  8. Replies
    27
    Views
    986

    No that's perfectly normal

    No that's perfectly normal
  9. Replies
    27
    Views
    986

    I believe it's due to the vacuum underneath...

    I believe it's due to the vacuum underneath pulling air back downward around the circumference of the blade, steering the air stream toward the horizontal direction. In some cases air will actually...
  10. Replies
    61
    Views
    2,072

    Sounds like a couple of people need some new...

    Sounds like a couple of people need some new vacuum pumps and maybe some micron gauges. Seriously.
  11. Replies
    27
    Views
    986

    9LB is correct for that unit.

    9LB is correct for that unit.
  12. Replies
    27
    Views
    986

    The condenser isn't giving up heat quick enough....

    The condenser isn't giving up heat quick enough. Make sure the fan is running up to speed, check the capacitor, bearings, and amp draw. Measure the condenser air temp rise. 4000 cfm cond fan, 1100...
  13. Replies
    61
    Views
    2,072

    How do you get the remaining alcohol out? Vacuum...

    How do you get the remaining alcohol out? Vacuum pump? What does that do for the pump oil? For the pump? Why not just blow the water out with the nitro, then use a vacuum pump to get the rest out?...
  14. Replies
    61
    Views
    2,072

    All day and part of the next IIRC. Finally got it...

    All day and part of the next IIRC. Finally got it down to 500 microns, installed an oversized filter drier and juiced it up.
  15. Replies
    61
    Views
    2,072

    A deep vacuum will definitely move water. I...

    A deep vacuum will definitely move water. I pulled gallons of water out of a system once with just my pump. Several oil changes were involved.
  16. Replies
    61
    Views
    2,072

    Carrier still publishes their triple evac method...

    Carrier still publishes their triple evac method in the current literature, breaking the vacuum with nitrogen rather than refrigerant, as per EPA restrictions. Except for that it's unchanged. It is...
  17. Replies
    61
    Views
    2,072

    It doesn't even have to be dry gas. When a gas at...

    It doesn't even have to be dry gas. When a gas at 100%/RH and 1000psig (there may even be liquid water sitting in the tank) is released into a container at 2psig the RH instantly drops to...
  18. Replies
    2
    Views
    192

    You shouldn't have a "hot" line. "Warm" is OK,...

    You shouldn't have a "hot" line. "Warm" is OK, "hot" is not OK. Probably needs a good seasonal service performed on it.
  19. Replies
    61
    Views
    2,072

    He he! I only meant that the word absorption...

    He he! I only meant that the word absorption doesn't imply any electromagnetic attraction, and just because there is no attraction this does not mean there is no absorption.Technically It's the space...
  20. Replies
    61
    Views
    2,072

    It's somewhere between. The definition of absorb...

    It's somewhere between. The definition of absorb does fit, because the water vapor diffuses into the nitrogen charge when you let it sit for a long enough period of time. Purging speeds up the...
  21. Replies
    61
    Views
    2,072

    If it isn't getting under 5000 it's a leak.

    If it isn't getting under 5000 it's a leak.
  22. Replies
    27
    Views
    1,040

    What about them?

    What about them?
  23. Replies
    8
    Views
    314

    It isn't actually a screw, its' the hub with a...

    It isn't actually a screw, its' the hub with a screw driver slot in it.
    http://blog.uscooler.com/wp-content/uploads/calibrate-thermometer.jpg
    Most are adjusted this way.
  24. Replies
    8
    Views
    314

    Is there a slot for a flat-head screw driver in...

    Is there a slot for a flat-head screw driver in the center of the dial? That's where you calibrate it. Pop off the lens, hold the needle and turn the screw.
  25. Replies
    1
    Views
    240

    We generally use the PT chart for this. Ammonia...

    We generally use the PT chart for this. Ammonia is refrigerant 717.
    ...
  26. Replies
    44
    Views
    1,272

    At a given cfm the deltaH will be proportional to...

    At a given cfm the deltaH will be proportional to the actual cooling capacity at that moment. The cooling capacity rises with increased evaporator load and with a drop in condenser entering air temp....
  27. Replies
    44
    Views
    1,272

    Sorry, the airflow will greatly affect the deltaH...

    Sorry, the airflow will greatly affect the deltaH as well, I misspoke on that part. It's been awhile since I've done these calcs, and it's past my bedtime. The main thing I was trying to convey is...
  28. Replies
    16
    Views
    814

    I agree, better data is in order. Some of his...

    I agree, better data is in order. Some of his numbers are even contradictory. A 50psig SP and 37° SL doesn't provide 7° SH, more like 11°SH. Regardless of the actual temp drop and SH, the fact that...
  29. Replies
    44
    Views
    1,272

    That depends upon your definition of perfect. In...

    That depends upon your definition of perfect. In the real world system capacity varies considerably over the normal indoor/outdoor range of conditions, while the cfm may remain relatively constant....
  30. Too much refrigerant.

    Too much refrigerant.
  31. Replies
    16
    Views
    814

    If your readings are accurate, then you do have a...

    If your readings are accurate, then you do have a suction line restriction.
  32. Or you could buy a sludge sucker. ...

    Or you could buy a sludge sucker.

    http://ecx.images-amazon.com/images/I/31ww57-8o0L._SY300_.jpg
  33. *

    *
  34. Replies
    7
    Views
    648

    Can't go wrong with the 510 IMO. I've had one for...

    Can't go wrong with the 510 IMO. I've had one for several years now, still works great, still accurate. I use it a lot. Magnet is a little weak, but not a deal breaker.
  35. Replies
    12
    Views
    504

    The problem is most likely the disconnect itself....

    The problem is most likely the disconnect itself. Call an electrician instead, maybe he'll know how to properly diagnose it.
  36. If you don't know what the TESP should be, then...

    If you don't know what the TESP should be, then what will you do with the info? You've already calculated the TESP in your first post. Another measurement will either be redundant, or else...
  37. Don't over-think it. Download the installation...

    Don't over-think it. Download the installation manual for your furnace. Read the section on adjusting airflow. Likely it will instruct the installer to adjust airflow up or down in order to achieve a...
  38. Replies
    11
    Views
    924

    They either break, are innacurate, or get lost. I...

    They either break, are innacurate, or get lost. I gave up on them a few years ago. The Cooper blue box is harder to lose track of, does the same job, and is more accurate. I use it for probably over...
  39. Ohm's Law at work. P = I^2 x R. Get the R...

    Ohm's Law at work. P = I^2 x R.

    Get the R (resistance across the connnection) down to 0 ohms and the P (power dissipated/heat) will also drop to 0.
  40. Replies
    21
    Views
    1,953

    He was testing the popper, not the transformer.

    He was testing the popper, not the transformer.
  41. Replies
    65
    Views
    10,903

    IMO you're selling the wrong one.

    IMO you're selling the wrong one.
  42. Replies
    21
    Views
    1,953

    First, if your intent was to test it, then you...

    First, if your intent was to test it, then you wired it exactly right. The purpose of the popper is to open up in case of a short or overcurrent situation. If there is a dead short in a system that...
  43. The meter lead resistance has to be subtracted...

    The meter lead resistance has to be subtracted out. When you subtract that resistance out the winding reisistance should add up to within a tenth of an ohm. Short the leads together in the ohms...
  44. Replies
    687
    Views
    53,299

    I think the idea was that you could strap your...

    I think the idea was that you could strap your accessories to it with those slots.
  45. Replies
    78
    Views
    5,488

    I made several suggestions back when it was...

    I made several suggestions back when it was relatively new. He has really improved it over the last few years to the point that it's marketable IMO.
  46. Replies
    78
    Views
    5,488

    *

    *
  47. Replies
    78
    Views
    5,488

    9 or 10 seer CTD range is 15-25°. Where did you...

    9 or 10 seer CTD range is 15-25°. Where did you get this data?
  48. Replies
    30
    Views
    2,228

    Atmospheric pressure isn't the issue. The primary...

    Atmospheric pressure isn't the issue. The primary reason that charging in the rain can be problematic is that the condenser coil will likely be running wet, which will have a large effect on system...
  49. Replies
    186
    Views
    11,345

    There's little difference when TESP on high speed...

    There's little difference when TESP on high speed is over 1". At normal static pressures there's a significant difference in cfm between speeds.
  50. Replies
    27
    Views
    1,965

    And if it's a heat pump the only argument is...

    And if it's a heat pump the only argument is exposure to the elements. The entire condenser is out there though, sooo.... If I saw a lot of problems with driers installed outdoors I'd probably...
Results 1 to 50 of 1000
Page 1 of 20 1 2 3 4

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.
Quality Home Comfort Awards