Search:

Type: Posts; User: hvacrmedic

Page 1 of 20 1 2 3 4

Search: Search took 0.12 seconds.

  1. Replies
    186
    Views
    5,361

    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.
  2. Replies
    27
    Views
    890

    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...
  3. Replies
    27
    Views
    890

    I've only ran across one rusted through drier in...

    I've only ran across one rusted through drier in the 30 years I've been doing this, and if I'm not mistaken that was only because it was completely buried in sand for 20 or 30 years and 10 feet from...
  4. http://hvac-talk.com/vbb/image.php?u=5587&dateline...

    http://hvac-talk.com/vbb/image.php?u=5587&dateline=1192655164&type=thumb
    Excuse me, did you say something?
  5. Replies
    186
    Views
    5,361

    So how many of you don't adjust blower speed...

    So how many of you don't adjust blower speed after major changes to the air circuit have been made? What happens to motor amps and static pressure when you increase the rpm to maintain the initial or...
  6. Replies
    29
    Views
    927

    If they're really bad I take them to the car wash.

    If they're really bad I take them to the car wash.
  7. Replies
    186
    Views
    5,361

    There are some energy costs. The blower requires...

    There are some energy costs. The blower requires more power to overcome the added air stream restriction. The lower coil temp also reduces the ac system efficiency.
  8. Replies
    14
    Views
    915

    It came with a calibration certificate from...

    It came with a calibration certificate from Transact. After reading the specifics of the calibration procedure I understood that it was calibrated correctly. The calibration sheet gives offsets which...
  9. Replies
    14
    Views
    915

    The dot matrix display is horrible. When the...

    The dot matrix display is horrible. When the value is changing you can't read the last digit or two or three. It also washes out at an angle. The meter itself was disappointing because the only time...
  10. Replies
    186
    Views
    5,361

    Worked it out on the chart. Yes, that works very...

    Worked it out on the chart. Yes, that works very well! Got it, thanks. I learned something new today.
  11. Replies
    186
    Views
    5,361

    It's about time! ;) I wouldn't have expected...

    It's about time! ;)

    I wouldn't have expected that much improvement by doing that. Very interesting.
  12. Replies
    186
    Views
    5,361

    Ok, I figured that in, and only got SHR of the...

    Ok, I figured that in, and only got SHR of the coil up to 0.39. Apparently we need another 5 or so of reheat (don't quote me on that number) from somewhere. Why don't you buy one of those...
  13. Replies
    186
    Views
    5,361

    That's worth nearly 1.5 of reheat at circa 400...

    That's worth nearly 1.5 of reheat at circa 400 SCFM. Given that the deltaT is only 10 that's actually quite significant.
  14. Replies
    186
    Views
    5,361

    The reason isn't difficult to discover. How many...

    The reason isn't difficult to discover. How many people keep their house at 80 and 60% RH? If the SST is running at close to or even below freezing under these conditions, what SST will it be...
  15. Replies
    186
    Views
    5,361

    Doesn't matter. At lower coil temps the SHR...

    Doesn't matter. At lower coil temps the SHR starts to go back up rather than down. The sensible capacity increases by a higher factor than the total capacity. The frost itself poses yet another...
  16. Replies
    186
    Views
    5,361

    When I plug the given data into my psychrometric...

    When I plug the given data into my psychrometric spreadsheet the unkown values magically appear, which is what it was designed to do. ;) Well there's a little more to it than that, I sometimes have...
  17. Replies
    186
    Views
    5,361

    How so? It's an invalid process. The process line...

    How so? It's an invalid process. The process line doesn't intersect the saturation curve. How did any condensation take place if none of the air dropped to its dewpoint? The leaving air condition...
  18. Replies
    186
    Views
    5,361

    There will be some small error due to the gasses...

    There will be some small error due to the gasses not being perfectly ideal, but nothing as great as what you've been led to believe. The thing about the process line being in reality a curve is...
  19. Replies
    186
    Views
    5,361

    That appears to be an invalid psychrometric...

    That appears to be an invalid psychrometric process.
  20. Replies
    26
    Views
    944

    Garden spider ...

    Garden spider
    ...
  21. Replies
    29
    Views
    927

    A dirty coil can cause this. The trap may also be...

    A dirty coil can cause this. The trap may also be inadequate.

    510391
  22. Replies
    33
    Views
    1,099

    Cleaning may cure it, but it could also be due to...

    Cleaning may cure it, but it could also be due to leaks in the coil. Oil from the system contaminates the fins and the water falls off. A quick scan with an electronic leak detector might save you...
  23. Replies
    17
    Views
    677

    The inrush current is reduced. Several...

    The inrush current is reduced. Several manufacturers make soft starters, and they're just speed controllers. They ramp up the motor.

    This article covers the technical aspects.
    ...
  24. Replies
    186
    Views
    5,361

    Theo, here's another way to say what I did above....

    Theo, here's another way to say what I did above. Suppose the system is initially dumping 1 gallon of water per cycle. It's running twice each hour, for 15 minutes each time. 50% load. The...
  25. Replies
    186
    Views
    5,361

    I don't believe that I insinuated anything, I...

    I don't believe that I insinuated anything, I stated outright that the starved coil, if bottom fed, will dehumidify better. :)

    Again, like PHM you're looking at size of the stream of water leaving...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event