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  1. Thread: R410a system

    by penderway
    Replies
    33
    Views
    1,798

    Both Rheem and Goodman assume 50% relative...

    Both Rheem and Goodman assume 50% relative humidity for their superheat charts.

    Practically useless for my standards.

    It's better than guessing if that's all you got.
  2. ASHRAE Standard 62.1-2010...

    ASHRAE Standard 62.1-2010 see Table 6 for minimum fresh air rates
  3. ASHRAE 602 or something close I think, Have you...

    ASHRAE 602 or something close I think, Have you tried a google search? I know it's available because I've read it (or some of it).
  4. Replies
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    222

    2012 ASHRAE Handbook- HVAC Systems and Equipment,...

    2012 ASHRAE Handbook- HVAC Systems and Equipment, Chapter 23 - Air-Cooling and Dehumidifying Coils

    http://www.techstreet.com/ashrae/products/1833349
  5. Replies
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    784

    I do respect my fellow tradesmen and homeowners...

    I do respect my fellow tradesmen and homeowners who DIY as well. But to assume that we could tell you what pressures you should see and that be the criteria for the basis of whether it's a job well...
  6. Replies
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    1,055

    X2 Definition of terms is one of the very few...

    X2

    Definition of terms is one of the very few things one must know for epa certification.


    The G5 is great, the push pull method is great, but even the weakest recovery machine will do an...
  7. Replies
    18
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    784

    Best of luck to you, but in lieu of hiring a...

    Best of luck to you, but in lieu of hiring a professional, you won't have much luck getting one to work for you free and online.
  8. Replies
    12
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    561

    A very common question. The answer is Yes if...

    A very common question. The answer is Yes if equipment is sized and selected correctly, you will be comfortable.

    Keep in mind that you don't get -20 for several days in a row, but rather -20 for...
  9. Replies
    84
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    4,361

    You both make good points, all is well with me.

    You both make good points, all is well with me.
  10. Replies
    84
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    4,361

    There is no shame in being misinformed SB, I bet...

    There is no shame in being misinformed SB, I bet you're right about no one going to jail, but early on it was newsworthy when someone got fined.
    ...
  11. Replies
    84
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    4,361

    Hairdresser's here in the US are held to similar...

    Hairdresser's here in the US are held to similar strict requirements, but of course as far as consumers are concerned, haircuts are more important than heat pumps.
  12. Replies
    84
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    4,361

    At minimum It certifies that you understand the...

    At minimum It certifies that you understand the laws pertaining to handling refrigerants. At it's most, it certifies that you understand how recovering said refrigerants could freeze the water tubes...
  13. Replies
    84
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    4,361

    A stinkin' epa certification is the only...

    A stinkin' epa certification is the only requirement one needs to be an HVAC Technician. It sure does piss me off when someone who is supposed to be my peer can't even get that right. :gah:
  14. Replies
    84
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    4,361

    I would guess that the company you work for would...

    I would guess that the company you work for would not like to be part of any federal violations nor would they condone what you describe. If they do, you may not be a good fit there anyway.

    I'm...
  15. Thread: New record

    by penderway
    Replies
    29
    Views
    1,386

    I often show the customer the readings on the old...

    I often show the customer the readings on the old and new capacitor. I figure if my meter is way out it would show out of the box caps as weak also, it doesn't.

    Funny you mention Packard, until...
  16. Thread: New record

    by penderway
    Replies
    29
    Views
    1,386

    I understand now, if the motor manufacturer only...

    I understand now, if the motor manufacturer only specifies 10% tolerance, then if a capacitor is out of it's own spec you guys leave it in because it still meets the motors spec.

    The problem I...
  17. Replies
    28
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    1,155

    Shoot! Wrong guess = Wrong diagnosis! Here's...

    Shoot! Wrong guess = Wrong diagnosis!

    Here's what I get with those conditions on a 10 SEER...

    LOW EVAPORATOR HEAT ABSORPTION - blower speed too low ~ improper supply and/or return plenum...
  18. Thread: New record

    by penderway
    Replies
    29
    Views
    1,386

    X2 The specs are the specs. If the cap is at...

    X2

    The specs are the specs. If the cap is at or close to tolerance I make sure I test under load.

    Beenthere, If the tolerance is of the original capacitor is 10%, I use 10% as the tolerance....
  19. Replies
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    1,155

    A low refrigerant charge along with...

    A low refrigerant charge along with non-condensables (causing a false subcooling) can have those conditions.

    I'm guessing it's a 13 SEER?
  20. Replies
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    1,514

    If possible use high/low wall grilles to transfer...

    If possible use high/low wall grilles to transfer from bedroom to closet first and then to common area where your return is. This will significantly reduce the transfer of light and sound and help...
  21. Replies
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    3,395

    Saying what exactly?

    Saying what exactly?
  22. Replies
    45
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    3,395

    I knew that asbestos fibers were so small they...

    I knew that asbestos fibers were so small they couldn't be evacuated normally from your lungs ,but fiberglass is so much bigger and comes out with the rest of the airborne particles and fibers we...
  23. Replies
    45
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    3,395

    Who proved that, and when?

    Who proved that, and when?
  24. Replies
    12
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    561

    It's not recommended to use the worst case...

    It's not recommended to use the worst case weather conditions. The default value of 8 should be used if it's based on bin data (check with the developer to be sure)
  25. Certainly wouldn't want to lower head pressure to...

    Certainly wouldn't want to lower head pressure to a point where it could cause problems, but i don't think there is any chance of that if the water is 55 or higher and the indoor load is normal....
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