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  1. Replies
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    725

    Look at posts 7 8 &9. I think okapi giant was...

    Look at posts 7 8 &9. I think okapi giant was plotting dew point instead of wet bulb

    Thanks Mike
  2. Replies
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    725

    What is the best way to get an accurate DA wet...

    What is the best way to get an accurate DA wet bulb reading?
  3. Replies
    29
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    725

    Off the Munters app on iPhone. It's much faster...

    Off the Munters app on iPhone. It's much faster than plotting on psycometric chart and you can set your altitude.
  4. Replies
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    1,199

    Junior you are getting some poor advice here. ...

    Junior you are getting some poor advice here. Scott, thanks for helping, but you have some misconceptions.


    WRONG, Low SH means too much vapor in evap . It means too much liquid in evap. If...
  5. Replies
    29
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    725

    Thanks for sticking with me. I'm just...

    Thanks for sticking with me. I'm just disappointed more people are not joining in

    Mike
  6. Replies
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    725

    Sorry guys, I disagree. 58.1 Dry Bulb and...

    Sorry guys,

    I disagree. 58.1 Dry Bulb and 54 Wet Bulb B = 77.2 % RH at Sea Level


    58.1 Dry Bulb and 54 Dew Point = 86.19 %

    Respectfully
    Mike
  7. Replies
    3
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    154

    I moved it here in hopes of getting some more...

    I moved it here in hopes of getting some more activity. Should I ask administrator to remove the other one?

    Mike
  8. Thread: DeltaT

    by mikeweber3
    Replies
    7
    Views
    528

    Town, Dry Bulb DeltaT doesn't tell you...

    Town,

    Dry Bulb DeltaT doesn't tell you much. Download the Munters app for your IPhone. Enter the DB & WB of your entering and leaving air under the process mode. If you know your airflow...
  9. Replies
    6
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    348

    Westhills, If you use 2 stage AC with 1...

    Westhills,

    If you use 2 stage AC with 1 speed fan you will get VERY poor dehumidification when in low speed. You could go to the trouble of installing a relay that would shift the blower down...
  10. Replies
    3
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    154

    Low RH of DA on new systems?

    Hello,

    We have recently started using the Munters App for evaluating capacity of air conditioning systems. I have always been taught that the RH of discharge air would run between 90% and 95%.
    ...
  11. Replies
    4
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    337

    Dub, Yes you do need to account for the...

    Dub,

    Yes you do need to account for the diff Pressure of the risers, however these should actually help you not hurt you. I would not attempt anything without confirming what these pressures...
  12. Replies
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    725

    ikapigian, Are you sure you are using Dry...

    ikapigian,

    Are you sure you are using Dry Bulb and Wet Bulb? I do get 86 and 91 if I use Dew Point.

    Thanks for your help.

    Still looking for others to chime in with actual results
  13. Replies
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    725

    Ikapigian, Thanks for responding. In...

    Ikapigian,

    Thanks for responding. In both of your examples the Discharge RH was 78%. I' curious what some others are finding. We are beginning to develop a theory. Both of our examples...
  14. Replies
    29
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    725

    Low RH of DA on new systems?

    Hello,

    We have recently started using the Munters App for evaluating capacity of air conditioning systems. I have always been taught that the RH of discharge air would run between 90% and...
  15. Replies
    9
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    817

    All I never change a start cap without...

    All

    I never change a start cap without changing relay. I figure the relay sticking is the most likely culprit and callbacks are expensive

    Thanks

    Mike
  16. Replies
    4
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    668

    You might check to see if that comp has a liquid...

    You might check to see if that comp has a liquid injection port. If so you could put a 190 valve on it. It's is a small Txv that measures discharge temp and dumps a small amount of liquid into the...
  17. Timebuilder, I agree with everything you...

    Timebuilder,

    I agree with everything you have said, however my point was .................... If you look at the -30 column (or any column for that mater) it shows a differrent BTU capacity...
  18. Replies
    23
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    1,841

    Zuke As I said earlier "Something is wrong if...

    Zuke

    As I said earlier "Something is wrong if u have 35 SH @ comp and that much ice on comp. wrong freon??? Bad gauges? Plugged suct filter?? "

    I'm sure you are on the right track. Most...
  19. Replies
    29
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    7,606

    It's about a 1 hp. Probably runs about 2 hrs/...

    It's about a 1 hp. Probably runs about 2 hrs/ day. It can't possibly cool tank below ambient ground , which in my area is 55.9. If you think about it, all heat I pull out goes back in through the...
  20. Thread: Cap tube

    by mikeweber3
    Replies
    7
    Views
    928

    zuke, 6 degrees superheat should be fine...

    zuke,

    6 degrees superheat should be fine after it is pulled down. If you had 6 with a hot box, you're probably overcharged now. I wouldn't worry about the 95, that's not uncommon in a hot...
  21. Replies
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    7,606

    It's not really about bio heat as much as simple...

    It's not really about bio heat as much as simple sensible. Most of the water down the drain is 75 degrees or higher which can get you over 3.0 COP
  22. Replies
    23
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    1,841

    Where are u measuring duct press? Comp model#. ...

    Where are u measuring duct press? Comp model#. ?
    Enter & leaving air temp at evap?

    Do u know how to test to see what kind of freon?
  23. Replies
    23
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    1,841

    Zuke Something is wrong if u have 35 SH @...

    Zuke

    Something is wrong if u have 35 SH @ comp and that much ice on comp. wrong freon??? Bad gauges? Plugged suct filter??
  24. Replies
    29
    Views
    7,606

    Septic tank heat reclaim

    About 2 years ago I built a new house. It is an all electric house and I'm trying to get the lowest energy footprint possible. I put a coil of 3/4 pex in my septic tank and circulate a closed loop...
  25. licen, This chart makes no sense. No...

    licen,

    This chart makes no sense. No matter what you call it if you have the same evaporating temp then you should have the same suction pressure. If you have the same suct press and same...
  26. Replies
    23
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    1,841

    It is rare, but something that has kicked my but...

    It is rare, but something that has kicked my but a few times is a leak in the liquid to suction heat exchanger. I'm not sure I understand all of your symptoms. Could you re list them? Is your...
  27. Replies
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    2,591

    Golden rule. Always treat everyone as you wish...

    Golden rule. Always treat everyone as you wish to be treated. If they wrong you anyway that's their problem. If you live your life in a way that is pleasing to the LORD, you will blessed.

    I...
  28. Replies
    13
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    1,070

    jets, If it's 3 phase, you could have a...

    jets,

    If it's 3 phase, you could have a contactor single phasing intermittently.

    Mike
  29. Replies
    17
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    1,642

    You can also build a non condensable separator...

    You can also build a non condensable separator into the liquid line. Just tap off the top of the liquid line into a piece of larger tubing (say 1 5/8) 2' long. Put a pressure tap at the top of it....
  30. Bordini, If you would give a few more...

    Bordini,

    If you would give a few more details we would try to help. One that doesn't make sense is the 20 psi suction press with the unit off. How long had it been off? Does it have any...
  31. Replies
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    1,070

    Jets, you could have a condensor fan going...

    Jets,

    you could have a condensor fan going out, causing the comp to pull high amps when you are not there.
    Mike
  32. Replies
    11
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    1,165

    Dodge and Garden.

    FCS
    No, I am not in RSES. I used to be when we had a local chapter here, but it folded about 25 years ago. We never have had ASHRAE.

    Tiger,
    Our business (www.weberorange.com) operates...
  33. Replies
    25
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    7,433

    How many systems?

    Jab,

    I question the wisdom of using one system on a 3 story house. Are you putting in a zoning system?

    Mike
  34. Replies
    10
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    5,183

    Texas hit it

    Mara,

    Texas hit it on the head. We are in South west Kansas where we have almost a perfect match for annual heat removal vs storage, however every job is different. What climate are you...
  35. Replies
    14
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    7,705

    What do you want?

    Mara,

    I am not an engineer, but have designed, serviced, and installed many systems. I have done horizontal, vertical, open loop, closed, cooling tower, liquid cooler, and boiler assisted...
  36. Yes

    Back in the 1980s we used to install a lot of these. Yes, they do slow the air down some, but they gain enough by the lowered entering temp that the net gain is significant. I'd like to give you...
  37. Replies
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    5,788

    Dad a Grocer

    Hi,

    When I was a kid my dad was a small town grocery store owner. He was very handy, and could do everything for himself except Refrigeration. Whenever he had to call them he would get...
  38. Tell us more

    Henderson,

    Do you just want a percentage, or do you want annual cost of operation?
  39. Replies
    11
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    1,165

    Can they answer part of my question?

    Is it OK just to ask for a brand, or model #?
  40. Replies
    11
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    1,165

    Sorry

    I'm sorry, I didn't realize I was breaking the rules. I'll look into the Pro thing. I've been doing HVAC since 1975.

    Mike
  41. Replies
    11
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    1,165

    Water Heater with desuperheater coil?

    Does anyone know of a small residential water heater tank with a desuperheater coil built into it? I would like to begin marketing this to my customers, but I would like to add the new tank...
  42. Replies
    24
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    1,498

    do's and don'ts

    Creacy,

    To people who know you, and know if you are good, sincere, honest, etc. your name won't matter. If you live in a town of under 5,000 people it probably won't matter. No matter where...
  43. Replies
    7
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    1,410

    Vapor Barrier

    EE,

    I'm sure you are loosing some capacity through your poorly insulated supply. Personally I hate ductwork in the attic for this reason. Why do we put 3.5 inches in the walls and 6" in our...
  44. Replies
    2
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    727

    10 degrees ok

    10 degrees or so of superheat should be fine in heating or cooling mode, howeber don't confuse this with the charging method. Charging could be very critical based on the ratio of volume of the...
  45. Replies
    6
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    738

    closed minded bad luck

    I have had bad luck with many of the universal type relays, although, I don't see why. The concept of simply droping out the start cap after a certain amount of time seems sound to me. Maybe we...
  46. Replies
    6
    Views
    738

    mfg first

    If the mfg's choice is readily available, we use it, if not we use this method. We also use it as a trouble shooting tool, as often we find wrong relays on units serviced by others.
  47. Replies
    2
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    557

    I think you will decrease combustion effeceincy...

    I think you will decrease combustion effeceincy slightly and increase temperature transfer effeciency slightly for a net slight positivie effect, at the possible expense of rusting your heat...
  48. Replies
    6
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    738

    any answers or theories ?

    Come on guys. This was my first post on this website. I'm not impressed yet. Did I post in the wrong forum?:rolleyes:
  49. Replies
    6
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    738

    Mars 70 bad choice?

    I have always taught my techs to size their start relays by measured back EMF, and choose a realy that has a pick up about 1/2 way between incoming voltage and the measured back EMF. Then check to...
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