Search:

Type: Posts; User: Dennis.Moore

Page 1 of 4 1 2 3 4

Search: Search took 0.01 seconds.

  1. I show them that the repair cost and potential...

    I show them that the repair cost and potential future repair costs (point at rusty condenser fan motor running above nameplate amps) is already more than half of what a new system costs.
    I tell...
  2. Replies
    23
    Views
    10,748

    Hey .. lets put some electronics in a potentially...

    Hey .. lets put some electronics in a potentially hot humid vibrating and magnetically diverse environment and see what happens.
    I think we're still in the stone age when it comes to robotic motors....
  3. Your compressor came all apart inside dispersing...

    Your compressor came all apart inside dispersing garbage into the system. Wiring varnish .. ash .. mechanical shavings etc.
    Replace the drier .. you are doing a cleanup. Your lucky the metering...
  4. Replies
    65
    Views
    3,289

    Open bypass or valve reeds bent open?

    Open bypass or valve reeds bent open?
  5. Replies
    4
    Views
    491

    This application is on an open business in the...

    This application is on an open business in the height of summer where downtime costs money.
    It's on a rooftop where lugging up extensive test equipment and spending additional time was just not cost...
  6. Replies
    4
    Views
    491

    Yeah from now on I will add the phrase, "I can...

    Yeah from now on I will add the phrase, "I can change the compressor ... but I can't change or detect immediately any damage the explosion may have caused".
  7. Replies
    65
    Views
    3,289

    "So what the heck is my air compressor doing...

    "So what the heck is my air compressor doing then?"
    pumping air and condensing water.

    I suspect the system had a low side leak and sucked in air falsely raising the condensing pressure.
    There...
  8. Replies
    4
    Views
    491

    Fun with explosions and metallurgy

    Had a compressor blow out the terminals in a packaged rooftop unit.
    Replaced the compressor, pulled deep stable vacuum recharged system.
    Four days later .. gas was gone. Leak checked my joints...
  9. You will have only one suction pressure at the...

    You will have only one suction pressure at the compressor, no matter how it's piped.
    Basically you want have the suction lines as similar as possible to avoid different suction pressures at the...
  10. Replies
    10
    Views
    1,190

    Buy two long ropes tie up four items. Unless you...

    Buy two long ropes tie up four items. Unless you just like to fish.
  11. Replies
    65
    Views
    3,289

    Air is not condensable.

    Air is not condensable.
  12. I saw it once last year and this year knew what...

    I saw it once last year and this year knew what to do.
    On humid days and on older equipment water tends to sit in pan and gets blown out by air turbulance into crack between pan and electrical box....
  13. Replies
    57
    Views
    4,271

    No superheat means no load. the unit is...

    No superheat means no load. the unit is overcharged or your temperature sensor is broken or your gauges are off.
  14. Replies
    28
    Views
    1,514

    What he said .. you can only achieve a certain...

    What he said .. you can only achieve a certain net refrigeration effect with a certain line size.
    for example ... if you are on a boat with a bilge pump ... it may work great when you spill a beer...
  15. Replies
    145
    Views
    8,924

    ok lets mount a computer on the back of a motor...

    ok lets mount a computer on the back of a motor and see how long it lasts ...
    lets put another one outside in the condenser ...
    my stuff may not save me 10 cents a day ... but at least
    i don't...
  16. All the numbers in the world aren't going to...

    All the numbers in the world aren't going to aren't going to give you common sense.
    Whenever you as a question about a dynamic system that constantly fluctuates from environmental factors the...
  17. Replies
    14
    Views
    918

    Inside harder to service and diagnose vs outside...

    Inside harder to service and diagnose vs outside more chance of environmental factors affecting coil operation.
  18. Replies
    11
    Views
    629

    Every compressor self cools with the suction line...

    Every compressor self cools with the suction line gas. You said bench test ... something tells me the problem wasn't in the compressor.
  19. Replies
    53
    Views
    2,255

    When the control board tries to light the furnace...

    When the control board tries to light the furnace
    It turns on the vent blower
    then checks for vent pressure differential
    if it thinks the vent fan is working it turns on the igniter then opens the...
  20. I charge a TEV system until the superheat...

    I charge a TEV system until the superheat stabilizes. That means the valve has reached it's setpoint and no matter how much more gas you add ... the valve is not going to open any farther. Then I...
  21. Thread: Nest?

    by Dennis.Moore
    Replies
    17
    Views
    1,019

    They don't have internal batteries so you have to...

    They don't have internal batteries so you have to have a common (ground lead) to power the stat ... if no ground lead is provided they periodically tell the system to turn on (very briefly) to steal...
  22. Replies
    11
    Views
    5,656

    http://www.americancompressorinc.net/upload/Compre...

    http://www.americancompressorinc.net/upload/Compressor_Wireing_Diagrams.pdf
  23. Replies
    6
    Views
    343

    Dirty condenser, low refrigerant, bad run / start...

    Dirty condenser, low refrigerant, bad run / start capacitor, bad start assist capacitor, weak overload in compressor. or all of the above. The overload is on the common lead.. pull that lead off the...
  24. Replies
    37
    Views
    2,082

    The Joy of Experience

    So I get a ladder call from another tech who won't buy a ladder or a ladder rack. I go to this apartment (walk past another companies ladder) and she says yeah just got a new unit last year ... and I...
  25. Replies
    22
    Views
    1,597

    EEV Electronic expansion valve...

    EEV
    Electronic expansion valve
    http://www.munchsupply.com/UserFiles/file/TAM7%20INSTALL.pdf
  26. Replies
    13
    Views
    1,129

    correct Amps = proper capacitance.

    correct Amps = proper capacitance.
  27. It's called transient torque. When a power...

    It's called transient torque.
    When a power interruption causes a radical change in the phase angle the magnetics can spin the rotor the other way.
    I've seen it happen on 3 phase motors in YORK...
  28. Replies
    5
    Views
    421

    Is it single phase? Scroll Compressor or Piston?...

    Is it single phase?
    Scroll Compressor or Piston?
    Is the compressor wired correctly?
    Compressor running in correct direction?
    ...
  29. Replies
    19
    Views
    1,043

    I have the SMAN 3. Two years old and the high...

    I have the SMAN 3.
    Two years old and the high pressure transducer starts at 159 lbs and goes up or down from there. (had to calculate subcooling after subtracting 159 from reading).
    Bought the Sman...
  30. Replies
    66
    Views
    4,142

    http://thumbs1.ebaystatic.com/d/l225/m/meVgkb9sffw...

    http://thumbs1.ebaystatic.com/d/l225/m/meVgkb9sffwiEHjmBdQtvhw.jpg
    Hey it's better than shaking the jug.
  31. Replies
    66
    Views
    4,142

    I don't think you need an expensive charge...

    I don't think you need an expensive charge weighng scale just to add gas ..
    Or do you expect someone who is on a service call to pull out all the refrigerant then weigh it back in?
    Just makes sense...
  32. Replies
    66
    Views
    4,142

    And when you have spent three hours weighing in...

    And when you have spent three hours weighing in the charge you never have to adjust it?
    Seems to me the calculated charge is only a starting point and the fine tuning comes in when you use your...
  33. Found a new installation with to stage furnace .....

    Found a new installation with to stage furnace .. "last tech out" had put in a (cooling 2 stage heating one stage) thermostat. Unit was running in first stage of heat. I connected w-1 to w-2 and...
  34. Replies
    20
    Views
    7,759

    A solid column of liquid at the expansion device.

    A solid column of liquid at the expansion device.
  35. Replies
    66
    Views
    4,142

    I try to keep my gadget buying to a minimum. I...

    I try to keep my gadget buying to a minimum. I don't see a problem using my bathroom digital scale. Cost $20 and works good enough for the girls I go out with.
    When it breaks I'm not out an arm and...
  36. Excellent

    Excellent
  37. It's 30 feet up and it's cold in the wind. Wires...

    It's 30 feet up and it's cold in the wind. Wires are covered in dust, colors are imperceptible. Not the kind of place I want to spend four hours making a sketch.
    Thanks dandyme for the spec sheet...
  38. What type and brands of HVAC parts do you intend...

    What type and brands of HVAC parts do you intend to supply? What will be the geographic range that you will supply? Do you want to enable sales and delivery of HVAC parts via the Internet?...
  39. The p-trap at the air handler goes before the...

    The p-trap at the air handler goes before the vent to keep air from blowing out or sucking in by creating a liquid seal. If it gurgles make a bigger trap.
    The vent lets the air in so the water can...
  40. Replies
    6
    Views
    513

    Be careful with the gasket .. might wanna pick up...

    Be careful with the gasket .. might wanna pick up some hi temp permatex.
  41. Clean the barbed port on the draft inducer...

    Clean the barbed port on the draft inducer housing while you are there ... seen them plug with soot.
  42. Replies
    22
    Views
    1,721

    Customer needs refrigerant? why? Where's the...

    Customer needs refrigerant? why?
    Where's the leak? How big is the leak? How much to fix?
    How much (scale) refrigerant? at what price?
    Why are you back adding refrigerant when you filled it last...
  43. Replies
    16
    Views
    1,358

    Have a well stocked truck and run service calls...

    Have a well stocked truck and run service calls and do installs, maybe even some sales, gain experience and confidence then get your AC license.
  44. 50 piece nut driver set check Wheel puller ...

    50 piece nut driver set check
    Wheel puller check
    Torque bar to fit puller check
    Crescent wrench check
    Acetone and WD-40 check
    Bandaids check
    Good...
  45. Replies
    7
    Views
    600

    hate to have to change out that motor

    hate to have to change out that motor
  46. Old Rheem package unit - need model number

    461121
    No tags on this thing. I think it's from 1990 - 1992.
    Playing hell trying to diagnose an electrical problem and there's no wiring diagram.
    If anyone recognizes this unit and knows the model...
  47. Most newer furnaces use a technique called flame...

    Most newer furnaces use a technique called flame rectification to determine this. The sensor is a small stainless steel rod that is insulated with a ceramic insulator.
    A wire is attached to the...
  48. Replies
    15
    Views
    1,394

    You could install a relief pipe and a solenoid...

    You could install a relief pipe and a solenoid valve to maybe change it to a squealing cat noise.
  49. I'm with the guy that said AMP draw. Somebody...

    I'm with the guy that said AMP draw.
    Somebody made a motor and stamped a number on it ... some guy made a capacitor and stamped a number on it .. you are the guy that has to make it all work. If it...
  50. Replies
    18
    Views
    1,459

    do you have 24v on terminal W?

    do you have 24v on terminal W?
Results 1 to 50 of 197
Page 1 of 4 1 2 3 4
Comfortech Show Promo Image

Related Forums

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