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Type: Posts; User: gregscott

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  1. Replies
    8
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    617

    Thanks everyone, Bob. You were correct....

    Thanks everyone, Bob. You were correct. Evacuate, drier, vacuum, recharge; working properly.

    Thanks again.
  2. Replies
    8
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    617

    What about the the oil Bob; is that normal? ...

    What about the the oil Bob; is that normal? Could oil cause this condition? Would the low side fluctuate also if it was air? Have you seen 100psi swing from air in system?

    I am trying to...
  3. Possibly one is supply and one is return. ...

    Possibly one is supply and one is return. Probably need to locate the air handler/furnace and see where the air is returned and supplied.
  4. Replies
    12
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    486

    Could it be undercharged from the factory?

    Could it be undercharged from the factory?
  5. Replies
    8
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    617

    High Side Presure Fluctuating Wildly

    Looking at a 4 ton goodman R22 condenser with a reciprocating compressor, fixed orifice 4 ton evaporator.

    High side fluctuating between 180psi and 280 every 60 seconds; low side steady at 50. ...
  6. Replies
    29
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    3,610

    Can you give me an example of one of these...

    Can you give me an example of one of these conversions?
  7. Replies
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    3,610

    Best answer. Thank you. So, can you think of...

    Best answer. Thank you. So, can you think of anything that does not require the transfer of heat? I cannot, I suspect that the reference in post #7 to conversion of one form of energy to another...
  8. how large is the transition problem? Could loose...

    how large is the transition problem? Could loose a little there, but could the system be undersized? If it is sized for 95 degrees, and it is 100 outside, maybe she is doing all she was designed...
  9. Replies
    29
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    3,610

    It is a law of "THERMO" dynamics. Can you think...

    It is a law of "THERMO" dynamics. Can you think of a form of energy that does not involve heat? I was under the impression that every thing in the universe happens because of heat flowing from a...
  10. Replies
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    3,610

    If heat is a form of energy, then wouldn't the...

    If heat is a form of energy, then wouldn't the statement hold true?
  11. Replies
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    3,610

    Laws of Thermodynamics?

    One law of thermodynamics is "heat cannot be created or destroyed", I think this means we just move it around.

    How does fire work according to this principle?

    How does resistance heating work...
  12. Replies
    10
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    1,604

    Duct Sizing---Again

    Is the return duct grill sizing larger than the opening in the bottom of the air handler?

    I am looking at my 4 ton upflow air handler. The return grill is two 12x18 registers cut through the...
  13. Replies
    107
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    6,175

    I remember BP poked a hole in the Gulf of Mexico...

    I remember BP poked a hole in the Gulf of Mexico the other day and the oil was coming out like lava.

    I saw a documentary on oil, and when they hit the oil, it was coming out like lava.

    What I...
  14. Replies
    9
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    886

    I am not familiar with the type of metering...

    I am not familiar with the type of metering device on this machine. I forgot to add that this is a heat pump.

    Metering device: 3/8' liquid line comes into cabinet and transitions to 1/2" with...
  15. Replies
    9
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    886

    Oversized Evaporator?

    Working on a 1980's model GE air handler with a 3ton Lennox consensor. On charging, chart calls for 80psi low side at 95F outdoor air. Did not matter how much refrigerant (r-22) I added, low side...
  16. Replies
    3
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    695

    Defrost Timer?

    I have some general questions about the defrost timer.

    1. I thought (gets me in trouble alot) that the defrost cycle could be initiated by jumping the defrost pins on the defrost timer board. ...
  17. Replies
    15
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    1,504

    Off Cycle

    Good information, thank you. I believe the Rheem unit I worked on had a port on the defrost timer for the CCH. I will assume, unless I am advised otherwise, that the board will energize the CCH in...
  18. Replies
    15
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    1,504

    Assisted, could you explain why it is so...

    Assisted, could you explain why it is so important?
  19. Replies
    15
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    1,504

    Thanks Cooked. I saw you were an engineer, you...

    Thanks Cooked. I saw you were an engineer, you have probably done a little snooping yourself. I am not an engineer, but always drive repairmen crazy standing over them; combination of curious and...
  20. Replies
    15
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    1,504

    Yes, especially in Amarillo

    That was my understanding. The reason I ask, was that I put a scroll compressor on a Rheem heat pump and recommended a CCH to the customer. He had just paid for a new Carrier from a larger local...
  21. Replies
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    837

    Solution?

    Am I breaking any rules if I say "Support Ron Paul".

    I think there is a spiritual element to people's blindness.

    Thessalonians II 2:11-12. "And for this cause God shall send them strong...
  22. Replies
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    1,504

    Crank Case Heater

    Is it necessary or beneficial for a heat pump with a scroll compressor to have a CCH?
  23. I am not familiar with the Mr. Slim, I was giving...

    I am not familiar with the Mr. Slim, I was giving some general advice. You could call your factory rep or contractor for specific advice on that unit, or someone on this site that is more familiar...
  24. Heat Pump

    It is normal for your heat pump to create less heat as the outdoor temperature declines. The heat pump is taking heat from outdoors and bringing it into your home. As the outdoor temperature falls,...
  25. Replies
    5
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    559

    Apologies for the confusion. The machine I was...

    Apologies for the confusion. The machine I was referring to is two high pressure residential 3-4 ton, R-22 units twinned together.

    It was the thermostat causing the delay. I am new to the...
  26. Thread: York GZFD

    by gregscott
    Replies
    5
    Views
    635

    Good advice; I will check the ground and neutral...

    Good advice; I will check the ground and neutral with my meter.
  27. Thread: York GZFD

    by gregscott
    Replies
    5
    Views
    635

    York GZFD

    Worked on a York with a bad transformer. Installed the new transformer and a fuse-able link on the low voltage side just in case of problems. Board flashes a code for "115 vac power lines crossed";...
  28. Replies
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    564

    Thank you all for your input. I think your are...

    Thank you all for your input. I think your are both correct that the thermostat is what sets the delay; I will find out tomorrow. Thanks again for your great forum and, I look forward to my next...
  29. Replies
    5
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    559

    Cooling Cycle

    I need to know what makes the fan blower continue to run for 60-70 sec after the compressor has turned off? This system is 30 yrs old and does not use a circuit boar. Is that the thermostat?
  30. Replies
    5
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    564

    Thermostat is set correctly. I was under the...

    Thermostat is set correctly. I was under the impression that the fan will continue to run for about 75 seconds after the compressor has stopped to utilize the remaining coolness of the evaporator. ...
  31. Replies
    5
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    564

    Cooling cycle

    I am new to the AC business and was called to a job where two old systems were twinned together and one had badly burnt wires. I think the fire rolled out so I checked the exchanger, checked for CO2...
  32. Replies
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    1,752

    Poll: confused

    Hello from Texas. I am just getting started in HVAC and glad to have found a forum for discussion. I have never posted to a blog and haven't figured out how to post a question here.

    Thanks for...
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