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  1. It sounds like your system is oversized. You can...

    It sounds like your system is oversized.
    You can experiment with CPH, but it most likely won't produce the desired outcome.
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    I ran a call yesterday, another company condemned...

    I ran a call yesterday, another company condemned the compressor on a 5 year old unit.
    I had it running in 10 minuets.
    I have no idea if your need a new system, but from the sound of it, I would...
  3. With a heat pump, you have an economic balance...

    With a heat pump, you have an economic balance point, and a thermal balance point.
    I would ask a QUALIFIED contractor to check your system and give you some guidance.
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    If you received any paperwork, did it have any...

    If you received any paperwork, did it have any numbers regarding return and supply temps?
  5. Maybe a return in each room would help. "As this...

    Maybe a return in each room would help.
    "As this is a new house". Most new construction is done as cheap as possible.
  6. I would be looking at 90+ efficiency in your...

    I would be looking at 90+ efficiency in your climate.
    Ducane makes a nice 2 stage 90+.
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    Over sizing is bad, even with 2 stage equipment....

    Over sizing is bad, even with 2 stage equipment.
    We have no idea what size you actually need.
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    So you're a tech, or you offered to fix it with...

    So you're a tech, or you offered to fix it with no idea of what you're doing?
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    Not a fan of the YP9C or the TG9S. Not familiar...

    Not a fan of the YP9C or the TG9S.
    Not familiar with particular Payne or Keepright models.
    Ask the contractor to explain the difference.
    Personally, I prefer a 2 stage with variable speed blower....
  10. I have no idea what the seer rating is in low...

    I have no idea what the seer rating is in low stage, but I doubt if it reaches 17.
    2 stage equipment is for added comfort, NOT efficiency.
    By the way - SEER is the number of BTU's removed per watt...
  11. 1 Two stage equipment is to increase comfort....

    1 Two stage equipment is to increase comfort. Most designs will use several different speeds.
    2 Your heating or cooling unit needs to replace or remove the number of BTU's you house loses or gains....
  12. You need to re-read your formulas.

    You need to re-read your formulas.
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    908

    They cannot run together.

    They cannot run together.
  14. I've never seen good duct work in a manufactured...

    I've never seen good duct work in a manufactured home.
    Most likely air flow is the problem.
    Did they check static pressure?
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    One thing to keep in mind - Zoning systems are...

    One thing to keep in mind -
    Zoning systems are intended to keep the zones relatively even, not to create large temperature differences.
  16. What is the run time when it's hot?

    What is the run time when it's hot?
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    I usually recommend keeping 1 set temp 24 hours a...

    I usually recommend keeping 1 set temp 24 hours a day for cooling.
    If company is coming over, i'll bump it down before they get there.
    I would ask the installer to verify temp drop, super heat, and...
  18. Replies
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    492

    You asked "so what is the correct speed?" I gave...

    You asked "so what is the correct speed?"
    I gave it to you.
    Your installer seems to be lacking in the finer points of
    A - Customer communication
    B - The needed technical skills on the unit he is...
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    492

    The correct speed is 350 to 400 cfm per ton. It...

    The correct speed is 350 to 400 cfm per ton.
    It should be adjustable.
  20. Done properly, 2 systems are the best way to go.

    Done properly, 2 systems are the best way to go.
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    If your system decreases the temp quickly, it's...

    If your system decreases the temp quickly, it's most likely over sized.
    Systems are designed to maintain the temp, not do a hot pull down.
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    I think it's broken. Call for service.

    I think it's broken.
    Call for service.
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    228

    If you are doing the job, I would not recommend...

    If you are doing the job, I would not recommend it. If you're having a reputable contractor do it, should be a piece of cake.
  24. I just looked at the chart for your design temp....

    I just looked at the chart for your design temp.
    104 degrees is OFF THE CHART.
  25. 104 degrees in SF? That seems way past your...

    104 degrees in SF?
    That seems way past your design temp.
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