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  1. #27
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
    Posts
    3,371
    www.aridirectory.org

    You can plug in ARI reference #'s 1003557 and 1003592 to see performance data on SEER, HSPF, EER, and BTU/H.

  2. #28
    Join Date
    Apr 2004
    Posts
    7,680
    I did that too, I wonder why the HSPF is 8.7 in one, and 7.0 in the other?

  3. #29
    Join Date
    Jun 2007
    Location
    The Twilight Zone
    Posts
    2,964
    Quote Originally Posted by Waterloo View Post
    Is your coil ON TOP of your blower? Should be below the blower. Otherwise, you aren't allowing the heat pump to raise the temperature as well as it should.

    Temperature rise @240V, 1200 CFM:
    4.8KW=13, 7.2KW=19, 9.6KW=25, 14.4KW=38, 19.2KW=50

    The difference between your two aux heat numbers (150 and 136) makes me think that you've got 14.4KW strips. I also think that you might have picked up some radiant heat from the elements/coil. Can you measure it immediately after a turn (perhaps a bypass humidifier duct)?
    Coil is indeed below the fan. Electric strips are above the fan.

    Air handler cfm ranges between 1490 (at .1" static pressure) and 1205 (at .5" static pressure). Not sure what I have, but all-metal ducts and 2 levels of living space (1600 sq ft) makes me think I'm at a low static pressure figure.

    I have 10 kw aux heat for the heat pump, 15 kw total emergency heat.

    I will retest. The 150 degrees seems too high for 10 kw of aux heat. Maybe the t-couple wire was too close to the electric strips for an accurate air temperature.

    Thanx.

  4. #30
    Join Date
    Jun 2007
    Location
    The Twilight Zone
    Posts
    2,964

    Performance data

    That combination is 35,600 btu cooling, 11.7 EER, 16 SEER, 33,200 btu heating at 47 degrees, 19,900 btu heating at 17 degrees.

    I am not sure why one ARI# lists an 8.2 HSPF while the other lists a 7 HSPF. The heating btus in both ARI#s are exactly the same.

    What is "+TDR" listed after the air handler model#? It's not a TXV, is it?

  5. #31
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
    Posts
    3,371
    Quote Originally Posted by docholiday View Post
    I did that too, I wonder why the HSPF is 8.7 in one, and 7.0 in the other?
    Could it be for the different stages or would the HSPF not change depending upon which stage it's in?

  6. #32
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,875
    Time
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    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  7. #33
    Join Date
    Jun 2007
    Location
    The Twilight Zone
    Posts
    2,964
    Quote Originally Posted by beenthere View Post
    Time
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    Thank you, beenthere. Appreciate the knowledge.

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