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  1. #1
    Join Date
    Jul 2005
    Posts
    11
    The contractor that installed my 2.5 ton split system used the incorrect evap. fan blower. On low speed it is pushing out approx. 1400 cfm. According to the maufacture, this unit should be at 1050 cfm. My question is can I either replace the fan speed circuit controller with another one or can I put an inductor in series with the motor to limit the current to slow it down or do you recommend replacing the the whole blower?

  2. #2
    Join Date
    Mar 2003
    Location
    Cincinnati
    Posts
    7,977
    Why don't you get your contractor to fix it if he installed improper equipment?

  3. #3
    Join Date
    Jul 2001
    Location
    Gold Coast of Connecticut
    Posts
    4,656
    your duct work is oversized that much.........hmmmm!
    Aire Serv of SW Connecticut- Gas heat, dual fuel and central a/c systems installed and serviced

  4. #4
    Join Date
    Jul 2005
    Posts
    11

    Blower

    The contractor that installed my equipment is out of business.

  5. #5
    Join Date
    Jun 2005
    Posts
    347
    find who the local manufacture rep. is and ask them to recremend some one. usualy the manufacture will stand behind the equipment instaled some what. thay are not responsipal for the work done. they can point you in the right direction. this should be repaired by a service company not the home owner.

  6. #6
    Join Date
    Aug 2003
    Location
    Henderson, NV
    Posts
    209
    Elaborate a bit, what make is the system, and is it a variable speed blower motor

  7. #7
    Join Date
    Apr 2004
    Posts
    7,680
    Whats the actual airflow? Stamped ratings dont cut it.

  8. #8
    Join Date
    Jul 2005
    Posts
    11

    Manufacture

    The name of the manufacture is Luxaire. There is a manual blower speed control on the blower. I already have it set on low speed.

    [Edited by rnoecker on 07-22-2005 at 11:43 PM]

  9. #9
    Join Date
    Jul 2005
    Posts
    11

    Air flow Measurement

    The actual airflow that I measured coming out all the supply ducts totaled 1400 cfm.

    [Edited by rnoecker on 07-22-2005 at 11:41 PM]

  10. #10
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    16,121
    Install an air bear filtering system that will slow down the old motor plenty probably put you right in the old ball park of the needed cfm's.
    By the way how did you measure the cfm's? I use a tape measure and measure from the grille to end of air flow but it's a special tape measure, I stole it out of Doc's tool bag.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". - Vernon Law

    "Never let success go to your head, and never let failure go to your heart". - Unknown

  11. #11
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,763
    Model number of blower and coil is????
    Contractor locator map

    How-to-apply-for-Professional

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

  12. #12
    Join Date
    Apr 2004
    Posts
    7,680
    Check the pressure drop accross the coil. We'll see how accurate 1400 is.

  13. #13
    Join Date
    Aug 2003
    Location
    Central Kentucky
    Posts
    6,248

    Re: Air flow Measurement

    Originally posted by rnoecker
    The actual airflow that I measured coming out all the supply ducts totaled 1400 cfm.

    [Edited by rnoecker on 07-22-2005 at 11:41 PM]
    Just curious what did you use to determine the airflow with?
    Have you set up a Google alert for Carbon Monoxide yet?
    Click here to find out how.

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