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  1. #1
    Join Date
    Nov 2004
    Location
    Northern California - Bay Area
    Posts
    20
    In a condo I reciently visited, I noticed that the Carrier Upflow a-coil was mounted under the furnace and not above. All other installs I have seen, have had the a-coil mounted above the furnace for upflow configuration. My understanding is that this could cause corrosion of the heat exchanger. Was it installed backwards?

  2. #2
    Join Date
    Jan 2005
    Location
    Littleton, CO
    Posts
    267

    Question

    Was the furnace in a downflow scenario? If its in a upflow, its installed incorrectly.

  3. #3
    I could almost bet that this is a down flow furnace. It is normal and where did you hear it will cause the heat exchanger to go bad?

  4. #4
    Join Date
    Nov 2004
    Location
    Northern California - Bay Area
    Posts
    20
    This is definately an upflow, The return air and filter are on the bottom with the flex-boot end supply plenum on the top.

  5. #5
    Check the warranty on the exchanger, you are going to need it.

  6. #6
    Join Date
    Nov 2004
    Location
    Northern California - Bay Area
    Posts
    20
    Does this matter if is an Electric Furnace.

  7. #7
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Yes,totally different .

  8. #8
    Join Date
    Nov 2004
    Location
    Northern California - Bay Area
    Posts
    20
    Thanks Dash,

    So does this mean is is correctly installed?

  9. #9
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Yes,if it's an electric furnace,same way most all air handlers are setup,no probelm.


    For the record,with gas,having the cold air off the coil,cool the heat exchanger that has an air path(flue) to outside air ,will cause sweating and thus rust heat exchanger.At least that's what I was told.

  10. #10
    Join Date
    Oct 2004
    Posts
    3,400
    Originally posted by hvacnate
    Thanks Dash,

    So does this mean is is correctly installed?
    Yes, it is probably installed correctly.
    Many air handlers come with the coil already installed.
    Heat strips are added, as needed, to customize the installation for heat loss.
    Air is drawn through the coil, then pushed over the heat strips.
    Do you not usually see any electric furnaces in your service area?
    I'd bet you could get some info from your supply house.
    Even the manufacturer's website would have some info.

    Here's one from Trane:
    http://www.trane.com/Residential/Sel...m/acandah.aspx


  11. #11
    Join Date
    Nov 2004
    Location
    Northern California - Bay Area
    Posts
    20
    I deal with residential installs in Northern California and 99% are natural Gas. This is the first Electric I have come across and it looked odd from the start. Thanks everyone for the great information.

  12. #12
    That setup with an electric furnace is very common.
    Hey cockroach, don't bug me!

    www.AskTheDiceman.com

    www.TheColdConspiracy.com

    www.Pennwood-HVAC.Com

    Bring Em Home....

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