Right or Wrong
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Thread: Right or Wrong

  1. #1
    Join Date
    May 2007
    Posts
    3

    Question Right or Wrong

    Can any one tell me if I can set up a Lennox hot air furnace for ac? The furnace's model number is G11Q4E137V7 with electronic spark ignition control model # S8610U and the blower is being controlled by a line voltage fan limit control. I'm a heating contractor that never had to convert an existing furnace, that was never set up for ac and add the necessary controls. So the owner can use his old unit to operate his AC. I believe that the only controls that I might need is a R8285 control center and R8222 switching relay. If any one can tell me if I'm right or wrong and knows the wiring of the new controls with the old furnace controls would be greatly appreciated.

  2. #2
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    if my memorie is correct that unit goes back to the late 60 or early 70s

    why are you waisting your time on a unit that IMO should be replaced
    even if it is still intact how much more life do you think it has

    replace the system and be safe and be done

  3. #3
    Join Date
    May 2007
    Posts
    3

    the owner wants it

    I know what you mean I would love to change it all out, but the owner wants it that way plus the unit was taken good care of it it still has balls

  4. #4
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    It can be done but this needs to be in the pro forum. I will tell you youll need a fan relay with n/o and n/c contacts.

  5. #5
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    alrighty then
    if memorie serves me
    that furnace come set up for ac

    i could be wrong also that is an old unit

  6. #6
    Join Date
    Apr 2007
    Location
    MN
    Posts
    297
    I've done this on an old furnace a few years ago. It's not hard or expensive and you don't need anything but the relay like ar_hvac_man said. Go to the pro forum and I'll tell you how to wire it.
    S**t or get off the pot!

  7. #7
    Join Date
    Mar 2007
    Location
    Myrtle Beach, SC
    Posts
    2,919
    That unit has a 4-ton blower. If you can find a serial number I can probably tell you how old it is.
    Remember, Air Conditioning begins with AIR.

  8. #8
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,697
    checked on davenet and that furnace came from the factory set up for a/c.

  9. #9
    Join Date
    May 2007
    Posts
    3

    I have it

    Quote Originally Posted by Kevin O'Neill View Post
    That unit has a 4-ton blower. If you can find a serial number I can probably tell you how old it is.
    serial # 5883d16730

  10. #10
    Join Date
    Mar 2007
    Location
    Myrtle Beach, SC
    Posts
    2,919
    April 1983. 24 years old!

    If he wants to reuse the furnace, so be it. Lennox was built like a tank in those days, even more so than today.
    Remember, Air Conditioning begins with AIR.

  11. #11
    Join Date
    Dec 2006
    Location
    Middle Tennessee
    Posts
    11,347

    *

    Quote Originally Posted by Kevin O'Neill View Post
    April 1983. 24 years old!






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