Define Twinning
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Thread: Define Twinning

  1. #1
    Join Date
    Apr 2002
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    waco,tx
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    85
    How about twinned triplets lol...
    pulled out an OLD 40 ton carrier ahu and 40 ton condenser and replaced with these 7.5 ton units with twinned 20 ton condensers running off a single 2 stage heat/ 2 stage cool t-stat.
    i hated the fact that our insulator used duct tape on the linesets.



    [Edited by chriskmb5150 on 12-16-2005 at 02:56 AM]
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  2. #2
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    Apr 2004
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    Bartlett, IL
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    Wow, looks like some tight quarters there, is there enough combustion air for them babies?

  3. #3
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    Aug 2002
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    Southold.calm
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    I prefer duct tape over wire ties. Nice job

  4. #4
    Join Date
    Dec 2005
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    CHICAGO(dork SIDE),IL(GO SOX)
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    67
    wow that looks nice , i think zip ties would look better around them line sets, but either way it looks nice...
    hey can any one explain twinning a little better to me?

  5. #5
    Join Date
    Dec 2005
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    CHICAGO(dork SIDE),IL(GO SOX)
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    hey what is that on the sunction line at the top? im barely in the field so i want to absorb as much info i can get

  6. #6
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    Dec 2002
    Location
    Rochester, MN
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    Looks good...


    BUT>......


    4 out of 6 is vented.

  7. #7
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    Apr 2004
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    Bartlett, IL
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    Perhaps 4 are used for heating and 6 used for cooling?....

  8. #8
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    Apr 2004
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    Originally posted by wannagetstarted
    hey what is that on the sunction line at the top? im barely in the field so i want to absorb as much info i can get
    Solenoid valve. Its on the liquid line.

  9. #9
    Join Date
    Apr 2002
    Location
    waco,tx
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    85
    Originally posted by wannagetstarted
    wow that looks nice , i think zip ties would look better around them line sets, but either way it looks nice...
    hey can any one explain twinning a little better to me?
    twinning is using 2 or more smaller systems running together to make one larger system. such systems use one thermostat and usually share common return and supply ducting. most manufactors sell twinning controls for their equipment.
    carrier makes a neat tripling kit but their twinning kit sucks.

    for instance: at this job we took out a 40 ton air handler that heated and cooled a church sanctuary. these new units are in a second floor closet..
    the old air handler was on the first floor directly under these units with the return air duct running in the 1st floor ceiling and the supply duct coming up thru the floor behind where im standing and going thru the 2nd floor ceiling into the attic space above me and running overhead where these units are sitting and to the sanctuary attic space.
    well, the church wanted to use the mechanical room on the first floor for storage so we sugggested using this closet on the second floor but we couldnt get such a large 40 ton air handler in there so we used 6 - 7.5 ton units.

    we cut a large hole in the floor and ran a duct down from floor level to the top of the existing return air duct in the attic space below then built this wooden platform to use as a return air plenum. then after we set the furnaces and coils we manifolded all of coils the into the existing supply duct in the attic above.
    hope that explains twinning a little better.



    Originally posted by wannagetstarted
    hey what is that on the sunction line at the top? im barely in the field so i want to absorb as much info i can get
    thats where the txv sensing bulbs are... the bulge is just armaflex.



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  10. #10
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    Apr 2002
    Location
    waco,tx
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    Originally posted by mayguy
    Looks good...


    BUT>......


    4 out of 6 is vented.

    only 4 furnaces are used for heating, all 6 are used for cooling.
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  11. #11
    Join Date
    Dec 2002
    Location
    Rochester, MN
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    Originally posted by chriskmb5150
    Originally posted by mayguy
    Looks good...


    BUT>......


    4 out of 6 is vented.

    only 4 furnaces are used for heating, all 6 are used for cooling.
    So the two are just air handlers? Or gas furance that is not hooked up?

  12. #12
    Join Date
    Apr 2002
    Location
    waco,tx
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    Originally posted by mayguy
    Originally posted by chriskmb5150
    Originally posted by mayguy
    Looks good...


    BUT>......


    4 out of 6 is vented.

    only 4 furnaces are used for heating, all 6 are used for cooling.
    So the two are just air handlers? Or gas furance that is not hooked up?
    furnaces that arent hooked up. Basically just blower coils
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  13. #13
    Join Date
    Dec 2002
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    Rochester, MN
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    Wouldn't it be cheaper to just just an air handler in rather the furnace that will not be used for heating???

    I'd think that's a waste??

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