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  1. #1
    Join Date
    Feb 2005
    Location
    Dothan, Al
    Posts
    3,453
    Please excuse me if ya'll have heard this one before.

    Why do some manufacturers install 1 pole contactors on some residential systems ?
    Was asked this by me tech ( my wife )

    Oh yea, just asking, how many female service techs ya'll seen out there ??

    Richard

  2. #2
    Join Date
    Oct 2004
    Posts
    1,722
    Originally posted by bornriding
    How many female service techs ya'll seen out there ??

    Richard
    Six years...one inside the company...zero outside.
    Get back to work.

  3. #3
    Join Date
    May 2004
    Posts
    1,308
    I'm guessing that the one pole contactor was made to save money, because the compressor won't start if it gets only 120 VAC... The cost of springs, contacts, etc... is less than a simple buss bar on the second 'leg'.

    If I'm wrong...








    It's the medication I'm on....



    Teach the apprentices right... and learn from their questions and ideas.

  4. #4
    Join Date
    May 2004
    Posts
    1,308
    No.... I meant... the cost of springs and contacts is not nearly as less than........... ah fer-gittit......
    Teach the apprentices right... and learn from their questions and ideas.

  5. #5
    Join Date
    Jul 2003
    Posts
    172
    Crankcase heat

  6. #6
    Join Date
    May 2004
    Posts
    1,308
    ummmm..... sorry Joker, you can have crank case heat with a two pole, one pole or three pole....

    Don't mind me... it's the meds...

    but how is that a potential reason? This old dog can learn new tricks....

    Teach the apprentices right... and learn from their questions and ideas.

  7. #7
    Join Date
    Feb 2005
    Location
    Dothan, Al
    Posts
    3,453
    Am dissapointed in the lack of response, Oh well

    Joker is right - one pole contactor used due to compressor winding used as crankcase htr.

    Thanks all for yur response

    Richard

  8. #8
    Join Date
    Feb 2005
    Location
    Barrie, Ontario
    Posts
    4,622
    Originally posted by bornriding
    Am dissapointed in the lack of response, Oh well

    Joker is right - one pole contactor used due to compressor winding used as crankcase htr.

    Thanks all for yur response

    Richard
    I'm always the late guy...

    If I may add, I understood it started as a crankcase heater, trickle power through the start winding using the capacitor like a resistor (Did they have to have bleed resistors?)to warm the compressor up. But the contactors stuck for another reason...Cost. Not too many manufacturers use the start winding heater theory anymore if any. Modern caps and windings probably can't take it.

    I always thought it interesting that some older Carrier 3ph units used a 2 pole compressor contactor and wired the 3rd direct...not for the same reason as above of course. I always thought it was kind of dangerous and stupidly cheap.
    Is this a Fabreze moment? C.Y.D. I'm voting white elephant. 2.
    My competition are my best salespeople!

  9. #9
    Join Date
    Feb 2004
    Location
    New Mexico
    Posts
    5,462
    Those things kill people.
    Tracers work both ways.

  10. #10
    Join Date
    May 2001
    Location
    Bennington, Vermont U.S.A.
    Posts
    13,864
    I don't get it.

    and

    Two. Marylyn Roth was President of Syracuse RSES a number of years ago.

  11. #11
    Join Date
    May 2001
    Location
    Bennington, Vermont U.S.A.
    Posts
    13,864
    I don't get it-------if you are using one leg of the power for a "trickle charge" where is the completed circuit.

  12. #12
    Join Date
    Jun 2003
    Location
    Jacksonville, FL.
    Posts
    4,313
    On older systems they wire the CCH to both sides of the buss bar on single-pole contactors thereby making a complete circuit.

    I still don't understand how that's supposed to work....
    WHY?

  13. #13
    Join Date
    May 2004
    Posts
    1,308
    Been around a few years, I'm wracking the single brain cell left... maybe Bornriding can explain the exact science of that.... or mayby NormChris...

    Support the claim, just don't repeat it.... I'm listening.

    Teach the apprentices right... and learn from their questions and ideas.

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