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  1. #1

    Increased life on compressor....?

    Been in the biz for 10+ years, I am installing a new R410A for my own house would putting a liquid solenoid on and letting it go into pumpdown mode when the thermostat satisfies would allow the compressor an easier time on startup thus allowing for less wear and tear on the compressor? Or would installing a crankcase regulator on the suction line be a better way?

    It's a Copeland Scroll compressor, I forgot if did or didn't matter if the scroll is under equalized pressures it would startup the same. That scroll would startup the same whether equalized or not.


    Thanks for your input!

  2. #2
    Join Date
    Sep 2002
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    12,459

    Tell me why you think these things will be an improvement

    Because it sure seems to me that both would do the opposite of your claimed intention.


    PHM
    -------------


    Quote Originally Posted by bubbahotemp View Post
    Been in the biz for 10+ years, I am installing a new R410A for my own house would putting a liquid solenoid on and letting it go into pumpdown mode when the thermostat satisfies would allow the compressor an easier time on startup thus allowing for less wear and tear on the compressor? Or would installing a crankcase regulator on the suction line be a better way?

    It's a Copeland Scroll compressor, I forgot if did or didn't matter if the scroll is under equalized pressures it would startup the same. That scroll would startup the same whether equalized or not.


    Thanks for your input!
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  3. #3
    Join Date
    Jul 2008
    Location
    Yorkville Illinois
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    1
    I don't feel either application will prolong the life of your compressor. The suction regulator is designed to regulate in a multiple evaporator application. Making the system pump down is to keep liquid from migrating back to the compressor causing slugging. I dont feel in a residential application that would apply. A crankcase heater will protect from this migration in your application.

  4. #4
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    You don't need to add any of that stuff.

    Just like a comprssor in a refrigeration system. Long run cycles prolong the life of the compressor of an A/C system.
    So don't oversize your A/C.
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  5. #5
    Join Date
    Sep 2002
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    12,459

    If you want to increase the life of your compressor add HGBP

    Do not use a cooling thermostat and set the hot gas bypass valve for the space temperature you want. You will have to fidle with it at first but just set it lower to reduce the house temp or higher to increase the space temp. When you get it balanced - just leave it there forever.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  6. #6
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    Just install it as per the install instructions.
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  7. #7
    Join Date
    Jul 2006
    Location
    Virginia
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    if it does not have a crank case heater you can add one but the easy way to prolong the compressor is a proper install proper charge and service it annully

  8. #8
    Join Date
    Dec 2006
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    Middle Tennessee
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    *

    Quote Originally Posted by Poodle Head Mikey View Post
    Do not use a cooling thermostat and set the hot gas bypass valve for the space temperature you want. You will have to fidle with it at first but just set it lower to reduce the house temp or higher to increase the space temp. When you get it balanced - just leave it there forever.





    .

  9. #9
    Join Date
    Jan 2004
    Location
    Northen West By God Virginia
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    Smile

    Why not install a AMANA 14 SEER with life time compressor warranty and not do anything but relax!

  10. #10
    Join Date
    Feb 2008
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    Western NC
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    Quote Originally Posted by webbheat View Post
    Why not install a AMANA 14 SEER with life time compressor warranty and not do anything but relax!
    Cause he don't want a glorified Goodman
    I fully support the military and the War on Terrorism.


    If you don't know, then don't do. If you don't know and still do, then be prepared to pay someone else a lot to undo what you did and then do it right.

    If you do know, then do. But do it right. Otherwise, you may not be doing it long.

  11. #11

    Compressor life

    Thanks for replies, anyway thanks for the info on crankcase heater, I know most techs hate Goodman except home builders, but I got a good deal on it, I know shame on me, but it is a 14 seer. Other brands were 2X the price. I was told that a compressor has a easier time starting on a suction pressure that is lower than the equalized pressure on startup I sometimes like to Over-Engineer it, but probably I'm wasting my time.

    I'll probably just throw on a Heater and be done with it.

    Thanks everyone,

  12. #12
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    Dec 2007
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    Actually compressors start easier with balanced pressure. And It seems to me that a scroll would allow the pressures to equalize since they don't have valves, making the solenoid useless anyway.

  13. #13
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    Quote Originally Posted by Coolmaniac View Post
    Actually compressors start easier with balanced pressure. And It seems to me that a scroll would allow the pressures to equalize since they don't have valves, making the solenoid useless anyway.
    The old ones did. Thats why they would spin backwards after shutting off.
    Since they have a check valve now, they don't equalize if you have a SV, or balance post TXV.
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