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  1. #40
    Join Date
    Jul 2010
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    53
    Evaporator coil

  2. #41
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,664
    Quote Originally Posted by 02powerstroke View Post
    Evaporator coil
    wrong, be more specific.
    It's hard to stop a Trane. but I have made one helluva living keeping them going.

  3. #42
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,787
    Quote Originally Posted by 02powerstroke View Post
    Evaporator coil
    Again, I think you're overthinking.

    The TXV requires a solid column of liquid to meter properly.


    If it doesn't get that solid column of liquid, it does more than just lose capacity. If the column has enough vapor in it, the valve can't regulate and can cause high suction even though very little cooling is being done.

  4. #43
    Join Date
    Jul 2010
    Posts
    53
    Thanks again for all the insight... I'm just getting started but plan on learning from this page as a great resource. I'll add some refrigerant and see how the unit performance changes.

  5. #44
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,664
    Quote Originally Posted by 02powerstroke View Post
    Thanks again for all the insight... I'm just getting started but plan on learning from this page as a great resource. I'll add some refrigerant and see how the unit performance changes.
    just for learning purposes, and it will not take that much longer, but recover charge and weigh, no need to pull vacurme or add dryer is system not open, then recharge with recovered charge and any additional over and above to what mfg reccomends. And usually its x amount for up to 15' lineset then certain amount for ea addl foot. I am not big on just adding gas on a system I have never worked on before.
    It's hard to stop a Trane. but I have made one helluva living keeping them going.

  6. #45
    Join Date
    Jul 2010
    Posts
    53
    sounds good... I will do that... thanks for the recommendation

  7. #46
    Join Date
    Jul 2010
    Posts
    53
    well... new twist to the story... the condensing unit fan is now stationary and the liquid line is very hot... what are the chances that the condensing unit fan locked up... its late now here and its dark out so the solution will have be implemented tomorrow... We did have some large lightening storms and heavy rains.... possibility that had something to do with it failing? Seems too coincidental almost

    Keep in mind I hadn't recovered any refrigerant or charged teh system up again... it was left as it was from the most recent readings
    Last edited by 02powerstroke; 09-02-2011 at 11:24 PM.

  8. #47
    Join Date
    Jul 2002
    Location
    Yuma, AZ
    Posts
    2,361
    If you have the old analog gauges, instead of reading pressure read the refrigerant saturation temperature where the needle crosses the R22 ring of numbers around the dial. That makes it far easier to calculate SH and SC.

    Using saturation temperatures makes moving from one refrigerant to another painless.
    For any PURE refrigerant
    • The suction gauge tells you the saturation temperature in the evaporator.
    • The head gauge tells you the saturation temperature in the condenser.


    If you have non-condensables in the refrigerant, the high side gauge will read higher than the saturated temperature of the refrigerant when operating, and the low side gauge will read true. That is because the non-condensables get trapped in the condenser by the subcooled liquid refrigerant at the condenser outlet.
    "I have never let my schooling interfere with my education."
    Mark Twain
    More at: http://www.quotationspage.com/subjects/education/

  9. #48
    Join Date
    May 2009
    Posts
    460
    Quote Originally Posted by 02powerstroke View Post
    well... new twist to the story... the condensing unit fan is now stationary and the liquid line is very hot... what are the chances that the condensing unit fan locked up... its late now here and its dark out so the solution will have be implemented tomorrow... We did have some large lightening storms and heavy rains.... possibility that had something to do with it failing? Seems too coincidental almost

    Keep in mind I hadn't recovered any refrigerant or charged teh system up again... it was left as it was from the most recent readings
    That'll do It

  10. #49
    Join Date
    Jul 2010
    Posts
    53
    Yeah, pulled the cap and it's shot... Easy fix

  11. #50
    Join Date
    Jul 2010
    Posts
    53
    its amazing how things happen all at once... THanks again for everyone who responded to the thread

  12. #51
    Join Date
    Sep 2009
    Location
    Arnold mo
    Posts
    3,971
    Quote Originally Posted by 02powerstroke View Post
    Yeah, pulled the cap and it's shot... Easy fix
    Did you check condition of the fan motor? Any side to side wiggle on the shaft? If so, it should be changed out also. Check the contactor while in there? Take amp readings after replacing the cap and compare it to motors specs? Any wiring looking corroded, showing signs of overheating? Double wall condenser coil? A nice thick blanket between them will fool into thinking your charge is correct if it's a fixed metering device.
    An answer without a question is meaningless.
    Information without understanding is useless.
    You can lead a horse to water............
    http://www.mohomeenergyaudits.com

  13. #52
    Join Date
    Jul 2010
    Posts
    53
    Fan motor doesn't have any wiggle... it is aged, but not bad... Has some rust on it...

    Contactor is new, looks to have been replaced recently... I will check it anyway...

    Wiring looks good, no overheating signs... Unit has a TXV... I will check motor amperage after I replace the cap

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