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  1. #1
    Join Date
    Jul 2002
    Location
    NorthEast
    Posts
    811
    15 Ton Trane voyager - 2 compressors 7 1/2 Ton each
    8 cube drier on each 3/8 inch liquid line ,installed by others
    After intense condenser cleanings the head pressure will run at 344 P,S,I, with 65 P.S.I. suction

    We were lead to believe that if a liquid line drier is badly restricted you will see moisture on the drier


    Can the driers be adding to the high head pressures

    Will larger driers help

    Thank You

  2. #2
    did you "split " the condensor to clean?
    Don't interrupt me while i'm talking to myself

  3. #3
    Join Date
    Feb 2003
    Location
    Wichita Ks
    Posts
    1,486
    i have had driers with as much as 150lbs pressure drop with out a noticeable temperature drop across it. the only way you will see moisture on it if it is below dew point. first thing would be did you split the coils like gerryboy said? if so and you suspect the drier then go with a bigger one. we had a voyager this summer that a drier plugged up on it and the system was never opened up or had a leak. we did go with a larger drier. also make sure all the orfices are feeding.

  4. #4
    Join Date
    May 2004
    Posts
    1,462
    As stated above you can have large pressure drop and no sweating. Check for pressure drop and temperature drop, neither should be more than 3, 3# or 3f. In my opinion a 8cu in drier is way to small for that system. It may be ok from the factory but any time it is replaced it should be larger.
    If all else fails....Try reading the directions!

    Tell it like it is and let the chips fall where they may.

    Any views or opinions stated here are strictly my own.


  5. #5
    Join Date
    Jul 2004
    Location
    villalba,p,r
    Posts
    170
    that system has stagefans control,you better check if the system,is working step by step.

  6. #6
    Join Date
    Apr 2003
    Location
    Maryville, Tennessee
    Posts
    419
    Originally posted by cleancondenser

    Can the driers be adding to the high head pressures
    The short answer to that question is no, BUT if the LL dryer is restricted someone may have over charged the system to get the back pressure up. Is there more then a 5 degree temp drop on the LL from the condenser outlet to the metering device inlet? If so then you have a LL restriction. .
    -Marty

  7. #7
    Join Date
    Aug 2004
    Posts
    41
    dont think it would be a LL drier causing problem / check cond, fan working properly./ poss restriction at txv or bad powerhead and some overcharged to prevnt icing good luck

  8. #8
    Join Date
    Jun 2004
    Posts
    420
    Isn't an 8ci drier a little on the small side for 7.5 tons?

  9. #9
    Join Date
    Oct 2002
    Posts
    970
    Whats an 8 cube?

  10. #10
    Join Date
    Jul 2002
    Location
    NorthEast
    Posts
    811
    We were hoping for a two peice layered condenser coil.
    This is a one piece coil.
    We did drop the head pressure, on both circuits. from 400 P.S.I. after a good cleaning

    It appears that both compressors were changed a few years back.
    There should be at least a 16 cubic inch drier on each line.
    Trane has hinted that also relocating the driers into the evap
    section
    closer to the metering device will also help.

    Thank you

  11. #11
    Join Date
    Jun 2003
    Posts
    118
    Unless you have hot gas on the systems I would expect to see low suction if the dryer is restricted.
    If you don't have the time to do it right the first time, when will you have the time to do it over?

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