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  1. #1
    Join Date
    Sep 2004
    Posts
    523

    Failed muffler on O6D compressor?

    Can someone tell me how to determine if you have a bad muffler on a recip. compressor?

  2. #2
    Join Date
    Feb 2004
    Location
    Georgia
    Posts
    374
    Well, short of taking it off and examining it there would be no positive way.
    But if you had some problems like say cracked discharge lines or excessive gas pulsation type noise in the piping and maybe found some metal debris in the liquid line drier then you might have a bad muffler among other things.

  3. #3
    Join Date
    May 2001
    Location
    Western Wa
    Posts
    1,864

    Talking One way I knew...

    ..was when a piece of discharge valve vibrated its way through the can.

    That was about 6 months after I replaced the valves.
    God Bless our Veterans

    God Bless the USA

  4. #4
    Join Date
    Aug 2000
    Location
    USA
    Posts
    4,995
    Only failures Ive seen where cracks at the stubs into the shell of the muffler, or plugged up with debris and having a high pressure drop.
    Your poor planning does not constitute an emergency on my part!!!!

  5. #5
    Join Date
    Jun 2003
    Location
    in a tree looking in your window
    Posts
    1,175
    Couple of years ago one of my guys calls me and says he thinks he has a bad muffler on a Carrier chiller, compressor trips on high head after a few seconds, here is what I found.

    If you dont stand behind our troops, please feel free...........to stand in front of them.

  6. #6
    Join Date
    Oct 2003
    Location
    UTAH
    Posts
    145
    Quote Originally Posted by chillrdude View Post
    Couple of years ago one of my guys calls me and says he thinks he has a bad muffler on a Carrier chiller, compressor trips on high head after a few seconds, here is what I found.



    Nice...ever find the clip?

  7. #7
    Join Date
    Apr 2012
    Location
    Paper Street Soap Company
    Posts
    2,304
    Quote Originally Posted by chillrdude View Post
    Couple of years ago one of my guys calls me and says he thinks he has a bad muffler on a Carrier chiller, compressor trips on high head after a few seconds, here is what I found.



    Too bad it happened on the high side. Had to reclaim it didn't you.

    Ive had that happen but on the suction side 3 times but I see ALOT of 06 comps.

    Have 4 data centers filled with 30 ton Lieberts and 2 data center in Dallas. 23 Lieberts in each data centers with two comps each.

    Plus have some old Carrier 40 ton Condensing units with 06Es in them.

    I blame those foe my back problems.

  8. #8
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,928

  9. #9
    Join Date
    Apr 2012
    Location
    Paper Street Soap Company
    Posts
    2,304
    Your'e wasting your time.

    Does that unit have a big slab condenser coil ?

    If it does they're notorious for poor heat transfer when they start getting corroded.

    Put a water hose on it while its running. Does your head and liquid pressure close up ? Then no discharge restriction.

  10. #10
    Join Date
    Jul 2007
    Location
    The Hot South
    Posts
    1,369
    If he's got a 190# pressure drop between the hot gas Line and liquid line, then he's got a restriction somewhere. Putting water on the coil's not going to help.

  11. #11
    Join Date
    Apr 2012
    Location
    Paper Street Soap Company
    Posts
    2,304
    Im NOT speaking from inexperience. Ive been through that same scenario more than once on those Carrier RTUs with the flat condenseor coils and the 06D comps.

    He'll tear it apart or isolate the coil and find ZERO restriction.

    Lost count on how mamy Carrier RTUs Ive worked on in the last 20 years.

    The hose test just confirms that coil is junk. If its a discharge restriction where would it be ? In the 1 1/8 discharge line coming off the comp ?

    The 5/8 header ? Seriously ?

    If its a restriction a large differential will remain. when you put a hose on it right ?

    It doesnt, the pressures will almost equalize. Its a test.

    And why to discharge restrictions only happen on Carrier RTUs ?

    They dont.

    But they do have crap coils where the aluminum fins turn to dust way roo soon.

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