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mystery discharge

Discussion in 'Technical Discussion' started by CTdave, Jul 5, 2012.

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  1. CTdave

    CTdave Senior Member

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    And I'm not talking in the head....
    Last night at the fireworks, I heard a major discharge from the engine room which lasted 10-15 seconds.
    Immediate thought was Halon. After waiting 10 minutes, I looked in the engine room & saw a hazy smoke like mist in the air. Again, I thought halon.
    After a 20 minute inspection to see what might have caused a discharge, all seemed well so we headed in.
    Upon further inspection, the halon system did not discharge & is fully charged.

    This brings up another thought. I have just had two out of three air conditioning compressors/condensers go down. The a/c guy was there two days ago & gave me the terminal diagnosis. In a lame attempt to "free up" the stuck compressors yesterday, I whacked them with a 2"x4" (more due to frustration).

    Question: Does it sound like a Cruisair compressor discharging? It was a smell that I had never experienced before. What does this gas smell like?

    I'll post another thread about replacements for the cruisair but I need help locating replacements asap

    Thanks
    David
  2. K1W1

    K1W1 Senior Member

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    Hi,

    If it were refrigerant in a high enough concentration and you entered the space where the plant was you would probably feel woozy. My exposure to it has left me with the impression it is a kind of sickly sweet and chemical taste ( Freon 12 and 24)

    Look all over your AC system, if there was a major gas escape there will be Oil traces around where it escaped from.

    Whacking the compressor with a 2 x 4 will not do much to it if it is actually seized from inaction.
  3. CTdave

    CTdave Senior Member

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    :eek: I know, I know LOL. After the terminal diagnosis, I was frustrated. Do you know how many things I've "fixed" by giving them a good whack?:rolleyes:

    I didn't go into the engine room till things had cleared up quite a bit but I did get a slight "woozy" feeling ( wasn't drinking at all). I'll start hunting for an oily tell tale.
  4. CTdave

    CTdave Senior Member

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    Yep, I would describe it as a sweet yet almost sulfuric smell/taste.
  5. K1W1

    K1W1 Senior Member

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    Hi,

    Probably a similar number to me, especially starter motors.

    I wasn't saying it is a bad technique as such. It is a good way to de stress yourself whilst not doing much to free the jammed gear.

    The most important thing to figure out is why the compressors froze, one I can understand but two at the same time kind of leads to a common fault.

    How are the condensers? By this I mean have they been pressure tested?

    It is possible while the system was stopped water got in and then got pumped around when the system first started causing a lock of the compressors.(Hydraulicing)?
  6. CTdave

    CTdave Senior Member

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    LOL, I hear ya!


    Yes, they were tested "A-ok" two days ago.


    Very good possibility (hydro) !'m Looking into the cause now as well as trying to find replacements.

    I did a little searching on the net & have found many similar descriptions of the "freon smell. Exactly what I experienced.
  7. MBevins

    MBevins Senior Member

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    Just so your aware you can replace just the compressor unit itself without havinig to go through Cruise aire. They are generic compressors brand labelled. Any residential/commercial a/c guy can buy it at the wholesaler and replace it. If you go the "marine" route they want to replace everything at double or triple the price.
  8. K1W1

    K1W1 Senior Member

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    Hi,

    I made a typo in a previous post, It should have read Freon 12 and 22.

    As far as I am aware there was never a commercially available refrigerant called Freon 24
  9. K1W1

    K1W1 Senior Member

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    Hi,

    That is a given but what anyone who has had such a major failure of the system needs to do before fitting new parts is work out why the old ones failed.

    A fridge Compressor is a pretty reliable and robust thing, for two to fail suddenly tends to lead to an outside force being involved not just a dodgy compressor unless they have consecutive serial numbers and were made on the same Friday afternoon/Monday Morning :)
  10. MBevins

    MBevins Senior Member

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    I would agree with you fully. I'm simply stating that at the end of the day these are all generic units made by 2-3 manufactures and brand labeled with their own controls.
  11. RT46

    RT46 Senior Member

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    i was once chipping ice out of one of those small fridge with the ice box inside the fridge compartment.

    i was using a knife or something and i put a hole in that ice box part and got a face full of gas and a gas discharge sound like the one described.

    it smelled very different and i did feel a bit woozy for a while.

    I earned the Darwin Award that day.

    and paid $800 for a new fridge.

    btw sometimes that the 2x4 method does work....
  12. CaptPKilbride

    CaptPKilbride Senior Member

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    refrigeration guy

    Dave if you ever need a second opinion I use a guy in Mamaroneck whom I highly recommend.
  13. Marmot

    Marmot Senior Member

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    I don't want to play "Chicken Little" here but if the evaporator blew out make sure you check the chill water loop for oil contamination. If the boat uses any plastic piping in the loop the oil can lead to a chain of fitting failures.

    If there is any refrigeration oil at all in the loop and you have plastic fittings, discuss the event with your insurance rep. I had a similar incident a few years ago that created a huge repair problem. It is not just the oil but the loop pressure took a huge high pressure spike when the evaporator line blew out, this lead to stress cracking that allowed rapid attack by the chemicals in the oil.

    If you are lucky it was just a hermetic seal where a power lead enters the compressor can. You should be able to see oil someplace on the unit. If it made it to the atmosphere like you said then there will be oil showing where it escaped the system.
  14. Capt Ralph

    Capt Ralph Senior Member

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    Do your condensers share the same raw water inlet? Same raw water pump?
    Older compressors may not have a high pressure cut off switch. Even more, they are removed or bypassed for servicing, it may use the only high pressure service nipple.
    Two sudden failures, usually induced buy a common incident.

    And yes, 2x4, block & hammer or mallet sometimes does work.
  15. CTdave

    CTdave Senior Member

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    Oh yes! The two people I have called from upper CT are in no hurry to get anything done.

    Thanks!
    DD
  16. CTdave

    CTdave Senior Member

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    Yes, all three units share the same pump.

    It wasn't actually a sudden failure of the two systems in question.
    Master state room: working fine.
    Salon: showed signs of something going wrong last year.
    Guest: working fine last year. No go from day one this season.
  17. CaptPKilbride

    CaptPKilbride Senior Member

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    Martin Brekne
    Oceanair, Inc.
    914-381-3023

    I have used him the last 20 years, excellent guy.
  18. CTdave

    CTdave Senior Member

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    I'll post all of the numbers in a moment

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  19. CTdave

    CTdave Senior Member

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    Control for 12,000 btu salon

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  20. K1W1

    K1W1 Senior Member

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    Hi,

    I wouldn't worry about that last photo.

    We are using a black version of that that doesn't have the Marineair Symbol on it for the ECR AC on a boat less than 12 months old.