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  1. #14
    Join Date
    Dec 2009
    Location
    Southern US
    Posts
    504
    Ah what will we all do when all the AA's have passed into the twilight now that Trane has moved on to AC's! It's fun to watch or at least read these responses!

    And I have learned alot reading them between the laughs!!
    I'm good at making things cold...You can ask my first two wives!

  2. #15
    Join Date
    Nov 2011
    Location
    South Texas
    Posts
    60
    Washed the condenser last night it definitely was way dirtier than it ever looked. The switches tested out when I checked their calibration. The machine ran perfect through the night and all day today. Maybe I got lucky we'll see how it does over the next few days.

    The x number on the switch is x1324004040.

  3. #16
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    1,989
    Quote Originally Posted by BKS60 View Post
    Ah what will we all do when all the AA's have passed into the twilight now that Trane has moved on to AC's! It's fun to watch or at least read these responses!

    And I have learned alot reading them between the laughs!!
    Not to worry, BKS. The "entertainment value" of the CGAM on this site looks promising!

  4. #17
    Join Date
    Dec 2009
    Location
    Southern US
    Posts
    504
    Good point!
    How many techview questions will it take to before our northern Trane guru has to take his green machine out in December with the top down to cool off.

    I'm good at making things cold...You can ask my first two wives!

  5. #18
    Join Date
    Mar 2004
    Location
    ottawa canada
    Posts
    2,011
    Quote Originally Posted by BKS60 View Post
    Good point!
    How many techview questions will it take to before our northern Trane guru has to take his green machine out in December with the top down to cool off.

    The Green Machine will be tucked up and sleeping come December ...........so I'll just have to drop my shorts and plonk my ass in a snowbank instead ...........probably have the same numbing effect !!!!!!!!!
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  6. #19
    Join Date
    Dec 2009
    Location
    Southern US
    Posts
    504
    Quote Originally Posted by graham View Post
    The Green Machine will be tucked up and sleeping come December ...........so I'll just have to drop my shorts and plonk my ass in a snowbank instead ...........probably have the same numbing effect !!!!!!!!!


    Keeper safe she's a good lookin ride!
    I'm good at making things cold...You can ask my first two wives!

  7. #20
    Join Date
    Nov 2011
    Location
    South Texas
    Posts
    60
    So far so good today had a few VAV boxes to work on and she ran like a top all day.

  8. #21
    Join Date
    Nov 2011
    Location
    South Texas
    Posts
    60
    It got pretty cold here last night mid to low 30's and at some point in the night both circuits tripped out on low oil flow. I check over everything one more time today and it is running like a top and all of the specs look normal. Does anyone have any idea what this thing could be doing when it gets cold outside to cause this.

    Thanks

  9. #22
    Join Date
    Nov 2011
    Location
    South Texas
    Posts
    60
    I just thought of one possibility. The building this is in is largely unoccupied and is holding the chilled water at 42 degrees with ease and there is very little load on this unit in cool weather and today it's 65 degrees outside and it will run 5-15 minutes and be off for another 10-15 and is able to get by running one compressor at 40% load on the average and hold the building absolutely perfect. this chiller supplies cooling for multiple buildings and unless there is an activity slated very seldom are all zones calling. Today it pretty much is cooling some offices and a large entry area.

    During the summer it can hold the building perfectly with one circuit running and all zones calling in 112 degree weather and still hold about 50-55 degree water.

    Could the short run times and long off cycle during the night be causing this and if so where to look.
    Thanks

  10. #23
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    4,258
    the number 1 cause of oil pressure trips is dirty condensers. the higher head pressure pushes the oil through the oil filter, piping and solenoids faster than normal and this causes the higher pressure drop which trips the unit.

    you may still have a similar issue. perhaps the outdoor air temperature sensor is faulty or sometimes flaking out (it is used for pre-staging the fans). if it sees lower outdoor air temperatures than actual, then it may not be bringing on enough fans fast enough.

    also check your saturated condenser and evaporator temperature sensors for accuracy. these are used to control the fans after start up. also, check to make sure that the fan contactors are wired properly. perhaps fewer contactors are coming on when the unit thinks/expects they are.
    my 1st time jumping out of a plane...http://youtu.be/Kv38G0MHsGo

  11. #24
    Join Date
    Nov 2011
    Location
    South Texas
    Posts
    60
    I used a pressure washer to clean the condenser I washed it from both sides inside and out and got a ton of dirt out of it. I especially washed the oil cooler areas real close.

    If it is a fan staging issue or a temp sensor going wacky will it make her start tripping on a low oil flow code before the head pressure is high enough to knock it out on high head. It just blows my mind that the friggin volume could get high enough through the filtration system before it ever trips out on high head.

  12. #25
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,609
    Quote Originally Posted by aggiechillertech View Post
    If it is a fan staging issue or a temp sensor going wacky will it make her start tripping on a low oil flow code before the head pressure is high enough to knock it out on high head.
    Yes

  13. #26
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    4,258
    Quote Originally Posted by aggiechillertech View Post
    ...It just blows my mind that the friggin volume could get high enough through the filtration system before it ever trips out on high head.
    i do not know if that is a by-product of design or if trane intended it to be that way on purpose as a back up safety. it is probably a by-product of design, however, oil flow issues usually trip the chiller before high pressure safeties trip.
    my 1st time jumping out of a plane...http://youtu.be/Kv38G0MHsGo

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