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Thread: Trane RTAA080

  1. #1
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    Trane RTAA080

    Repared another chiller earlier this week for a critical building with no back-up chiller. It had an SEO-70 EXV go bad on circuit A. Since they don't make the old ones anymore, I had to order a SEHI-100, two of them, and a EXV module. Those parts came in but we were waiting on two sets of 35 foot cable for the EXV's Trane said we needed as well. I looked it up and read the cables should have between 70-75 ohms of resistance while hooked up to EXV, when checking each of the two windings. The old cables hook up exactly to the new EXV's but I had to change the wire arrangment that connects to the module. I had 76ohms on one and 77ohms on the other. Chiller has been running like a champ. But when the cables did come in, I noticed that they were a bit different where it clips into the EXV connector. Not much, and to me I really don't think it does matter. It is probably a stupid question but I was wanting to know if anyone has any information on this and if indeed it may have some sort of long term problem that may show up or cause damge to EXV down the road.

  2. #2
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    you now have a couple of new and unused cables. i have 2 unused cables too. i have had them for about 2 years now.
    my 1st time jumping out of a plane...http://youtu.be/Kv38G0MHsGo

  3. #3
    Join Date
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    If you do decide to install them, please take the time to remove the old cables. Don't just zip tie the new cables to the old ones! Same goes for temperature sensors...
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  4. #4
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    Quote Originally Posted by BergerMech Rob View Post
    If you do decide to install them, please take the time to remove the old cables. Don't just zip tie the new cables to the old ones! Same goes for temperature sensors...
    No kidding, I hate seeing cables just laying across everything underneath there. I guess no difference in the cables, just Trane trying to make some extra bucks? LOL Good news at least, thanks.

  5. #5
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    Quote Originally Posted by Cowpoke View Post
    No kidding, I hate seeing cables just laying across everything underneath there. I guess no difference in the cables, just Trane trying to make some extra bucks? LOL Good news at least, thanks.
    second that motion on the old cables!

    since tranes kit is a retrofit, they are just supplying eveything needed for every possible situation.
    my 1st time jumping out of a plane...http://youtu.be/Kv38G0MHsGo

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