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Thread: Trane CVHF065GA 10 year overhaul

  1. #1
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    Trane CVHF065GA 10 year overhaul

    I've got a Trane CVHF065GA with 125,000 hours on it in my plant that hasn't had it's 10 year overhaul yet. It's making a lot of noise from it's tail bearing. I've ordered the overhaul kit for it but can't take it out of service without bringing in a rental since we're into the triple digits already. What are the odds of it running long enough for the weather to cool down so I can take it offline for the overhaul? It's June in Dallas so there's no telling how long till we get some cool weather. It's on a hospital so if it goes down I'll be hooking up a rental or I'll be on the evening news doing a full evacuation.

  2. #2
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    Tell the bean counters to get the rental chiller in. I’ve worked in several hospitals over the years that have no redundancy. I’ve also worked at several hospitals that are 3X redundant. I’ve never understood why hospitals would even chance it. Clearly this scenario was a possibly in the colder months. Plan accordingly, check with Trane on lead times for parts, shouldn’t be down that long. Not trying to be rude but I wouldn’t want to be a patient at a hospital that doesn’t plan for disasters.


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  3. #3
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    I've got an older CVHE032FA in the back of my plant that's my 3X redundancy. Previous owners planned on replacing it but never did. It's half the size so not quite a full redundancy. I've talked to the bean counters about replacing it with a nice mag bearing model but it didn't seem to go over too well. Instead I'm getting ready to leak check it and put it back online. It's been hibernating for at least 10 years. It would get me by long enough to do the overhaul I'm sure. Besides cost it's going to be a pain getting it through two sets of 80" doors in my plant. They didn't seem to plan on replacing equipment when they built plants in the 80's.

  4. #4
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    no such thing as a time based overhaul. maybe many decades ago that was a thing. today, we have oil and refrigerant analysis, vibration analysis, trending purges, logs, etc.

    as for how long before it goes down, that is up to the chiller. the force isn't with me on this one or my internet connection is flakey.
    "Right" is not the same as "Wise".

    Don't step on my favorite part of the Constitution just to point out your favorite part.

  5. #5
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    I get it, you can only advise on what you think is the best course of action. You seem like you care, that’s half the battle. At a couple different hospitals we converted the chillers to turbocors, not sure if contractors in your area do that but depending on the situation it might be worth a conversation.


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  6. #6
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    My towers are in sad shape as well. They are galvanized Marley's with stainless basins. The wet sections are falling apart and the fill has seen better days. I'd love to drop in some new towers to go with some new chillers but that isn't happening either. It seems that we're either short on beans or they're being miscounted like the last election.

  7. #7
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    That miscount may be the end of all of us

  8. #8
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    Do you guys do everything in house? Why not hire a company that can overhaul the chiller in a reasonable amount of time? Takes the liability off of the hospital as well.


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  9. #9
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    We're 50/50. I've hired a contractor to do the overhaul. Most of the routine maintenance like punching the tubes and cleaning the starters we do in house. I used to work in a facility where we did everything in house including overhauls. Our boss was a former York centrifugal guru from JCI. I learned a lot about York's under his tenure, especially the YK's. I've worked on a lot of chillers over the decades so I know what we can do and what we need to outsource. The challenge for me at the moment is we're into the triple digits and I can't take it down without a rental which is $25k a month. I know it's only a few days for the overhaul but I still need to pay for the setup and the first month regardless. I've decided to roll the dice and bring our hibernating CVHE back online instead of spending money on a rental. I'd rather spend $25k on some R11 and have a working backup chiller when my overhaul is done rather than a rental. Hopefully the planets will align and things will work out for me. With any luck I'll have three working low pressure Trane's before long.

  10. #10
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    Do you have the appropriate tools to replace the tail bearings . You need the special hydraulic nuts and the bearing press .
    If you choose not to use the correct tools then order a second set of bearings so you can do it all over again 6months from now .
    The toy chest is officially full ... I got a new toy..... 2007 Aston Martin V8 Vantage and yes it still gives me goosebumps
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    In the new big shop , greasin', oilin' . tweakin' n shinin' !!

  11. #11
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    No we don't have any specialty tools in this shop at the moment. That's why I said I hired a contractor. The last shop I worked in we had every chiller tool known to man and even some home made ones. It doesn't make sense to fully outfit a shop just to maintain 3 chillers. I do have a rotobrush and software at least. A lot of the tools we use are my personal ones. I only have my guys doing general maintenance on the chillers. None of my crew have ever worked on chillers before besides myself. I have one guy that seems interested in learning but he's starting from scratch and just doesn't get enough practice. I told him to go do an apprenticeship with JCI or Trane then come back and be my chiller guy. The problem is once they leave and join the field it's hard to give up the big money and return to an in house job like this. I'm only able to pay my guys 100k a year so it's hard to compete with the service companies. Usually the guys that take a position like this are older guys that want to become semi retired and slow down. I don't have anyone working for me that's under 50. My oldest is 70. Millennials just don't seem to be joining the trades like we did.

  12. #12
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    What’s so sad is it appears the hospital was well aware of this in the cooler months along with the rotting cooling towers but decided that their HVAC system isn’t important enough. Now they’re in trouble. Completely unavailable. I see this scenario all the time and I have no sympathy.

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  14. #13
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    And just an FYI, the compressor overhaul may take longer than "a few days." Depending on the condition of the machine and potential parts availability etc. I would plan on atleast a few weeks.

  15. #14
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    We're not going to start on the overhaul till all the parts come in. We did the other identical chiller 3 years ago with the same hours on it and it's been running well since. Hopefully this one will go smoothly as well. I'll either have my third chiller back online or a rental on site before we take it offline. I have no sympathy either. I've been asking for cooling towers for over 2 years now. Our previous owner stopped investing money a couple of years before they sold it. Our new owner is yet to invest anything since he's only leasing it. I'm hoping that changes if he actually buys it. The biggest challenge hospitals are facing these days is the nursing shortage. We spend millions a year on agency nurses. The sad part is the middle men make the lion's share as usual. I'd like to see the nurses well paid so they can pay off their houses and cars like the chiller guys. Instead the middle men are buying yachts, spaceships and helicopters as usual. What can we do?

  16. #15
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    In the middle of the night, come in and repipe the bean counters office AC to the oldest and least reliable chiller. Let them know their offices will be curtailed first when you run out of tonnage.

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