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#5229 - 11/27/12 01:52 PM
'60s-vintage Otis--Modernize?
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Joined: Nov 2012
Posts: 9
BoredMember
stranger
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stranger
Joined: Nov 2012
Posts: 9
Northeastern U.S.
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Hello all. I hope this is the correct forum for this post. It's not highly technical, but I couldn't find a better option.
I am not a technician, but a condo-board officer with a decision to make. My 11-storey (plus two below-grade floors) building is served by 2 '60s-vintage Otis elevators. The local Otis rep says they're in good shape for their age but are well beyond their expected lifetime. One of them has been experiencing frequent outages, and the most recent has lasted several weeks, since a part needed to rebuild the DC generator isn't available.
The condo board is considering "modernization". Given the age of the elevators, that's certainly the safe recommendation. But I'm not yet completely convinced because I'm a lover of old mechanical things and I can't think of anything mechanical made today that's superior to what was made back then. (Electronics yes, but mechanical? No.) And I have encountered the opinion, online, that "modernization" is in fact the replacement of great old mechanical parts with inferior newer ones.
The only way I can think of to get at the truth is to talk to people who 1. work with these things every day, and 2. don't stand to profit from a decision to "modernize".
So I'm asking you, elevator mechanics: What is the truth, and what should we do? Will "modernized" elevators be an actual improvement? Is there a different course--replacement of the generator maybe, with a rebuilt model, or whatever--that would make more sense?
Thanks,
Bored Member
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#5236 - 11/28/12 05:13 AM
Re: '60s-vintage Otis--Modernize?
[Re: GreenPants]
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Joined: Oct 2009
Posts: 404
Scott Davidson
troubleshooter1
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troubleshooter1
Joined: Oct 2009
Posts: 404
california
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Im with the other guys on this one, if your going to modernize, and are going to choose one of the 4 main guys, Otis, Thyssen, Kone, and Schindler all of which will have proprietary equipment that will make it harder for anyone else to service, I would go the otis route. We have quite a few in service, and they are indeed very reliable. I would stay away from the Schindler and Kone product. Thyssen would be my second choice. Just remember they all make it hard for any other company to service and repair their equipment, this could be problematic in the future. There are a few good non-proprietary elevator controllers on the market that most elevator men can fix, Motion control, Elevator controls etc. They are a little cheaper. We have also had many of these cars in service, and in my opinion are fairly reliable as well, especially in a moderate usage building such as a condo.
one thing that bothers me in your post is the statement that they can not find a "part" to rebuild the generator. What part are they talking about? Sounds to me like the usual, hold the customer hostage with no elevator for a couple of weeks, to eek a modernization out of them. unfortunately i have Seen it more times then i would like to admit. what state are you in
Last edited by Scott Davidson; 11/28/12 05:22 AM.
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#5244 - 11/29/12 03:03 AM
Re: '60s-vintage Otis--Modernize?
[Re: Scott Davidson]
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Joined: Aug 2012
Posts: 132
elevatedone
member
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member
Joined: Aug 2012
Posts: 132
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Im with the other guys on this one, if your going to modernize, and are going to choose one of the 4 main guys, Otis, Thyssen, Kone, and Schindler all of which will have proprietary equipment that will make it harder for anyone else to service, I would go the otis route. We have quite a few in service, and they are indeed very reliable. I would stay away from the Schindler and Kone product. Thyssen would be my second choice. Just remember they all make it hard for any other company to service and repair their equipment, this could be problematic in the future. There are a few good non-proprietary elevator controllers on the market that most elevator men can fix, Motion control, Elevator controls etc. They are a little cheaper. We have also had many of these cars in service, and in my opinion are fairly reliable as well, especially in a moderate usage building such as a condo.
one thing that bothers me in your post is the statement that they can not find a "part" to rebuild the generator. What part are they talking about? Sounds to me like the usual, hold the customer hostage with no elevator for a couple of weeks, to eek a modernization out of them. unfortunately i have Seen it more times then i would like to admit. what state are you in Yes,that part bothered me also,about can't get the part for the generator. That is a bunch of bullshit. They can be repaired,you can still get brushes and brush riggings for them. Sounds like they either don't want to spend the money on it our they are short of manpower.
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#5251 - 11/29/12 04:54 AM
Re: '60s-vintage Otis--Modernize?
[Re: BoredMember]
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Joined: Aug 2012
Posts: 132
elevatedone
member
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member
Joined: Aug 2012
Posts: 132
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Non -proprietary means any company can work on it ,not just and only one.
Think of it this way. Someone installs something in your house. The only one who can fix it is the one's who installed it. So you are stuck with that company. Then say that company wants to charge you more money then the others,but the others can not properly troubleshoot the unit. You are then caught in the net of that company and their prices.
The big four is a farce.They are all the same,cutting back people,putting out crappy equipment. I'm sorry,but I'm going on a rant. And then they design certain fixtures and such to fail,blaming it on abuse when it's not. So they charge the customer to upgrade to vandal proof fixtures,meaning hall buttons and car buttons.
26 years in the biz,and going downhill quick. The guys,the techs,are of great quality,it's just the companies holding us back from doing our jobs.Overloading us til we break.
I will stop my rant now and move on.
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#5255 - 11/29/12 02:49 PM
Re: '60s-vintage Otis--Modernize?
[Re: uppo72]
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Joined: Nov 2012
Posts: 9
BoredMember
stranger
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stranger
Joined: Nov 2012
Posts: 9
Northeastern U.S.
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Hello all--once again, thanks for the excellent advice. If I can get the other bored members (yes, I do know how to spell 'board'; it's a joke) to go along, I certainly will follow it. But I've got a long way to go to get up to speed, so I have a couple of followup questions still.
jkh wrote: >>We are speaking of the control portion of the elevator modernization.<<
Apparently, our big problem lately has been with the A/C generator. It requires a rebuild and a specific part--an armature I believe--was very difficult to source. Apparently there was just one in the warehouse before Sandy hit, and even though our elevator had been out of service for more than a week at that time, the order didn't get placed until after the storm and that part had already been claimed. (The replacement part was due in yesterday; assuming it came in as scheduled, Otis will rebuild that generator today and tomrrow.)
* So that leads to my first followup question: Can we expect good service from a fully rebuilt generator? Or should we go ahead and replace it with a DC model?
* Next: jkh wrote >>we are speaking of the control portion of the elevator modernization<< So, if I understand, there is generic, non-proprietary control systems that can be plugged in to an Otis elevator, they're a little cheaper, they work great, there are companies around that will install them, and then you're not locked in to expensive, proprietary equipment and repairs by Otis or the other big-4.
Do I have that right?
* What about the generator? Will that be an Otis product, or are there generic versions of this as well?
You guys are great. Amazing resourc.e Thanks again!
Bored Member
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#5258 - 11/29/12 06:27 PM
Re: '60s-vintage Otis--Modernize?
[Re: BoredMember]
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Joined: Jan 2012
Posts: 885
jkh
4 Ever Learning.
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4 Ever Learning.
Joined: Jan 2012
Posts: 885
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BM Generators such as the one currently being used is a dated method of using AC power from your building and converting it to DC power. There are alternatives to generators that supply DC power to modern controllers that feed your current hoist machine. Or your current hoist may be fitted with a VVVF hoist motor that uses AC power. The condition of your hoist machines will influence that decision. Here is a link to an article you may find interesting; http://www.elevatorworld.com/magazine/elevator-modernization-condominio/
Make good choices,
JKH
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#5262 - 11/29/12 11:37 PM
Re: '60s-vintage Otis--Modernize?
[Re: jkh]
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Joined: Aug 2011
Posts: 563
uppo72
addict
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addict
Joined: Aug 2011
Posts: 563
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BM Generators such as the one currently being used is a dated method of using AC power from your building and converting it to DC power. There are alternatives to generators that supply DC power to modern controllers that feed your current hoist machine. Or your current hoist may be fitted with a VVVF hoist motor that uses AC power. The condition of your hoist machines will influence that decision. Here is a link to an article you may find interesting; http://www.elevatorworld.com/magazine/elevator-modernization-condominio/ jkh we almost exclusively use mp lifts for all our new/mod apllications but they now provide a serial data type control of which you need a test tool.
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#5263 - 11/29/12 11:47 PM
Re: '60s-vintage Otis--Modernize?
[Re: BoredMember]
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Joined: Aug 2011
Posts: 563
uppo72
addict
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addict
Joined: Aug 2011
Posts: 563
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Hello all--once again, thanks for the excellent advice. If I can get the other bored members (yes, I do know how to spell 'board'; it's a joke) to go along, I certainly will follow it. But I've got a long way to go to get up to speed, so I have a couple of followup questions still.
jkh wrote: >>We are speaking of the control portion of the elevator modernization.<<
Apparently, our big problem lately has been with the A/C generator. It requires a rebuild and a specific part--an armature I believe--was very difficult to source. Apparently there was just one in the warehouse before Sandy hit, and even though our elevator had been out of service for more than a week at that time, the order didn't get placed until after the storm and that part had already been claimed. (The replacement part was due in yesterday; assuming it came in as scheduled, Otis will rebuild that generator today and tomrrow.)
* So that leads to my first followup question: Can we expect good service from a fully rebuilt generator? Or should we go ahead and replace it with a DC model?
* Next: jkh wrote >>we are speaking of the control portion of the elevator modernization<< So, if I understand, there is generic, non-proprietary control systems that can be plugged in to an Otis elevator, they're a little cheaper, they work great, there are companies around that will install them, and then you're not locked in to expensive, proprietary equipment and repairs by Otis or the other big-4.
Do I have that right?
* What about the generator? Will that be an Otis product, or are there generic versions of this as well?
You guys are great. Amazing resourc.e Thanks again!
Bored Member BM, if you are having commutator problems it would mean your whole armature needs replacing. you can get a good result from this repair however probably very costly. the thing is you have to make the decision on whether you think other than the generator the lifts have been pretty reliable. its all about projecting when and if the lift failures become so prevelant that you have to constantly repair them and this means costs and down time. chicken or the egg scenario. if you modernise the lifts you know you will have the spares close by and for a reasonable long time but you cant know this regarding the old existing lifts. the control we talk about means the existing controllers are completely removed and the lift is rewired completely and is not just plugged in to existing elevator controls. think of it as a new lift but most of the mechanical stuff is reused.to get a better understanding it might be an idea to speak to otis and get them to take you too a mod job.
Last edited by uppo72; 11/29/12 11:50 PM.
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