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#32484 - 02/04/22 07:12 PM Otis Machine Type  
Joined: Nov 2010
Posts: 13
dandaman Offline
stranger
dandaman  Offline
stranger

Joined: Nov 2010
Posts: 13
Have never encountered one of these machines before and was curious if anyone had modernized this type of elevator. Magnetek mentioned their VVVF drive would not work due to the Y110 voltage the motors require and I have yet to find replacement motors. They are fed by battery banks.

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#32486 - 02/06/22 02:15 AM Re: Otis Machine Type [Re: dandaman]  
Joined: May 2011
Posts: 330
ABE Offline
Mechanic
ABE  Offline
Mechanic

Joined: May 2011
Posts: 330
I've never seen one only heard the horror stories on that equipment. Does Unitec even sell parts for those machines anymore? I think replacing the whole machine would make the most sense.

#32489 - 02/06/22 01:57 PM Re: Otis Machine Type [Re: dandaman]  
Joined: Dec 2021
Posts: 43
Alex_ELMAN Offline
Miami Elevator
Alex_ELMAN  Offline
Miami Elevator

Joined: Dec 2021
Posts: 43
They are fed by battery bank?! Why?

#32490 - 02/06/22 06:29 PM Re: Otis Machine Type [Re: dandaman]  
Joined: Mar 2016
Posts: 197
lowoil Offline
Elevator guy
lowoil  Offline
Elevator guy

Joined: Mar 2016
Posts: 197
Wisconsin
Mrvf?

#32491 - 02/06/22 07:21 PM Re: Otis Machine Type [Re: dandaman]  
Joined: Feb 2022
Posts: 4
MBE802 Offline
stranger
MBE802  Offline
stranger

Joined: Feb 2022
Posts: 4
Hey guys, new to the group, started my own company but was a prior Green/Blue guy (biggest elevator company in the world). If that is an MRVF which from the motor it would appear to be. There aren't many of them left and are excessively difficult to trouble shoot and fix. When a a lot of these companies say "its obsolete we have to mod it" its usually false. But with this unit, the sooner you could get all of the change the better. That machine is an older system Otis used, the drop for the CW is a little further away from the drive sheave I have seen but the closet thing I can recall is what's called a 270 wrap (270 degrees of traction) not a bad machine if it is that. The groves can have Kevlar inserts made which I would recommend to do during the mod.

If you were going to MOD it I would try and mount up a new AC motor with a flex coupler. Have a motor shop come in and look at the mounting capabilities. They can get you the write AC motor which will work with most new controllers and drives. Smartrise controllers are my favorite non proprietary product right now. They also come with a 5 year warranty. Good luck.

#32585 - 02/20/22 10:25 PM Re: Otis Machine Type [Re: dandaman]  
Joined: Jan 2012
Posts: 885
jkh Offline
4 Ever Learning.
jkh  Offline
4 Ever Learning.

Joined: Jan 2012
Posts: 885
It’s a DT series! Looks like a 315…


Make good choices,

JKH
#33879 - 09/17/22 08:33 AM Re: Otis Machine Type [Re: dandaman]  
Joined: Sep 2022
Posts: 2
ElsomJonah Offline
stranger
ElsomJonah  Offline
stranger

Joined: Sep 2022
Posts: 2
I’m currently modding two MRVF’s.
We had to have 480 brought up to the MR. It was 208 with the MRVF

Last edited by ElsomJonah; 09/17/22 08:37 AM. Reason: I was wrong
#33880 - 09/17/22 08:41 AM Re: Otis Machine Type [Re: dandaman]  
Joined: Sep 2022
Posts: 2
ElsomJonah Offline
stranger
ElsomJonah  Offline
stranger

Joined: Sep 2022
Posts: 2
If you have batteries it’s MRVF. I ripped out a 270 wrapped Otis machine several months ago. It was a 17 stop relay nightmare before the mod!

#33882 - 09/17/22 02:03 PM Re: Otis Machine Type [Re: dandaman]  
Joined: Aug 2017
Posts: 436
EElevator Online content
addict
EElevator  Online Content
addict

Joined: Aug 2017
Posts: 436
I would rip the whole thing out and replace with a gearless torin/SES machine and an ibox controller.

Elsom, how come yall didn't just use a step up iso transformer for the voltage?


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