Similar to recent threads but different enough I think to ask. Sorry for the long intro. Skip down to REAL QUESTION HERE if you get bored, but it is kind of a funny story.
I have an old residential elevator installed in the 80's by previous, previous owner. Elevator died last summer. Called around to about a dozen elevator companies and only one would even come out and look at it (others only did commercial, only worked on units they installed, would not work on something this old). Tech comes out and decides motor is bad but wants to talk to boss about what to do. No word for ages, I phone, they delay, I phone they delay etc. Finally call around again, still no other takers willing to look at it. So call the one company again and pretend to be a new call. Same tech comes out, surprised that elevator is broken again already (he remembered the house), very surprised when I tell them they never came back to fix it.
So now he starts again. Decides brake is not releasing and caused motor to burn out. Removes motor (240V reversible 1.5 HP Baldor--don't know if it was dual voltage) and says they will have it repaired. Last I ever see of Baldor. When, after numerous more phone calls, they finally come out again, they bring a new Dayton dual voltage, reversible 1.5 HP motor with same mount as Baldor had. (They dumped the Baldor despite my request to have it back if not fixable.)
Tech wires in new motor, it just buzzes. We argue over how it should be wired as same controller relays release brake with 120V coil. He is afraid of frying the coil with 240V and wants to leave some of the motor wires unconnected to anything, not even each other. Eventually we compromise a bit and he continues. Bottom line is he can wire it to run up (regardless of which call button is pushed) or he can wire it to run down (regardless of which call button is pushed) but he cannot wire it to reverse. Calls the boss and they decide they need a different new motor. Comes back a week later with a nearly identical Dayton dual voltage, reversible 1.5 HP motor, but with different color wires sticking out of it (same total number of wires though). Does same thing as the first motor. Call boss again and they talk.
Conclusion is that the original Baldor was a totally custom designed motor just for my model elevator. No other 240V motor in the world will ever work. However, if they just wire the Dayton to run at 120V everything will be fine. All he needs to do it go up in the attic to the controller, ground one of the two hots to create a neutral, and wire this Dayton motor up as 120V reversible and I will be in business with a working elevator.
I veto this plan as the controller itself runs on 24V from a stepdown transformer off of the 240V supply. I fear the tech messing things up so badly nobody will ever be able to straighten it out. Plus I have totally lost confidence in his (and his boss') knowledge of electricity. Yes he knows tons more about elevators than I do, but I am not confident in his motor knowledge. I do not know what is wrong, but I strongly suspect there is another problem the tech is missing and its not the supply voltage to the motor.
REAL QUESTION IS HERE
So, I cannot believe that the Dayton motor which will not reverse when energized with 240V will suddenly be willing to reverse when energizes at 120V. Comments? Please do not tell me to get another elevator company, I have already tried that. Guess it is time to learn elevator repair :mad:
Thanks.
I have an old residential elevator installed in the 80's by previous, previous owner. Elevator died last summer. Called around to about a dozen elevator companies and only one would even come out and look at it (others only did commercial, only worked on units they installed, would not work on something this old). Tech comes out and decides motor is bad but wants to talk to boss about what to do. No word for ages, I phone, they delay, I phone they delay etc. Finally call around again, still no other takers willing to look at it. So call the one company again and pretend to be a new call. Same tech comes out, surprised that elevator is broken again already (he remembered the house), very surprised when I tell them they never came back to fix it.
So now he starts again. Decides brake is not releasing and caused motor to burn out. Removes motor (240V reversible 1.5 HP Baldor--don't know if it was dual voltage) and says they will have it repaired. Last I ever see of Baldor. When, after numerous more phone calls, they finally come out again, they bring a new Dayton dual voltage, reversible 1.5 HP motor with same mount as Baldor had. (They dumped the Baldor despite my request to have it back if not fixable.)
Tech wires in new motor, it just buzzes. We argue over how it should be wired as same controller relays release brake with 120V coil. He is afraid of frying the coil with 240V and wants to leave some of the motor wires unconnected to anything, not even each other. Eventually we compromise a bit and he continues. Bottom line is he can wire it to run up (regardless of which call button is pushed) or he can wire it to run down (regardless of which call button is pushed) but he cannot wire it to reverse. Calls the boss and they decide they need a different new motor. Comes back a week later with a nearly identical Dayton dual voltage, reversible 1.5 HP motor, but with different color wires sticking out of it (same total number of wires though). Does same thing as the first motor. Call boss again and they talk.
Conclusion is that the original Baldor was a totally custom designed motor just for my model elevator. No other 240V motor in the world will ever work. However, if they just wire the Dayton to run at 120V everything will be fine. All he needs to do it go up in the attic to the controller, ground one of the two hots to create a neutral, and wire this Dayton motor up as 120V reversible and I will be in business with a working elevator.
I veto this plan as the controller itself runs on 24V from a stepdown transformer off of the 240V supply. I fear the tech messing things up so badly nobody will ever be able to straighten it out. Plus I have totally lost confidence in his (and his boss') knowledge of electricity. Yes he knows tons more about elevators than I do, but I am not confident in his motor knowledge. I do not know what is wrong, but I strongly suspect there is another problem the tech is missing and its not the supply voltage to the motor.
REAL QUESTION IS HERE
So, I cannot believe that the Dayton motor which will not reverse when energized with 240V will suddenly be willing to reverse when energizes at 120V. Comments? Please do not tell me to get another elevator company, I have already tried that. Guess it is time to learn elevator repair :mad:
Thanks.
Another dual voltage motor question
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