Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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I need a wiring diagram for a up down and stop control for a three phase garage door motor

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  • ACDOOR
    ACDOOR May 11, 2010

    Need Manufaturer and Model # to Wire properly. Phase does not matter as control wiring is all low voltage.

  • Anonymous Mar 16, 2014

    i need a wiring diagram of a coromaster 2000 garage door motor

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Well, without the make and model of your electric operator system that is impossible to answer. If you do have the make and model try this web site. http://www.dominoengineering.com/pdfs/SRC/SRCWiringDiagrams/CommercialOperatorDiagrams.pdf

Posted on Oct 21, 2009

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How do I reverse a three phase electric motor?


Reversing rotation of 3 phase motors:
CAUTION: Before attempting any repair of electrical equipment verify the power is disconnected to the device.
CAUTION: Three phase motors could potentially be controlled by frequency control systems. It is recommended a trained electrician perform repairs to any electrical system. In particular, consult a trained electrician if the system includes a frequency control system.

Most 3 phase motors can reverse rotation simply by swapping any 2 of the 3 phase wires. A typical 3 phase wiring circuit will include a safety ground wire (usually green) and 3 phase wires, often designated A/B/C, or 1/2/3, or color coded to distinguish each. By swapping the terminal connection of any 2 of the three phase wires, for example, 1 & 2 or 2 & 3 or 1 & 3, but leaving the third phase wire unchanged will reverse the rotation of most motors.

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telepathy do not work that hot as in hollywood movies...

you need to provide a model or at least if this is three phase or single phase...

single phase is easy, you have cord with three wires, earth, active and neutral.

you need to open connection box on your compressor and you will find three wires there terminating in junction box, earth connect to earth (usually green or green with yellow stripes), then you have your neutral (usually brown or black) and active (usually blue or red), connect them, do not put cover on yet, plug cable into the power point and switch on/off power. check if motor is rotating in correct direction, if fuses are not blown... if motor is rotating in wrong direction - switch power wire with neutral wire, it just meant that you wired it in reverse...

do not need diagram for that...

do not forget to give some points...

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I have craftsman 1/2 hp door opener and when the door has been down for three to five hours it will just open up by it self


Disconnect the wire from terminal #1 on the rear of the motor unit. This will disable both the wall control and the wiring to it. If this stops this problem then you can by a process of elimination determine if it is the wall control or the wiring. Replace the wire at terminal #1 and remove the wires from the back of the wall control. Remember which wire goes where. If your problem still doesn't happen then the wall control is bad.

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I need a three phase wiring diagram for 8145-20 model timer.


8145-20 240Volt Paragon timer is not 3-phase.
Clock motor is 240V.
You need a transformer to convert 3-phase to single phase 240V to operate timer.
Then timer outputs can control 3-phase power using 3-phase contactors
Contactor below is 3 phase with 240V coil
http://www.grainger.com/Grainger/DAYTON-Contactor-2UTP7?Pid=search

Defrost timer wiring diagrams show below:
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

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I need a wiring diagram for the Hobart H600 which has a multi tap motor on and i would like to change the voltage on the motor to 200volt single phase 120/208 or even 120208 3phase. The wiring diagram is...


You cannot wire a three phase motor for single phase and you cannot wire a single phase motor for three phase. If you have a three phase dual voltage motor your options are 220 or 440 volts. If you have a single phase dual voltage motor your options are 120 or 240 volts. A 208 volt Hobart motor will only function correctly on 208 volts and is not dual voltage.

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You can't run a 3-phase motor on 110V unless you use a 3-phase inverter. Depending on the size of your motor, these will probably run you around $150 for the least expensive type. Take a look at--- http://americanrotary.com/static-phase-converters.html

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The wiring for the limit switch assembly is:

Yellow wire to the up limit contact

Gray wire to the center contact

Brown wire to the down limit contact

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1 Answer

Ineed a wiring diagram for a three phase garage door


you have a 3 phase garage door?? 480 volts? I think your not looking at it right. Please go and give us the manufactor, modle , voltage. Is this in your home or an industrial site?

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1 Answer

Garage Door Openenr Motor Buzz


Look at your manuel find the page that shows the limit access switch. (Unplug your opener.) It isn't really a switch, but the three white plastic screw like parts. The center has a brown wire connected to it, which has a metal piece that is as wide as all three white screws. The outside screws are your limit access stop guides, one for the up control stop guide and the other for the down control stop guide. If the center screw with the metal part gets caught behind on of the stop guides the motor will not engage. Gently move metal piece from behind the stop guide.

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