Question about Omega Trane Furnace Draft Inducer Blower 115 Volt Variable Speed Fasco # A190

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Electrical diagram for contactor (240 v/1 phase/24 v coil)

GemericHVACR/ contactor electrical diagram schematic for (240 v / 1 phase/ 24 v coil)

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How to connect motor 1 phase with mcb , contactor , timer ,switch selector on off on , and lamp indicator

Posted on Nov 23, 2012

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Wiring diagram RUUD UAPA-036JAZ


the condensor gets 240 volts a-c and 24 volts a-c to control contactor. pretty straight forward on this 3 ton unit. the 240 volts comes off breaker box and the 24 volts comes off thermostat and common of transformer.

Jun 10, 2014 | Ruud Heating & Cooling

1 Answer

I need to run a contactor ( 40 amps 3 phase ) with the help of thermostat..i have connected L1,L2 n L3 and output coneccted in T 1 T2 T3 . now how to connect A1 and A2 .... i want that contactor should...


1) Copy following links for illustrations showing timer controlling contactor in 3-phase environment:
http://waterheatertimer.org/How-to-install-3-phase-timer.html
http://waterheatertimer.org/images/3-phase-timer-diagram-24Vac-865.jpg

2) Substitute thermostat instead of timer for switching control.

3) I don't know what thermostat you have, or if it's functioning or the rating.

4) Which contactor do you have?
Do you have a 3-phase contactor??
Or two-pole single phase contactor?

5) Match thermostat output voltage with contactor voltage:
Thermostat output is 24 volt? Then use 24Volt coil on contactor.
Thermostat output 120 or 277 > then use contactor with same coil rating.

6) More information is needed.
I don't understand description of your wiring.
Add a comment and compare with illustrations sent, so I can visualize ... or attach photo and/or give product numbers so maybe I can locate wiring diagrams.

Jan 31, 2013 | Connecticut Electric Electrical Supplies

1 Answer

Wiring of an electrical contactor


Hi,

I'm an electrician and would like to help you out.

Unfortunately, you're real short on details for this question. There are many types of contactors that work to operate all kinds of loads. Basically, a contactor allows a switch of one voltage to operate a light on another voltage or system - or allows a relatively low current switching device or momentary contact push button to operate a much larger current device.

What are you trying to do (provide as much detail as possible)?

What is the control type (push button, switch, sensor, etc.) and voltage (24V, less than 120V more than 120V)? What is the load device (light, motor, heater), voltage (120, 240 single phase 3 phase) and current (in amps)?

Is this a contactor or a starter (starters have overload relay blocks under the contactor)? What size is the contactor? Is there a listing for amps? Does it have a NEMA number - like "NEMA SIze 00"? Or a horsepower rating? What is the voltage rating of the coil?

Jan 29, 2013 | Gb Electrical Electrical Supplies

1 Answer

My air conditioner will not run, the fan will not run in auto or in run mode, the compressor will not start. The thermostat clicks on but the air unit does not. this is a Goodman cplj18-1b unit.


Hello, if the outside unit is not running check tje power supply to make sure you are getting 240 volts, also make sure the contactor coil is receiving 24 volts, if you are not getting 24 volts at the contactor then it may be a bad thermostat, control board or the thermostat wiring is loose or perhaps cut somwhere. If you have 24 volts at the contactor and does not energize than replace the contactor coil.

May 12, 2011 | Goodman Heating & Cooling

1 Answer

My ac is blowing out air but it is not cold and the fan outside is not running


Hello, first thing to check is if you are getting voltage at your outside disconnect, you should get 240 volts, if not check for a tripped breaker or a blown fuse. next check power at the contactor coil you should have 240 on the line side of the contactor. If that checks out good check for 24 volts at the side terminals of the contator coil, if you have 24 volts at the coil does not energize than you have a bad contactor coil. If there is no 24 volts at the contactor coil side terminals than either there is a problem with the thermostat or low voltage wiring. and finally if that all checks out good than your capacitor must be replaced.

Apr 25, 2011 | Heating & Cooling

2 Answers

My outside unit want come on


Hi,

Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...

AirConditioner Trouble - Review the Possibilities

heatman101

Apr 23, 2011 | Goodman CKL24AR24 Air Conditioner

1 Answer

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

Dec 21, 2010 | Paragon 8145-20 Defrost Timer

1 Answer

How do you tell with a voltmeter if the contactor coil is bad?


Check for 24 volts AC at the coil. If you do not have 24 volts at the coil (with AC turned on at your thermostat), then your problem is not with your contactor, but rather a control problem. If you have 24 volts at the coil, check for 240 volts on the LINE side (commonly marked L1 & L2) of your contactor. If you do not have 240 volts, check for open fuse or tripped or bad circuit breaker. If you have 240 volts, check for 240 volts at the LOAD side of your contactor (Commonly marked T1 & T2). With 24 volts on your coil and 240 volts on the LINE side, you should have 240 volts on the LOAD side. If not, the contactor is not making contact.

You can also perform a continuity test as shown in this video:

May 23, 2010 | Ruud UAKA030 Air Conditioner

1 Answer

Short power outage yesterday- System is running, but is not cooling.


check for 240 volts at the contactor and 24 volts at the contactor coil from the indoor thermostat,if you have them then you have a bad compressor contactor that supplies 240 volts to the compressor

Apr 04, 2010 | Ruud Handle Air Conditioner

1 Answer

Contactor will not engage i have 240 at contactor and 19v at thermostat


Have you checked the contactor coil voltage? It should be 24V. It will be the smaller wires either on the top/bottom of the contactor or on the sides of it. Turn the 240 V off prior to checking the low voltage to ensure you do not get electrocuted. If you have voltage at this point, then the contactor coil is defective and you will have to replace the contactor. About 25$ US at most electrical supply houses.

Sep 12, 2009 | Amana Heating & Cooling

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