Ask Experts Questions for FREE Help !
Ask
    smith410947's Avatar
    smith410947 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    May 10, 2008, 09:14 AM
    Central air unit
    I need help wiring the transformer
    I have two black wires coming from unit and only one black from transformer
    I don't know which one goes where
    Cornfuzed's Avatar
    Cornfuzed Posts: 5, Reputation: 2
    New Member
    		  
    #2

    May 10, 2008, 09:40 AM
    Check the transformer output , it should be 24v ac voltage. If it is the 2 wires from your condenser got to the contactor for the compressor in which case as long as one side of the wire don't go to ground it doesn't matter. If it does the one that's not grounded is the hot and should go to the black on the trans former and you need to pick up a common for the other leg .

    (guess I should have asked what it was attached to... lol)
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #3

    May 10, 2008, 09:41 AM
    Sounds like an autotransformer. These have a common for primary and secondary windings. Sounds odd as most use low voltage control, if switched by high voltage, it would make sense?
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #4

    May 10, 2008, 07:16 PM
    You need at least four wires for the transformer to work. Two primary and two secondary. And you have how many??
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #5

    May 10, 2008, 08:34 PM
    You need at least 3 wires to work, I think T-Top is thinking isolated coils transformer.
    Need Coil Voltage?
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #6

    May 11, 2008, 01:53 PM
    My bad I assumed we are working on a normal 115v or 230v system with 24vac out put.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member
    		  
    #7

    May 11, 2008, 02:57 PM
    I would think that also, Maybe a wire broke off from transformer?
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Central a/c unit [ 3 Answers ]

My a/c unit when I woke up this morning wasn't working it was 80 in my house. The fan on the unit outside isn't turning. The inside is working.

Central air unit [ 2 Answers ]

My thermostat is set on 65. Unit is blowing cold air

Central air unit [ 2 Answers ]

:mad: Hello, I surely hope that someone can help me my central air unit stops working... It blows nothing but hot air... And I notice that the fan outside on the unit doesn't work. Could it be the capacitor going bad? Or is it something else? Please help Thanksss :(

Central air unit fan not turning when unit on [ 3 Answers ]

Recently our central air unit stop producing cool air and noticed our fan was not turning outside, and was making a loud humming noise, can this fan be replaced without replacing the entire unit :confused:

Central air unit [ 3 Answers ]

I have a central air and heating unit that's about 5 yrs. Old. It will blow air out but not at the temperature that we want. What would be the problem of this unit? Also, my wife had a window open for the last three days would this affect the unit? Thanks myron

View more questions Search