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CBhvac
 
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Default wires to capacitor on YORK AC unit are burned and melted


"Stormin Mormon" wrote in message
...
In order to assist Tony (whose messages no longer appear on my screen) I

am
providing the answers to the test. Enjoy!


and as normal, you only have part of the answer..

What if you are dealing with a 3 phase unit???

Try again.


--

1) You say that each of the three compressor terminals represents its own
winding. I know of two windings, but you say there are three. What are the
names of the three windings, and what do they each do?
SM: There are two windings. They are the start winding, and the run

winding.
I didn't think Tony could answer this one.

2) What are the names of the electrical terminals on a typical compressor?
What does each terminal do?
SM: Common, start, and run. Common acts as a neutral, though on 220 volt
comps, the common terminal is "hot". Start provides for extra torque for
starting. On refrigeration compressors, the start terminal is usually only
powered for a second or two, via a start relay. On AC units, it is often
hooked to a motor run capacitor. Run terminal provides the power to run

the
compressor.


3) In terms of temperature, what happens when a terminal is corroded, and
trying to carry current? And in terms of the electrical flow, what happens
when a terminal is corroded?
SM: When a terminal is corroded, it provides a resistance. Also can be
called a "load". This blocks or reduces the flow of electricity, and turns
the electricity to heat energy.

4) What is the electrical current path through a compressor? For example,
which terminal is hot, and which is neutral?
SM: During startup (of start relay units) power is supplied to the S
terminal, and exits through the C terminal. After the compressor motor
starts, power is then supplied to R terminal,a nd exits through the C
terminal. In some AC compressors, the power is applied to R terminal,

using
C for neutral. S and R terminals goes to a motor run capacitor.