Edu ha escrito:

Well, actually the overload has 3 real pins, none of them is a screw,
but it is true that the one numbered "3" is a half-width faston, while
1 & 2 are normal fastons.

The relay has 2 real faston plugs at one side (both to the same side of
the PTC), and at the other side I think there are 4 small holes which
might plug directly to 2 pins from the compressor (start/run). Maybe
the spare wire which comes from the overlad to an empty hole in the
relay is intended to make it match the position of the "common pin" in
the compressor

This sounds right. That way the overload will get connected to the
common pin of the compressor, thus protecting both the start and run
windings.



This weekend I will to to make the last compressor I have alive run...
I hope everything works! Your should have seen the wiring I made at my
first attempt ! It has changed a lot since your help ..!! :-)

Thanks a lot for your time!

Good luck then!

Best regards!
Eduardo


lsmartino ha escrito:

Edu ha escrito:

Ok, thanks for your time. Now I think I understand everything!
So, I have to wire the white box (relay) between run and start, and
apply 220v to common and run, placing in series the overload protection
(black box).

As the overload protection has 3 pins, I assume pins 1 & 2 are the
"in/out" pins, and the 3rd pin, which is a thinner faston, is for some
add-on line start or run capacitor. The original relay didn't have any
capacitor, so maybe I can left pin 3 unconnected.

Am I right??? I can see the light at the end...:-)

Thanks a lot!

Regards.
Eduardo.



The overload protection has only TWO contacts. The center screw is for
adjusting the overload protector at factory, its NOT a connection pin
to anything.

Remember that the PTC relay should be plugged directly to the
compressor. In one of the sides of the relay, there should be three
holes. Align these holes with the three compressor pins, and plug the
PTC relay there.

This is a schematic from a refrigeration compressor. In the page two
you will find a wiring diagram:

http://de.refrignet.danfoss.com/Tech...1_Cd42s402.pdf