Re: OT: Calling all HVAC GUYS!!!! A Little Help Here, Please??

I agree, Eric.

Its time for this guy to call someone who knows what they are doing TO COME
ACTUALLY DO THE WORK.

It's one thing to get zapped by 60 v on a pin playfield in you living or
game room, its quite another to get it from 120/240v when you are standing
on grass where the AC unit is. If you have to ask how to do something like
this in RGP, you are likely nowhere near qualified to do this kind of work.

Chris.


"Eric A." <eavedesian@xxxxxxxxxxx> wrote in message
news:i2e8531unnjeehnndbqd7mm40slf35n7tu@xxxxxxxxxx
On Tue, 22 May 2007 22:08:02 -0500, "Moparmaniac"
<moparmaniac@xxxxxxxxxxx> wrote:

"> The contactor that is pulling in when you turn on the t-stat is
controlled by, and gets it's power from the indoor unit.

I came to that conclusion tonight after seeing that the contactor was
still
humming even after turning off the external circuit to the a/c unit.



So even if > it pulls in you still may not have power to the outdoor unit
or
you
may have power but it's not getting through the contactor for some
reason. Make sure the contacts are not burnt or that an ant or some
other critter hasn't gotten between the contacts so they can't close
properly.

On the outgoing (for lack of the proper word) side of the switch, the
contacts did look pretty dark. I did attempt to press down on it when it
was on (humming) but didn't do anything...Perhaps I should cut the juice
to
it and file the contacts??

STOP RIGHT NOW BEFORE YOU KILL YOURSELF!!!

With that said you sound like someone that shouldn't be messing with
this. The reason I say this is because you should have checked for
voltage before pushing on the contactor. Also, if the contacts are
indeed arching and black the could be carbon tracking and buildup
which could cause an explosion if one of the arch shields are missing
or broken. If you've never seen one of these explosion videos or
witnessed one in person you really need to watch this:

http://www.youtube.com/watch?v=-iClXrd50Z8

Granted this is a controlled test and this is 480 3 phase but you get
the picture, right? The point I'm trying to make is this. When the
thing blows you naturally have an instinct to take a deep breath. That
deep breath causes you to suck in the sparks, flash, and smoke thus
scoring your lungs.

The contactor is almost ALWAYS going to hum when older. Also, if at
this point you have not checked for 240 at the legs of the contactor
like Lloyd suggested you really need to start there.

Call me if you want some help over the phone.


Eric A.
313-268-0541


.

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