A/C Split Unit - Disconnecting Means

Status
Not open for further replies.
M. D. said:
Marc ,about a year ago you said ;
....
You went on to say that if the interconnection was field installed it would require a disconnect.
Click to expand...
Yeah, what I said then and now both stand. No contradiction.
 
M. D. said:
Right, ..the question I have is where do I find the back up for this premise
Click to expand...
The one's with a factory interconnect bear one UL file number, and the one's with seperate supply to the indoor unit have two UL file numbers. One for the indoor piece, and one for the outdoor piece.
 
So,.. If the instructions for the single UL file number unit do not call for a disconnect and I cut one in , I may have an unsanctioned field modification issue ...

Thanks for responding
 
M. D. said:
So,.. If the instructions for the single UL file number unit do not call for a disconnect and I cut one in , I may have an unsanctioned field modification issue ...
Click to expand...
Yeah, I think that's right, but don't take that to the bank. That's just my opinion at this point, which I belive to be sound, but I'm wrong about stuff every day. I'm just a regular electrician like you. I think everyone can (or should) agree that if the indoor portion gets a seperate source of supply (not supplied via the indoor-outdoor interconnect cable) it needs a disconnect. The one's where the outdoor unit is the only portion that is actually supplied with power, and a factory multiconductor tray cable connects to the indoor unit, and powers that indoor unit, is where the confusion is for most people.
 
Here is a macfreebie. Most times the ac guys try to figure a way to put the indoor fan units back to back more or less with the outdoor compressor. Since they often do that, it is not too far of a run, to put a double pole (or single pole if a small enough 120 volt compressor) switch in the unit feeder, but mount it right near the interior fan coil facing the interior side. Then take the run on out to an outdoor disco for the compressor side. If you de-energize the interior switch, there will be no power delivered to the outdoor compressor, and hence no power delivered to the fan coil unit either, whether that be low volt or line voltage. Code requirements met. Most units sold now have a three wire fan coil control, and those three pole switches are around 40 bucks, vs, a double pole switch for about 8-12 bucks depending on where you buy.
 
Status
Not open for further replies.
Top