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Posted by Murdentech on August 27, 2006, 8:32 am
> Hello,
>
> I built an addition and installed a Mitisbishi Mini split system, 9,000
> BTU, 3/4 Ton.
>
> I'm familar with wiring concepts, but I have to admit I'm a bit
> perplexed at the wiring instructions included with the unit.
>
> I have a 14/2 wire connecting to the Outdoor compresser and connecting
> the outdoor to the indoor is something I'm confused about.
>
> The instructions show basically four lines, S1, S2, S3 and a ground
> wire going between the two units. I'm not clear if I should be using 2
> separate wires here and I can't understand how a 14/2 wire can hook up
> to 4 different connectors.
>
> The instructions go on to say that I need to use AWG22 wire for teh
> 12-24V DC. What's even more confusing is that it's saying S1 and S2
> should be 208/230V AC 1 phase, 60V, but then it goes on to say that S2
> (again) and S3 should be DC12-24V....
>
> How can S2 be both? What exact sort of wire(s) should I be using
> between the two units? Any help would be huge! Thanks
>
Aside from all the replies in here, the correct wire to use between the
outdoor and indoor unit is 14/5 and is available from the supply house where
you bought the unit. If not, Johnstone carries it. Yes, 14 guage, 5
conductor wire. It is made for this application and meets code as well as
manufacturer's specification (which sometimes is the code).
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