[Shop-talk] Fwd: mini-split or window unit ?

[Arvid]

As others will also mention ...

At least for mine it was 220v with ground no neutral to disconnect for the outdoor unit. The outdoor unit has a transformer in it that will provide the 110v back to the indoor unit via the wiring that goes thru the same hole as the refrigerant tubing.

Be sure to include all of the tubing, tubing covering, wire between the indoor and outdoor unit, the need to evacuate the lines, etc. At least on the Mitsubishi the outdoor unit came precharged with refrigerant but you still need to evacuate the lines between the indoor and outdoor unit before you turn the valve on the outdoor unit to release the refrigerant into the lines.

I don't think anyone ships pre-sealed lines like Sears provided with their DIY Whole Home AC units that I installed in the house 35 years ago. Dean (THE HVAC GUY) replaced that unit about 25 years ago when the condenser stated leaking.

Another reason to let a pro do it was the length of the lines themselves. I was concerned about my ability to cut the lines and properly flare the ends for a lifetime good seal. Dean had the correct tools to do it properly and he guaranteed his work. Of course you may be able to not cut the lines and just roll up any excess near the outdoor unit but ...

I did begin to wonder though. We were talking while he was flaring the tubing and forgot to put the nut on before doing the flair. Obviously caught the error shortly thereafter. Note to self ... do not disturb the highly trained technician when he is working!!

On 4/22/21 2:20 PM, Mike Rambour wrote:
> Well, ok, you guys talked me into it...Mini-Split it is.
>
>   I looked into the wiring and it won't be as hard as I thought, I had completely forgotten that I left a pull string in the attic (scissor joists, so not enough room to crawl up there).  I must have been smarter in my old days to leave that pull string there, it will make pulling 12/3 pretty easy to the far corner of the garage and get a disconnect box there.
>
>   Now the debate is self-install something like Mr. Cool DIY or have someone do it, but that is more a money debate than a shop-talk list debate :)
>
>      mike
>
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