Mitsubishi ductless system question

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For many years, Mitsubishi units required a separate 120 volt circuit to supply the fan coil units and the control was by two wire low voltage between the fan coil and the outdoor unit. Recently in the last two years the entire line of split systems has changed to using a three wire high voltage control from the outdoor unit to the inside fan coil, which is the scheme employed with most other popular Japanese manufacturers such as Fujitsu, and Sanyo. Our local inspectors always required a local disco for the fan coil units when the Mitsubishi models were installed, but not for the three wire controled units since they are fed off the outdoor units, which are usually wired with a lockable disco switch. The indoor fan coil units draw generally less than two amps current.
 
I called the tech support and got the same guy I talked to as a sales person. Same information for HiSEER, YMGI products. Anyway I just ordered three 30 amp fused disconnects and 3 non- fused manual motor switches and will let the mechanic (who I know and trust) to figure it out when they get here. These tri zone heat pumps have backup heaters in them. The extra material will be used on another job down ther road hopefully. I work for the Federal Gov. and it takes 30 days to get any material ordered here so I would much rather have ordered it than not.
 
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