I am looking to install a: MrCool E Star DIY 4th Gen 24k BTU Ductless Mini-Split Heat Pump Complete System 208-230V/60Hz
I reached out to MRCool support and they confirmed what I found through google and forums: that it requires a 30amp breaker with 10-2 wire.
I’m trying to understand their manual. Under a table titled: Minimum wire gauge for power cables, It has listed for the 24k unit: MCA 22 amps, MOP 35 amps. AWG: 8 min 6 Pref.
When I asked the customer service person they said: the metric system that the manual was pulled from makes it a 8 or 6 gauge wire, which you can run from the breaker to the disconnect. However, from the disconnect to the condenser 10-2 will be needed because the screw will not hold the 6 or 8 gauge on those units.
I already have a 240, 30amp breaker and 10-2 wire run in my garage, My understanding is I can put a sub panel to power my air compressor and then run outside to a disconnect for the mini split.
So my question is will a 30amp disconnect outside work for the mini split or do I put a 35amp fuse somehow in the disconnect? The product brochure says: maximum fuse (outside) 35 amps and again lists the 22 MCA. If I put a 35 amp fuse outside do I then need to have 8 gauge wire and a 40 amp breaker?