I have two old package heatpumps supplied by what looks like 4/3 lines each on its own breaker. 60 amp fuses. I am installing two split units the condenser requires 220 and 20 or 35 amp depending on if I run it in 2 ton or 3 ton mode. Plan is to start wit 2 ton mode. The air handler takes a 220v 15 amp fuse. So worst case I have 50 amps more likely 35 amps. I do not want to run to more lines to get 4 circuits at that location, likely $400 just for the wire. So I want to take each 60 amp 220v circuit run it to its own sub panel with two 220v circuits summing 50 amps or less. To stick with code I then need to have a disconnect on each circuit at the unit a few feet away. Any issues with this, I want to stay 100% safe. The old units are or WERE beasts, the new ones high efficient inverter technology with variable speeds with no hard starts so a lot easier on the entire circuits.
Looking for confirmation on my plan as safe and PROPER. Will verify the wires are 4/3, would it still work of they are 6/3. Plan to start tearing down and seeing what the wires actually are tomorrow. Thanks