A: Hello! This would take a 20A double-pole breaker. The corresponding wire would be 12 AWG, with 2 hots and a ground, no neutral.
A: Hello! This item is replaced by Home Depot item number 325844602.
A: Hello! The warranty is 5 years on parts and the compressor, upon registration of the product.
A: Hello! That is correct. The way it works is that the outdoor condensing unit is pre-charged with R410a to support line lengths up to 25 ft long. You will need to remove the air from the lines before releasing the refrigerant from the outdoor unit, using a vacuum pump or the Kwik-e-Vac flushing kit that we sell.