The heat pump falls under 440. The panel is not within sight so a separate disconnect will be required. Heat pump has MCA 17.7A and Max Fuse Size 25A. Does the disconnect have to be fused? Also since the nameplate says "Max Fuse Size" will a breaker in the panel be ok? Heat pumps have the overload protection built in usually, correct?
I guess what im trying to get at is that usually when you have a heat pump being fed from a panel that is not within sight, you have the disconnect at the heat pump as well as a breaker in the panel for the circuit. When this is the case I'm wondering if the disconnect has to be fused or not. If it doesn't, is it common practice to have double protection by the circuit breaker and a fuse in the disconnect? How do you size the breaker? Do you use max fuse size?