We are arranging with an HVAC pro to replace our central AC compressor and add a separate mini-split system. We will have two compressors in close proximity on the side of the house where we presently have one. I'm trying to sort out what the outdoor electrical supply should look like.
The new units list the following requirements:
- Central Air: Rheem RA1642AJ1NB calls for 208-1-60 supply, 25.0A min amperage, 40A max protection (HACR breaker or fuse)
- Mini-split: Fujitsu AOU12RLFW1. The docs online are a bit fuzzy. An installation manual for (almost) the same PN calls for 208-1-60 supply, 13.4A min amperage, 15A max protection (HACR breaker or fuse). However, my HVAC pro said to provide 20A fused disconnect)
Presently I have a 30A 240VAC fuseable pullout switch (Eaton DPF221R) fed by a 30A breaker in my service panel. My contractor quoted $250 to replace the outside disconnect. Separately, he requested a 240V 20A supply for the mini-split.
Based on answers so far I’m leaning towards a #6 home run on a 2-pole 50A breaker to the existing interior junction box. From there I would run in conduit to two outdoor disconnects: the existing 30A fused disconnect (with 20A fuses) for the mini split and a new 60A fused disconnect with gfci outlet (and 40A fuses) for the central air.