I just had a 2-ton Rheem heat pump and air handler installed, to replace a Carrier 2-ton that was not working. The installer, a Rheem authorized installation company, moved the location of the hp and the disconnect box. A retired electrician friend of mine was looking at it all after installation and said that the info. printed on the hp called for 25 amp minimum, but that my heat pump was connected to a 20 amp breaker (using the existing 12-gauge wire). He thinks this is wrong, but when I asked the installer about it, he said he had connected "many" of these heat pumps to 20-amp breakers and that "they do just fine."
My electrician friend thinks the hp should have a 10-gauge wire/30-amp breaker. My lights are dimming momentarily when the heat pump comes on. I would appreciate any advice on this. (I'd like to talk to Rheem directly, but apparently you can only talk to the people in your area who install their equipment...). Thanks for any advice you can give me.