Changed a heat pack for a customer from a 4.8kw to a 9.6kw unit. Part of the job was to load shed or more correctly drop this load. They have a 20kw Generac (18kw on NG). The idea was to add the micro switch to the side of the transfer mechanism and break the 'Red' and drop the whole unit ac or heat. So, I wired the whole thing up and if you break the B going to the thermostat, it continues to run including the heat. I could see the fan running on for a while, but the heat continues for a while too. Turn of the power with the Red open and turn it back on and it still runs heat and all. Don't understand if the power to the W is removed why does the heat coil still stay on?
They change to the higher KW heat pack went well and runs as intended.