Just bought a used Lex, took it out last weekend. Found out quickly the manuals are trash. Got the water htr working on gas but can't seem to figure out how to get the wtr htr working on elect. Planning to take it back out next weekend. I have an ON/OFF switch outside behind a panel for the water htr. Inside I have a DSI switch and have no clue what it does. Any help would be appreciated in how to operate the water heater.