Hi Dober2004,
Congratulations on your new Cyclone.
The 4-way water valve: Normal is the valve setting that allows the pump to pull water out of the fresh tank when the pump is turned on. For more info about the valve and other parts of your water system, you may want to take a look at our owner-written
Water Systems Guide.
Propane tanks: The dual regulator has an auto-changeover. It also has a control knob/dial with an arrow indicating which hose/tank it's getting propane from (assuming that tank is open and has propane). If both tanks are open, when the tank pointed to runs out, it should continue running with propane from the remaining tank.
Some people leave both tanks open. Others keep one tank closed. It's inconvenient to run out of propane in the middle of a cold night and have to go outside to open the 2nd tank. But it's really inconvenient to run out on a cold night and discover that both tanks are empty. In the winter, I run with one tank open and periodically move the tank to get a feel for its weight. If it feels low, I'll open the other tank, switch the regulator over, and get the first tank refilled.
By the way, when it's time to disconnect a tank to refill it, you point the regulator dial so it's drawing propane from the other tank. Then disconnect.