firelaw, not really sure if anyone has that exact model here, but basically all models work the same.
Find the back side of your water heater, and open the valves going into and out of the water heater. Close the valve that connects the 2 lines. Make sure the bottom plug is in the water heater, as well as caps on all of your low point drains. Slowly introduce water into the city water connection, checking everywhere for leaks or open lines. Open each faucet individually, and let a lot of water run through the lines to flush out your RV antifreeze. It will take a little while to get water through your 1st hot water line, as the water heater needs to fill.
I also sanitize my water system, including my fresh water tank every spring, but that is a whole nudder topic.
Chap , DW Joy, and Fur Baby Sango
2006 Ford F150 Super Cab 4x4
2008 Surveyor 263