The Suburban water heater operation is one of the more frequently asked questions in the forums, which is why we have placed a tutorial on it in the FAQ section. A lot of dealers fail to explain it's operation in the initial PDI.
The biggest learning curve is how to use the Suburban's electric heating element (if equipped).....and where the switch to turn it on/off is usually located.
Here is a link to the tutorial in the FAQ section. Hope it helps in the understanding of the Suburban water heater and how to use it on propane, or electricity (if equipped), or both at the same time.