DSI stands for direct spark ignition. DSI means that the water heater can be automatically lighted by a switch inside the RV.
History
Direct spark ignition was invented by the Fenwal Company. Before DSI, water heaters were turned on by lighting the pilot flame outside the RV.
Function
The light switch activates the burner, which heats the water until it reaches the set temperature. Once this temperature is reached, the burner goes out, restarting only when the heated water is used.
Benefits
Direct spark ignition is easier and safer than using a pilot flame; the DSI circuit board closes the gas valve automatically as soon as the set temperature is reached.
Warning
Make sure there is water in the heating tank before using the water heater for the first time by connecting the RV to a water source, checking to see if the bypass valve is open and turning on the on-board water pump.
Types
Suburban and Atwood are the two largest producers of RV DSI water heaters, most in the six- to 10-gallon range.
Writer Bio
Shane Thornton has published business-related on eHow.com. In addition to business, his other areas of interest include sports, traveling and entertainment. He earned a Bachelor of Science in Business management from Arizona State University’s W.P. Carey School of Business.
