Jayco Alante 2023 High altitude deration User Manual High altitude deration Operation of the water heater at high altitudes may require derating. If the water heater is not properly dated, lack of sufficient oxygen for combustion may produce improper burner operation. Pilot outage caused by burner lift-off or scooting from a yellow burner may occur, … Continue reading Jayco Alante 2023 High altitude deration User Manual