Patent ID: 7806133

Claim:
A method of operating a liquid level controller by steps comprising: determining an operating mode of an invertible pilot cartridge based on an orientation of said cartridge relative to a cartridge housing, in which said cartridge is separate and distinct from and secured within said housing, and wherein said operating mode is selected from a group consisting of a direct operating mode and an indirect operating mode; setting a span control mechanism to a neutral position relative to said cartridge housing, said span control mechanism secured to a proximal end of said cartridge and extending beyond the confines of said housing; adjusting a float communicating with said cartridge to a neutral position relative to said cartridge housing; and adjusting said span control mechanism to determine an amount of movement needed by said float to supply a control signal, wherein said control signal is a direct control signal when said cartridge is secured for operation within said housing and said span control mechanism secured to said cartridge extends beyond the confines of said housing in a first direction, and further wherein said control signal is an indirect control signal when said cartridge is inverted and secured for operation within said housing such that said span control mechanism extends beyond the confines of said housing in a second and opposite direction from said first direction.