Welbilt Frymaster FilterQuick FQG30U-easyTouch Installation, Operation And Maintenance Manual page 47

A.1.2 Bulk Oil Wiring
WARNING
The FQ30-T™ fryer will ONLY operate with bulk oil systems that have a three-pole float
switch. If the float switch is the older two-pole switch, call the bulk oil provider. These
float switches are polarity specific which may short to ground and damage an FIB
board.
A-3