To adjust the oil pressure, remove cover screw and insert 1/8 Allen Wrench. Turn
counterclockwise to below pressure desired. Turn clockwise to set to desired pressure. Keep
cover screw tight except when adjusting pressure.
The bypass pressure on Hi-Low fire burners is adjusted at the bypass regulating valve by
loosening the motor driven linkage and turning the stem on the valve to the desired pressure.
Refer to Section 5.8: Fuel Oil Flow Schematic.
Disconnect pump coupling when operating on Gas Fuel.
For two-pipe installation (supply and return) to fuel oil storage tank, the ByPass
Plug must be in position as shown in cut-away. Remove Cover and insert Allen
Wrench to be sure ByPass Plug is screwed in tight.
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