Fuel Pressure Relief Valve - Controls the pressure of the fuel being pumped to the burners
Preparing for Operation.
Remove thermometer (1, fig. 2-6) from tool box and install in the thermometer well (2).
Raise spray bar (22, fig. 1-1) by pulling back bar turn-up lever (7) and locking.
Figure 2-6. Thermometer and Thermometer Well.