3
4. Pilot. The pilot provides an ignition source for the main burners. Your boiler has either a standing
(continuous) pilot or an intermittent (spark ignited) pilot. The standing pilot should always be lit
while the intermittent pilot ignites only when there is a call for heat and extinguishes when the call
for heat ends. See Figure 8.
5. Gas Valve. The gas valve monitors pilot flame and regulates gas flow to the burners and pilot.
6. Safety Relief Valve. A mechanical device that protects the boiler against excessive pressure. The
safety relief valve can discharge a large amount of steam or hot water – the installer should
provide piping to discharge water near the floor close to a floor drain. If the safety relief valve
discharges water, follow the instructions TO TURN OFF GAS TO APPLIANCE on the Lighting
Instructions affixed to the inside of the removable front jacket panel (see Figures 3 through 5 for
typical lighting instructions), and contact a qualified service agency.
C. Lighting Instructions. Instructions to place the boiler in operation and to turn off the boiler are shown
on the Lighting Instructions Label posted on the inside of the front jacket panel of the boiler. Typical
lighting instructions are shown in Figures 3 through 5.
Figure 1: Control Location
