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GAS PRESSURE REGULATOR
The gas pressure regulator is nominally preset to the outlet values shown in table O-2 and O-3, within +. 1" W.C. If an
adjustment is needed, turn the adjustment screw clockwise to increase pressure or counterclockwise to lower pressure.
VENTING OF DIAPHRAGM GAS COMPONENTS
Boilers have gas train components that have diaphragms in their construction that are supplied with a bleed line connec-
tion that must be connected to the outside atmosphere as required by NFGC or (for Canada) the B149 Installation Codes
and applicable provisions of local codes. Under NO circumstances shall bleed lines terminate in the gas utilization equip-
ment flue or exhaust system.