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VII Gas Piping
Gas piping to the boiler must be sized to deliver adequate gas for the boiler to fi re at the nameplate input at a line pressure
between the minimum and maximum values shown on the rating plate. For more information on gas line sizing, consult the
utility or the National Fuel Gas Code.
Figure 25 shows typical gas piping connections to the CWD boiler. A sediment trap must be installed upstream of all gas
controls. Install a manual shutoff valve outside the jacket and ground joint union as shown.
The boiler and its gas connection must be leak tested before placing the boiler in operation. When doing this, the boiler and
its individual shut-off must be disconnected from the rest of the system during any pressure testing of that system at pressures in
excess of ½ psi. When pressure testing the gas system at pressures of ½ psi or less, isolate the boiler from the gas supply system
by closing its individual manual shut-off valve.
FIGURE 25: GAS CONNECTION TO BOILER