Burnham CHG225 - Manual (Page 22)

22
VIII Gas Piping
Gas piping to the boiler must be sized to deliver adequate gas for the boiler to fire at the nameplate input at an
inlet 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 7.1 shows typical gas piping connection to the CHG boiler. A sediment trap must be installed upstream
of all gas controls. Install the factory provided manual shut-off valve outside the jacket with a 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 1/2 psi. When pressure testing the gas system at pressures of
1/2 psi or less, isolate the boiler from the gas supply system by closing its individual manual shut-off valve.
Figure .1: Gas Connection To Boiler