Gas Piping - Crown Boiler AWR070 Installation Instructions Manual

f) After it has been determined that each appliance remaining connected to the common venting system properly vents
when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning
appliances to their previous condition of use.
g) Any improper operation of the common venting system should be corrected so the installation conforms with the
National Fuel Gas Code, ANSI Z223.1. When resizing any portion of the common venting system, the common
venting system should be resized to approach the minimum size as determined using the appropriate tables in Part 10
of the National Fuel Gas Code, ANSI Z223.1.
• SHUT OFF GAS SUPPLY BEFORE SERVICING THE BOILER.
• ALL GAS PIPING MUST BE GAS TIGHT. USE GAS RATED THREAD COMPOUND
ON ALL THREADED JOINTS TO AVOID LEAKS, WHICH MAY RESULT IN FIRE OR
EXPLOSION.
• SIZE GAS PIPING, REGULATORS, VALVES AND METERS SO AS TO PROVIDE AN
ADEQUATE GAS FLOW AND PRESSURE TO THE BOILER DURING OPERATION.
FAILURE TO DO SO MAY CAUSE POOR COMBUSTION, NOISE, INJURY OR
DEATH.
Gas piping to the boiler must be sized to deliver adequate gas for the boiler to fire 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 7.1 shows typical gas piping connection to the AWR boiler. A sediment trap must be installed upstream of all gas
controls. Install a manual shut-off 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 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 7.1: GAS CONNECTION TO BOILER
VII Gas Piping
WARNING
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