12
12
VII Gas Piping
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 Chapter 2 of the
National Fuel Gas Code
.
Figure 10 shows typical gas piping connection to the CWI 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 10: GAS CONNECTION TO BOILER
* State of Massachusetts Requires Manual
Shut-off Valve to be “T” Handle Type
*
Summary of Contents for CWI103
Page 2: ......
Page 17: ...15 15 FIGURE 12 INDIRECT WATER HEATER BOILER SIDE PIPING FIGURE 11 STANDARD BOILER PIPING ...
Page 34: ...32 32 Notes ...
Page 41: ...39 39 Notes ...
Page 43: ...41 41 ...
Page 45: ...43 43 ...
Page 47: ...45 45 ...
Page 49: ...47 47 FIGURE A1 BASE HEAT EXCHANGER FLUE COLLECTOR ASSEMBLY ...
Page 51: ...49 49 FIGURE A2 JACKET INSTALLATION ...
Page 53: ...51 51 FIGURE A3 TAPPING LOCATIONS SEE TEXT FOR TAPPING USES ...
Page 54: ...52 52 Notes ...
Page 55: ...53 53 Notes ...