IBC SL Series Installation & Operating Manual page 75

9. Check the results and confirm the correct settings when you return the boiler to high fire,
and then to low fire.
Note
For natural gas, clock the gas meter to confirm full maximum rating plate input.
10. To exit the Test Operation screen, select Back.
11. Remove the call for heat.
12. If a manometer is connected to the gas valve inlet gas pressure port:
a. Turn off the gas supply at the external gas shut-off valve.
b. Disconnect the manometer.
c. Tighten the inlet pressure port screw with a Torx 15 screwdriver.
13. Remove the analyzer probe, and install the test port plug.
14. Turn on the gas supply shut off valve, and soap test for leaks.
Fuel
Range %
Natural Gas
9.0 - 10.0
Propane
10.3 - 11.3
Table 12 Combustion test target ranges - CO
Note: Low Fire CO should be at least 0.5% lower than High Fire CO
2
High fire
Target %
9.5
10.8
/ Maximum CO
2
71
6.3.3 Adjusting the gas valve
Low fire
Range % Target %
8.2 - 9.2 8.7
9.3 -10.3 9.8
2
CO max
PPM
<150
< 250