IBC SL Series, Installation & Operating Manual

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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 High fire Low fire
CO max
PPM
Range % Target % Range % Target %
Natural Gas
9.0 - 10.0 9.5 8.2 - 9.2 8.7
<150
Propane
10.3 - 11.3 10.8 9.3 -10.3 9.8
< 250
Table 12 Combustion test target ranges - CO
2
/ Maximum CO
Note : Low Fire CO
2
should be at least 0.5% lower than High Fire CO
2
71
6.3.3 Adjusting the gas valve