IBC SL 26-260 G3 Quick Start Manual page 4

If the burner does not light, the process is repeated until the burner lights and flame is detected. After 3 trials for
ignition, the boiler locks out and will need to be manually reset by clearing the error on the touchscreen controller
(Diagnostics > Advanced Diagnostics > Clear Errors). The boiler a utomatically resets after 60 minutes, if no action
is taken.
To perform a combustion test and adjustment:
1. Turn off the boiler's gas shut-off valve.
2. With a small (1/8" or 3 mm) flat screwdriver, open the inlet gas supply pressure test port by turning its center-
screw 1 full turn counterclockwise.
3. Attach a manometer to the inlet pressure test port and turn on gas to appliance.
Static manometer reading should be ideally 7" w.c. for Natural Gas and 11" w.c. for Propane.
Minimum and maximum static pressure should be between 5" and 14" w.c. Monitor pressure
throughout the commissioning (start-up) procedure. Pressure may drop up to 1" to 2" w.c. at high fire.
4. Before you change the load to manual control, note the load setting.
5. Set the load to manual control, and set the heat-out value to the maximum MBH for the boiler. This load
should be large enough to allow the boiler to operate at high fire for over 10 minutes.
6. With a combustion analyzer probe in the flue gas test port, check the flue gas reading and adjust the gas:air
ratio screw to bring the flue gas to within the parameters indicated in Table 1
7. Adjust slowly (clockwise) the High Fire (Gas : Air Ratio Adjustment) screw to obtain the correct CO
(see Table 1 ). M ake tiny adjustments (may require several turns). Turning the High Fire (Gas: Air Ratio
Adjustment) screw clockwise will lean out the flame.
Note
Clock the gas meter (see instructions on Page 6) to confirm full maximum rating plate input.
Check the measured results with Table 2.
8. Set the heat-out value in manual mode to the minimum MBH for the boiler (see Table 1
9. While the boiler is at Low Fire, compare the combustion reading against the reading in Table 2. The reading
should be within the range listed.
10. Restore the load to the previous load type. All the programmed settings will be restored and the load will
operate as before. Confirm a smooth ignition sequence.
11. Turn off the gas supply at the gas shut-off valve.
12. Disconnect the power to the boiler.
13. Disconnect the manometer.
14. Close the gas supply test port screw by turning clockwise.
15. Turn on the gas supply shut off valve and test for gas leaks.
16. Restore power to the boiler.
Next you must fill in the information and affix the included fuel conversion labels to the boiler as indicated after the
conversion is completed.
4 |
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value
2
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