SFC 15-99 / SFB 15-99 - Fuel Conversion to Natural Gas - Kit P-805
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5
Note
: Allow the unit to operate at High Fire for 3 minutes to stabilize. (The unit operates in manual mode for 10
minutes then switch back to the normal operating mode. To extend manual mode operation, press the
Service
and
Plus
buttons together twice while the unit is operating in manual mode to reset the timer for 10 more
minutes.) Do not make adjustments if the service display shows an “h”.
5. Clock the gas meter (see instructions
Clocking the Meter (for Natural Gas only) on page 6
) to confirm full
maximum rating plate input.
a. With a combustion analyzer probe in the flue gas test port, check the measured results against
-
High Fire.
b. If the results are outside the permitted range, check the inlet pressure, and confirm that the correct orifice is
installed.
6. Switch the unit to low fire by pressing the Service button and Minus button at the same time. The unit will drop to
low fire. “L” will show in the service display.
a. Compare the readings with
- Low Fire. If adjustment is necessary, remove the Low Fire
Adjustment cap to reveal a Torx head screw.
b. Make tiny adjustments, typically less than 1/8th of a turn at a time. Turn the screw clockwise to increase
CO
2
and counter-clockwise to reduce CO
2
. If the target cannot be met, even after a half turn, contact the
factory.
c. When finished, replace the Low Fire cap, and leave the manual mode by pr AND -
simultaneously.
7. Switch off the unit by pressing the space above the dot.
8. Turn off the gas at the unit's manual gas valve.
9. Remove the flue gas analyzer from the test port, and reinstall the test port cap.
10. Remove the gas pressure manometer from the gas valve, and fully close the test port.
11. Turn on the gas at the unit’s manual gas valve.
12. Ensure there are no gas leaks before reinstalling the front cover.
13. Turn on the unit by pressing the space above the dot.
Next you must fill in the information and affix the included fuel conversion labels to the unit as indicated after the
conversion is completed.
Completing and Affixing the Conversion Labels
1. Fill in the conversion labels (included in the kit) associated with the new fuel type.
2. Place the conversion labels onto the boiler as indicated on the last page.
