Chapter 4 — CFC Commissioning
Part No. 750-263 4-17
NOTE:When adjusting low fire offset, clockwise adjustments
increase gas flow, and counterclockwise adjustments
decrease gas flow.
When adjusting the main gas choke, clockwise adjustments
decrease gas flow, and counterclockwise adjustments
increase gas flow.
Refer to Appendix A for further information on gas valve setup,
operation, and testing.
6. Modulation OFF point
Prior to setting combustion, the Modulation OFF point should be
adjusted upward to avoid nuisance shutdowns while the burner is
under manual control.
7. Setting Combustion
Note: A Combustion Analyzer is required to properly set-up the
Model CFC burner. Do not attempt to fire and adjust the
burner without this equipment.
Note: Ensure boiler is filled with water prior to burner startup.
The burner does not have need of linkages for fuel/air adjustment,
nor is a separate manual-auto switch provided for burner
positioning. All firing rate adjustments are accomplished via the CB
Falcon Control. Setting combustion will require manually
modulating the burner via the CB Falcon from low fire to high fire
two or more times to ensure a consistent air/fuel ratio.
Figure 4-12 Main Gas Choke -
High Fire Adjustment
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