AUTOFLAME Mk8 MM - COF Fuel Changeover

4 Fuel Output Modes and Changeover Options
Mk8 MM Manual Page | 114
Figure 4.5.3 COF Changeover Position
4.5.4 COF Fuel Changeover
Once the COF Changeover Position has been reached, the fuel changeover process takes place, the
process takes the following steps:
• MM Phase: Fuel Changeover – COF Pre-Ignition
A pre-ignition phase turns on the ignition and pilot outputs (if interrupted pilot is selected in option
111); these outputs remain on during the changeover process while both fuels are firing
simultaneously.
• MM Phase: Fuel Changeover – COF 1
st
Safety
The new fuel main valves are opened starting its main flame. The two fuels fire together for the main
flame proving time (Option 117).