AUTOFLAME Mk8 MM User Manual

4 Fuel Output Modes and Changeover Options
Mk8 MM Manual Page | 115
Figure 4.5.4: COF 1
st
safety phase where both fuels fire simultaneously
• MM Phase: Fuel Changeover - COF 2
nd
safety
The original fuel main valves are turned off and the new fuel servo/VSD channels move onto the
commissioned curve of the new fuel while maintaining the same fuel channel angle. The main flame
on the new fuel is monitored for five seconds in the COF 2
nd
safety phase.
• MM Phase: Moving to Curve – COF Main Proving
The pilot (if interrupted pilot is selected in option 111) and ignition outputs are turned off.
• MM Phase: Moving to curve – firing
The new fuel starts to modulate up its commissioned curve.
4.5.5 Checks after COF Fuel Changeover
After a fuel changeover, if valve proving is optioned on the previous fuel which is now no longer firing, valve
proving takes place for that fuel while the current fuel continues to fire. This verifies that no leaks are present
on the non-running fuel valves. Failure of valve proving will cause a lockout that stops the burner.

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English