4 Fuel Output Modes and Changeover Options
Mk8 MM Manual Page | 106
4 FUEL OUTPUT MODES & CHANGEOVER OPTIONS
4.1 Overview
The Mk8 MM has the capability of controlling multi-fuel applications in various ways; it offers the possibility of
commissioning up to 4 different fuels as well as offering 3 different ways of switching between fuels.
The MM’s default Single Fuel Output Mode allows the commissioning of up to 4 different fuel curves using
the same set of fuel outputs and changing between fuels is possible using changeover relays. The Dual Fuel
Output Mode allows the configuration and commissioning of 2 different fuels using individual set of outputs
for each fuel on the MM and therefore no changeover relays are required when switching between fuels.
The fuel Change on the Fly feature (COF) offers the possibility of switching between fuels configured in Dual
Fuel Output Mode without the need to turn off the burner, thus eliminating downtimes when switching
between fuels, reducing heat loss from the pre and post-purge processes as well as reducing thermal stress
on the boiler. COF also opens the possibility of setting up automatic fuel switchover (for example when the
main fuel is running low).
The system and burner suitability must be considered before setting up the fuel output mode or configuring a
system for COF.
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