3 Commissioning Procedure
Mk8 MM Manual Page | 91
Figure 3.5.iii Fuel Flow Commissioning
Press to access the fuel flow commissioning screen. There are 10 points which need to be
entered across the commission curve from low to fire high fire, with low fire being point 1, and high fire point
10. Type in the heat value or ‘dummy value’ using the keypad and press the return key to save that point.
Note: The servomotors will drive to the low fire position, and then drive up as the fuel flow commissioning
points are entered. Precautions must be taken to ensure that the boiler is warm enough for all 10 points to be
entered.
As you enter the heat values for the 10 points, these will become marked on the graph to the right of the
screen. Once the fuel flow commissioning is complete, press to return to modulation in normal
firing mode.
If you press at any time during fuel flow commission, this will not store the points.
3.5.2 Commissioning Fuel Flow Through 4-20mA Feedback
If fuel flow metering is enabled through using 4-20mA feedback on terminals EX- and EX+, the heat value
will automatically get populated according to the analogue signal at that fuel valve position. After each heat
value is displayed, press enter to go to the next fuel flow point.
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