17 Fully Metered Combustion Control
Mk8 MM Manual Page | 305
17.4.3 Commissioning
Important Note:
Prior to commissioning, the fuel and air servomotors must be calibrated to ensure that the position of the
valves and damper correspond to the potentiometer feedback signal as displayed on the MM. When the
valve is fully closed, the MM should display zero degrees. If it does not, please adjust the servomotor
potentiometer.
The commissioning procedure as described must be strictly adhered to. Anybody commissioning an MM
must be trained in operating combustion equipment safely. The Autoflame products must only be installed,
set up, commissioned and adjusted by an Autoflame certified technical engineer.
The fundamental idea of the system is to set a fuel valve position and then set a corresponding air damper
position. Care must be taken when adjusting the fuel and air positions so as not to create any unstable or
hazardous combustion conditions, e.g. moving the fuel valve to the open position without increasing the air
damper position. Improper use may result in property damage, serious physical injury or death.
The equivalence ratio and excess air provided on the MM are calculated displays based on setup and inputs
from external sources. The exhaust gases should be monitored using a combustion analyser at all times
during commissioning and for any changes to the combustion curve.
Figure 17.4.3.i Set HIGH Position
For the installation and pre-commissioning checks, please refer to sections 3.2 and 3.3.
The same commissioning procedure for the fully metered combustion control system as the standard
system’s servomotors and VSDs. The difference is that the commissioning engineer can see on the screen
the excess air going into the combustion process and can set the servomotors and VSDs accordingly.
The screen above shows the HIGH position for the servomotors and VSDs being set.
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