10 Fully Metered Combustion Control
04.09.2016 Mk8 MM Expansion Features Installation and Set-Up Guide Page 147
10.3 Set-Up
10.3.1 Configuration
To activate fully metered combustion control on the Mk8 MM, the Fully Metered Combustion System
expansion software feature must be unlocked. The activation code for the serial number of the MM will
need to be purchased using part number MK8008, and uploaded to the MM via Download Manager
software.
Please see Autoflame PC Software Guide for more information on unlocking expansion features on the
Mk8 MM using Download Manager software.
At minimum the MM will require 4-20mA signals from the air and gas flow meters. If using mass flow
meters, then temperature and pressure sensors for the fuel and air must be disabled for fully metered
(they can still be used for flame safeguard). Volume flow metering requires the fuel air and
temperature and pressure values to derive the mass flow rates. When using volume flow metering,
enabling temperature and pressure sensors will make the displayed mass flow calculation more
accurate. Temperature and pressure sensors should be installed near the volume flow meters.
The table below shows the MM terminals used for fully metered combustion control.
Terminal Description Function
T2 T2 temperature sensor Fuel temperature
- Common Common for T2
T3 T3 temperature sensor Air temperature
- Common Common for T3
F- Common Common for MF
MF Make-up flow meter 4-20mA Air flow rate
EX- Common Common for EX+
EX+ 4-20mA Gas flow rate
31 Digital input signal (brown)
Gas/ air pressure sensors
32 Digital input reference (purple)
33 DC neutral (blue)
34 DC power (red)
When wiring the gas and air pressure sensors, the screen is connected through the casing of the lead
and through the sensor; therefore the flying lead should be connected to the MM without a screen. The
screen should be carried through until the connection to the MM; the screen should not be connected
to the S terminal.
The table below shows the options/expansions options to be set for fully metered combustion control.
Option Description Setting
57 Fuel flow metering 1
61 Fuel 1 calorific value Must be set accurately
62 Fuel 2 calorific value Must be set accurately
63 Fuel 3 calorific value Must be set accurately
64 Fuel 4 calorific value Must be set accurately
Expansion Option Description Setting
140 Fully metered function 1
141 Fuel flow meter type As required
142 Fuel flow meter scaling As required
143 Air flow meter type As required
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