AUTOFLAME Mk8 MM - Page 5

3.4.12 Set INTER or START Position ................................................................................................. 87
3.4.13 Save Commission .................................................................................................................... 88
3.5 Fuel Flow Metering .......................................................................................................................... 89
3.5.1 Commissioning Fuel Flow Through MM .................................................................................. 89
3.5.2 Commissioning Fuel Flow Through 4-20mA Feedback .......................................................... 91
3.5.3 Calorific Fuel Data ................................................................................................................... 92
3.5.4 Conversion Factor for Imperial Gas Flow Meters .................................................................... 93
3.5.5 Correction Factor for Burners Significantly Above Sea Level ................................................. 93
3.5.6 Gas Volume Conversion Factors ............................................................................................. 94
3.6 Gas/ Air Pressure Commission........................................................................................................ 96
3.7 Single Point Change ........................................................................................................................ 97
3.8 Online Changes ............................................................................................................................. 102
3.9 Setpoint Schedule .......................................................................................................................... 103
3.9.1 Setpoint Schedule Overview .................................................................................................. 103
3.9.2 Configuring Setpoint Schedule .............................................................................................. 103
4 FUEL OUTPUT MODES & CHANGEOVER OPTIONS ............................................................ 106
4.1 Overview ........................................................................................................................................ 106
4.2 Fuel Output Modes on the Mk8 MM .............................................................................................. 107
4.3 Single Fuel Output Mode (SFOM) ................................................................................................. 108
4.3.1 Fuel Configuration and Wiring in SFOM ................................................................................ 108
4.3.2 Pressure Sensors in SFOM ................................................................................................... 108
4.3.3 Commissioning in SFOM ....................................................................................................... 108
4.3.4 Fuel Changeover Process in SFOM ...................................................................................... 108
4.4 Dual Fuel Output Mode (DFOM) ................................................................................................... 109
4.4.1 Fuel Configuration and Wiring in DFOM ................................................................................ 109
4.4.2 Pressure Sensors in DFOM ................................................................................................... 109
4.4.3 Commissioning in DFOM ....................................................................................................... 110
4.4.4 Fuel Changeover Process in Dual Fuel Output Mode ........................................................... 110
4.5 Fuel Change on the Fly (COF) ...................................................................................................... 112
4.5.1 Overview ................................................................................................................................ 112
4.5.2 Checks before COF can take place ....................................................................................... 113
4.5.3 COF Changeover Position ..................................................................................................... 113
4.5.4 COF Fuel Changeover ........................................................................................................... 114
4.5.5 Checks after COF Fuel Changeover ..................................................................................... 115
4.5.6 Continuous Pilot with COF ..................................................................................................... 116
4.6 Gas Pressure Sensors and Valve Proving in DFOM with COF ..................................................... 118
4.7 Limitations of DFOM and COF ...................................................................................................... 119
5 PID CONTROL ........................................................................................................................... 120
5.1 Proportional Band .......................................................................................................................... 120
5.2 Integral Control .............................................................................................................................. 121
5.3 Derivative Control .......................................................................................................................... 122
6 MM FEATURES ......................................................................................................................... 123
6.1 Firing Rate Control ......................................................................................................................... 123
6.1.1 Hand Operation...................................................................................................................... 123
6.1.2 Low Flame Hold ..................................................................................................................... 123
6.1.3 Auto Operation ....................................................................................................................... 123
6.2 Using 4-20mA Servomotors........................................................................................................... 125
6.2.1 Overview ................................................................................................................................ 125
6.2.2 External 4-20mA Servomotor Requirements ......................................................................... 125