AUTOFLAME Mk8 MM - Control Process

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17 Fully Metered Combustion Control

Mk8 MM Manual Page | 301

17.3.3 Control Process

The air servomotor will trim to maintain the commissioned fuel-air ratio. The fuel servomotor will trim to

maintain the commissioned firing rate. Both of these control function operate independently if fully metered

combustion control is enabled.

Main Page

Default Chapter4
- Table of Contents4
1 Mk8 MM Overview, Specifications and Wiring13
- Mk8 MM Overview13
- Wiring Schematic17
- Electrical Specifications20
- Connection between Mk8 MM and Mk8 EGA EVO29
- Connection between Mk8 MM and Mk8 DTI30
- Sequencing Connection Diagram31
- Standards32
2 Options and Parameters33
- Options33
- Parameters57
3 Commissioning Procedure67
- Overview67
- Installation Checks68
- Servomotors69
- Commissioning Fuel and Air Positions72
- Fuel Flow Metering89
- Gas/ Air Pressure Commission96
- Single Point Change97
- Online Changes102
- Setpoint Schedule103
  - Setpoint Schedule Overview103
  - Configuring Setpoint Schedule103
4 Fuel Output Modes & Changeover Options106
- Overview106
- Fuel Output Modes on the Mk8 MM107
- Single Fuel Output Mode (SFOM)108
- Dual Fuel Output Mode (DFOM)109
- Fuel Change on the Fly (COF)112
- Gas Pressure Sensors and Valve Proving in DFOM with COF118
- Limitations of DFOM and COF119
5 Pid Control120
- Proportional Band120
- Integral Control121
- Derivative Control122
2000 MM Features123
- Firing Rate Control123
- Using 4-20Ma Servomotors125
- Flame Detection Using Flame Switch128
- Continuous Pilot129
  - Continuous Pilot with Interrupted Pilot Sequence130
  - Continuous Pilot with Intermittent Pilot Sequence131
- Load Sensor Value Calibration132
- External Modulation133
- External Setpoint133
- Second Setpoint Select133
- Start Position Interlock and Purge Position Interlock134
- Purge Pressure Proving/ Purge Hold135
- No Pre-Purge136
7 Intelligent Boiler Sequencing137
- Sequencing Schematics137
- Sequencing Options and Parameters141
- Hot Water Sequencing142
  - Implementing Hot Water Sequencing142
  - Two Port Valve Operation143
- Steam Sequencing144
- Troubleshooting - Sequencing146
8 Multi-Burner Operation147
- Multi-Burner Overview147
- Configuring Multi-Burner Operation148
- Multi-Burner Operation Options150
  - Fully Linked Operation150
  - Independent on Fault151
- Multi-Burner with Water Level Control152
- Multi-Burner with EGA153
  - Multi-Burner with Single EGA153
  - Multi-Burner with Individual Egas154
- Multi-Burner External Modulation155
  - Permanent External Modulation155
  - Switched External Modulation155
9 Expansion Features156
10 Water Level Control157
- Overview157
- Water Level Control Expansion Options159
- Water Valves165
- Ways of Level Sensing168
  - Overview168
  - Configuration169
- Capacitance Probes172
- Nd Low Probe181
- Analogue Water Level185
- Auxiliary Alarm Inputs186
- Commissioning Procedure187
- Water Level Control Functions198
- Faults201
11 Top Blowdown204
- Overview204
  - Importance of Maintaining TDS204
  - TDS, Conductivity and Temperature205
- Top Blowdown Expansion Options206
- TDS Valves209
- TDS Probe210
- Configuration213
  - Wiring213
  - Top Blowdown PID Controller213
- Ways of Controlling TDS Level214
- Water Hardness Monitoring217
- Calibrating the TDS Probe218
- Faults220
12 Bottom Blowdown221
- Overview221
- Bottom Blowdown Expansion Options222
- Bottom Blowdown Reduction223
  - Blowdown Energy Savings223
  - Calculation for Bottom Blowdown Reduction224
- Installation Guidance226
- Set-Up230
  - Bottom Blowdown Settings230
  - Setting Servomotor231
- Bottom Blowdown Configuration235
  - Bottom Blowdown Schedule235
  - Bottom Blowdown Log237
- Faults238
13 Draught Control239
- Overview of Draught Control239
  - Parts Required for Draught Control241
- Draught Control Expansion Options242
- Draught Control Operation244
- Draught Control Set-Up248
  - Configuration248
  - Ways of Using Draught Servomotor249
- Commissioning Draught Control250
  - Commissioning Checks250
  - Commissioning Screen251
- Faults252
14 Direct Modbus253
- Overview253
- Direct Modbus Expansion Options254
- Setup and Configuration255
- Modbus Addresses256
15 First Outs264
- Overview of Firs Outs264
- First Outs Expansion Options264
- First Outs Configuration265
16 Heat Flow270
- Overview270
- Expansion Options271
- Wiring273
- Heat Flow Function274
- Steam Flow Metering279
- Hot Water Flow Metering287
- Spare Temperature Sensor291
- Faults294
17 Fully Metered Combustion Control295
- Overview295
  - Introduction295
  - Importance of Excess Air295
- Fully Metered Control Expansion Options296
- Fully Metered Combustion Control Operation300
- Set-Up303
- Faults308
18 Operation309
- Home Screen309
  - Home Screen Components310
  - Faults312
- Status Screen313
- Fuel-Air Screen318
- Flame Safeguard Screen321
  - Flame Safeguard321
  - Flame Safeguard - History322
- Channels Screen323
  - Servomotor323
  - VSD Channel324
- Gas Pressure Sensor Screen325
  - Gas Pressure325
  - Gas Sensor - History326
- Air Pressure Sensor Screen327
  - Air Pressure327
  - Air Sensor - History328
- Fuel Flow Screen329
  - Fuel Flow329
  - Fuel Flow - History330
- Sequencing Screen331
- EGA Screen334
- Outside Temperature Compensation Screen337
- Water Level Screen338
  - 18.12.1 Water Level - Status338
  - 18.12.2 Water Level - History339
- Top Blowdown Screen340
- Bottom Blowdown Screen342
- Steam Flow Screen343
  - 18.15.1 Steam Flow - Status343
  - 18.15.2 Steam Flow - History344
- Draught Screen345
  - 18.16.1 Draught Control - Status345
  - 18.16.2 Draught Control - History346
- First Outs347
- Fully Metered Combustion Control348
- System Configuration Screen349
19 Errors and Lockouts371
- Errors371
- Lockouts375
- Alarms and Warnings380
- Settings Conflicts388
- Forced Commission Reasons393

AUTOFLAME Mk8 MM - Control Process

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