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AUTOFLAME Mk8 MM Installation And Commissioning Guide
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10 Fully Metered Combustion Control
04.09.2016
Mk8 MM Expansion Features Installation and Set-Up Guide
Page 145
10.2.3 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 thes
e control function operate independently if fully
metered combustion control is enabled.
154
156
Table of Contents
Default Chapter
6
Table of Contents
6
1 Technical Specifications
11
Mk8 Expansion Board
11
Expansion Board Inputs and Outputs
12
Fuse Ratings
12
Cable Specifications
13
Expansion Board Terminals Description
14
2 Expansion Options
17
3 Water Level Control
35
Overview
35
Safety
35
Autoflame Water Level Control
35
Water Treatment
36
Water Valve
37
Specifications
37
Feed Water Valve Sizing
38
Feed Water Control
39
Ways of Level Sensing
40
Overview
40
Configuration
41
Capacitance Probes
45
Overview
45
Operation
46
Specification
46
Installation Safety Guidelines
49
Capacitance Probe - Externally Mounted Pots
50
Capacitance Probe - Internally Mounted Pots
52
Capacitance Probe - Installation for a Water Tube Boiler
54
External Probe Chamber Dimensions
55
Configuration
56
Low Probe
57
Overview
57
Operation
58
Specifications
58
Installation and Safety Guidelines
60
Configuration
61
External Level Sensor
62
Auxiliary Alarm Inputs
63
Commissioning Procedure
64
Commissioning Checks
64
Levels
64
Setting End of Probe Level
65
Low Level
67
Setting
67
Low Level
68
Setting
68
Setting Control Point Level
69
Setting HIGH Level
70
Save Commissioning
71
Operational Checks
73
Adjust Control Point
74
Water Level Control Functions
75
Pre-Alarms
75
Pump Bypass
75
Test Outputs and Shunt Switch
76
Sudden Pressure Drop
77
Faults
78
4 Top Blowdown
81
Overview
81
Importance of Maintaining TDS
81
TDS, Conductivity and Temperature
82
TDS Valve
83
TDS Probe
84
Specification
84
Dimensions
85
Installation
86
Configuration
87
Ways of Controlling TDS Level
88
Continuous TDS Control
88
Solenoid and Servomotor 2-State TDS Control
88
TDS Timing Diagram
89
Sample Routine
90
Calibrating TDS Probe
91
Faults
93
5 Bottom Blowdown
94
Overview
94
Bottom Blowdown Reduction
95
Blowdown Savings
95
Calculation for Bottom Blowdown Reduction
96
Installation Guidance
98
Bottom Blowdown Valve
98
Bottom Blowdown Module
99
Set-Up
102
Bottom Blowdown Settings
102
Setting Servomotor
103
Bottom Blowdown Configuration
107
Bottom Blowdown Log
109
Faults
110
6 Draught Control
111
Overview
111
Benefits of Draught Control
111
Fully Integrated Draught Control
111
Draught Control Operation
113
Overview
113
Deactivation Window
113
Draught Control Trim
115
Set-Up
117
Configuration
117
Ways of Using Draught Servomotor
118
Commissioning Draught Control
119
Commissioning Checks
119
Commissioning Screen
120
Faults
121
7 Remote Control
122
Overview
122
Configuration
123
Modbus Addresses
124
8 First Outs
133
Overview
133
Configuration
134
Running Interlock Circuit
134
Interlock Option
138
9 Heat Flow
139
Overview
139
Benefits of Steam/Hot Water Flow Metering
139
Configuration
139
Steam Flow Metering
140
Steam Flow Calculation
140
Steam Flow
144
Steam Flow with Economiser
145
Steam Flow with Deaerator
146
Steam Flow with Deaerator and Feed Sensor
147
Hot Water Flow Metering
148
Hot Water Flow Calculation
148
Hot Water Flow
150
Hot Water Flow with Economiser
151
Faults
152
10 Fully Metered Combustion Control
153
Overview
153
Introduction
153
Importance of Excess Air
153
Fully Metered Combustion Control Operation
154
Philosophy
154
Firing Rate
154
Control Process
155
Mass Flow Meters
156
Volume Flow Meters
156
Set-Up
157
Configuration
157
Limitations
158
Commissioning
159
Faults
163
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AUTOFLAME Mk8 MM Specifications
General
Brand
AUTOFLAME
Model
Mk8 MM
Category
Controller
Language
English
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