AUTOFLAME Mk8 MM - 10.2 Water Level Control Expansion Options

10 Water Level Control
Mk8 MM Manual Page | 159
10.2 Water Level Control Expansion Options
The table below shows the Expansion Options used for configuring Autoflame Water Level Control as well as
Analogue Water Level Control.
# Default Range Description
1
0
WLC: Water Level Control Function
For setting 1, there must be a minimum of two-level sensing elements or a
conflict will appear. The capacitance probes with/without external level
sensor will be commissioned at end of probe, second low, first low, control
point and high water.
0
Water level control disabled
1
Water level control enabled
2
0
WLC: Feedwater Control Element
The feedwater control element will act according to the levels set relative
to the control point, through expansion options 10, 11 and 12.
Setting 0 Feedwater is controlled using pump on/off only.
Setting 1-7 Feedwater is controlled via PID loop, see expansion options
13, 14, 15, and 16.
Pump output terminal: BFW.
Servomotor terminals: P-, FW, P+, MVI, MVD.
VSD terminals: I+, V+ and IV-.
0
Pump on/off only
1
Pump on/off and Servo Control
2
Pump on/off and VSD Control (0-10V / 0-20mA)
3
Pump on/off and VSD Control (4-20mA / 2-10V)
4
Pump on/off and Servo Control (0-10V / 0-20mA)
5
Pump on/off and Servo Control (4-20mA / 2-10V)
6
Pump on/off, Servo Control, VSD Output (0-10V / 0-20mA)
7
Pump on/off, Servo Control, VSD Output (4-20mA / 2-10V)
3
0
WLC: Capacitance Probes
If water level control is enabled, the MM will require a minimum of 2 level
sensing elements. For the possible water level sensing device
combinations, please see section 3.3.
0
Capacitance probes disabled
1
One capacitance probe
2
Two capacitance probes
4
0
WLC: External Level Sensor
The external level sensor is wired to terminals EX- and EX+ and will give a
4-20mA signal. The readings can be scaled in expansion options 30 and
31. If an external level sensor is used, then a 4-20mA signal for fuel flow
feedback cannot be enabled (option
57) and fully metered combustion
control cannot be enabled (expansion option 140). For the possible water
level sensing device combinations, please see section 3.3.
0
External Level Sensor Disabled
1
External Level Sensor Enabled
5
0
WLC: Auxiliary Alarm Inputs
For setting 1, the auxiliary alarm mains inputs terminals HAI, 1AI and 2AI
are used in addition to the capacitance probes with/without external level
sensor readings. For the possible water level sensing device
combinations, please see section 3.3.
0
Auxiliary alarm inputs disabled
1
Auxiliary alarm inputs enabled