AUTOFLAME Mk8 MM User Manual

10 Water Level Control
Mk8 MM Manual Page | 163
# Default Range Description
23
300
WLC: Shunt Switch – Time to 2
nd
Low
After the shunt switch has been tested for first low, there is further time
delay for the water to reach the second low level, allowing the operator to
further decrease the water level. This test checks the second low alarm
while the burner continues to op
erate. If water does not drop to the
second low level in this time period, the burner will turn off.
30 – 600
Seconds
24
5
WLC: Sudden Pressure Drop Trigger Rate
If the pressure drops by this value set over 3 seconds to a pressure below
the reset offset from the required pressure setpoint set in expansion
option 26, then a sudden pressure drop condition is detected and the
control point will increase by a percentage set in expansion option 25.
1 – 100
PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load
detector set in option 1 and metric/imperial units set in parameter 40)
25
25
WLC: Sudden Pressure Drop Control Point Increase
If a sudden pressure drop is detected, the water level control point will
increase to the percentage of the control point set. Once the steam
pressure increases to the reset offset value from the required pressure
setpoint, the control point will return to the commissioned value. See
expansion options 24 and 26.
0
Disabled
1 – 75
1% - 75%
26
10
WLC: Sudden Pressure Drop Reset Offset
If the pressure drops by the value set in expansion option 24 over 3
seconds to a pressure below this reset offset from the required pressure
setpoint, then a sudden
pressure drop condition is detected and the
control point will increase by a percentage set in expansion option 25.
0
Disabled
1 – 100
PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on load
detector set in option 1 and metric/imperial units set in parameter 40)
27
30
WLC: Probe Mismatch Threshold
The probe mismatch threshold is a percentage of the first low. If the
probes and/or external level sensors read a difference in the level greater
than this value
set for 30 seconds, then a probe mismatch alarm will
occur.
5 – 100
5% - 100%
28
3
WLC: Capacitance Probe Still Water Threshold
This threshold set is the distance between the high peak and low peak of
the water wave signature. If the
capacitance probes detect a reading
between the high peak and low peak which is less than this value for 30
seconds while the burner is firing, a capacitance probe still water alarm
will occur.
0
Disabled
1 – 100
1 – 100mm or 0.0 – 3.9” (see parameter 40)
29
10
WLC: Capacitance Probe Filter Time
The filter time is the rolling time period over which the capacitance probes
take the water level reading. When a moving water level is detected this
time period reduces in proportion linearly to the movement.
1 – 30
Seconds

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English