AUTOFLAME Mk8 MM User Manual

11 Top Blowdown
Mk8 MM Manual Page | 206
11.2 Top Blowdown Expansion Options
The table below shows the expansion options which need to be set for Top Blowdown Control.
# Default Range Description
40
0
TBD: Top Blowdown Function
To enable top blowdown, the top blowdown expansion feature must be
unlocked. The TDS value in the water, measured by the TDS probe on
terminals 3P+, 3P-, 3T+ and 3T-
, is maintained by a PID loop, see
expansion options 52, 53 and 54. For setting 1, the terminal TB output will
open and close an external solenoid valve. For setting 2, the top
blowdown valve is open and closed via a top blowdown servomotor on
terminals P-
, FW, P+, TBI and TBD. For setting 3, continuous top
blowdown management is enabled for the top blowdown. For setting 4,
the TDS probe is used for water hardness monitoring only.
0
Top blowdown disabled
1
Top blowdown using solenoid
2
Top blowdown using servo (2-state)
3
Top blowdown using servo (continuous)
4
Water Hardness Monitoring
41
0
TBD: TDS Units
The TDS units can be displayed in ppm or µS/cm.
0
Concentration in ppm
1
Conductivity in µS/cm
42
2500
TBD: TDS Target
This is the set TDS target value which the TDS control will try to maintain
by open and closing the solenoid or top blowdown valve, see expansion
option 40. The target TDS value should be set according to the boiler
manufacturer’s guidelines.
50 – 9999
ppm or µS/cm (see expansion option 41)
43
180
TBD: TDS Temperature Compensation
The steam temperature is calculated from the steam pressure sensor
reading. The TDS value read will be corrected by the % per
O
C set, for the
difference between the steam temperature and 25 degrees
O
C, so the
TDS measured value displayed is shown corrected to 25 degrees
O
C. This
temperature compensation coefficient will depend on the contaminants in
the water and should be set accurately for the contaminants that make up
the TDS in the water.
20 – 1000
0.20 – 10.00% per
O
C
44
65
TDS PPM Conversion
The ppm to µS/cm conversion coefficient will depend on the contaminants
in the water and should be set accurately for the contaminants that make
up the TDS in the water.
20 – 100
0.20 – 1.00ppm / (µS/cm)
45
1000
TBD: TDS Adjustment
This value will automatically display the adjustment factor when the TDS
probe is recalibrated during running.
10 – 999
0.010 – 9.999

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English