AUTOFLAME Mk8 MM User Manual

12 Bottom Blowdown
Mk8 MM Manual Page | 222
12.2 Bottom Blowdown Expansion Options
The table below shows the Expansion Options used for configuring Autoflame Bottom Blowdown.
# Default Range Description
60
0
BBD: Bottom Blowdown Function
To enable bottom blowdown, the bottom blowdown expansion feature
must be unlocked. The bottom blowdown function can be set for up to 10
timed blowdowns over 24 hours. For setting 1, the timed blowdown output
terminal BB is used with an external solenoid valve. For setting 2, the
bottom blowdown control module is used on terminals 5T+ and 5T-, which
is connected to the bottom blowdown servomotor.
0
Bottom blowdown disabled
1
Bottom blowdown using solenoid
2
Bottom blowdown using Autoflame controller
61
0
BBD: Bottom Blowdown Triggering
For setting 0, when the MM does not need a manual trigger for a
blowdown to start when the configured blowdown timing is reached. For
setting 1, a manual trigger is required to start the blowdown when the
configured blowdown timing is reached.
0
Automatic triggering
1
Manual triggering
62
0
BBD: Bottom Blowdown Reduction
If bottom blowdown reduction is enabled, then the timing of the blowdown
will reduce in proportion to the steam production. If there is no steam
production and the configured blowdown timing is reached, then the
minimum time for that blowdown can be set in expansion option 63.
0
Bottom blowdown reduction disabled
1
Bottom blowdown reduction enabled
63
0
BBD: Minimum Blowdown Duration
This is the minimum duration for which blowdown will occur, if bottom
blowdown reduction is enabled in expansion option 62. For setting 0, if
there is no steam production, no blowdown will occur, however if a time is
set, then the minimum blowdown duration will be used when there is no
steam production.
0
Disabled
1 – 60
Seconds
64
0
BBD: Boiler Steam Production Rating
If bottom blowdown reduction is enabled in expansion option 62, then the
maximum steam production rating for that boiler should be set. The
bottom blowdown time is reduced according to the current steam
production and maximum steam production ratio. This will mean that the
blowdown occurs for a shorter time when there is low steam production.
0 – 5000
0 – 500000 kg/hour or 0 – 1102310l lb/hr (see parameter 40)

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English