AUTOFLAME Mk8 MM User Manual

13 Draught Control
Mk8 MM Manual Page | 242
13.2 Draught Control Expansion Options
The table below shows the Expansion Options used for Draught Control configuration.
# Default Range Description
80
0
DC: Draught Control Servo Channel
To use a draught servomotor on channel 7 with or without the draught
control function, the draught control expansion feature must be unlocked.
The servomotor is wired to terminals DP-, DP+, DPW, DCI and DCD. For
setting 0 the draught servomotor is optioned off. For setting 1, the draught
servomotor can be set for draught control or just servomotor operation in
expansion option 82.
0
Draught servo disabled
1
Draught servo enabled
81
0
DC: Draught Servo Control Method
0
Autoflame servomotor, 0.1 degree control
1
Autoflame servomotor, 0.5 degree control
2
Industrial servomotor, 0.1 degree control
3
Industrial servomotor, 0.5 degree control
4
IO Unit 4-20mA servomotor, 0.5 degree control
5
IO Unit 4-20mA servomotor, 1.0 degree control
82
0
DC: Draught Control Function
For setting, if the draught servomotor channel is enabled in expansion
option 80, but the draught control is disabled, the servomotor will open
and close according to its commissioned curve, without any corrections to
maintain stack pressure. For setting 2, the MM will make corrections to the
stack damper as the measured stack pressures varies from the
commissioned stack pressure. The draught air pressure sensor is wired to
terminals DT+, DT-, DP- and DP+.
0
Draught control disabled
1
Draught control enabled
83
15
DC: Draught Servo Minimum Angle
A minimum angle for the draught servomotor when the draught control is
enabled in expansion option 82, at all other times other than the closed
position. During commissioning, the servomotor position cannot be set low
than this minimum angle value, except for the closed position.
0 – 90
0
O
– 90
O
84
1
DC: Maximum Compensation
The maximum compensation angle is the percentage of the
commissioned draught servomotor angle. This is the maximum correction
on the stack damper either forwards or backwards, during draught control.
0
10%
1
15%
2
20%
85
5
DC: Delay Before Compensation
This time delay is used for two stages in the burner cycle; once main
flame has been established, the draught control operation will only begin
after this time delay. During firing, correction on the stack damper will only
be made the servomotor is outside of the angle variation tolerance for that
commissioned point, for this time period, see expansion option 86.
1 – 30
Seconds

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English