AUTOFLAME Mk8 MM User Manual

11 Top Blowdown
Mk8 MM Manual Page | 213
11.5 Configuration
11.5.1 Wiring
The table below indicates the terminals on the Mk8 MM allocated for Top Blowdown control.
Terminal
Description
P-
0V supply to top blowdown and feed water servomotors
TW
Signal from top blowdown servomotor, indicating position
P+
+12V supply to top blowdown servomotors
3P+
+9V supply to TDS probe
3P-
0V supply to TDS probe
3T+
Digital communications connection from TDS probe
3T-
Digital communications connection from TDS probe
TB
Switched neutral – top blowdown contactor
TBI
Switched neutral – drives top blowdown servomotor clockwise
TBD
Switched neutral – drives top blowdown servomotor counter clockwise
11.5.2 Top Blowdown PID Controller
Top Blowdown control only makes corrections to the open time of the valve (solenoid valve, 2-state
servomotor or modulating servomotor) during blowdown time when the TDS level is within the P band
(Proportional Band set in expansion option 52).
If the current TDS level is above the P band level, the valve (solenoid valve or 2-state servomotor or
modulating servomotor) will remain fully open.
In systems with fast changing TDS level and to increase the TDS control responsiveness, the I term (Integral
time set in expansion option 53) can be decreased.
To prevent overshoot, a D term (Derivative time set in expansion option 54) can be set according to the
system requirements.

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English