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2009 Nalco Company
5-4
Technical Help
(630) 305-CHEM
3D TRASAR
5500 - Installation & Operation Manual
5.2.2 Start-Up Procedure for 1-Drum 3D TRASAR Scale Blowdown Control (con’t)
Upload the new configuration to the 3D TRASAR controller.
• The Configurator program should request an automatic “REBOOT” of the controller.
If not – reboot manually either by using the power switch or through the Configurator: go to “Con-
troller” —> “Tools” —> “Reboot Controller”.
• After the controller reboots – go to the Configurator
Control Settings
window, under the
Blowdown/pH
tab, click the
RELEARN NOW
button to perform a Relearn. This will clear the
memory of learned scaling stresses and start the new Learning Period.
• The number of cycles in the “Learning Period” is automatically calculated and varies based on the
user input
HTI.
• The system is now under
3D TRASAR Scale Blowdown Monitoring Mode
. Note: The blowdown
set point will NOT be adjusted based on NSI until Step 3.
Note
: The controller LCD will show dashes (- - -) for NSI, and the data log will show a value of
–999
for NSI until the required “Learning Period” is completed. The “Learning Period” will last between 7
to 8 HTI’s if the system HTI is < 72 hours, and 22 days if the HTI is > 72 hours. The “Learning
Period” is over when NSI values start to appear.
STEP 3 - Switch to 3D TRASAR Scale Blowdown Control Mode
• Product feed pump remains connected to TAG POLYMER control Relay # 2.
• Blowdown valve remains connected to BLOWDOWN control Relay # 6.
• In the Configurator
Control Settings
window:
1. Click the
Blowdown/pH
tab, leave the
Blowdown Control Method
in
3D Scale Control
.
2. Under
3D TRASAR Scale Control Settings
, click the
Setpoint Limits
button.
3. Enter
0%
for
Setpoint Increase Limit
,
30%
for
Setpoint Decrease Limit
, and click
OK
.
4. After returning to the
Blowdown/pH
page, uncheck the
Monitor Only (Setpoint does not
change)
box.
• Do NOT change any other settings.
• Upload the modifications to the 3D TRASAR controller.
• The system is now
under 3D TRASAR Scale Blowdown Control
.
IMPORTANT:
The blowdown set point will now be decreased by as much as 30% in
response to high system stress but will NOT be allowed to go above the user-entered set
point since the “Set Point Increase Limit” is 0%.
!
STEP 4 - Advanced 3D TRASAR Scale Blowdown Control Mode
• In the Configurator
Control Settings
window:
1. Click the
Blowdown/pH
tab, leave the
Blowdown Control Method
in
3D Scale Control
.
2. Under
3D TRASAR Scale Control Settings
, click the
Setpoint Limits
button.
3. Enter
10%
for
Setpoint Increase Limit
,
30%
for
Setpoint Decrease Limit
, and click
OK
.
4. After returning to the
Blowdown/pH
page, uncheck the
Monitor Only (Setpoint does not
change)
box.
• Do NOT change any other settings.
• Upload the modifications to the 3D TRASAR controller.
• The system is now under
Advanced 3D TRASAR Scale Blowdown Control
mode.
IMPORTANT
: The blowdown set point will now be decreased by as much as 30% in
response to high system stress AND will be allowed to go above the user-entered set point
by as much as 10% in response to low system stress.
!
