11. Open the control panel and switch DIP switch #3 to the off
position and close control panel.
12. Reconnect main power.
The unit is now set and will remain set with the selected
temperature scale until the above steps are repeated.
Seal Saver™
Each unit has a Seal Saver program built into the controller that
can be activated when turning off the unit. This software is
designed to reduce water temperature before the unit shuts off
to extend the life of the seal. Here is how to activate this feature:
1. Press the Start button and while holding in the Start button,
momentarily press the Stop button. Both keys can then be
released.
2. The solenoid valve will remain open, bringing cool water to
the unit. This will continue until either the temperature of the
water reaches 90°F (32°C) or for 120 seconds, whichever
occurs first.
3. Once activated, the Stop LED will flash and the Set Point
display will toggle between the actual set point and the 90°F
(32°C) Seal Saver cool down value. The actual set point can
be changed at this time if desired.
4. When the water reaches 90°F (32°C) or 120 seconds have
elapsed, the control will enter the normal stop mode. The
Stop LED will discontinue flashing and the Set Point display
will revert to the actual set point value.
5. Seal Saver will not activate if the Process Temperature is less
than 90°F (32°C). If the Stop button is pressed at any point
during Seal Saver operation, the unit will stop all operation. If
the Start button is pressed at any point during Seal Saver
operation, the unit will return to normal running operation, at
the original set point.
6. Seal Saver will not activate under the following circum-
stances: Auto Tune is running, the first 60 seconds of
operation, or if the set point is under 90°F (32°C).
This process must be repeated every time you wish to activate
Seal Saver. To deactivate Seal Saver, change the configuration
DIP switch #2 to the "Off" position.
Auto Tune
In most cases, the standard program entered into the
microprocessor controller at the factory provides excellent
temperature control; however, there are occasions where a
particular application may require additional fine-tuning of the
control parameters. To make this procedure as simple as
possible, this controller has been equipped with an Auto Tune
function.
The Auto Tune function is designed to automatically select the
best control parameters based upon the particular system that
the unit is connected to. At the factory, certain parameters have
been limited so that the Auto Tune program cannot select val-
ues that could cause damage to certain components. The fol-
lowing procedure should be followed if there is a need for the
Auto Tune program to be run.
Note: Do not use the Auto Tune function until it is verified
that the unit is operating normally and there is not a failure
of a component. Make sure that the lines are properly sized
and there is sufficient incoming water pressure. If the
application is for heating, other changes are needed and
you should contact our Tech Service Department.
1. Make sure that the flow and pressure through the process are
set at the proper levels for that particular installation. Poor
temperature control accuracy is often caused by low coolant
flow through the process.
2. The Auto Tune program must be run with no heat load being
added by the process. The program may take up to 30
minutes to run.
3. To activate Auto Tune, change DIP switch #8 to the "On"
position.
4. The unit must be in the stop mode and the process
temperature must be at ambient.
5. Hold the Start button down for 7 seconds.
6. The Auto Tune program will abort under these conditions:
a.
Pressing the Stop button while Auto Tune is in progress.
b.
If the temperature difference between the process value
and the set point is less than 8°F (4.5°C ) after the vent
sequence.
c.
The software is unable to obtain a good approximation
of the PID parameters after 30 minutes has elapsed.
This condition can occur if the control loop was dis
turbed by external elements or if the control elements
are faulty.
If any of the above conditions occur, the previous control
parameters will be restored.
7. To abort the Auto Tune program at any time, press the Stop
button, and the previous control parameters will be restored.
© Copyright 2010 IMS Company. All rights reserved.
An ISO 9001:2008 Registered Quality Company
10
Seal Saver™
is a trademark of Thermal Care
