Setup mode
Chapter 4
OPERATION MANUAL
V2.3.0en/07.06.19//17.12
Unichiller®
49
Read the safety warning and confirm by tapping on “OK”.
Read the Note and confirm by tapping on “OK”.
Tap on the dialog entry “OT limit: heating”.
Confirm your choice by tapping on “OK”.
Tap on the temperature format set by you in the controller (green text).
Enter the displayed red safety code using the number keypad that appears.
Enter the value for the “Heating OT value” using the numeric keypad that appears. This value
must be 25 K below the combustion point of the thermal fluid you are using.
Confirm your entry by tapping on “OK”.
4.1.4.3
Setting “Process Safety”
You have two options.
“Stop” in accordance with DIN EN 61010
Once the overtemperature protection cut-out value is reached, the temperature control unit (heat-
ing, cooling circuit and circulation pump) switches off (default setting).
“Process Safety”
Once the overtemperature protection cut-out value is reached, the heater switches off and the
cooling circuit and circulation pump continue to operate. In case of an emergency (possible exo-
thermic reaction), the full cooling capacity is thus available. Please make sure that the automated
compressor is set to
Permanently ON
([System Settings] > [Power/ECO Settings] > [Compressor
ON/OFF/AUTO] > [Permanently ON]).
PROCEDURE
Go to the “Categories Menu”.
Tap on the category “Safety”.
Tap on the category “Process Safety”.
Read the safety warning and confirm by tapping on “OK”.
Choose between the modes “Stop” and “process safety”.
Confirm your choice by tapping on “OK”.
4.1.4.4
Monitoring via “Display OT values”
PROCEDURE
Go to the “Categories Menu”.
Tap on the category “Safety”.
Tap on the category “Display OT values”.
You will receive an overview of the current measured temperature value of the overtemperature
protection sensor, the set cut-out values and the set cut-out mode (Process Safety). Some tem-
perature control units have 2 overtemperature protection sensors, and so 2 values are shown for
these temperature control units.
Tap on the “OK” touchbutton after you have read/checked the information.
4.1.5
Testing overtemperature protection for functionality
Overtemperature protection (OT) does not trip
MORTAL DANGER FROM FIRE
Test the response of the device every month and after each change of the thermal fluid in
order to assure proper functioning.
The steps below are carried out without permanent monitoring of the temperature control unit
DAMAGE TO AND IN THE VICINITY OF THE TEMPERATURE CONTROL UNIT
The following actions may only be carried out while constantly monitoring the temperature
control unit and the application!
Run the te
st only if the temperature of the thermal fluid used is about 20 °C. You must NOT leave
the temperature control unit unattended
during the entire test of the overtemperature protec-
tion.
The Pilot ONE controller contains a description for carrying out the overtemperature protection test.
