Setup mode
Chapter 4
OPERATION MANUAL
V1.2.0en/12.05.15//14.06
Liability for errors and misprints excluded.
Unistat® T300 Series
43
4.1.2.3
Setting “OT expansion vessel”
PROCEDURE
Go to the “Categories Menu”.
Tap on the category “Safety”.
Tap on the category “Overtemperature”.
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: Expansion vessel”.
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 numeric keypad that appears.
Enter the value for the “Exp. vessel OT value” using the number keypad that appears.
Confirm your entry by tapping on “OK”.
4.1.2.4
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”.
4.1.2.5
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.