Huber MPC Minichiller 280, Manual

Page: 38 / 60

Setup mode
OPERATION MANUAL Chapter 4
Minichiller®
V2.4.0en/09.08.21//1.30
38
4.1.3.2 Setting the overtemperature protection
You need a screwdriver (flat blade 1.0 x 5.5) to set the cut-out value of the overtemperature pro-
tection.
PROCEDURE

Use a screwdriver to set the cut-off value on the potentiometer. The cut-out value must be set to
match the thermal fluid you are using. It is not required to switch on the temperature control
unit.
4.1.4 Testing the 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!
The overtemperature protection is installed only in temperature control units that have a heater.
You need a sufficiently large-sized screwdriver to check the overtemperature protection for func-
tionality.
Steps to test the correct functioning of the overtemperature protection:
PROCEDURE

Note down the cut-out value of the overtemperature protection set on the potentiometer.

Switch on the temperature control unit.

Enter a setpoint (room temperature). → Page 36, section »Set/change setpoint« .

Start the temperature control process by pressing the >Start/Stop button< [E].

Use a screwdriver to set the new cut-off value on the potentiometer. This cut-out value must be
below the indicated internal temperature. The overtemperature protection is triggered.

Turn off the temperature control unit.

Use a screwdriver to reset the cut-off value on the potentiometer to the original value.
Immediately take the temperature control unit out of operation if the overtemperature protection
is not triggered. Immediately contact Customer Support. → Page 58, section »Contact data« . Do
not put the temperature control unit back into operation.
Setting the
cut-out value