Lauda PROLINE Edition X P 12 C, Operating Instructions Manual

Page: 80 / 116

Proline Edition X heating thermostats
80
Starting up
YACE0099 / 10/9/2018
Setting the overtemperature cut-off: Recommended setting: 5 °C above
desired bath temperature.
Caution! The overtemperature switch point T
max
is being controlled by
a system that works independent of the internal bath control. The set-
point setting can be limited independently to T
max
with the functions T
ih
and T
il
(

7.8.3).

The cut-off point is displayed in the LED display on pressing the key
.
Changing the overtemperature cut-off point:

For safety, and to guard against unintentional adjustment, the key
must be held pressed during all the following entries. Now, brief-
ly press . The display flashes and the overtemperature cut-off can
be set with the keys or .

Quit the change mode by pressing again or automatically after
5 seconds, while you keep pressed.

This somewhat complicated procedure is intended to prevent unin-
tentional adjustment.
 
Set the overtemperature switch-off point Tmax below the flash point of the heat trans-
fer liquid (

6.4).

The setting range is restricted to 5 °C above the upper limit of the working tempera-
ture range (Tih

7.8.3).



If the bath temperature rises above the overtemperature cut-off:
1. Alarm sounds as dual-tone signal.
2.
tEMNP
for overtemperature appears in the display.
3. The red LED above the fault triangle flashes.

Heater switches off on both poles,

Pump is switched off electronically.

Rectify cause of fault.

Wait until the bath temperature has cooled below the cut-off point or
set the cut-off point higher than the bath temperature. When
tEMNP
is shown in the display:

Unlock with the key.

Unlocking is not possible on the Command remote control!


Before longer periods of unsupervised operation, the overtemperature protection
should be checked. To do this:

Slowly lower T
max
, as described above.

Cut-off at the bath temperature should occur.
Overtemperature
cut-off point
90
°C
Overtemperature
alarm
tEMNP
°C