1.
Press and hold down the T
max
key Ä Chapter 6.4 “Setting Tmax”
on page 92.
The values T
max
and T
maxTank
appear on the display.
2. With the arrow keys select the T
max
value, while keeping the T
max
key
pressed down.
3. Press the Enter key.
The entry window appears. The cursor flashes under the T
max
value.
4. Use the arrow keys to set a value that is a few °C above the set
temperature Tset.
If you release the T
max
key the process is aborted.
5. Press the [OK] to confirm the new value.
6. Press [ANW] softkey to confirm the new value.
The new value is active.
7. Now set the set temperature T
set
higher than the overtemperature
switch-o point T
max
. Press [OK] to confirm the set temperature.
The devices heats up. The device switches o when the overtem-
perature switch-o point is exceeded. A fault is displayed.
8. Using the T
max
key, set the correct T
max
value again.
In the display the set T
max
value is displayed.
9. Delete the fault in the device menu.
9.7 Checking the low-level protection
An alarm signal sounds before the liquid level decreases so much that the
heater is no longer covered completely with liquid. Low level appears on the
display. The electronics system switches o the device components.
WARNING!
Contact with hot or cold heat transfer liquid
Scalding, cold burns
Bring the heat transfer liquid to room temperature before
draining.
An alarm must sound as soon as the minimum level is reached.
Fig. 87: Display Tmax
Fig. 88: Enter Tmax
V6 Integral Process Thermostats and High-Temperature Thermostats 145 / 198
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