9.
Select the menu items
Fill mode
Water valve
auto
(automatic)
on the operating unit. This is the default setting.
Reaction time:
Continue pumping or refilling until the foaming reaction (usually at the beginning) has
subsided. This usually takes 15 to 30 minutes.
Descaler:
Only permitted: LAUDA descaler with article number LZB 126 (5 kg pack). You must
always follow the safety instructions and the instructions for use on the packaging when
handling the chemical!
Flushing:
Let at least 30 liters of clean water run through the device.
7.6 Checking the overtemperature protection
The device must switch off if the temperature of the heat transfer liquid
exceeds the overtemperature switch-off points T
max
and/or T
maxTank
. The
electronics system switches off the device components.
1.
Press and hold down the T
max
key
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 [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-off point T
max
. Press [OK] to confirm the set temperature.
The devices heats up. The device switches off when the overtem-
perature switch-off 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.
Fig. 82: Display Tmax
Fig. 83: Enter Tmax
V4
Integral process thermostats with flow control unit
130 / 171
