Lauda IN 550 XT, Руководство по эксплуатации

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5.9 Degas heat transfer liquid (low boiling point expulsion)
The degas mode is specially provided for temperature control media
in the high temperature range. These may not be used in the
Integral XT with through-flow control. The following are possible
application examples for this function:

When the device is started up for the first time after fill mode.

If foreign substances with a boiling point below 70 °C have
entered the thermostatic circuit and the device was internally
cleaned
Ä
“Internal cleaning” on page 140 beforehand.
The following information is relevant for the Integral XT device with flow
control unit:
n
Set the through-flow control to the "Off" position.
n
Execute the fill mode to remove any air bubbles from the thermostatic
circuit.
n
Ventilate the installation site. Vapors which are hazardous to health could
be produced.
n
Note the maximum working temperature range and the permissible
maximum pressure of the connected consumer.
Protective equipment:
n
Safety glasses
n
Protective gloves
n
Protective work clothing
Principle: Components with a low boiling point which are present in the heat
transfer liquid boil during degassing. The gas can be produced at various
points in the circuit. For example, at the heater or at a throttle point. The
Integral XT device is equipped with a gravity separator upstream of the pump
through which the gas is led into the expansion vessel.
1.
After filling and venting, set the upper temperature limit Tih to 75 °C.
2. Enter a set temperature Tset of 70 °C.
3. Start degas mode.
In the menu, select

Degas mode

Start degas mode .

Degassing starts.
4. The end of degassing is reached when the outflow temperature has
exceeded the set temperature due to self-heating.
5.
End the degas mode with

Degas mode

Stop degas mode .

The device is in standby. All parameters described above are
retained with their current settings.
If necessary, the device carries out the degassing automatically. If the device
detects gas in the hydraulic system, the heating and cooling output is first
reduced or temporarily switched off completely. If the pump pressure drops
sharply (a clear sign of degassing), the pump speed is limited and the pump
may be switched off briefly. When the automatic degassing is finished, the
device resumes its operation automatically.
Degassing mode
Automatic degassing
V4 Integral process thermostats with flow control unit 74 / 171