Lauda IN 130 T Operation Manual page 76

Degassing
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We recommend an inert gas blanket for faster degassing of the
IN 2560 XTW Ä Chapter 6.25 "Operation with inert gas blanket"
on page 129.
You can also use compressed air instead of an inert gas for degassing the heat
transfer liquid.
The following parameters are set automatically in degas mode:
The pump is set to level 2 (in IN 2560 XTW/PW: pump level 4). Only
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change the pump level when it is necessary.
Caution when selecting the pump level in connection with pressure-
sensitive consumers (e.g. glass apparatus)!
The heating output is reduced to about 50% of the total heating output
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of the process thermostat.
The cooling unit is switched off. The outflow temperature can rise above
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the set temperature due to the heat input of the pump.
The pump switches briefly off and on again approximately every 45 sec-
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onds.
Do not use pressure control. Note the maximum pressure!
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1. After filling and venting, heat the heat transfer liquid up to 20 K above
the later maximum working temperature.
Enter the new set temperature and confirm it.
2. Start degas mode.
In the menu, select  Degas mode  Start degas mode.

3. The end of degassing is reached when the outflow temperature has
approached the set temperature (< 10 K) and does not continue to
rise.
The end of degassing is also reached when the outflow temperature
has exceeded the set temperature due to self-heating.
4.
End the degas mode with  Degas mode  Stop degas mode.

Integral Process Thermostats and High-Temperature Thermostats
Note the maximum working temperature range of the

heat transfer liquid.
Note the maximum working temperature range of the

connected consumer.
An inert gas blanket can be used to accelerate degassing

in the IN 2560 XTW.
See Ä Chapter 6.25 "Operation with inert gas blanket"
on page 129.
Degassing starts.
In order to facilitate the removal of the low boilers during
degassing, it may be useful to open the tank cover so that the
steam escapes more easily (if necessary, use air extraction). In
this operating status, constantly check the device; make sure to
keep ignition sources away from the filling opening and protect
the operating personnel from splashes (e.g. place the cover diag-
onally on the filling opening). Appropriate protective equipment
or protective clothing must be worn. After the end of degassing,
close the filling opening again with the tank cover.
The device is in standby. All parameters described above are
retained with their current settings.
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