Bartec APEX (APC) 07-3704 Series, Operating Instructions Manual

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Operation
APEX / SILAS
Pressurized Cabinet
Page 32 of 40 01-3704_7D0001_Manual_APC-SPC_20200617_jrs_en.docx Rev.-
Purging time
CONSTANT PURGING AIR SUPPLY
When counting down the purging time it is important that the
available purging air is constant in terms of pressure and flow.
Otherwise, the purging time may be reset automatically.

Pay attention to the purging air supply and its layout
The APEX (SILAS) pressurized cabinet can have a manual or automatic purging
time calculation.
It is delivered as standard with a manual purging time. In the version with
automatic purging time calculation, this is shown on the type plate.
Manual purging time
In the case of manual purging time, the corresponding Ex p control unit has a
permanently set purging time which only expires once the corresponding flow
rate has been reached and the corresponding parameters have been exceeded.
Automatic purging time
In the case of automatic purging time, the parameters of volume and applied
outlet are stored in the Ex p control unit. During the booting of the Ex p control
unit the purging air flow rate achieved during the first 10 seconds is determined
and the corresponding purging time calculated, set and run. After expiry of the
purging time, the Ex p control unit is in normal operating mode.