Bartec APEX (APC) 07-3704 Series, Руководство по эксплуатации

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APEX / SILAS
Pressurized Cabinet
Operation
Rev. - 01-3704_7D0001_Manual_APC-SPC_20200617_jrs_en.docx Page 33 of 40
Bypass operation
DANGER
COMMISSIONING WITH BYPASS KEY SWITCH IN EXPLOSIVE ATMOSPHERE
Risk of explosion!

Have the commissioning with a bypass key switch approved by the
factory manager or his appointee. Approval may only be given if it has
been ensured that there will not be any explosive atmosphere for the
duration of the commissioning or if the necessary precautions have
been taken to protect against the risk of explosion (fire permit).

A warning sign informing that the Ex protection will be invalidated if
the key switch is activated must be affixed near the key switch.
During the operating phase it may be necessary to change settings on internally
mounted components. The Ex p control unit provides the bypass function for
this purpose.
If the bypass mode is activated, it must be ensured that there is no explosive
gas in the atmosphere. The concentration of gas in the surrounding atmosphere
must be determined with a gas detector.
Once the bypass mode is activated, the door on the pressurized enclosure can
be opened without interrupting the operation of the internal components. The
required settings can be carried out and, once done, the pressurized enclosure
must be closed again. The operation of the pressurized enclosure is not
interrupted for this duration. The purging phase for the pressurized enclosure is
not repeated.
Procedure:
-
Measure the ambient atmosphere for compliance with safe levels.
-
Activate bypass operation.
-
Open the door of the pressurized enclosure.
-
Perform the required work inside the pressurized enclosure.
-
Close the door of the pressurized enclosure.
-
Deactivate bypass operation.