NEX7250 Zone 2 Annunciator
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31. Commissioning
A qualified technician properly trained and authorised to work with this type of equipment should
carry out commissioning and servicing operations. The following procedure is a summary of the
steps normally taken when installing an alarm system. This is the absolute minimum requirement and
will generally be supplemented by a number of additional checks relating to the particular application
and installation.
STEP
FUNCTION
1
Check all external customer connections to the annunciator are free from earth faults.
2
Ensure the annunciator has been correctly earthed using appropriate sized cable.
3
Check that all customers wiring added during installation is secure and correctly wired.
4
Apply a 24vdc logic supply and check that the power on LED illuminates correctly.
5
Press the system test pushbutton to check that all active alarm channels flash and the
audible alarm sounds in accordance with the programmed sequence.
6
Press the remaining pushbuttons required to control the programmed sequence.
7
Refer to the section on programming and check that all of the required functions have been
correctly set.
8
Initialise each channel one by one from the field device to check that the laser printed film
legend and filter colour matches the associated process.