Safety Related System Characteristics; Response In Operation And Fault Conditions - Pentair DIGITRACE NGC-20-C-E Installations-, Betriebs- Und Wartungsanleitung

4.6.4 safety related system characteristics

4.6.5 Response in operation and fault conditions

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The failure types of; sensor break, sensor short, sensor misconnected and random
hardware failure are permanently monitored.
The response in operation and fault conditions is described in the operating manual. The
necessary functional tests are described in paragraph 4.5.3 of this operating manual.
The test to be applied in a fault condition is described in paragraph 4.5.2 of this operating
manual.
A functional test must be carried out after commissioning, repair to the safety system,
or an alteration of safety-related parameters. If a fault is detected in the course of a
functional test, then measures must be implemented to restore the reliable functionality
of the safety system. This can, for instance, be achieved through replacement of
the control unit. It is recommended that the tests that have been carried out are all
appropriately documented.
ImPoRTAnT noTICE
In case a failure of the safety system is detected either during operation or during
routine maintenance when executing a function test the unit should be switched off
and taken out of service. Defects in the safety system cannot be repaired in the field.
Defective units are to be replaced and returned to the manufacturer for investigation.
Please contact your nearest Pentair Thermal management representative for more
instructions. A list of worldwide representations can be found on the last page of this
document or on www.pentairthermal.com.
ZIEGLER ENGINEERING
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info@ze-gmbh.de
NGC-20 INSTALLATION MANUAL