Maintenance / Repair; Performance Check; Testing The Point Detector - Siemens OOH740 Technical Manual

7 Maintenance / Repair

7.1 Performance check

7.2 Testing the point detector

Building Technologies
Fire Safety
The selftest automatically subjects the detectors to an extensive electrical
performance check. Regular performance checks of the detectors are required
nonetheless. This may be done with the test gas or hot air fan depending on the
detector type.
Recommendation:
● Check the devices every year.
● Replace heavily soiled or damaged devices.
● All point detectors should be replaced after 6 to 8 years of service, depending
on the ambient conditions.
● The CO sensor used in the OOHC740 has a maximum service life of 5 years.
When CO-supported parameter sets are activated, a critical warning is
triggered once this period has lapsed.
It can continue to be used as an OOHC fire detector depending on the fire
control panel following reconfiguration to non-CO-supported parameter sets
until the recommended replacement interval of 6 to 8 years is reached.
Depending on the point detector, testing may be performed with one or more of the
following accessories:
● Test gas, optical
– REF8-S (recommended)
– REF8
● CO test gas
– REF8-C (for CO sensors)
● Heat detector tester kit RE7T
● Hot air fan
Collective operation
In collective operation, the point detector OOH740 has a reduced response time for
a period of 3 minutes following the detector line being started up or reset. In this
time, the point detector responds faster to test gas or a hot air fan than in normal
operation.
Once an alarm is triggered on a point detector, the detector line must be restarted.
Only then can the next point detector be tested.
You will find more detailed information in the fire detection system documentation.
See also
2 Test mode on the control panel [➙ 96]
Maintenance / Repair
Performance check
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