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Operating manual RM-O-3-D / Technical leaflet no. M375DD8 (05/2018)12
9 Maintenance
Danger!
Danger of electric shock! Do not touch any
live components! Electrical equipment
carries a dangerous electrical voltage.
• Do not open the casing for cleaning.
• Do not use any liquids near the duct
smoke detector.
If the contamination is > 70% (yellow LED is illumi-
nated) the duct smoke detector should be cleaned.
• Clean it with compressed air that is free from oil
or water.
Should this not suffice, the sensor head has to be
replaced (order no. M536HC7).
• Remove contamination from the mesh filter on
the air inlets.
Removing the sensor head
• ①
duct.
• ②
released.
• ③
Fitting the sensor head
• ② ③
• Turn the sensor head on the base to engage it
with the base.
• Turn the sensor head clockwise until it clicks into
place (you should hear this).
Note
A functional test is required when the sen-
sor head has been replaced.
①
②
③
Danger!
Danger of electric shock! Do not touch any
live components! Electrical equipment
carries a dangerous electrical voltage.
• Only skilled qualified electricians are al-
lowed to work on the electrical system.
• Switch off the power supply before work-
ing on any electrical equipment.
Regular care and maintenance ensure operational
readiness, functional reliability and long service life
of the duct smoke detector.
Maintenance must comply with EN 13306 and DIN
31051.
The system owner is responsible for maintenance.
The system owner is responsible for creating a
maintenance plan, for defining the maintenance
goals, and for the functional reliability of the equip-
ment.
Maintenance
The sensor head has to be replaced after 8 years
All the other parts of the RM-O-3-D duct smoke
detector are not subject to wear and hence mainte-
nance-free.
Inspection
Duct smoke detectors must be inspected before
commissioning and after any modification.
After that, the functional reliability of the duct
smoke detector has to be examined with a test gas
or smoke at least every 12 months. Local require-
ments and building regulations must be complied
with.
The test of every duct smoke detector must be doc-
umented and evaluated. If the requirements are not
fully met, suitable remedial action must be taken.
Repair
For safety reasons, repair work must only be car-
ried out by expert qualified personnel or the
manufacturer. Only original replacement parts are
to be used. A functional test is required after any
repair, see "Functional test/
commissioning" on page 11.
10 Cleaning