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7
MAINTENANCE
The control unit automatically indicates the trouble
message for the OOHC941 detector whose smoke
chamber changes to the level where the set sensitivity
cannot be maintained. In such circumstances, the
detector may require replacement.
CAUTION
Under no circumstances is the detector head to be
disassembled. No repairs should be attempted.
DO NOT PAINT
The detector is marked DO NOT PAINT. This is intended
to prohibit painting during routine maintenance of the
occupancy which can affect proper operation of the
detector.
REPLACEMENT OF A DETECTOR IN AN EXISTING
SYSTEM
Detectors with product version
≥
30 (UL268 7th, Isolator
mode) have some minor differences to devices which
were built before product version 30. In case a legacy
Detector needs to be replaced in an existing system,
please follow these instructions.
Alarm Verification:
Legacy Detectors have 3 Sensitivity Settings with
integrated Alarm Verification
2.50 % / ft Threshold, verified
3.00 % / ft Threshold, verified
3.50 % / ft Threshold, verified
Alarm verification is removed in detectors with product
version
≥
30. If the panel configuration remains
unchanged, the alarm verification feature is no longer
available. If alarm verification is required, update the
panel to the latest revision.
Special Application
The Special Applications (Telecommunications) selectable application profile setting shall be used for
environments and applications that are clean with little or no Deceptive Phenomena. Detectors set to the special
application sensitivity are not suitable for use in areas where cooking appliances may be used or in sleeping areas.
If cooking appliances are used within the protected space a normal application mode or configuration must be used
for that area. A normal application mode is other than indicated as Special Application in the “Selectable
Application Profiles” table located in this document. The detector default sensitivity setting is for a normal standard
“office” environment. The special applications setting incorporates a pre-alarm and sensitive alarm levels to
provide a Very Early Waring Fire Detection (VEWFD) alarm level for applications to avoid business disruption.
Typical suitable applications for the special applications Telecommunications’ application profile include:
Telecommunications, Data Centers, IT rooms, Clean Rooms, Laboratories and any clean environment.
Applications not suitable for the special application Telecommunication application profile setting:
The special application mode of operation is not for general use and may be more prone to false alarms if used in
unsuitable environments. Unsuitable environments for the special application setting are: hotels, hospitals, nursing
homes, restaurants, kitchens, condo, auto repair shops, parking garages, industrial production facilities,
warehouses, power generation facilities. Any environment or application which may exhibit deceptive phenomena
(dirt, dust, steam or cooking) is not suitable for the special application telecommunications profile setting. Note:
other “non special applications” selectable application profiles settings are available and suitable for these and
other applications. See the table titled “Selectable Application Profiles” table in this document for options and
application descriptions. Failure to follow these guidelines may result in unwanted nuisance alarms.
Method to configure the detector’s special application sensitivity:
The detector default sensitivity is for a standard “office” environment. For programming and to select the special
application setting / profile (Telecommunications) refer to the specific Siemens compatible fire alarm control panel
operation manual.
In the device line, up to 30 of any compatible devices in polarity insensitive mode with 20 ohms max line resistance
can be isolated between two modules in isolator mode in a Class A Style 6 wiring.
In the device line, up to 30 of any compatible devices in polarity insensitive mode with 20 ohms max line resistance
can be isolated behind one module in isolator mode in a Class B Style 4 wiring.
HLIM isolator module and SBGA-34 sounder base cannot be used in the same loop with the modules in
isolator mode.
