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en | Testing and maintenance
Notice!
When a detector alarms, the red LED indicator activates and latches to the ON position. Clear
the alarm before proceeding to the next detector.
6.
7.
8.
5.2
Maintenance
Notice!
NFPA Requirement
NFPA-72 requires a semi‑annual visual inspection of detector housings. Clean or replace the
tube filters at this time. If replacement filters are needed, order the D344-TF.
Notice!
Notify all concerned parties before and after completing maintenance on or testing of the fire
alarm system.
Clean the detector and base annually using a vacuum or with clean, dry compressed air.
2017.04 | 7.0 | F.01U.071.685
Switch a signal from a D344-RT (D307) Remote test/indicator plate.
You can reset the detector by momentarily removing power.
For duct detectors with the D344-RT (D307) Remote test/indicator plate installed, reset
by moving the keyswitch to the appropriate position and observing the alarm LED.
Check the overall loading of the alarm loop by measuring the voltage across each EOL
resistor. This voltage should equal or exceed the minimum specified by the control panel
manufacturer.
Installation manual
Duct smoke housing, 2-wire
Bosch Security Systems, Inc.
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