Bosch D263THC User Manual

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Fire Alarm Systems | D263 Series Photoelectric Smoke and Smoke and Heat Detectors
The D263 Series includes the following detector models:
Two-wire with 135°F (57°C) heat sensor
Two-wire with 135°F (57°C) heat sensor and auxiliary
Two-wire with 135°F (57°C) heat sensor and sounder
* Sounders produce 85 dB at 10 ft (3 m).
Each of the D263 Series Detector models is UL Listed and
works with commercial fire protective signaling and
household fire warning systems. Each model detects smoke
particles produced during wood, paper, and fabric
System Overview
The D263 Series Detector models use an infrared (IR) LED
light source and a silicon photodiode to measure light in a
chamber. A fine screen covers the chamber to deter insects
and to reduce dust accumulation and nuisance alarms.
During a fire, smoke particles reflect light onto the
photodiode. When the photodiode measurements exceed
the alarm threshold, the detector signals an alarm
condition. After the alarm condition clears, interrupt power
at the control panel to reset the detector.
Use a D132B Reversing Relay Module to activate the
sounder (85 dB at 10 ft [3 m]). When using a D132B, the
LED does not latch on alarm.
Chamber Calibration Tests
Check the sensitivity and calibration of any D263 Series
Detector model using a visual check, a magnet test, or a
voltage measurement test.
Visual check:
When the detector’s calibration is within the factory-listed
range, the red alarm LED flashes once every 3.5 sec.
If the detector’s calibration is out of range for more than 24
h, the red alarm LED flashes once a second.
Magnet test:
Hold a magnet horizontally against the detector for about
10 sec and observe the LED.
If the detector is within the factory-listed calibration
range, it goes into alarm and the Alarm LED latches on.
If the detector is too sensitive, the LED rapidly flashes
six times (once every half second) and the detector
goes into alarm.
If the detector is not sensitive enough, the LED slowly
flashes four times, once every 2 seconds, and the
detector goes into alarm.
D263 Series Photoelectric Smoke and
Smoke and Heat Detectors
▶ 12 V or 24 V input
▶ Designed for commercial or residential use
▶ Two-wire application
▶ Light-emitting diodes (LEDs) indicate the status of the
chamber, power, and alarm
▶ Removable terminal block to simplify wiring
▶ Cable connection point for voltmeter sensitivity test
▶ Trim Plate TP280 for retrofit and remodeling purposes