D250A/D253/D261AW/D280A/D290 Series
Installation Instructions
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12 VDC/24 VDC
Smoke/Heat Detector
Bases
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1. D250A/D253/D261AW/D280A/D290 Series | Installation Instructions | 1.0 |
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Trademarks
3M™ Weatherban™ is a trademark of 3M. All rights reserved.
Notice
Use these instructions when installing the D253/D261AW/D280A Series 12 VDC/24 VDC Smoke Detector Bases. These bases are compatible with the Bosch 2000, 7000, 8000, and 9000 Series Fire Alarm Control Panels (FACP).
Devices covered by these instructions have two components: a detector base and a detector head. All devices have an LED indicator.
Install, test, and maintain the D253/D261AW/D280A Series according to these instructions, NFPA 72, local codes, and the authority having jurisdiction (AHJ).
Follow the procedures in these instructions to avoid personal injury or damage to the equipment. Failure to follow these instructions can result in the detector not initiating an alarm condition.
Bosch Security Systems, Inc. (Bosch) is not responsible for improperly installed, tested, or maintained D253/D261AW/D280A Series Smoke Detector Bases.
1.0 Mounting Box
The diameter of each D250A, D253, D261AW, D280A, and D290 Smoke Detector Base is 6 in. (15.2 cm). These bases fit on standard 4 in. (10.2 cm) octagonal mounting boxes, and 4 in. (10.2 cm) square mounting boxes.
2.0 Installation Standards
Seal all field wire openings with a nonflammable sealing compound such as 3M™ Weatherban™ Acrylic Sealant 606NF.
Mount the detectors on walls between 4 in. and 12 in. (10.2 cm and 30.5 cm) from the ceiling or on the ceiling at least 4 in.
(10.2 cm) from the wall.
Ensure the installations conform to the specifications listed in Table 2 on page 7.
The D253/D261AW/D280A Series determines the alarm current. Refer to Table 3 on page 7 for more information.
Wire the detectors as shown in Figure 1 through Figure 4 on pages 3 through 5.
3.0 Testing Instructions
Test the D253/D261AW/D280A Series at installation and every two years thereafter according to
NFPA 72. Test using the D1000 Calibrated Smoke Detector Tester or the D1001 Magnetic Calibrated Test Pole.
4.012 VDC Smoke Detector Bases
4.1Installing 12 VDC Smoke Detectors
When using the 12 VDC smoke detectors with Bosch control panels, you can power the detectors from the control panel’s auxiliary power supply. The Alarm LED, located on the D265AW 12 VDC/24 VDC Smoke Detector Head, flashes to indicate power to the detector. This LED lights steadily to indicate an alarm condition.
4.212 VDC Two-Wire Operation Wiring
Connect the D261AW wiring as shown in Figure 1 on page 3.
For proper detector system supervision, do not loop wires around the screw terminals. Cut the wire and make individual in and out connections.
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Bosch Security Systems, Inc. | 12/07 | F01U035643-06 |
D250A/D253/D261AW/D280A/D290 Series | Installation Instructions |
Figure 1: D261AW Smoke Detector Base Wiring
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1 |
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4
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2 1
2
3
4
1 - D261AW Smoke Detector Base |
4- |
Initiating loop positive (+) |
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2 - |
Initiating loop negative (-) |
5 - |
End-of-line resistor |
3 - |
From the previous smoke detector base or FACP |
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When using the D125B Powered Loop Interface Module, there are a maximum number of 40 smoke detectors per loop. You can install up to five smoke detectors on the D2000 Series Control Panel. Refer to the appropriate detector manufacturer’s installation guide for EOL resistor values.
The D261AW Detector Base does not have Terminals 3 and 4.
5.024 VDC Smoke Detector Bases
5.1Installing the 24 VDC Smoke
Detectors
The Alarm LEDs are located on the D281A, D282A, and D283A 24 VDC Smoke Detector Heads. These LEDs flash to indicate power to the detector and light steadily to indicate an alarm condition.
Do not loop wires around the terminals. Cut the wire and make individual in and out connections.
5.224 VDC Two-Wire Operation Wiring
Connect the D280A wiring as shown in Figure 2 on page 4.
The current for the optional LED must be limited to 20 mA or the detector might be damaged or might not initiate alarms.
Bosch Security Systems, Inc. | 12/07 | F01U035643-06 |
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