Bosch D261AW, D261W, D290 Installation Manual
D250A/D253/D261AW/D280A/D290 Series
Installation Instructions
12 VDC/24 VDC
EN
Smoke/Heat Detector
Bases
EN | 2 1. D250A/D253/D261AW/D280A/D290 Series | Installation Instructions | 1.0
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
Bosch Security Systems, Inc. (Bosch) is not
responsible for improperly installed, tested, or
maintained D253/D261AW/D280A Series Smoke
Detector Bases.
equipment. Failure to follow these
instructions can result in the detector not
initiating an alarm condition.
2.0 Installation Standards
Seal all field wire openings with a
nonflammable sealing compound such as
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.
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.
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.
4.0 12 VDC Smoke Detector
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.
Bases
4.1 Installing 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.
4.2 12 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.
2 Bosch Security Systems, Inc. | 12/07 | F01U035643-06
D250A/D253/D261AW/D280A/D290 Series | Installation Instructions |
.
Figure 1: D261AW Smoke Detector Base Wiring
1
5
6
5
12
1 - D261AW Smoke Detector Base
2 - Initiating loop negative (-)
3 - From the previous smoke detector base or FACP
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.
2
5
6
12
4
2
4
4- Initiating loop positive (+)
5 - End-of-line resistor
5.0 24 VDC Smoke Detector
Bases
5.1 Installing 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.
3
Do not loop wires around the terminals.
Cut the wire and make individual in and
out connections.
5.2 24 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 3
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