Bosch D300A User Manual
Conventional Duct Detector
D300A
en Installation Guide
Conventional Duct Detector Table of Contents | en 3
Table of Contents
1Notice 4
2Overview 4
3 Mounting 4
3.1 Preparing the Duct 4
3.2 Verifying Air Flow and Direction 5
3.3 Assembling the Intake Sampling Tubes 6
3.4 Mounting the Intake Sampling Tubes 6
3.5 Mounting the Detector 6
3.6 Verifying the Air Sampling 6
4 Wiring 6
4.1 Testing 8
4.2 Replacing the Detector Head 8
5 Specifications 8
Bosch Security Systems, Inc. Installation Guide F.01U.252.768 | 5.0 | 2011.09
4 en | Notice Conventional Duct Detector
1Notice
Use these instructions when installing the D300A Conventional Duct Detector in a system
controlled by a fire alarm control panel (FACP). Install, test, and maintain the D300A
according to these instructions, NFPA72, local codes, and the Authority Having Jurisdiction
(AHJ).
NOTICE!
– Failure to follow these instructions can cause the device to not properly operate.
– Bosch is not responsible for improperly installed, tested, or maintained devices.
– NFPA 72 requires a complete, system-wide Functional Test be performed after making
modifications, repairs, upgrades, or adjustments to the system’s components, hardware,
wiring, programming, software, or firmware.
– The D300A is not intended for open area protection. Refer to the NFPA90A and NFPA72E
, for general and additional duct smoke detector operation and installation.
DANGER!
Follow the procedures in these instructions to avoid personal injury and/or damage to the
equipment.
2Overview
The D300A Conventional Duct Detector Housing unit is an accessory device complete with a
photoelectric smoke detector head used in HVAC duct works. It can be powered by 24 VAC,
24 VDC, or 115 VAC. Air sampling is accomplished by two tubes that protrude into the duct.
An exhaust tube of one standard length is supplied in the installation kit with the duct
detector housing unit. Once the duct width is determined, the air intake sampling tubes must
be ordered. Sampling tubes are supplied in three standard lengths and cut to size to fit the
duct. The air samples are collected by positive pressure to the detector head. Output
terminals are provided for remote accessories such as remote status indicators (LEDs), reset
keyswitches, and push buttons.
3 Mounting
CAUTION!
To prevent false alarms, do not mount the D300A Duct Detectors in areas:
– of extreme high or low temperatures,
– where high humidity exists,
– where duct air might contain gases or excess dust.
Refer to NFPA90A, NFPA72E, and NFPA101.
3.1 Preparing the Duct
When preparing the duct, refer to Figure 3.1 on page 5.
1. Remove the paper backing from the mounting template included in the Installation Kit.
2. Attach the template to the duct at the desired location.
3. Using the template as a guide, drill four mounting holes (3/32 in. [2.38 mm] diameter) for
the duct mounting screws (four #12 x ½ in. [1.27 cm] sheet metal screws packaged in
installation kit).
4. Drill or punch holes for the sampling tubes in the air duct (1.375 in. [3.49 cm])
5. Clean all holes.
F.01U.252.768 | 5.0 | 2011.09 Installation Guide Bosch Security Systems, Inc.
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