Bosch D342, D342P Specsheet

Fire Alarm Systems | D342 Four‑wire Duct Smoke Detector Housings

D342 Four‑wire Duct Smoke Detector
Housings

www.boschsecurity.com

u For 1 ft (30.5cm) to 10 ft (3 m) ducts with air

velocity between 300 ft/min to 4000 ft/min
(1.52 m/s to 20.3 m/s)

The D342 Duct Smoke Detector Housings mount on
the ducts of heating, ventilation, and air conditioning
(HVAC) systems to monitor the presence of smoke in
the conditioned air. The housing works with all 24 VDC
or 24 VAC, 220 VAC, or 240 VAC UL Listed four‑wire
control panels.
The efficient housing design samples the air passing
through a duct and detects potentially hazardous
conditions. When smoke is detected, the detector
sends an alarm signal to the control panel or HVAC
control equipment that initiates the necessary action
to control air handling systems.

Functions

Alarm and Trouble Indication

A D344‑RT Remote Test Kit, a D344‑RL Remote
Indicator Kit, or a DRA‑5 Remote Annunciator can
provide remote LED indication of alarm and trouble
status. The red LED lights for an alarm. An open loop
causes the yellow Trouble LED to light.

Air Sampling

Use the duct detector housings in air handling systems
with ducts between 1 ft (30.5 cm) and 10 ft (3.05 m)
wide and air velocities between 300 ft/min and

u Easy duct tube installation through the housing cuts

installation time.

u Detector test and reset without removing covers

u Clear cover allows quick visual inspection

u Tube filters, dust immune smoke detector, and easy

disassembly for cleaning reduce maintenance time
and cost

4000 ft/min (1.52 m/s to 20.3 m/s). Air is forced into
the detector through an air sampling tube, tested, and
returned to the duct through an exhaust tube
(supplied).
Sampling tubes should extend across the width of the
duct. Bosch Security Systems, Inc. offers sampling
tubes in three different sizes. Combined or cut the
tubes to make other lengths. Sampling tubes over 3 ft
(91.4 cm) must be supported at the end opposite the
duct detector. Sampling tubes are provided with an
end plug that must be installed in the open end.

System Testing

Place an external magnet on the detector housing or
switch a signal from a remote test station to test the
system (requires an external 24 V supply).
Reset the system by power shutdown or if a D344‑RT
is connected, use the key-operated switch.

2 | D342 Four‑wire Duct Smoke Detector Housings

Certifications and approvals

Region Certification

USA UL UROX: Smoke-Automatic Fire Detectors

CSFM see our website

Hong Kong HKFSD J-500/C/030

(ANSI/UL 268) and UROX7: Smoke-Au­tomatic Fire Detectors Certified for Can­ada (CAN/ULC-S529)

Installation/configuration notes

Compatible Products

The following products are compatible with the D342
Family Four‑wire Duct Smoke Detector Housings:

Category Product ID Product Description

Control Panels Works with all 24 VDC or VAC, 220 VAC, or 240 VAC

Detector
Heads

Remote
Annunciators

D344‑RT Remote test kit

DRA‑5 Remote annunciator (5 VDC)

UL Listed control panels

D285‑DH Photoelectric duct smoke detector

head

D344‑RL Remote indicator kit

Remote Indicators

NFPA 72 requires detectors have remote alarm
indicators where duct smoke detectors are installed in
concealed locations, where the detector is more than
10 ft (3 m) above the floor, or where the detector's
alarm indicator is not visible to responding personnel.
The optional D344‑RT Remote Test Kit, D344‑RL
Remote Indicator Kit, or DRA‑5 Remote Annunciator
can be used to satisfy this requirement.

Power Considerations

The detector housing provides one primary power
source of 24 VDC, 24 VAC, 220 VAC, or 240 VAC. Do
not connect a high‑voltage AC source and a
low‑voltage AC/DC source to the same housing.

Parts included

The D342 Four‑wire Duct Smoke Detector Housing
comes with:

Quant. Component

1 D342 Duct Detector Housing

1 Exhaust tube

1 Cover gasket

2 Tube clamps with four screws

2 Foam gaskets

2 Air filters

1 Drilling template

1 Hardware pack

1 Literature pack

The D342P Duct Photoelectric Smoke Detector Kit
comes with all components supplied with the D342
plus:

Quant. Component

1 D285DH Photoelectric Duct Smoke Detector Head

1 D344‑1.5 Sampling Tube

Technical specifications

Electrical

Current (operating): 24 VDC: 65 mA maximum ; 24 VAC: 200 mA

Voltage (operating): 24 VDC, 24 VAC, 220 VAC, or 240 VAC

maximum ;
220 VAC: 30 mA maximum ; 240 VAC: 30 mA
maximum

Environmental

Relative Humidity: Up to 93% non‑condensing

Temperature
(operating):

+32°F to +120°F (0°C to +49°C)

Mechanical

Dimensions
(H x W x D):

Material: High‑impact fire‑retardant polymer plastic

Weight (housing
only):

6.5 in. x 15.5 in. x 4.25 in. (16.5 cm x 39.5 cm
x 11 cm)

3.75 lb (1.7 kg)

Outputs

Alarm: Form A, normally‑open (NO) contacts rated

Auxiliary: Two Form C contacts rated for 10 A at

Trouble: Form A, normally‑closed (NC) contacts rated

for 0.5 A at 24 VDC or VAC and for 0.1 A at
220 VAC or 240 VAC

24 VDC, 24 VAC, 220 VAC, or 240 VAC

for 0.5 A at 24 VDC or VAC and for 0.1 A at
220 VAC or 240 VAC

Ordering information

D342 Duct Detector Housing

Duct detector housing with an exhaust tube, two tube
clamps with screws, one cover and two foam gaskets,
two air filters, a drilling template, installation
instructions and mounting hardware.

Order number D342

3 | D342 Four‑wire Duct Smoke Detector Housings

Represented by:

Americas: Europe, Middle East, Africa: Asia-Pacific: China: America Latina:

Bosch Security Systems, Inc.
130 Perinton Parkway
Fairport, New York, 14450, USA
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.us

Bosch Security Systems B.V.
P.O. Box 80002
5617 BA Eindhoven, The Netherlands
Phone: + 31 40 2577 284
Fax: [phone]
[e-mail]
www.boschsecurity.com

Robert Bosch (SEA) Pte Ltd, Security
Systems
11 Bishan Street 21
Singapore 573943
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.asia

Bosch (Shanghai) Security Systems Ltd.
201 Building, No. 333 Fuquan Road
North IBP
Changning District, Shanghai
200335 China
Phone [phone]
Fax: [phone]
www.boschsecurity.com.cn

Robert Bosch Ltda Security Systems Division
Via Anhanguera, Km 98
CEP 13065-900
Campinas, Sao Paulo, Brazil
Phone: [phone]
Fax: [phone]
[e-mail]
www.boschsecurity.com

© Bosch Security Systems 2014 | Data subject to change without notice
2707670667 | en, V2, 07. Aug 2014

D342P Photoelectric Duct Smoke Detector Kit

Kit comes with a D342 Four‑wire Duct Smoke Detector
Housing, a D285DH Photoelectric Duct Smoke
Detector Head, and a D344-1.5 Sampling Tube.

Order number D342P

Accessories

D344‑RL Remote Indicator Kit

Used with the D340 Series Duct Smoke Detector
Housings

Order number D344-RL

SMK‑TM Test Magnet

Used to test detectors

Order number SMK-TM