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Fire Alarm Systems | D341 Four‑wire Duct Smoke Detector Housings

D341 Four‑wire Duct Smoke Detector

Housings

www.boschsecurity.com

u For 1 ft (30.5 cm) 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)

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

The D341 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 VAC or 120 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

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.

Summary of content (3 pages)

PAGE 1
Fire Alarm Systems | D341 Four‑wire Duct Smoke Detector Housings D341 Four‑wire Duct Smoke Detector Housings www.boschsecurity.com The D341 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 VAC or 120 VAC, UL Listed four‑wire control panels. The efficient housing design samples the air passing through a duct and detects potentially hazardous conditions.
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| D341 Four‑wire Duct Smoke Detector Housings Certifications and approvals Region Certification USA UL UROX: Smoke-Automatic Fire Detectors (ANSI/UL 268) and UROX7: Smoke-Automatic Fire Detectors Certified for Canada (CAN/ULC-S529) CSFM see our website HKFSD J-500/C/030 Hong Kong Installation/configuration notes Compatible Products The following products are compatible with the D341 Family Four‑wire Duct Smoke Detector Housings: 1 Hardware pack 1 Literature pack The D341P Duct Photoelectri
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| D341 Four‑wire Duct Smoke Detector Housings Accessories SMK‑TM Test Magnet Used to test detectors Order number SMK-TM Represented by: Americas: Bosch Security Systems, Inc. 130 Perinton Parkway Fairport, New York, 14450, USA Phone: +1 800 289 0096 Fax: +1 585 223 9180 security.sales@us.bosch.com www.boschsecurity.us Europe, Middle East, Africa: Bosch Security Systems B.V. P.O. Box 80002 5617 BA Eindhoven, The Netherlands Phone: + 31 40 2577 284 Fax: +31 40 2577 330 emea.securitysystems@bosch.