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en | Description
2
Description
2.1
Overview
The D340 Duct smoke housing is designed to mount to the ducts of heating, ventilation, and
air-conditioning (HVAC) systems to monitor the presence of smoke in the conditioned air. It
operates on a two‑wire loop, and requires a smoke detector head.
Use the housing with the D285DH Duct smoke head (provided separately or with the D340P
kit). The detector is combined with an efficient housing design to sample the air passing
through a duct and detect potentially hazardous conditions. When it detects smoke, the
detector sends an alarm signal to the control panel. The control panel initiates the necessary
action to shut off fans and blowers or to switch to other air handling systems.
Test the system by placing an external magnet on the housing or by turning the D344‑RT's key
switch to TEST. Reset control requires a 24 V supply from the control panel or an external
power supply.
You can reset the detector by shutting down zone power. If your system has a D344‑RT
Remote test/indicator plate, you can reset the system using the key switch.
The D340 includes:
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The D340P also includes a smoke detector head and 1.5 ft (0.5 m) tube.
2.2
Compatibilities
Bosch Security Systems, Inc. (Bosch) makes no claim either written, oral, or implied that the
D340 Duct smoke housing with its associated D285DH Duct smoke head works with any
control panel other than those listed in the Two‑wire Smoke Detectors Technical Service Note
that covers the following products:
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Two‑wire smoke detector compatibility information is available in the documents for this
product on our website (www.boschsecurity.com).
The D340 Duct smoke housing with its associated D285DH Duct smoke head are compatible
with the following accessory products:
Accessory products
Active:
D344-1.5 Sample tube, duct 1.5ft/45.7cm
D344-3 Sample tube, duct 3ft/91.4cm
D344-5 Sample tube, duct 5ft/152cm
D344-RL Remote indicator plate
2017.04 | 7.0 | F.01U.071.685
One housing, power card, and cover assembly
Two #10-24 x 1 in. machine screws for mounting
Two #10-24 jack nuts
One exhaust tube
Two tube clamps with four screws
Two foam gaskets
Two air filters
One drilling template
One cover gasket
D285, D285TH, D285DH, D286, D263, D263TH, D263THC, D263THS smoke detectors
D603, D604, D605 heat detectors
D340 Duct smoke detector housing
Installation manual
Duct smoke housing, 2-wire
Bosch Security Systems, Inc.
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