Bosch D340 Manuale utente
Duct smoke housing, 2-wire
D340/D340P
en Installation manual
Duct smoke housing, 2-wire Notices | en 3
Bosch Security Systems, Inc. Installation manual 2017.04 | 7.0 | F.01U.071.685
1 Notices
These instructions cover the installation of the D340 Duct smoke housing and D340P Duct
smoke kit in a fire system supervised by a fire alarm control panel (FACP) or a combination
Burglary/Fire control panel.
Before installing the module, become familiar with the Installation and Operation Guide for the
control panel you are using.
!
Warning!
Follow these instructions to avoid personal injury and damage to equipment.
Install, test and maintain the module according to these instructions, NFPA codes, local codes,
and the authority having jurisdiction (AHJ). Failure to follow these instructions can result in
failure of a detector to initiate an alarm event. Bosch Security Systems, Inc. is not responsible
for improperly installed, tested or maintained devices.
NFPA72 requires that you perform a complete system wide functional test following any
modifications, repair, upgrades or adjustments made to the system’s components, hardware,
wiring, programming and software/firmware.
Trademarks
All hardware/software product names used in this document are likely to be registered
trademarks and must be treated accordingly.
4en | Description Duct smoke housing, 2-wire
2017.04 | 7.0 | F.01U.071.685 Installation manual Bosch Security Systems, Inc.
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 24V 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:
– 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
The D340P also includes a smoke detector head and 1.5ft (0.5m) 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:
– D285, D285TH, D285DH, D286, D263, D263TH, D263THC, D263THS smoke detectors
– D603, D604, D605 heat detectors
– D340 Duct smoke detector housing
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
Duct smoke housing, 2-wire Description | en 5
Bosch Security Systems, Inc. Installation manual 2017.04 | 7.0 | F.01U.071.685
Accessory products
D344-RT Remote test/indicator plate, 24V
D344-TF Duct tube filters, 20pcs
DRA-5 Remote indicator plate, 5V
PAM-4 Relay module, form C, 10A 12/24V
Legacy:*
D306 Remote Indicator Plate
D307 Remote Test and Indicator Plate
SMK-TM Smoke Test Magnet
* Legacy products are not available for purchase.
2.3 Setting the jumpers
For the locations of the tamper jumper and reset jumper on the power card, see the following
figure.
Figure2.1: Jumper locations
1 Power card 2 Tamper jumper
3 Reset jumper
The tamper jumper enables or disables the housing cover tamper switch. When this jumper is
enabled, a trouble is indicated if the cover is removed. The reset Jumper enables or disables
the remote reset (D344-RT keyswitch). The power off reset from the control panel zone
functions normally regardless of the jumper setting.
Notice!
Disable the reset jumper whenever you are not using the D344-RT (D307).
6en | Description Duct smoke housing, 2-wire
2017.04 | 7.0 | F.01U.071.685 Installation manual Bosch Security Systems, Inc.
For enabled and disabled jumper positions, see the following figure.
Figure2.2: Jumper settings
1 Disabled 2 Enabled
Duct smoke housing, 2-wire Mounting | en 7
Bosch Security Systems, Inc. Installation manual 2017.04 | 7.0 | F.01U.071.685
3 Mounting
3.1 Preparing the duct
Before installing the duct detector, you must verify the duct air flow and velocity. The detector
is designed for use in air handling systems with air velocities between 300ft/min and 4000ft/
min (1.5m/s to 20.3m/s). Check the HVAC engineering specifications to ensure the air
velocity in the duct falls within these parameters. If necessary, use a velocity meter to check
the air velocity in the duct.
3.2 Determining mounting location
To obtain a representative air sample, avoid stratification and dead air space. These
conditions can be caused by return duct openings, sharp turns, connections, or long,
uninterrupted runs. For this reason, place the duct housing in the range of six to ten times the
width of the duct from any uninterrupted run (see the following figure).
Figure3.1: Typical duct detector placement
1 Bend or other obstruction 2 6 to 10 times the width oft he duct
3 Width of duct 4 Return air inlet
The D340 can be mounted in any direction of 90° increments without regard to the air flow
direction (see the following figure).
8en | Mounting Duct smoke housing, 2-wire
2017.04 | 7.0 | F.01U.071.685 Installation manual Bosch Security Systems, Inc.
Figure3.2: Mounting positions
1 Air flow 2 Acceptable mounting positions
3 Unacceptable mounting positions
3.3 Preparing sample tubes
The sample tubes must extend across the width of the duct. The three sizes of sample tubes
are:
– D344-1.5 (1.5 ft [0.46 m])
– D344-3 (3 ft [0.91 m])
– D344-5 (5 ft [1.52 m])
Sample tubes include an end plug that must be installed in the narrow end of the tube (see
the following figure).
Figure3.3: Sample tube
1 Set screw 2 End plug
When using the D344‑1.5 in installations where the duct width is between 12in. (31cm) and
18in. (46cm), cover some of the sample holes. The D344‑1.5 has 19 sample holes, but only
12 are required for normal installations. Depending on the length, you might have to cover
some of the holes with duct tape. Use even spacing when covering the sample holes to allow
an even sample across the width of the duct (see the following figure).
Figure3.4: Covering sample tube holes
Duct smoke housing, 2-wire Mounting | en 9
Bosch Security Systems, Inc. Installation manual 2017.04 | 7.0 | F.01U.071.685
1 Place tape over these sample holes
You can combine or cut sample tubes to make different lengths. A sample tube can be a
maximum length of 10ft (3m) or a minimum length of 1ft (0.3m). For example, you can join
a 3ft (1m) and a 5ft (1.5m) to make an 8ft (2.4m) sample tube.
Notice!
Sample tubes must have at least 12 sample holes within the duct. Do not cut a sample tube
to less than 12 sample holes.
Notice!
Sample tubes over 3ft (1m) must be supported at the end opposite the duct detector. The
support hole should be 1in. to 2in. (2.5cm to 5cm) below the entry hole to allow for
possible moisture drainage (see the figure following step 4 of the following procedure).
To combine sample tubes:
1. Remove the roll pin and set screw from one of the sample tubes.
2. Remove the end plug from the other sample tube.
3. Push the flared end over the sample tube you want to lengthen.
4. Align the holes, insert the set screw, and reinstall the end plug. For example, if you want
a 7ft (2m) sample tube, combine a 3ft (1m) sample tube and a 5ft (1.5m) sample
tube. Then cut 1ft (0.3m) from the narrow end to get the necessary length.
Figure3.5: Support hole position
1 1in. to 2in. (2.5cm to 5cm)
5. Seal the gap between duct and sample tube. You can remove up to 6in. (15cm) from the
D344‑1.5 for 1ft (0.3m) duct installations.
3.4 Mounting the detector
1. Locate the D340 mounting template and remove it from its backing. Place the template
over the desired location on the duct (see the following figure).
10 en | Mounting Duct smoke housing, 2-wire
2017.04 | 7.0 | F.01U.071.685 Installation manual Bosch Security Systems, Inc.
Figure3.6: Mounting template placement
1 Duct 2 Mounting template
3 16.70in. (40.8cm) 4 Two 0.375in. (9.5mm) holes for
mounting the housing to the duct
5 Two 1.75in. (45mm) diameter holes
for the sample tubes
6 6.5in. (16.6cm)
2. Drill out the required holes and remove any remaining debris.
3. Remove the template.
4. Place a #10‑24 jack nut (see the following figure) in each of the 3/8in. (9.5mm) holes.
Figure3.7: Jack nuts
5. Insert the #10-24x1in. machine screws into the jack nuts and firmly tighten. This
attaches the jack nuts to the duct. You might have to hold the jack nuts with a installer
wrench or a pair of pliers while tightening the screws to stop the jack nut from spinning
in the hole. Remove the screws for later use.
6. Place the two foam gaskets over the sample and exhaust ports on the back of the housing
(see the following figure).
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