6
en | Wiring
High-Voltage Conventional Duct Detector
F.01U.035.635
| 5.0 | 201
1.09 I
nstallation Guid
e B
osch Security Systems, Inc.
3.3
Assembling the Intake Sampling Tubes
The intake sampling tube is a piece of steel piping with a series of holes drilled along its entire
length. Ensure the holes face into the airflow. Exhaust tubes are pieces of steel piping
approximately 7.5 in. (19 cm) long. The sampling tubes come in the standard lengths shown in
the table. You need to cut them to fit in the duct.
Table 3.1
Intake Sampling Tube Standard Lengths
1.
Prepare the intake sampling tubes by cutting them to the desired lengths.
2.
Insert the stopper, included in the Installation Kit, into the end of the intake sampling
tube.
3.4
Mounting the Intake Sampling Tubes
The intake sampling tube connectors are equipped with set screws that allow you to mount
the tubes only in the directions shown in
Figure 3.2
on page 5. Consider the airflow direction
when orienting the intake sampling tubes.
1.
Insert the intake sampling tubes and exhaust tubes into the connectors.
2.
Align the set screws to the set screw holes in the tubes and tighten.
Refer to
Figure 3.1
on page 5 for mounting details.
3.5
Mounting the Detector
1.
Position the detector and intake sampling tube assembly in the desired location.
2.
Using four duct mounting screws (four #12 x ½ in. [1.27 cm] sheet metal screws included
in the installation kit), attach the D300A-HV on the duct.
3.6
Verifying the Air Sampling
Use a Dwyer Model 4000 Differential Pressure Gauge or its equivalent to verify the correct air
sampling. Ensure the pressure differential between the input sampling tube and exhaust tube
is greater than 0.01 in. (0.3 mm) and less than 1.2 in. (3.1 cm) of water.
Refer to
Figure 3.2
on page 5 for the intake sampling tube orientation to air flow direction.
4
Wiring
Wiring must conform to applicable local codes, ordinances, and regulations covering this type
of device. Wire the detectors according to the engineering drawing for that particular job
requirement. For D300A-HV wiring details, refer to Figures 4.1 on page 7. Terminals are
suitable for up to 14 AWG (1.8 mm) wire.
Model Number
Sampling tube length
FAA-325-2.5
2.5 ft (76 cm)
FAA-325-5
5 ft (152.5 cm)
FAA-325-10
10 ft (305 cm)
NOTICE!
Ensure that power is removed from all wiring before routing.
Observe polarity.
CAUTION!
Do not use looped wire under Terminals. Run break wire to provide supervision of
connections.
Summary of Contents for D300A-HV
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