Bosch D296/D297 Specifications

Installation Instructions
D296 and D297
Long Range Beam Smoke Detectors
The D296 and D297 are long range projected beam type smoke
detectors which consist of a separate transmitter and receiver. Internal
pointability provides coverage flexibility without the need for brackets.
Automatic Signal Synchronization and Range Adjustment reduce
installation costs. Selectable sensitivity and alarm response time
provide installation flexibility.
• Listings and
• Operating Voltage: D296: 18.0 to 32.0 VDC
D297: 10.2 to 15.0 VDC
• Standby Current: D296: Receiver - 45 mA @ 24.0 VDC
Transmitter - 20 mA @ 24.0 VDC
D297: Receiver - 50 mA @ 12.0 VDC
Transmitter - 20 mA @ 12.0 VDC
• Receiver Alarm
D296: 60 mA @ 24.0 VDC
D297: 75 mA @ 12.0 VDC
• Range (distance
between transmitter
and receiver):
30 to 350 ft. (9 to 107 m)
• Spacing (distance
between systems): Allow no more than 60 ft. (18 m) between
systems. Sixty foot spacing is confirmed
by Underwriters Laboratories, Inc. testing.
• Pointability:
Internally pointable optics for ±90°
horizontal, and ±10° vertical adjustment.
• Sensitivity:
Field selectable for 20, 30, 40, 50, 60, or
70 percent beam obscuration.
• Alarm Contacts:
Normally Open contacts rated 1 amp,
60 VDC maximum for DC resistive loads.
Do not use with capacitive or inductive
• Trouble Contacts: Normally Closed contacts rated 1 amp,
60 VDC maximum for DC resistive loads.
Do not use with capacitive or inductive
• Aux. Alarm
Form "C" (NO, C, NC) contacts rated
1 amp, 60 VDC maximum for DC resistive
loads. Do not use with capacitive or
inductive loads.
• Tamper:
Access door tamper switch in
series with trouble contacts.
Transmitter: Upon cover’s removal, cover
tamper switch interrupts
• System Signaling: Conventional 4-wire system. Not for use
with systems that incorporate an alarm
verification feature.
• Signal Delay:
Selectable 30 seconds or 5
20 ± 2 seconds.
• Temperature:
The storage and operating temperature
range is -22° to +130°F (-30° to +54°C).
For UL Listed installations, the range is
+32° to +130°F (0° to +54°C).
• Mounting:
The units are designed to be mounted to
4 in. (10 cm) square or octagonal
electrical boxes (not supplied).
• Standard
• Options:
Permit #1943
Acceptance #MEA274-93-E
Job #OX2A9.AY
D306 Remote Test/Indicator Plate and
Test Cable
D307 Remote Indicator Plate, D308
Field Test Kit, D309 Alignment Light, and
D1005 Test Cord.
Principle of Operation
Each D296 or D297 beam smoke detector has a separate transmitter
and receiver. The transmitter transmits an invisible infrared beam of
a specific frequency and intensity. The receiver detects, then measures
the beam’s intensity (see Figure 1).
Figure 1 - Infrared Transmission
As the beam is obscured by smoke, the receiver senses a decrease
in the signal strength and measures that decrease. The receiver
compares the signal level with two preset thresholds: an alarm
threshold which is set using the sensitivity switch and a trouble
threshold which is preset at approximately 10%. If the signal falls
below the alarm threshold for the programmed alarm period, the
receiver signals an alarm (see Figure 2).
Figure 2 - Beam Obscuration
If the signal falls below the trouble threshold for more than 20 seconds,
such as might happen if the beam is blocked by a foreign object, the
receiver signals a trouble condition (see Figure 3).
Figure 3 - Beam Blockage
The receiver automatically compensates for the gradual loss of signal
due to dust/dirt build-up on the cover. After 50 percent of the signal is
lost, the receiver will indicate a trouble. When the dust/dirt build-up is
cleaned or the blockage is removed, the detector automatically goes
back to its normal operation level.
A trouble will be indicated at the receiver if the beam strength is
increased by more than 20% for greater than 20 seconds. Causes
include improper initial alignment or the removal of a partial beam
blockage at the time of alignment. Preform a fine-tune alignment
(see Section 7.3).
4.2 Avoid sources of bright light
Installation Considerations
The proper location and spacing of detectors is critical in a properly
installed and operating fire alarm system. For best results, it is
recommended that the detectors be located and spaced in
accordance with the National Fire Protection Association (NFPA)
Standard 72 "The National Fire Code.” This standard is available at a
nominal cost from The National Fire Protection Association,
Batterymarch Park, Quincy, MA, 02269.
In all installations, good engineering judgement should prevail. The
following are some general considerations:
• Do not use mirrors. The detectors should be installed with a
clear line-of-sight between the transmitter and receiver.
• The beam path should be clear of moving objects.
• Set the sensitivity based on the distance between the transmitter
and receiver. See Section 7.2 Sensitivity Adjustment.
Sunlight and light from extremely bright sources such as the exposed
bulbs of high pressure sodium, mercury vapor, and metal halide
lights can cause stray signals. The receiver should not be pointed
toward any of these sources.
Sunlight: Avoid pointing the receiver directly at the rising or setting
sun. If you are installing the unit where sunlight can’t be avoided,
mount the receiver slightly higher than the transmitter and aimed
down toward the transmitter. This should reduce this problem by
causing the receiver to look below the horizon.
Bright Lights: Don’t mount the receiver where it is looking at exposed
bulbs of high pressure sodium, mercury vapor, and metal halide
lights. The illustration below shows where these exposed lights
should be avoided.
Keep bright lights out of this area
4.5 ft. (1.4 m)
14.5 ft.
(4.4 m)
225 ft. (68.6 m)
• The detectors may be mounted directly to the ceiling or to side
walls. Do not mount the units where the beam path may run
parallel within 4 in. (10.2 cm) of a corner.
• For a sloped or peaked ceiling, the beam path should be located
within 3 ft. (1 m) of the ceiling’s peak.
350 ft. (106.8 m)
Bare fluorescent lights may also pose a problem especially in long
hallways where a series of lights run perpendicular to the beam.
Incandescent lights are not a problem as long as they are not directly
in the beam path.
4.3 Use the correct wire gauge and length
• Stratification of air may hinder smoke from reaching detectors
mounted close to the ceiling. Stratification occurs when smoke,
rising because it is warmer than the surrounding air, reaches a
level where it is the same temperature as the surrounding air
and will not rise to the ceiling. If stratification is considered a
possibility, extra beams should be installed where stratification
is expected.
Beam smoke detectors are often used to protect very large areas.
This means that the wire runs used to power the detectors and signal
alarm conditions can be very long. The voltage available at the end of
very long wire runs may not be sufficient to power the detector,
especially when the system is running on battery backup. It is very
important that the correct wire gauge is used for these installations.
• Avoid areas subject to normal smoke concentrations such as
kitchens and garages.
Use the following chart to determine the proper wire size, wire length
and the number of transmitter and receiver pairs that can be used.
• Do not install units where normal ambient temperatures are
below -22°F (-30°C) or above +130°F (+54°C).
Wir e Siz e
The following are some specific installation considerations:
4.1 Avoid Sources of Heat and Air Movement
Wir e
L en g t h
The detectors should be located where the beam path will not pass
near heating and cooling outlets.
• Don’t mount where hot or cold air can blow directly into the beam
• Heating, ventilating, and air conditioning systems can cause
smoke to be blown away from the beam path.
500 ft. (152 m)
1000 ft. (304 m)
2500 ft. (762 m)
5000 ft. (1524 m)
14 AWG
(1.8 m m )
16 AWG
(1.5 m m )
18 AWG
(1.2 m m )
20 pairs
10 pairs
4 pairs
2 pairs
13 pairs
6 pairs
3 pairs
1 pai r
8 pairs
4 pairs
2 pairs
1 pai r
- Smoke must accumulate in the beam path to be detected.
• Heaters mounted close to the beam path can cause the beam to
become distorted.
You can test for beam distortion by monitoring the signal voltage.
After setup, the signal voltage of the detector should read 4 VDC.
Monitor the voltage and turn on all heating and cooling devices in the
area. The signal voltage should not fluctuate more than 0.20 VDC. If
it does, the detector should be moved to avoid these disturbances.
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4.4 Provide a stable mounting surface
4.6 Consider the expected Fire load
Beam smoke detectors depend on the measurement of the projected
beam to sense smoke. Therefore, shifts in the alignment of the beam
due to movement of the transmitter/receiver can cause trouble or
alarm conditions.
When designing a fire alarm system, consider the expected fire load
within the application.
• Always select a stable mounting surface.
• Never mount the unit to a suspended support such as a pipe or
length of wood supported at only one end.
For instance, fires caused by the ignition of flammable petroleumbased liquids usually result in a rapid buildup of heavy smoke. When
these types of fires are probable, use sensitivity settings 0 or 1 which
provide a response time of 5 seconds.
This type of mounting can create a “pendulum effect” which greatly
multiplies even very small movements at one end of the support. For
example, a 2 in. (5.1 cm) movement translates into a beam
misalignment of over 20 ft. at 350 ft. (6 m at 107 m).
NOTE: This product is not designed for use in outdoor applications.
Mounting surfaces should be supported at opposite corners to reduce
the pendulum effect.
NOTE: If not mounting to an electrical box, be sure the surface will
not be subject to movement or vibrations. For example: do
not mount directly to a suspended ceiling without extra
• Always select surfaces not subject to building movement.
The automatic compensation circuits of the D296 and D297 will
eliminate most problems created by normal building expansions
and contractions. In some unusual circumstances, the walls and
support structure may be subject to more significant movement due
to the operation of heavy equipment, such as cranes, anchored to the
top of the walls.
When in doubt about mounting surface stability, measure the signal
voltage of the detector. This voltage should be 4.0 VDC. Misalignment
of the beam can cause this voltage to increase or decrease. The
detector will indicate a trouble condition when the voltage increases
to more than 4.8 VDC, or when it decreases to less than 2.0 VDC over
a long period of time or to 0.4 VDC greater than 20 seconds. For more
information on reading this voltage, see Section 8.3.
If movement of the mounting surface is suspected, relocate the
detector to a surface that does not move or add supports to the
mounting surface to prohibit movement.
Install a 4 in. (10 cm) square or octagonal electrical box (not supplied)
to a rigid surface that will not be subject to movement or vibrations.
• Remove the receiver's access door (1 screw), then remove the
cover (4 screws). See Figure 4.
Figure 4 - Access Door and Cover
• Remove the receiver’s backplate by removing the single
mounting screw from the top of the circuit board carrier plate then
separating the two plates (see Figure 5).
• DO NOT overtighten the mounting screws.
When the detector is mounted to an electrical mounting box
[4 in. (10 cm) square or octagonal], the mounting plate may bow as a
result of the mounting box screw tabs being below flush with the top
edges of the mounting box. Overtightening the mounting screws bows
the mounting plate inward at the bottom, causing the optics to aim
Irregularities in the flatness of the mounting box edge surfaces or
screw tabs will worsen this condition. Using only mounting boxes
with flat, regular surfaces and properly formed screw tabs, and
tightening the mounting screws to secure the mounting plate to
2 in/lb torque will minimize any misalignment caused by bowing of
the mounting plate.
Figure 5 - Removing the Backplate
• Bring wiring from the electrical box through the wire entrance.
4.5 Consider the effects of stratification in cold environments
NOTE: All wiring should be unpowered.
In very cold environments such as unheated warehouses, smoke
may cool very quickly and is less likely to rise to the ceiling. Consider
additional units at lower mounting heights to help compensate for
this situation.
• Securely mount the backplate to the electrical box.
• Return the circuit carrier plate to the backplate. Secure it in place
with the single mounting screw.
• Repeat this mounting procedure for the transmitter.
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Only apply power after all connections have been made
and inspected.
NOTE: The D307 remote indicator should be located no further than
100 ft. (30.5 m) from the receiver and wired with 18 AWG
(1.2 mm) or larger wire. The D306 may be wired up to 500 ft.
(152 m) from the receiver.
• Slide the Remote Indicator Connector over the pins just to the
right of the receiver’s terminal strip.
• Wire the transmitter and receiver terminals as follows (see
Figure 6).
NOTE: Do not install on verified fire circuits.
D296/D297 Receiver
Alarm Loop
Fire Alarm
Control Panel
End of Line
Fire Trouble 10 to 32
Alarm Alarm VDC
4 5 6 7 8 9
Power Loop –
Power Loop +
Remote Indicator
Plate Connector
Fire Alarm
Control Panel
Alarm Loop
Power Loop –
Power Loop +
Figure 6 - Wiring a Single Unit
NOTE: Do not coil excess wiring inside the units.
• Transmitter Terminals 1 & 2:
Input power terminals. See section 2.0 for the operating voltages
of the D296 and D297.
• Receiver Terminals 8 & 9:
Input power terminals. See section 2.0 for the operating voltages
of the D296 and D297.
NOTE: Resetting from a fire alarm requires power to the receiver to
be interrupted for at least one second. If not provided by the
fire panel, it can be accomplished by installing a switch in
series with Terminal 9.
Remote Indicator Plate
The D306 Remote Indicator Plate is shipped with the D296 as a
standard accessory. Although the Remote Indicator Plate is not
required, the manufacturer recommends its installation to provide a
means of checking the condition of the detector from ground level.
Yellow LED
Green LED
Figure 7 - Connecting the D306 Remote Indicator Plate
NOTE: If connecting a D307 Remote Test/Indicator Plate,
consult the D307 Installation Guide (P/N: 32071).
• Receiver Terminals 6 & 7:
Normally Closed Trouble contacts will open for trouble alarm.
Ground (–)
• Receiver Terminals 1, 2 & 3:
Form "C" Auxiliary relay contacts. Terminals 1 & 2 will open on fire
alarm; Terminals 2 & 3 will close (short) on fire alarm.
• Receiver Terminals 4 & 5:
Normally Open Fire alarm contacts will close (short) on fire
Voltage Monitor
Before starting this section, confirm that all connections have been
made and are secure, then apply power to both units.
• Press the Aim Mode button (directly above the green LED) on the
transmitter (see Figure 8). This allows the transmitter to power
up while its cover is off.
- Check the transmitter’s green LED. It should be flashing on
and off.
- If the LED is off, check for the presence of power and proper
polarity on Terminals 1 (–) & 2 (+).
- A steady green LED indicates a faulty transmitter, and the unit
should be returned to the factory.
If a D306 or D307 Remote Indicator Plate will be used, install the
Remote Indicator Connector to the receiver now (see Figure 7).
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• Rotate the transmitter's optical module left or right until the
image of the aiming light (or receiver image, if aiming light is not
used) can be seen in the mirror.
- If initially aimed too high or low, adjust the Vertical Fine Tuning
adjustment allen screw (with supplied allen wrench) slightly
up or down until the image is found.
• Use the Vertical Fine Tuning adjustment screw and the
Horizontal Fine Tuning adjustment screw to fine tune the image
to the center of the mirror (in-line with the front and rear bore
Figure 8 - Cutout View of Transmitter Circuit Board Showing
Aim Mode Button Location
• Replace and secure the transmitter's cover when this alignment
procedure is complete.
• Check the transmitter's green LED. It should be flashing.
• Check the three receiver LEDs (see Figure 9).
• Replace and secure the transmitter's access door.
Figure 9 - Receiver's LEDs
• Check the receiver's green LED. It should be flashing. This
indicates that the preliminary alignment is complete.
- It is normal for all of them to be on at this time, with the green
indicator either flashing or constantly on.
- If all are off, check for the presence of power and proper
polarity on Terminals 8 (–) & 9 (+).
• Mount a D309 Strobe Aiming Light or equivalent (e.g. Faraday
5508) as close to the receiver as possible (preferably on top of
the receiver).
- Point it at the transmitter as your guide for aiming (an aiming
light may not be necessary for short distance separations).
7.1 Preliminary Alignment
Each optical module is equipped with two alignment mirrors (one on
each side) for initial alignment (see Figure 10).
Figure 10 - The Optical Module
7.2 Sensitivity Adjustment
Use the chart below (Figure 12) to aid in the sensitivity adjustment.
R ec o m m en d ed S et t i n g s
Sw i t c h
S et t i n g
S en s i t i v i t y
A l ar m
R es p o n s e
B eam L en g t h
5 se c.
30-100 ft. (9 -31 m)
5 se c.
100-350 ft. (31 -107 m)
3 0 se c.
30-50 ft. (9 -15 m)
3 0 se c.
45-75 ft. (14-23 m)
3 0 se c.
70-100 ft. (21 -31 m)
3 0 se c.
90-140 ft. (27-43 m)
3 0 se c.
120-180 ft. (37-55 m)
3 0 se c.
160-350 ft. (49-107 m)
Figure 12 - Recommended Settings Chart
To initially align an optical module, look into either mirror from a side
angle at least 2 ft. (61 cm) from the module. The optical module is
pointed at objects seen in the mirror when the orange colored front
bore sight is in the center of the rear bore sights (see Figure 11).
Front Bore Sight
Rear Bore Sights
with Bore Sights Aligned Properly.
NOTE: Positions 8 and 9 are not valid positions. They are not to be
• Select the appropriate sensitivity setting from the above chart
based on the distance between the transmitter and receiver.
• Set the receiver’s Sensitivity switch at this setting.
Figure 11 - View of the Alignment Mirror
- If the receiver’s green LED is not flashing, repeat the preliminary alignment procedure for the receiver.
• Align the receiver to the image of the transmitter using the above
preliminary alignment procedure.
• The Sensitivity switch is located just to the right of the optical
module on the receiver. The indicator or pointer marking runs
along the side of the switches' shaft (see Figure 13).
Use alignment sights like aiming a gun.
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• After completing the fine tune alignment, remove the test cable,
then replace and secure the receiver's cover.
• Check the status of the receiver’s green LED. It should still be
Figure 13 - Sensitivity Switch
• The recommended settings chart lists distances with some
settings that overlap. For more sensitive detection, select the
lower number setting. For better immunity to false alarms, select
the higher number setting.
7.3 Fine Tune Alignment
• Connect the supplied D1005 Test Cable to Pins 1, 2 and 3 of P6,
the group of pins located just to the right of the receiver’s
terminal strip (see Figure 14).
• With the meter still connected to the test cable, re-install the test
cable to P6 through the opening in the cover (red lead towards
center of unit).
• An alarm test may be performed here if desired by connecting
the white and black wires of the D1005. To reset the unit,
temporarily remove power.
• Press the receiver’s Set-up button located just below the P6/test
cable connection (see Figure 15). Press only if the covers are
on both transmitter and receiver.
- This starts a one to two minute automatic internal setup
process that results in a reference voltage for measuring
beam blockages.
Figure 14 - D1005 Connection
- Temporarily disconnect the Remote Indicator Plate connector, if
• Connect a 20,000 Ohm/volt (or greater) DC VOM to the black
(–) and red (+) leads of the D1005.
- Set meter scale so that readings of 0.0 to 5.0 VDC can be
• Check the three LEDs on the receiver.
- If the beam is being received by the receiver, the green LED
should be flashing, and the red and yellow LEDs should be on
- If the green LED is on steady, the beam is not reaching the
receiver. If this is the case, the preliminary alignment procedure should be attempted again.
• Observe the meter readings and adjust the receiver’s optical
module using the Horizontal and Vertical Fine Tuning adjustment
screws for a maximum reading on the meter. This is the most
critical process of alignment. For the most effective operation
of this system, the peak voltage during fine tune alignment
must be obtained.
NOTE: When performing fine tune alignment, keep arms and hands
away from the front of the receiver and out of the beam path.
• The maximum voltage peaked reading will vary depending on the
distance between the transmitter and receiver. The acceptable
peaked voltage range is 0.50 to 5.00 V. The voltage at the
receiver is greater at shorter distances. It is very important to
peak the voltage to insure a stable trouble free detector.
Make a note of the alignment voltage. It may be helpful if
future troubleshooting is necessary.
Figure 15 - The Receiver's Set-up Button
- The red and yellow LEDs should turn off, and the green LED
will turn on steady. After some voltage fluctuations, the meter
should settle at 5.0 VDC.
NOTE: Be careful not to block the beam or move the units during
this time.
- At the end of the setup period, the receiver’s green LED will
flash, and the voltage will drop to between 3.8 and 4.2 VDC.
This is a reference voltage that later readings can be compared to when determining the need for cleaning.
• If the voltage is not between 3.8 and 4.2 VDC, push the Set-up
button again.
• After set-up is complete, remove the test cable (and reconnect
the Remote Indicator Plate connector if used).
• Replace and secure the access door.
Other Information
8.1 Fire Alarm Reset
To reset the receiver after a fire alarm has occurred, remove power
from the receiver for at least one second, then re-apply (see also,
Power Outage, section 8.4).
8.2 Cleaning
At least once a year, the outside of the covers should be cleaned with
a common window cleaner and a soft, clean cloth. Under normal
conditions, this should not result in a trouble alarm as long as the
beam is not continuously blocked for more than 18 seconds. After
cleaning, recheck the reference voltage. If the voltage is less than 3.8
VDC, or greater than 4.2 VDC, calibrate the units (see section 8.3.)
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8.3 Reference Voltage Calibration
The reference voltage of the detectors should be checked at least
once a year (or more often if required by local regulations or authorities
having jurisdiction). Clean covers are necessary for proper
reference voltage readings.
As shown in Figure 17, if the expected smoke density is 0.5 percent
per ft. (per 30 cm), the obscuration at 50 ft. (15 m) is 20 percent and at
250 ft. (95 m) it is 73 percent.
To check the reference voltage, remove the receiver's access door
and measure the reference voltage, using the supplied test cable, or
measure the voltage at the D307 Remote Indicator Plate (if used). If
the voltage is less than 3.8 VDC, remove the cover and perform a fine
tune alignment including use of the Set-up switch. If above 4.2 VDC,
press the Set-up button. Calibration is not necessary if the voltage is
between 3.8 and 4.2 VDC.
8.4 Power Outage
UL Minimum Sensitivity
When power is removed, then reapplied to the receiver (such as in a
power outage or alarm reset), the original reference voltage
information is lost.
If the cover is on at the time of power-up, the receiver will automatically
restart the internal set-up process (to get a new reference voltage)
when power is applied. If the cover is off, the Set-up button will have to
be pressed after the cover is reattached.
30% 40%
UL Maximum Sensitivity
30 (9m)
80 (24m)
130 (40m)
180 (56m)
230 (70m)
280 (85m)
330 (100m)
Distance Between Transmitter and Receiver
Figure 17 - Smoke Density/Obscuration Chart
The next chart (Figure 18) shows the Sensitivity Pot Setting (total
obscuration) that is needed for alarm.
8.5 Remote Indicator Plate Connector
Momentarily connecting the orange and black leads of the connector
(see Figure 16) will produce a test alarm. For a remote test, install a
momentary switch between the orange and black wires.
ORANGE - Remote Alarm Test
BLUE - Analog ref. voltage out
BLACK - Common (-)
RED - Red LED indicator
YELLOW - Yellow LED indicator
GREEN - Green LED indicator
Figure 16 - Remote Indicator Plate Connector
The black and blue wires may be connected to an analog meter for
reference voltage measurements. The red, yellow, and green wires
may be connected to remote LEDs.
S en s i t i v i t y
Po t
S et t i n g
To t al
Ob s c u r at io n
at A l ar m
0 or 3
1 or 6
Figure 18 - Sensitivity Pot/Obscuration Chart
8.7 Field Sensitivity Measurements
Each wire is current limited to a maximum of 10.0 mA DC.
8.6 Smoke Density/Obscuration Information
The total obscuration of the infrared beam is dependent upon the
density and width of the smoke cloud along the beam path. As the
width of the smoke cloud increases along the beam path, less dense
smoke will be needed for an equal obscuration of the beam path. In
practice, the smoke cloud is assumed to be the entire distance of the
beam path; therefore, the total obscuration required for alarm should
be selected by setting the Sensitivity Pot as recommended in
section 7.2.
Since the total obscuration of the beam by smoke increases with
distance between the units (because more smoke will be within the
beam path), the detector can be made less sensitive as the distance
increases. Additionally, the sensitivity of the detector should be made
less at greater distances because obscuration by other contaminants
such as dust increases. The sensitivity should be set to respond to
the proper smoke obscuration and also to reduce the chance of a
false activation.
The detectors automatically compensate for the effects of dust or dirt
accumulation on the covers and for component aging. The NFPA
requires that the detector's sensitivity be measured in the field, and
requires that these measurements be made within one year after
initial installation and every alternate year thereafter (reference NFPA
72). A D308 Test Kit should be ordered to test the unit’s sensitivity in
the field. The chart (Figure 19) below represents alarm information
for the filters in the D308 as well as the Sensitivity Test Kit provided
with the units.
S en s i t i v i t y
S et t i n g
Mu s t NOT
A l ar m
A l ar m
0 or 3
1 or 6
0% (no filter)
0% (no filter)
20% filter
20% filter
40% filter
40% filter
40% filter
60% filter
60% filter
80% filter
80% filter
80% filter
Figure 19 - Sensitivity/Response Chart
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The Sensitivity Test Kit (supplied) may be used to check the sensitivity
of the detectors during installation only. For field testing, the D308
must be used. Each filter decreases the detector’s signal by a defined
amount. When each filter is placed in front of the receiver’s optical
module for at least 30 seconds (5 seconds for position 0 or 1), the
approximate sensitivity setting of the installed detector can be
determined by the detector's response as shown in Figure 19.
NOTE: Testing these detectors will activate a fire alarm. Be sure to
inform all concerned personnel before performing and testing.
8.8 FCC Compliance Notice
This equipment has been tested and found to comply with the limits
for a class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if not
installed and used in strict accordance with the manufacturer's
instructions and recommendations, may cause harmful interference
to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which
can be determined by turning the equipment on and off, the user is
encouraged to try to correct the interference by one or more of the
following measures:
• Re-orient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from
the receiver.
• Consult the installing company or an experienced radio/TV
technician for help.
The booklet, "How to Identify and Resolve Radio-TV Interference
Problems,” prepared by the Federal Communications Commission
(FCC) may prove helpful. This booklet is available from the U. S.
Government Printing Office, Washington, DC 20402. Please specify
Stock No.004-000-00345-4.
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10.0 Installing Multiple Units
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11.0 Quick Start Installation Flow Chart
TX = Transmitter
RX = Receiver
At TX unit
Press the aim
mode button
Mount TX and RX
according to the
Installation Guide and
applicable fire codes.
• Apply power to both
• Go to TX
• No LED = No power
• Steady LED = Not
seeing TX
• Flashing Yellow =
Invalid sensitivity
setting (see Figure M)
Recheck RX alignment
and clear beam path
At RX unit
set sensitivity per
figure M.
Point the RX at the
TX using its
alignment sight for
initial adjustment.
• LED steady.
TX fault.
Call DS
Point the TX at the RX
using its alignment
Fine tune using
enclosed allen wrench.
TX alignment is
complete. Replace the
housing and access
cover. Go to RX unit.
Is RX green LED
Red and yellow
Remove the test cable and
replace the outer cover.
Leave the access door off.
Is the green
• Attach the test cord
through the access
• Press the setup
button to start the two
minute learn mode.
• Do not block either
unit during this mode.
Is the green LED
Is the meter
voltage between
3.8 and 4.2 VDC?
• LED off
Push the set-up button
again. If still
unsucessful recheck
RX alignment
Alignment is complete.
Remove test cable.
Connect D307 remote plate
if used, to P6.
Replace access hatch door.
• Attach the supplied test cord
to Terminals 2 and 3 of
connector P6 (see Figure O)
• Check voltage using 20,000
Ohm/volt DC VOM
• Optimize the voltage
reading per Figure P using
the allen wrench to fine
Verify operation using
enclosed test filters.
D296/D297 Installation Instructions
Copyright © 2002 Radionics
31344D Page 11
© 2002 Radionics, a division of Detection Systems, Inc.
PO Box 80012, Salinas, CA 93912-0012 USA
Customer Service: (800) 538-5807
Installation Instructions
Page 12 of 12