Bosch Power Tools Speaker System DS240 User Manual

Installation Instructions  
DS240 and DS241  
Listings and  
Approvals:  
UL  
ULC  
MSFM  
S3019  
CS692  
Permit #1943  
Long Range Beam Smoke Detectors  
1.0 Description  
NY City MEA Acceptance #MEA274-93-E  
CSFM  
FM  
The DS240 and DS241 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.  
#7260-1062:106  
Job #OX2A9.AY  
Standard  
Accessories:  
DIS2000 Remote Test/Indicator Plate and  
Test Cable  
Options:  
DIS240 Remote Indicator Plate, TK240  
Field Test Kit, AL240 Alignment Light, and  
TC2000 Test Cord.  
2.0 Specifications  
Operating Voltage: DS240: 18.0 VDC to 32.0 VDC  
DS241: 10.2 VDC to 15.0 VDC  
• Standby Current: DS240: Receiver: 45 mA @ 24.0 VDC  
Transmitter: 20 mA @ 24.0 VDC  
3.0 Principle of Operation  
Each DS240 or DS241 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).  
DS241: Receiver: 50 mA @ 12.0 VDC  
Transmitter: 20 mA @ 12.0 VDC  
Receiver Alarm  
Current:  
DS240: 60 mA @ 24.0 VDC  
DS241: 75 mA @ 12.0 VDC  
Range (distance  
between transmitter  
and receiver):  
30 ft to 350 ft (9 m to 107 m)  
Figure 1 - Infrared Transmission  
Spacing (distance  
between systems): Allow no more than 60 ft (18 m) between  
systems. Sixty foot spacing is confirmed  
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).  
by Underwriters Laboratories, Inc. testing.  
Pointability:  
• Sensitivity:  
Internally pointable optics for ±90°  
horizontal, and ±10° vertical adjustment.  
Field selectable for 20, 30, 40, 50, 60, or  
70 percent beam obscuration.  
Normally Open contacts rated 1 A,  
60 VDC maximum for DC resistive loads.  
Do not use with capacitive or inductive  
loads.  
• Alarm Contacts:  
• Trouble Contacts: Normally Closed contacts rated 1 A, 60 VDC  
maximum for DC resistive loads. Do not  
use with capacitive or inductive loads.  
Aux. Alarm  
Contacts:  
Form "C" (NO, C, NC) contacts rated 1 A,  
60 VDC maximum for DC resistive loads.  
Do not use with capacitive or inductive  
loads.  
Figure 2 - Beam Obscuration  
If the signal falls below the trouble threshold for more than 20 sec,  
such as might happen if the beam is blocked by a foreign object, the  
receiver signals a trouble condition (see Figure 3).  
• Tamper:  
Receiver:  
Access door tamper switch in  
series with trouble contacts.  
Transmitter: Upon cover’s removal, cover  
tamper switch interrupts  
transmission.  
• System Signaling: Conventional 4-wire system. Not for use  
with systems that incorporate an alarm  
verification feature.  
Figure 3 - Beam Blockage  
• Signal Delay:  
Fire:  
Trouble:  
Selectable 30 sec or 5 sec  
20 ± 2 sec  
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.  
Temperature:  
The storage and operating temperature  
range is -22°F to +130°F (-30°C to +54°C).  
For UL Listed installations, the range is  
+32°F to +130°F (0°C to +54°C).  
Mounting:  
The units are designed to be mounted to  
4 in. (10 cm) square or octagonal  
electrical boxes (not supplied).  
A trouble will be indicated at the receiver if the beam strength is  
increased by more than 20% for greater than 20 sec. 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 Fine Tune Alignment on page 6).  
Downloaded from: http://www.guardianalarms.net  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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.  
For instance, fires caused by the ignition of flammable petroleum-  
based 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 sec.  
• 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.  
5.0 Mounting  
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.  
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.  
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  
support.  
• Always select surfaces not subject to building movement.  
The automatic compensation circuits of the DS240 and DS241 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.  
• Remove the receiver's access door (1 screw), then remove the  
cover (4 screws). See Figure 4.  
COVER MOUNTING  
SCREWS (4)  
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 sec. For more  
information on reading this voltage, see Section 8.3 Reference  
Voltage Calibration on page 6).  
ACCESS DOOR  
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).  
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.  
REMOVE TO  
EXPOSE BACKPLATE  
DO NOT over-tighten 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. Over-tightening the mounting screws  
bows the mounting plate inward at the bottom, causing the optics to  
aim low.  
MOUNTING  
SLOTS (4)  
DO NOT  
REMOVE  
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.  
WIRING  
ENTRANCE  
Figure 5 - Removing the Backplate  
• Bring wiring from the electrical box through the wire entrance.  
NOTE: All wiring should be unpowered.  
4.5 Consider the effects of stratification in cold environments  
• 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.  
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.  
• Repeat this mounting procedure for the transmitter.  
DS240/DS241 Installation Instructions  
© 2004 Bosch  
P/N: 22066P  
Page 3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
• Slide the Remote Indicator Connector over the pins just to the  
right of the receiver’s terminal strip.  
6.0  
WIRING  
Only apply power after all connections have been made  
and inspected.  
CAUTION  
• Wire the transmitter and receiver terminals as follows (see  
Figure 6).  
NOTE: Do not install on verified fire circuits.  
Receiver  
AUX.  
FIRE  
TRBL  
RELAY  
ALARM  
ALARM ALARM  
VDC  
DS240/DS241 Receiver  
8
+
Fire Trouble 10 to 32  
Alarm Alarm VDC  
1
2
3
4
5
6
7
9
8
+
9
Remote Indicator  
Plate Connector  
4
5
6
7
Alarm Loop  
End of Line  
resistor  
Fire Alarm  
Control Panel  
Fire Alarm  
Control Panel  
Alarm Loop  
Power Loop –  
Power Loop +  
EOL  
1
2
Power Loop –  
Power Loop +  
+
Transmitter  
Figure 6 - Wiring a Single Unit  
DIS2000  
Violet  
Black  
Red  
Voltage Monitor  
NOTE: Do not coil excess wiring inside the units.  
Transmitter Terminals 1 & 2:  
Input power terminals. See Section 2.0 Specifications on page 1  
for the operating voltages of the DS240 and DS241.  
Ground (–)  
Red LED  
Yellow  
Green  
Yellow LED  
Green LED  
Figure 7 - Connecting the DIS2000 Remote Indicator Plate  
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.  
NOTE: If connecting a DIS240 Remote Test/Indicator Plate,  
consult the DIS240 Installation Instructions (P/N: 24171).  
Receiver Terminals 4 & 5:  
7.0 SET-UP  
Normally Open Fire alarm contacts will close (short) on fire  
alarm.  
Before starting this section, confirm that all connections have been  
made and are secure, then apply power to both units.  
Receiver Terminals 6 & 7:  
Normally Closed Trouble contacts will open for trouble alarm.  
• 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.  
Receiver Terminals 8 & 9:  
Input power terminals. See Section 2.0 Specifications on page 1  
for the operating voltages of the DS240 and DS241.  
AIM MODE  
BUTTON  
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 DIS2000 Remote Indicator Plate is shipped with the DS240/  
DS241 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.  
GREEN  
LED  
Figure 8 - Cutout View of Transmitter Circuit Board Showing  
If a DIS2000 or DIS240 Remote Indicator Plate will be used, install  
the Remote Indicator Connector to the receiver now (see Figure 7).  
Aim Mode Button Location  
- Check the transmitter’s green LED. It should be flashing on  
and off.  
NOTE: The DIS240 remote indicator should be located no further  
than 100 ft (31 m) from the receiver and wired with 18 AWG  
(1.2 mm) or larger wire. The DIS2000 may be wired up to  
500 ft (152 m) from the receiver.  
Page 4  
P/N: 22066P  
© 2004 Bosch  
DS240/DS241 Installation Instructions  
Download from Www.Somanuals.com. All Manuals Search And Download.  
- If the LED is off, check for the presence of power and proper  
polarity on Terminals 1 (–) & 2 (+).  
• Replace and secure the transmitter's cover when this alignment  
procedure is complete.  
- A steady green LED indicates a faulty transmitter, and the unit  
should be returned to the factory.  
• Check the three receiver LEDs (see Figure 9).  
• Check the transmitter's green LED. It should be flashing.  
• Replace and secure the transmitter's access door.  
Trouble/Yellow  
• Align the receiver to the image of the transmitter using the above  
preliminary alignment procedure.  
Red/Alarm  
Green/Normal  
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 the receiver’s green LED is not flashing, repeat the prelimi-  
nary alignment procedure for the receiver.  
- If all are off, check for the presence of power and proper  
polarity on Terminals 8 (–) & 9 (+).  
7.2 Sensitivity Adjustment  
• Mount an AL240 strobe aiming light or equivalent (such as a  
Faraday 5508) as close to the receiver as possible (preferably on  
top of the receiver).  
Use the chart below (Figure 12) to aid in the sensitivity adjustment.  
Recommended Settings  
- Point it at the transmitter as your guide for aiming (an aiming  
light may not be necessary for short distance separations).  
Switch  
Setting  
Alarm  
Response  
Sensitivity  
Beam Length  
7.1 Preliminary Alignment  
0
1
2
3
4
5
6
7
30%  
60%  
20%  
30%  
40%  
50%  
60%  
70%  
5 sec  
5 sec  
30-100 ft (9-31 m)  
100-350 ft. 31-107 m)  
30-50 ft (9 -15 m)  
Each optical module is equipped with two alignment mirrors (one on  
each side) for initial alignment (see Figure 10).  
30 sec  
30 sec  
30 sec  
30 sec  
30 sec  
30 sec  
FRONT VIEW  
SIDE VIEW  
HORIZONTAL  
FINE TUNE  
45-75 ft. 14-23 m)  
VERTICAL  
FINE TUNE  
70-100 ft (21-31 m)  
90-140 ft. 27-43 m)  
120-180 ft (37-55 m)  
160-350 ft (49-107 m)  
FRONT BORE SIGHT  
ALIGNMENT  
MIRROR  
ALIGNMENT  
MIRRORS  
REAR BORE SIGHTS  
Figure 10 - The Optical Module  
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).  
Figure 12 - Recommended Settings Chart  
NOTE: Positions 8 and 9 are not valid positions. They are not to be  
used.  
• Select the appropriate sensitivity setting from the above chart  
based on the distance between the transmitter and receiver.  
Front Bore Sight  
Rear Bore Sights  
• Set the receiver’s Sensitivity switch at this setting.  
Figure 11 - View of the Alignment Mirror  
• 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).  
with Bore Sights Aligned Properly.  
HINT: Use alignment sights like aiming a gun.  
• 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.  
0
Figure 13 - Sensitivity Switch  
- 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.  
• 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.  
• 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  
sights).  
DS240/DS241 Installation Instructions  
© 2004 Bosch  
P/N: 22066P  
Page 5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
7.3 Fine Tune Alignment  
• An alarm test may be performed here if desired by connecting  
the white and black wires of the TC2000. To reset the unit,  
temporarily remove power.  
• Connect the supplied TC2000 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).  
• 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.  
LEDs  
Setup  
Button  
Figure 14 - TC2000 Connection  
- Temporarily disconnect the Remote Indicator Plate connector, if  
installed.  
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.  
• Connect a 20,000 Ohm/volt (or greater) DC VOM to the black  
(–) and red (+) leads of the TC2000.  
- Set meter scale so that readings of 0.0 to 5.0 VDC can be  
read.  
NOTE: Be careful not to block the beam or move the units during  
this time.  
• Check the three LEDs on the receiver.  
- 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 com-  
pared to when determining the need for cleaning.  
- If the beam is being received by the receiver, the green LED  
should be flashing, and the red and yellow LEDs should be on  
steady.  
• If the voltage is not between 3.8 VDC and 4.2 VDC, push the Set-  
up button again.  
- If the green LED is on steady, the beam is not reaching the  
receiver. If this is the case, the preliminary alignment proce-  
dure should be attempted again.  
• After set-up is complete, remove the test cable (and reconnect  
the Remote Indicator Plate connector if used).  
• 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.  
• Replace and secure the access door.  
8.0 Other Information  
8.1 Fire Alarm Reset  
NOTE: When performing fine tune alignment, keep arms and hands  
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,  
Section 8.4 Power Outage on page 7).  
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.  
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 sec. 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 Reference  
Voltage Calibration).  
Hint: Make a note of the alignment voltage. It may be helpful if  
future troubleshooting is necessary.  
• After completing the fine tune alignment, remove the test cable,  
then replace and secure the receiver's cover.  
8.3 Reference Voltage Calibration  
• Check the status of the receiver’s green LED. It should still be  
flashing.  
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.  
• 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).  
Page 6  
P/N: 22066P  
© 2004 Bosch  
DS240/DS241 Installation Instructions  
Download from Www.Somanuals.com. All Manuals Search And Download.  
4.0  
3.5  
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 DIS240 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 VDC and 4.2 VDC.  
3.0  
2.5  
2.0  
1.5  
8.4 Power Outage  
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.  
UL Minimum Sensitivity  
1.0  
0.5  
30% 40% 50%  
20%  
60%  
70%  
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.  
UL Maximum Sensitivity  
0.0  
30 (9m)  
230 (70m)  
280 (85m) 330 (100m)  
180 (56m)  
80 (24m)  
130 (40m)  
Distance Between Transmitter and Receiver  
8.5 Remote Indicator Plate Connector  
Figure 17 - Smoke Density/Obscuration Chart  
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.  
The next chart (Figure 18) shows the Sensitivity Pot Setting (total  
obscuration) that is needed for alarm.  
ORANGE - Remote Alarm Test  
BLUE - Analog ref. voltage out  
BLACK - Common (-)  
Sensitivity  
Pot  
Setting  
Total  
Obscuration  
at Alarm  
RED - Red LED indicator  
YELLOW - Yellow LED indicator  
GREEN - Green LED indicator  
2
20%  
30%  
40%  
50%  
60%  
70%  
0 or 3  
4
5
1 or 6  
7
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.  
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 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 TK240 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 TK240 as well as the Sensitivity Test Kit provided  
with the units.  
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 Setting as recommended in  
Section 7.2 Sensitivity Adjustment on page 5.  
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.  
Sensitivity  
Setting  
Must NOT  
Alarm  
MUST  
Alarm  
2
0% (no filter)  
0% (no filter)  
20% filter  
20% filter  
40% filter  
40% filter  
60% filter  
60% filter  
80% filter  
80% filter  
80% filter  
0 or 3  
4
5
1 or 6  
7
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.  
40% filter  
Figure 19 - Sensitivity/Response Chart  
DS240/DS241 Installation Instructions  
© 2004 Bosch  
P/N: 22066P  
Page 7  
Download from Www.Somanuals.com. All Manuals Search And Download.  
The Sensitivity Test Kit (supplied) may be used to check the sensitivity  
of the detectors during installation only. For field testing, the TK240  
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 sec (5 sec 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 on page 7.  
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.  
Page 8  
P/N: 22066P  
© 2004 Bosch  
DS240/DS241 Installation Instructions  
Download from Www.Somanuals.com. All Manuals Search And Download.  
9.0 Troubleshooting  
DS240/DS241 Installation Instructions  
© 2004 Bosch  
P/N: 22066P  
Page 9  
Download from Www.Somanuals.com. All Manuals Search And Download.  
10.0 Installing Multiple Units  
Page 10  
P/N: 22066P  
© 2004 Bosch  
DS240/DS241 Installation Instructions  
Download from Www.Somanuals.com. All Manuals Search And Download.  
11.0 Quick Start Installation Flow Chart  
DS240/DS241 Installation Instructions  
© 2004 Bosch  
P/N: 22066P  
Page 11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
© 2004 Bosch  
22066P  
Installation Instructions  
7/04  
DS240/DS241 Long Range Beam Smoke Detectors  
Page 12 of 12  
130 Perinton Parkway, Fairport, NY 14450-9199 USA  
Customer Service: (800) 289-0096; Technical Support (888) 886-6189  
Download from Www.Somanuals.com. All Manuals Search And Download.  

BenQ Computer Monitor FP537s User Manual
Beyerdynamic Microphone MTS 67 User Manual
Blomberg Oven KFD 9950 X User Manual
Breville Fryer BDF450XL User Manual
Briggs Stratton Portable Generator 30218 User Manual
Brother Water System MFC J4310DW User Manual
Bushnell Binoculars 06 1729 03 01 User Manual
Cabletron Systems Switch ELS100 24TX User Manual
Cabletron Systems Switch TSX 1620 User Manual
Ciprico Tool Storage 21021625 B User Manual