Bosch Power Tools DS241 Speaker System User Manual
Contents
1. Fire Alarm Control Panel Alarm Loop Orange Blue D Power Loop Power Loop Remote Test See Section 7 5 DIS2000 Voltage Monitor Violet Ground Black Red LED Red Yellow LED Yellow Green LED Green Figure 7 Connecting the DIS2000 Remote Indicator Plate NOTE If connecting a DIS240 Remote Test Indicator Plate consult the DIS240 Installation Instructions P N 24171 7 0 SET UP Before starting this section confirm that all connections have been made and are secure then apply power to both units e 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 Figure 8 Cutout View of Transmitter Circuit Board Showing Aim Mode Button Location Check the transmitter s green LED It should be flashing on and off DS240 DS241 Installation Instructions If the LED is off check for the presence of power and proper polarity on Terminals 1 amp 2 A steady green LED indicates a faulty transmitter and the unit should be returned to the factory e Check the three receiver LEDs see Figure 9 Trouble Yellow a d o Figure 9 Receiver s LEDs 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 presen2. 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 reloc
3. and will not rise to the ceiling If stratification is considered a possibility extra beams should be installed where stratification is expected Avoid areas subject to normal smoke concentrations such as kitchens and garages Do not install units where normal ambient temperatures are below 22 F 30 C or above 130 F 54 C The following are some specific installation considerations 4 1 Avoid Sources of Heat and Air Movement The detectors should be located where the beam path will not pass near heating and cooling outlets e Don t mount where hot or cold air can blow directly into the beam path Heating ventilating and air conditioning systems can cause smoke to be blown away from the beam path 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 Page 2 P N 22066P 2004 Bosch 4 2 Avoid sources of bright light 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 sh
4. e Attach the test cord through the access hatch Press the setup button to start the two minute learn mode e Do not block either unit during this mode Is the green LED blinking Is the meter voltage between 3 8 and 4 2 VDC DS240 DS241 Installation Instructions At TX unit Press the aim mode button At RX unit set sensitivity per Figure 12 page 5 Point the RX at the TX using its alignment sight for initial adjustment Is RX green LED flashing Red and yellow steady Remove the test cable and replace the outer cover Leave the access door off Push the set up button again If still unsucessful recheck RX alignment Alignment is complete Remove test cable Connect DIS 240 remote plate if used to P6 Replace access hatch door 2004 Bosch e LED off Check power Is the green LED on TX blinking LED steady TX fault Call DS Point the TX at the RX using its alignment sight Fine tune using enclosed allen wrench TX alignment is complete Replace the housing and access cover Go to RX unit e Attach the supplied test cord to Terminals 2 and 3 of connector P6 see Figure 14 on page 6 e Check voltage using 20 000 Ohm volt DC VOM e Optimize the voltage reading per Figure P using the allen wrench to fine tune Verify operation using enclosed test filters End P N 22066P Page 11 2004 Bosch 22066P 7 04 130 Perinton Parkway Fairport NY 14450 9199 US
5. 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 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 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 As shown in Figure 17 if the expected smoke density is 0 5 percent per ft per 30 cm the obscuration at 5
6. 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 sights DS240 DS241 Installation Instructions 2004 Bosch Replace and secure the transmitter s cover when this alignment procedure is complete Check the transmitter s green LED It should be flashing Replace and secure the transmitter s access door Align the receiver to the image of the transmitter using the above preliminary alignment procedure Check the receiver s green LED It should be flashing This indicates that the preliminary alignment is complete If the receivers green LED is not flashing repeat the prelimi nary alignment procedure for the receiver 7 2 Sensitivity Adjustment Use the chart below Figure 12 to aid in the sensitivity adjustment Recommended Settings Sa Srey s o o sm moneam o o oe erone Figure 12 Recommended Settings Chart NOTE Positions 8 and 9 are not valid positions They are not to be used e 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 The Sensitivity switch is located just to the right of the optical module on the receiver The indicator or pointer marking runs a
7. 0 ft 15 m is 20 percent and at 250 ft 95 m it is 73 percent DS240 DS241 Installation Instructions 2004 Bosch UL Minimum Sensitivity UL Maximum Sensitivity 80 24m 130 40m 180 56m 230 70m 280 85m 330 100m 30 9m 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 Sensitivity Pot Seiting Total Obscuration at Alarm Figure 18 Sensitivity Pot Obscuration Chart 8 7 Field Sensitivity Measurements 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 ATK240 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 Sensitivity Must NOT MUST Setting Alarm Alarm 2 Oor3 4 5 0 no filter 40 filter 0 no filter 60 filter 20 filter 60 filter 20 filter 80 filter 1or6 40 filter 80 filter 7 40 filter 80 filter Figure 19 Sensitivity Response Chart P N 22066P Page 7 The Sensitivity Test
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9. A Installation Instructions DS240 DS241 Long Range Beam Smoke Detectors Customer Service 800 289 0096 Technical Support 888 886 6189 Page 12 of 12
10. E TO EXPOSE BACKPLATE Y MOUNTING SLOTS 4 Z REMOVE L Y 4 dE bh L WIRING ENTRANCE Figure 5 Removing the Backplate e Bring wiring from the electrical box through the wire entrance NOTE All wiring should be unpowered e Securely mount the backplate to the electrical box e Return the circuit carrier plate to the backplate Secure it in place with the single mounting screw e Repeat this mounting procedure for the transmitter P N 22066P Page 3 6 0 WIRING Only apply power after all connections have been made and inspected CAUTION e Wire the transmitter and receiver terminals as follows see Figure 6 NOTE Do not install on verified fire circuits Receiver AUX x oi ee FIRE TRBL ALARM ALARM ALARM VDC o End of Line resistor Alarm Loop Fire Alarm Control Panel Power Loop Power Loop Transmitter Figure 6 Wiring a Single Unit NOTE Do not coil excess wiring inside the units e Transmitter Terminals 1 amp 2 Input power terminals See Section 2 0 Specifications on page 1 for the operating voltages of the DS240 and DS241 Receiver Terminals 1 2 amp 3 Form C Auxiliary relay contacts Terminals 1 amp 2 will open on fire alarm Terminals 2 amp 3 will close short on fire alarm Receiver Terminals 4 amp 5 Normally Open Fire alarm contacts will close short on fire alarm Receiv
11. Installation Instructions DS240 and DS241 Long Range Beam Smoke Detectors e Listings and Approvals UL ULC MSFM NY City MEA CSFM FM C S3019 CS692 Permit 1943 Acceptance MEA274 93 E 7260 1062 106 Job OX2A9 AY 1 0 Description 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 een e Standard installation costs Selectable sensitivity and alarm response time Accessories DIS2000 Remote Test Indicator Plate and provide installation flexibility 20 Specifications Operating Voltage DS240 18 0 VDC to 32 0 VDC Standby Current Receiver Alarm Current Range distance between transmitter and receiver Spacing distance between systems Pointability Sensitivity Alarm Contacts Trouble Contacts Aux Alarm Contacts Tamper System Signaling Signal Delay Temperature Mounting DS241 DS240 10 2 VDC to 15 0 VDC Receiver 45 mA 24 0 VDC Transmitter 20 mA 24 0 VDC Receiver 50 mA 12 0 VDC Transmitter 20 mA 12 0 VDC DS241 DS240 DS241 60 mA 24 0 VDC 75 mA 12 0 VDC 30 ft to 350 ft 9 m to 107 m Allow no more than 60 ft 18 m between systems Sixty foot spacing is confirmed by Underwriters Laboratories Inc te
12. ate 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 Page 9 yyed uue q y peyooiq sem Jea D 1A198991 1 s 1 UUuEIS JO asneo uluu l q weaq u u pewinoso UUEIV lqnoi pue Wel fee p solO ra NO ra 100p sse00e au Ode 19AI 991 JOSE uup e JO sneo suwaq soo JO Bulssiuu S 100p Sege wey p so O Bulusel3 440 sl P N 22066P Ons JO SUJl ye aBeyoojg jelwed e Jo jeaowa JO zuawu jesi uong dms jo esn Dupnpu weaq jenu o np paseasoul sey ulB5u xs weaq EE E EEN OCA 8 z Uey Ja e0J6 sI Be loA 29U91941 Jl MPI ausel ra yams dn s sseid pue 19A19991 uBi e 1 enee Y p uBi esiuu OA O y 9 unau us op afpuOon 959u8J8J 1 UONHIGIA JO ulBu u s euBis panpa suaj uo 1snp J San I AI9981 pue JemusugI uea oqA Z uey ss s BeljoA 39U3194 1 J qno1l Bulusel3 NO 440 Lee Le O 19AI 581 uBi e 1 Jo yed Weed Ia p uBij situu Jo peyo
13. ce of power and proper polarity on Terminals 8 amp 9 e 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 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 FRONT VIEW SIDE VIEW HORIZONTAL mm THE TUNE Fi je VERTICAL 2 FINE TUNE e ot FRONT BORE SIGHT ALIGNMENT MIRRORS K ALIGNMENT REAR B RE SIGHTS MIRROR 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 __ _ Front Bore Sight Rear Bore Sights Figure 11 View of the Alignment Mirror with Bore Sights Aligned Properly HINT Use alignment sights like aiming a gun e 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
14. d 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 sec For more information on reading this voltage see Section 8 3 Reference Voltage Calibration on page 6 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 e 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 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 4 5 Consider the effects of stratificatio
15. er Terminals 6 amp 7 Normally Closed Trouble contacts will open for trouble alarm Receiver Terminals 8 amp 9 Input power terminals See Section 2 0 Specifications on page 1 for the operating voltages of the DS240 and DS241 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 lf a DIS2000 or DIS240 Remote Indicator Plate will be used install the Remote Indicator Connector to the receiver now see Figure 7 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 e Slide the Remote Indicator Connector over the pins just to the right of the receiver s terminal strip YELLOW lu lt 5 Om Ska UI 2 DS240 DS241 Receiver 2 sae RED Fire Trouble 1 q K 32 Alarm A d A COOC JL C i Remote Indicator r Plate Connector _
16. he proper wire size wire length and the number of transmitter and receiver pairs that can be used 14 AWG 16 AWG 18 AWG 1 8 mm 1 5 mm 1 2 mm 20 pairs 13 pairs 10 pairs 6 pairs 4 pairs 3 pairs 2 pairs 1 pair 500 ft 152 m 1000 ft 304 m 2500 ft 762 m 5000 ft 1524 m DS240 DS241 Installation Instructions 4 4 Provide a stable mounting surface 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 e Always select a stable mounting surface e Never mount the unit to a suspended support such as a pipe or length of wood supported at only one end 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 Mounting surfaces should be supported at opposite corners to reduce the pendulum effect e 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 anchore
17. hould 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 DS240 DS241 Installation Instructions 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 8 4 Power Outage When power is removed then reapplied to the receiver such as ina 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 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
18. long the side of the switches shaft see Figure 13 k 5 S aWVo 40 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 P N 22066P Page 5 7 3 Fine Tune Alignment e 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 Figure 14 TC2000 Connection Temporarily disconnect the Remote Indicator Plate connector if installed e 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 e Check the three LEDs on the receiver lf 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 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 e 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 alignmen
19. n in cold environments 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 DS240 DS241 Installation Instructions 2004 Bosch 4 6 Consider the expected Fire load 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 5 0 Mounting 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 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 e Remove the receiver s access door 1 screw then remove the cover 4 screws See Figure 4 COVER MOUNTING SCREWS 4 i Figure 4 Access Door and Cover e Remove the receivers backplate by removing the single mounting screw from the top of the circuit board carrier plate then separating the two plates see Figure 5 REMOV
20. nment see Section 7 3 Fine Tune Alignment on page 6 4 0 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 e 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 on page 5 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 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
21. ojq si weeg jqno1l udo no do Joop sseo0e vejd y soo JO Bulssiuu ei Joop See o Bui se 4 440 s soo Joop sseo0e ode Jo Bulssiw si Joop ss 855v DuGuEmUL Joao om wm aso an spuo5 s OZL 0 09 u zlllqe s Pinoys Bulzileniui 43413094 p so O u do ddo 3J3J4O 2004 Bosch AGOW SNILV I3dO IVINYON Sweseuue ye amod aog pouo rr anal uedo Ise f ao so so 6um s Jedoid o aS Dune AWAISUSS pienu udo uedo usag Bus NO 19Al 981 UE Jo yed tuue q Jea pouBblesitu 1 AI 991 Jo p yoolq tue g udo ud N N IW 129 EE EEN ER see STVNINYAL STVNIWUaL Manu MOTTSA qas AGOW WIV LYVH DONILOOHSS TNO Ll 3IdAI39381 Cp Jay IWSUeL uoynq Z pue Seuil J l luusueJ passed jou Jenusugn op d u polN uiv SS ld Z d Jamod lo s ilnej uolinq apo uv Z ay je Jamod ON 440 NOILN10 NOILIGNOD KEJ LH ONILOOHSATENOUL YALLINSNVAL Le 9 0 Troubleshooting DS240 DS241 Installation Instructions ju uu Se d 1 A1925 4 JOWIWSUeIL west 1 09 wnuIxey lt gt YALLINSNVYL M3AI39331 1 AI 5 1 BU 0 JO IWSUEI eut C Wo1 9U6 SIp BU UIG eq 1snui Buioeds payewaye jou J peyeuseye aJe SUOHEOOL 19A19991 PUL JO ILUSUEL zey p pu uluuo581 SI ease wes y ul p lle sui ase spun jusoe pe SOW JO OM U UAA ILON uede w 6 4 og sea ye q pinous sin w 16 4 008 S Duer Weed J
22. ould 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 5 4 5 ft 1 4 m R i 14 5 ft gt gt rmbt I A a LLL kM We 225 ft 68 6 m 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 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 Use the following chart to determine t
23. requency and intensity The receiver detects then measures the beam s intensity see Figure 1 F 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 sec such as might happen if the beam is blocked by a foreign object the receiver signals a trouble condition see Figure 3 T Lou 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 sec Causes include improper initial alignment or the removal of a partial beam blockage at the time of alignment Preform a fine tune alig
24. sting 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 Normally Closed contacts rated 1 A 60 VDC maximum for DC resistive loads Do not use with capacitive or inductive loads Form C NO C NC contacts rated 1 A 60 VDC maximum for DC resistive loads Do not use with capacitive or inductive loads Receiver Access door tamper switch in series with trouble contacts Upon cover s removal cover tamper switch interrupts transmission Conventional 4 wire system Not for use with systems that incorporate an alarm verification feature Fire Selectable 30 sec or 5 sec Trouble 20 2 sec 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 130F 0 to 54 C The units are designed to be mounted to 4 in 10 cm square or octagonal electrical boxes not supplied Transmitter Fire Systems Downloaded from http Test Cable DIS240 Remote Indicator Plate TK240 Field Test Kit AL240 Alignment Light and TC2000 Test Cord Options 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 f
25. t 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 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 Check the status of the receiver s green LED It should still be flashing 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 e 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 e 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 Ot LEDs axx Setup H Button Figure 15 The Receiver s Se
26. t 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 com pared to when determining the need for cleaning If the voltage is not between 3 8 VDC 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 e Replace and secure the access door 8 0 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 Section 8 4 Power Outage on page 7 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 8 3 Reference Voltage Calibration The reference voltage of the detectors s
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