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24 Conventional Products—6424 Projected Beam Type Smoke Detector

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Summary of Contents for 6424

Page 1: ... LIT 408157 Introduction Page 3 General Description 3 Detector Placement 7 Installation Procedures 11 General Information 11 Mounting Brackets 11 Mounting Figures 12 Wiring Installation Guidelines 13 Installation 16 Alignment 19 Sensitivity 23 Testing and Maintenance Procedures 25 Sensitivity Testing 25 Maintenance 26 Limitations 27 6424 Projected Beam Type Smoke Detector ...

Page 2: ...2 Conventional Products 6424 Projected Beam Type Smoke Detector ...

Page 3: ...dards specific to country and locality of installation Failure to follow these directions may result in failure of this device to report an alarm or trouble condition or respond properly to an alarm condition Johnson Controls is not responsible for devices that have been improperly installed tested or maintained by others The 6424 is a long range projected beam smoke detector designed to provide o...

Page 4: ...are four LEDs on both the receiver and the transmitter which are used as a beam alignment aid No additional equipment is needed for alignment of the beam Each detector contains one Form A normally open contact for alarm signals and one Form B normally closed contact for trouble signals Supervision of power is accomplished by installing a power supervisory End of Line EOL relay module model A77 716...

Page 5: ...t 1 Receiver Wiring Cable 1 Transmitter Wiring Cable 1 Wall Mounting Bracket 2 Ceiling Mounting Bracket inside part 2 Ceiling Mounting Bracket outside part 2 Wall Bracket Screw 2 Ceiling Bracket Screw 2 Washers 4 Allen Wrench 1 Instruction Manual 1 Test Filter Part No F37 01 00 1 Cable Exit Plug 1 Hole Plug 1 BMB Kit Model 6424A only 1 ...

Page 6: ... Test Station with Magnet Indicators Alarm Remote Output Local LED red Trouble Remote Output Local LED yellow Normal Operation Local LED flashing green Alignment Aid LED Bar Graph four red LEDs Relays Alarm Trouble Environmental Temperature 30 to 55 C 22 to 131 F Humidity 95 RH Non condensing Mechanical Weight Receiver 1 5 lb 663 g Transmitter 1 3 lb 598 g Mounting Ceiling or Wall Separate Mountin...

Page 7: ...ratification Some typical locations would include large areas with high ceilings such as atriums warehouses and factories Some fire codes specify spacing on a given center to center distance between detectors under ideal conditions These spacing is based on rooms with smooth ceilings and no physical obstructions between the contents being protected and the detectors Moreover they are also based on...

Page 8: ...0 ft M ax TX RX TX RX S 1 2 S Max 1 4 S M ax Figure 2 Spacing for Smooth Ceiling Top View In the case of peaked or sloped ceilings codes may specify spacing of detectors by using horizontal spacing from the peak of the roof or ceiling Figures 3 and 4 show the spacing for both the shed type and peaked type sloped ceilings ceilgph4 S 3 ft M ax S 1 2 S M ax TX RX ...

Page 9: ...al Products 6424 Projected Beam Type Smoke Detector 9 Figure 3 Sloped Ceiling Shed Type S S 3 ft M ax 3 ft M ax 1 2 S M ount Detector Anywhere in This Area ceilgph2 1 2 S TX RX Figure 4 Sloped Ceiling Peaked Type ...

Page 10: ...10 Conventional Products 6424 Projected Beam Type Smoke Detector ...

Page 11: ... be at approximately the same height 2 Assemble each ceiling bracket with the inside part between the ceiling and the outside part as shown Figure 5 3 Mount the brackets so that the slot in the front of each bracket is facing the other bracket 4 Mount the brackets only on solid structures of the building 5 To avoid unwanted alarms due to wall movement do not mount to flexible walls such as sheet m...

Page 12: ...tal Adjustm ent Screw No 10 24 x 1 3 8 in M etal W asher Plastic W asher M ounting Hole M ounting Hub U Bracket Vertical Adjustm ent Screws 2 Cable Egress Hole Plug Used to Plug Unused Hole Alignm ent Adjust Potentiom eter Receiver O nly Status LEDs Receiver O nly Beam Lens Alignm ent LEDs detecwa1 W all M ounting Bracket ...

Page 13: ...Installation wire used for the beam detector shall be no smaller than No 18 AWG 1 0 square mm For best system performance all fire system wiring should be a twisted pair and installed in a grounded conduit separate from other electrical wiring Note Do not mix fire system wiring in the same conduit as any other electrical wiring Shielded cable may be used to provide additional protection against el...

Page 14: ...an be wired before the detector is mounted 1 Remove the precut insulation from the conductor to be connected 2 Use a wire nut to connect the detector wire to the field wire If the insulation has been removed from any unused conductors make sure they are terminated properly to avoid short circuits 3 Wire the transmitter in either of two ways Use a connecting pair of wire to permanently connect the ...

Page 15: ...lack Red W hite Stripe W hite Yellow Stripe W hite W hite Black Stripe EO L Resistor beam1 Note Transm itter EOL Resistor Orange Black Green Red Transmitter R eceiver Orange Green Receiver W hite Black Stripe Brown W hite Violet Stripe Violet Gray Black Red W hite Stripe W hite Yellow Stripe W hite beam 2 C lass A Return Loop Power to Detectors UL Listed Panel Listed Remote Power Source Black Red ...

Page 16: ...llow Orange W hite Brown Stripe 5 3 4 2 1 RTS451 Remote Test Station 6424 Figure 11 Remote Test Station WARNING Shock hazard Disconnect the power from the Initiating Device Circuits IDC before installing the detectors 1 Before operation remove the clear protective film and warning label on the smoked lens of both the receiver and transmitter 2 Do not remove the protective film until all constructi...

Page 17: ...unting the BMB are included in the BMB kit 5 Insert the flange of the detector mounting bracket into the keyed hole of the wall or ceiling mounting bracket 6 Slide the detector forward into position The detector should now hang from the bracket 7 Insert the correct screw and washer combination either wall or ceiling mount through the slot and into the hole of the mounting bracket flange 8 Tighten ...

Page 18: ...r View Receiver Figure 13 Rear View Transmitter Access Door detecw a5 30 55 N A Sensitivity Select Switch Alignment Mode Switch Reset Switch Connector 16 Conductor Cable Access Door detecwa6 A N L S Range Select Switch Alignm ent M ode Switch 6 Conductor Cable SW 1 SW 2 Connector ...

Page 19: ...e condition exists Turns on if an alarm condition is sensed Latches on until reset Not Used deteca4 Figure 14 Front View Transmitter and Receiver Alignment Adjust Potentiometer Receiver Only Beam Lens Alignment LEDs detecwa3 M axim um M inim um Figure 15 Alignment Adjust Pot Receiver Only Note The clear protective film and warning label on the smoked lens of both the receiver and transmitter must ...

Page 20: ...d through the receiver At the Receiver 1 Select the proper sensitivity using the switch in the back of the receiver Selecting the sensitivity depends on the separation of the transmitter and receiver The sensitivities and ranges shown below are in accordance with Underwriters Laboratories UL Standard UL 268 Smoke Detectors For Fire Protective Signaling Systems Table 5 Sensitivity Distance Qualific...

Page 21: ...Align the receiver by slowly moving it trying to get the fourth LED on If the LED comes on slowly turn the alignment adjustment pot clockwise until only three alignment LEDs are on 10 Once the receiver is aligned as well as possible Tighten the horizontal and then the two vertical adjustment screws on the receiver brackets Make sure that all three alignment LEDs stay on 11 For final alignment repe...

Page 22: ...ute before continuing It is important that the beam is not blocked or disturbed during this time because the detector is self calibrating Any interference could cause a trouble signal 18 If there is a trouble signal during this period switch the receiver back to the align mode making sure that three and only three align LEDs are on If so switch back to normal mode and wait again If three alignment...

Page 23: ...nverts total obscuration to percent per foot at both 30 and 55 sensitivity settings Figure 16 1 3 1 2 1 1 1 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 30 Sensitivity Setting 55 Sensitivity Setting sensgrph Figure 16 Sensitivity in Feet vs Distance Assuming Uniform Smoke Distribution Sensit...

Page 24: ...24 Conventional Products 6424 Projected Beam Type Smoke Detector ...

Page 25: ...reen LED at the receiver making sure not to disturb or block the beam If it does not flash and the detector is not in trouble or alarm power has been lost to the detector check the wiring Calibrated Test Filter 1 Test the detector at the receiver 2 Use the proper side of the test filter depending on the sensitivity setting 55 or 30 of the detector 3 Place the NO ALARM portion of the test filter ov...

Page 26: ...er authorities that the smoke detector system is undergoing maintenance and will be temporarily out of service Disable the zone or system undergoing maintenance to prevent unwanted alarms 1 Carefully clean the lenses of both the receiver and the transmitter A damp soft cloth with a mild soap may be used Avoid products with solvents or ammonia 2 After the lenses are clean switch the receiver to the...

Page 27: ...osed doors may not reach the beam smoke detector s line of sight and alarm it A detector may not detect a fire developing on another level of a building For this reason detectors should be located on every level of a building Beam smoke detectors have sensing limitations Detectors cannot be expected to provide warnings for fires resulting from inadequate fire protection practices violent explosion...

Page 28: ... Products 6424 Projected Beam Type Smoke Detector Notes Controls Group FAN 408 507 E Michigan Street Fire Initiating Devices and Notification Appliances Technical Manual P O Box 423 Printed in U S A Milwaukee WI 53201 ...

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