Page 1: Table Of Contents
Fire Initiating Devices and Notification Appliances Technical Manual Conventional Products Section Technical Bulletin Issue Date 1095 6424 Projected Beam Type Smoke Detector Introduction Page General Description Detector Placement Installation Procedures General Information Mounting Brackets Mounting Figures Wiring Installation Guidelines Installation...
Page 2 2 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 3: Introduction
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 General provide open area protection. It is to be used with UL Listed, separately Description supplied power (4-wire) control panels only.
Page 4 Initiating Device Circuit (IDC). A loss in power or a trouble condition at the detector causes the respective EOL or trouble relay to open, resulting in a trouble signal at the control panel. 4 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 5 Ceiling Mounting Bracket (inside part) Ceiling Mounting Bracket (outside part) Wall Bracket Screw Ceiling Bracket Screw Washers Allen Wrench Instruction Manual Test Filter (Part No. F37-01-00) Cable Exit Plug Hole Plug BMB Kit (Model 6424A only) Conventional Products—6424 Projected Beam Type Smoke Detector 5...
Page 6 Electrical (Receiver) Voltage 20 to 32 VDC Maximum Ripple Voltage 30% of Nominal (Peak-to-Peak) Current (24 VDC) Standby 10 mA Maximum Alarm 28.4 mA Maximum Continued on next page . . . 6 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 7: Detector Placement
In the case of the ceiling mount, the distance from the end walls should not exceed one-quarter of the selected spacing (7.5 feet maximum if the spacing is 30 feet, Figure 2). Conventional Products—6424 Projected Beam Type Smoke Detector 7...
Page 8 Figures 3 and 4 show the spacing for both the shed type and peaked type sloped ceilings. 3 ft. M a x 1 /2 S M a x ce ilgph4 8 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 9 A n yw h e re in T h is A re a 1 /2 S 1/2 S 3 ft. M a x 3 ft. M a x ce ilgph2 Figure 4: Sloped Ceiling (Peaked Type) Conventional Products—6424 Projected Beam Type Smoke Detector 9...
Page 10 10 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 11: Installation Procedures
Installation Procedures This section contains installation information for the 6424 long distance General projected beam type smoke detectors. Instructions are given for mounting, Information wiring, installing, and aligning the detector, and basic sensitivity information is provided. 1. Install a ceiling or wall bracket for both the receiver and transmitter so...
Page 12: Mounting Figures
P o te n tio m e te r (R e ce ive r O n ly) d e te cw a1 H o le P lu g Figure 6: Wall Mounting 12 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 13: Wiring Installation Guidelines
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 electrical interference. Conventional Products—6424 Projected Beam Type Smoke Detector 13...
Page 14 Use a remote power source to power the transmitter as an alternative wiring configuration. Make sure the remote power source complies with all codes and directives of the authority having jurisdiction (Figure 9). 14 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 15 T ransm itter T ra nsm itter bea m 2 in p u ts to tra n sm itte r a re n o n p o la r. Figure 9: Transmitter Powered Separately Conventional Products—6424 Projected Beam Type Smoke Detector 15...
Page 16: Installation
If construction occurs after the protective film is removed, the smoked lens should be cleaned after construction is completed and the area cleaned. For instructions, read and be familiar with the Maintenance section of this technical bulletin. 16 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 17 Open the sliding access door on the back of the unit. 10. Plug cable connector into the slot in the metal barrier, observing proper orientation (Figures 12 and 13). 11. Repeat for the other unit. Conventional Products—6424 Projected Beam Type Smoke Detector 17...
Page 18 C a b le ..d e tec w a 6 R a n g e S e le ct S w itch S W 2 Figure 13: Rear View Transmitter 18 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 19: Alignment
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 be removed before they can operate. Conventional Products—6424 Projected Beam Type Smoke Detector 19...
Page 20 The alignment adjust pot only changes the gain of the amplifier to compensate for differences in separation between the receiver and the transmitter; it has no effect on the sensitivity of the detector. 3. Turn on power to the system. 20 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 21 Make sure that all three alignment LEDs stay on while tightening these. 13. Slide the alignment switch in the transmitter to the normal mode (N) position. 14. If the transmitter is separately powered, disconnect the temporary wiring. Conventional Products—6424 Projected Beam Type Smoke Detector 21...
Page 22 19. When the detector has completed its self-calibration, the green normal operation LED will flash every two to three seconds. 20. Carefully shut the sliding door. 21. Alignment is now complete. 22 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 23: Sensitivity
30% and 55% sensitivity settings (Figure 16). = 30% Sensitivity Setting = 55% Sensitivity Setting sensgrph Figure 16: Sensitivity in %/Feet vs. Distance Assuming Uniform Smoke Distribution Conventional Products—6424 Projected Beam Type Smoke Detector 23...
Page 24 24 Conventional Products—6424 Projected Beam Type Smoke Detector...
Page 25: Testing And Maintenance Procedures
Detectors that fail to alarm should be returned for repair. Units that alarm during the non-alarm test (Step 3) should be cleaned and tested again before being returned. Follow the maintenance instructions for cleaning. Conventional Products—6424 Projected Beam Type Smoke Detector 25...
Page 26: Maintenance
Remote Test Switch The remote test station, RTS451, can be used with the 6424 beam smoke detector. Follow instructions included with the test station for proper use. For a wiring diagram, see Figure 11: Remote Test Station in this technical bulletin.
Page 27: Limitations
Clean and take care of your beam smoke detectors regularly. Taking care of the fire detection system you have installed will measurably reduce your product liability risks. Conventional Products—6424 Projected Beam Type Smoke Detector 27...
Page 28 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 28 Conventional Products—6424 Projected Beam Type Smoke Detector...

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