6924 SYSTEMSENSOR | Alldatasheet
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6424 Projected Beam Type
INSTALLATION AND MAINTENANCE INSTRUCTIONS 3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com Specifications General Range: 30 to 330 Feet (9.1 to 100.6 m) Sensitivity: 30% ±5% Total Obscuration, or 55% ±5% Total Obscuration Spacing: 30 to 60 Feet (9.1 to 18.3 m) Response Time: Alarm: 15 Seconds Max. Trouble: 15 Seconds Max. Trouble Condition: 95% or More Obscuration Improper Initial Alignment Self-compensation limit reached (service needed) Test/Reset Features: Obscuration Filters (ALARM/NO ALARM) Local Alarm Reset Switch Remote Test and Reset Switch Capability (compatible with RTS451 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 (4 red LEDs) Relays: Alarm; Trouble Environmental Temperature: –22°F to 131°F (–30°C to 55°C) Humidity: 10% to 93% RH Noncondensing Mechanical Weight: Receiver: 1.5 lbs (680 g) Transmitter: 1.3 lbs (590 g) Mounting: Ceiling or Wall, Separate Mounting Brackets Provided Wiring: Plug with Attached Cable Adjustment Angle: Ceiling: ±30° Horizontal/60° Vertical Wall: ±90° Horizontal/60° Vertical Electrical (Receiver) Voltage: 20 to 32 VDC Maximum Ripple Voltage: 6.0 volts (Peak-to-peak) Current (24 VDC): Avg. Standby: 10mA Max. Avg. Alarm: 28.4mA Max. Avg. Trouble: 27.1mA Max. Start-up Surge: 19mA Max. Relay Contacts: .5A at 30 V AC/DC Reset Time: .6 Seconds Max. Start-up Time (after 5 min. reset): 1 Minute Maximum Power Loss: Retain Memory for 5 Minute Minimum Electrical (Transmitter) Voltage: 18.8 to 32 VDC Maximum Ripple Voltage: 5.6 volts (Peak-to-Peak) Avg. Current (24 VDC): 10mA Max.
Please thoroughly read this manual and applicable sections of System Sensor’s Projected Beam Detector Application Guide. Copies of this manual are available from System Sensor. General Description System Sensor Model 6424 is a long range projected beam smoke detector designed to provide open area protection. It is to be used with UL-listed, separately supplied power (4-wire) control panels only. The detector consists of a separate transmitter and receiver. Smoke entering the area between the transmitter and receiver causes a reduction in signal at the receiver. When the obscuration reaches one of two predetermined thresholds (chosen with a switch in the receiver), the detector generates an alarm signal. Complete blockage of the beam causes a trouble signal to avoid false alarms. Slow changes in obscuration due to a build up of dirt or dust on the lens of the detector are compensated for by a microcontroller which continuously monitors the sig nal strength and periodically updates the alarm and trouble thresholds. When the self-compensation circuit reaches its limit, the detector generates a trouble signal, indicating the need for service. Three LEDs at the receiver indicate the status of the detec tor: a red LED for alarm, a yellow LED for trouble, and a pulsed green LED for standby operation. The alarm signal latches and can be reset by a momentary power interrup tion, by using the remote reset input to the receiver if using the remote test/reset station model RTS451, or with the local reset button located behind the rear door in the receiver. A trouble signal automatically resets upon remov ing the cause of trouble. In addition to these indicators, there are four LEDs on both the receiver and the transmit ter 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) con tact for alarm signals and one Form B (normally closed) contact for trouble signals. Supervision of power is accom- plished by installing a Power Supervisory End-of-Line Relay Module (model A77-716) at the end of the detector power loop. When power is applied to and through the detectors, the EOL Power Supervisory Module is energized. The relay contacts, along with the detector’s trouble relay contacts, can provide a closed series circuit in the control panel’s alarm-initiating loop. 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. Parts List Description Quantity Receiver Unit 1 Transmitter Unit 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 1 Cable Exit Plug 1 Hole Plug 1 Detector Placement This section of the manual discusses the placement of pro jected beam detectors. Though this information is based upon industry expertise, it is intended to be used only as a technical guide. Always comply with the requirements of applicable codes and standards such as, NFPA 72, National Fire Alarm Code, as well as directives of the Authority Having Jurisdiction (AHJ). For general information on the placement of detectors, read System Sensor’s Projected Beam Detector Application Guide. Projected beam detectors are usually located with their beams parallel to the ceiling. However, they can be mount ed vertically or at any angle to protect the area involved. Since beam detectors sense the smoke buildup over a dis tance, they are ideal for locations with high ceilings. They can also be mounted on a wall or ceiling below the level of a spot type detector, reducing the effects of air stratifica tion. Some typical locations would include large areas with high ceilings such as atriums, warehouses, and factories. NOTE: Projected beam smoke detectors should always be mounted to stable mounting surfaces. See the MOUNTING LOCATION section for details. Some fire codes specify spacing on a given center-to-center distance between detectors under ideal conditions. These spacings are based on rooms with smooth ceilings and no physical obstructions between the contents being protected and the detectors. Moreover, they are also based on a maxi mum ceiling height, and on the assumption that the value and the combustible nature of the contents of the room being protected do not warrant greater protection or closer spacing. D400-18-00 2 I56-494-13R PRINTED IN MEXICO
- The beam detector can be mounted with the receiver
selected spacing (7.5 ft. maximum if the spacing is 30 ft.). Figure 1. Spacing for smooth ceiling (side view): Figure 2. Spacing for smooth ceiling (top view):
30 FEET MINIMUM
330 FEET MAXIMUM
ally be mounted between 12 and 18 inches from the ceiling. of the contents in the area to be protected. Figure 3. Sloped ceiling (shed type): Figure 4. Sloped ceiling (peaked type): eliminate false alarms and nuisance trouble signals. structural beam, joists, or other such surfaces.
transmitter to be used during the alignment procedure. the remote test station (RTS451 or RTS451KEY). Figure 9. Remote annunciators:
6424 REMOTE OUTPUTS
Figure 10. Remote Test Station: before installing the detectors.
- The clear protective film and warning label on the
- Mount brackets and connect cables properly as detailed
- Insert the flange of the detector mounting bracket into
the keyed hole of the wall or ceiling mounting bracket. should now hang from the bracket.
- Insert the correct screw and washer combination (either
- Open the sliding access door on the back of the unit.
- Plug cable connector into slot in metal barrier, observing
proper orientation (see Figures 14 and 15).
- Repeat for the other unit.
- IMPORTANT: If the detector spacing is between 30 and
filter and install as shown in Figure 11. Figure 11. Additional filter required for installations Figure 16. Front View Transmitter and Receiver
Figure 14. Rear view receiver:
16 CONDUCTOR
Figure 15. Rear view transmitter:
6 CONDUCTOR
4 RED LEDs USED
2 SECONDS IF POWERED UP AND
Figure 17. Alignment adjust pot (receiver only): between the transmitter and receiver. range selection switch (SW2) on the transmitter. mitter directly at the receiver, then go to step 5. the transmitter directly at the receiver. Detectors for Fire Protective Signaling Systems. no effect on the detector sensitivity. 7) Turn on power to the system.
indicate alignment mode, but the trouble relay will not activate. If the receiver is left in the alignment mode for more than an hour, the trouble relay will activate. 9) Point the receiver directly at the transmitter. B) RECEIVER ALIGNMENT PROCEDURE: 1) Align the receiver by slowly moving it back and forth, and up and down until all four LEDs light. (NOTE: If it is impossible to get all four LEDs to light, the trans mitter may need to be adjusted. Go to the transmitter and align it so that all four LEDs light, and then go back to the receiver and continue with step 2.) 2) Adjust the alignment adjust pot until only three align ment LEDs are lit. 3) Further align the receiver by slowly moving it back and forth, and up and down, trying to get all four LEDs to light. REPEAT STEPS 2 AND 3 UNTIL IT IS IMPOSSIBLE TO GET MORE THAN THREE LEDs TO LIGHT. (NOTE: If steps 2 and 3 are carefully executed, it should take two to five tries to align the receiver.) 4) Carefully tighten the horizontal adjustment screws first and then the two vertical adjustment screws on the receiver bracket, making sure all three alignment LEDs remain lit. C) TRANSMITTER ALIGNMENT PROCEDURE: 1) Slowly move the transmitter back and forth, and up and down, trying to get all four LEDs to light. 2) If four LEDs light, adjust the alignment adjust pot on the receiver until only three alignment LEDs are on. REPEAT STEPS 1 AND 2 UNTIL IT IS IMPOSSIBLE TO GET MORE THAN THREE LEDs TO LIGHT. (NOTE: If steps 1 and 2 are carefully executed, it should take between two and five tries to achieve this.) 3) When it is impossible to get more than three LEDs to light, carefully tighten the horizontal adjustment screws and then the vertical adjustment screws on the transmitter bracket, making sure all three alignment LEDs stay lit. 4) Slide the alignment switch on the transmitter to the NORMAL MODE (N) position (see figure 15) and disconnect any temporary wiring. Carefully close the door on the transmitter and go to the receiver. 5) Verify that three alignment LEDs are lit and switch back to NORMAL MODE (N) at the receiver. It is important that three alignment LEDs are on (not four) when leaving alignment mode. This ensures that the amplifier is not saturated with signal and will be capable of detecting smoke within its sensitiv ity limits. Wait at least one minute before continuing. Do not block or disturb the beam while it is calibrat ing. Any interference could cause a trouble signal. If there is a trouble signal during this period, switch the receiver back to ALIGN MODE to make sure that only three LEDs are lit. Switch back to NORMAL MODE and wait again. If three alignment LEDs are not on, repeat the transmitter alignment procedure. 6) When the detector has completed it’s self-calibration, the green (normal) operation LED will flash every two or three seconds. Alignment is now complete. Sensitivity Total obscuration can be converted to percent per foot, assuming uniform smoke density for the entire length of the beam. The chart below converts total obscuration to percent per foot at both 30% and 55% sensitivity settings. SENSITIVITY IN %/FT VS DISTANCE ASSUMING UNIFORM SMOKE DISTRIBUTION DISTANCE (FEET) OBSCURATION (%/FT) 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 1.3 1.2 1.1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 = 30% Sensitivity Setting = 55% Sensitivity Setting C0552-00 Sensitivity Testing NOTE: Before testing, notify the proper authorities that the smoke detector system is undergoing maintenance, and therefore the system will be temporarily out of service. Disable the zone or system undergoing maintenance to prevent unwanted alarms. Detectors must be tested after installation and following periodic maintenance. The sensitivity of the 6424 may be tested as follows: D400-18-00 10 I56-494-13R PRINTED IN MEXICO
NOTE: Before testing the detector, check for the presence of the flashing green 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 wir ing). A. Calibrated Test Filter 1. Test the detector at the receiver. 2. Use the proper side of the test card depending on the sensitivity setting (55 or 30) of the detector. 3. Place the NO ALARM section of the test filter over the receiver lens. The green LED should continue to pulse and the detector should not alarm after 15 seconds. 4. Place the ALARM section of the test filter over the lens. The detector should alarm within 15 seconds. 5. The detector can be reset with the local reset, remote reset, or by momentarily interrupting the power. 6. Notify the proper authorities that the system is back on line. 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. B. 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. See Figure 9 (Remote Test Station) for wiring diagram. If the detector is not in trouble and the unit fails to alarm, check all related wiring. Once the proper wiring is con firmed, perform the above calibrated test filter procedure. If the unit still fails to alarm it should be returned for repair. Maintenance NOTE: Before cleaning the detector lenses, notify the proper authorities that the smoke detector system is undergoing maintenance, and therefore the sys tem 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 align mode. If three and only three alignment LEDs turn on, slide the align switch back to normal mode and wait approximately one minute for self calibration. The green LED should pulse after the calibration time. If more or fewer LEDs turn on in align mode, see the Beam Alignment Instructions on page 9 for realignment. 3. Notify the proper authorities that the system is back on line. Special Note Regarding Smoke Detector Guards Smoke detectors are not to be used with detector guards unless the combination has been evaluated and found suitable for that purpose. D400-18-00 11 I56-494-13R PRINTED IN MEXICO
©2004 System Sensor PRINTED IN MEXICO Three-Year Limited Warranty System Sensor warrants its enclosed smoke detector to be free from defects in materials and workmanship under normal use and service for a period of three years from date of manufacture. System Sensor makes no other express warranty for this smoke detector. No agent, representative, dealer, or employee of the Company has the authority to increase or alter the obligations or limitations of this Warranty. The Company’s obliga - tion of this Warranty shall be limited to the repair or replacement of any part of the smoke detector which is found to be defective in materials or workmanship under normal use and service during the three year period commencing with the date of manufacture. After phoning System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization number, send defective units postage prepaid to: System Sensor, Repair Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please include a note describing the malfunction and suspected cause of failure. The Company shall not be obligated to repair or replace units which are found to be defective because of damage, unreasonable use, modifications, or alterations occurring after the date of manufacture. In no case shall the Company be liable for any consequential or incidental damages for breach of this or any other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by the Company’s neg ligence or fault. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state. FCC Statement This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful inter - ference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Note: 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 canradiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio commu nications. 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 off and on, the user is encouraged to try to correct the interference by one or more of the following measures: – Reorient or relocate the receiving antenna. – Increase the separation between the equipment and receiver. – Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. – Consult the dealer or an experienced radio/TV technician for help. Please refer to insert for the Limitations of Fire Alarm Systems