Duct Smoke Sensor KRM® • VdS certification (G210059) • Patented single tube air sampling system • Contamination display in % and signalling at 100 % • Electronic air flow control • Externally operable reset button in the housing • Remote reset option via terminals • Long service life, low contamination Technical Data Sensor: Scattering RM 3.3 (ALK-E) Supply voltage KRM-1: 230 V AC ± 10 %, 50/60 Hz Supply voltage KRM-2/KRM-2-MOD: 24 V AC/DC +15 % / -10 % Rated current: KRM-1: 30 mA KRM-2/KRM-2-MOD: 120 mA Relay outputs: floating Alarm relay locked: 1 changeover contact, 8 A, 250 V AC or 24 V DC 1 NC, 8 A, 250 V AC or 24 V DC Contamination relay: 1 NC contact, 6 A, 250 V AC or 24 V DC Operating temperature: -10 °C - +50 °C Permissible humidity: 10 - 95 % non-condensing Protection class: IP 54, IP 65 with WDG (water resistant housing) Approvals: Sensing chamber and air duct frames: VdS approval G210059 Tested: according to FprEN54-27 LED display: % contamination level flashes at > 70 % LED in housing: green operating blue lack of air flow yellow failure, electronics, smoke detector defective, low voltage red smoke alarm, including contamination > 99 %, flashes at attempts to release when the sensing chamber is not empty Adaptergehäuse: ABS Air measuring tube: Aluminium / plastic shortest length 160 mm standard length 600 mm Dimensions: 257 x 166 x 77 mm (L x W x H) Screw connection: 3 x M16 Accessories Mounting bracket: Housing: KS (for insulated / circular ducts) waterresistant housing for outdoor installation and increasing protection class to IP 65 Function The KRM duct smoke detector is designed for smoke detection in ventilation ducts. It constitutes a combination of a smoke detector with an adapter system, whose measuring tube and housing have been specially adapted for optimal air flow through the smoke detector. The multi-chamber measuring tube in the air duct transports the air within the air duct along the entire length of the tube, through the sensing chamber and back into the air duct. Upon detection of smoke, the sensor reacts immediately and triggers an alarm. Over time, the sensor becomes contaminated. Because of alarm threshold tracking, the sensitivity up to total pollution remains the same. From 70 % contamination upwards, the sensor is triggered and indicates this by flashing. If the sensor is not replaced the smoke alarm is triggered at 99 % contamination. The contamination level is indicated in a two-line LED display; at > 70 % it flashes. To verify operability, the device is equipped with electronic air flow monitoring, which lights a blue LED at < 1 m/s. The failure LED illuminates when the smoke sensor or the electronics are defective, in the absence of a smoke sensor, and with shortcircuits or cable breakage. The smoke alarm must be released with the reset button. A functionality test is also possible with the same button. The operation functions like a smoke alarm. Furthermore, the same function takes place on restart or when the bridge circuit between terminals 9 and 10 is opened (remote release). Fire Protection | Data sheet No. 41300 | Version 01-2011 | 1 | 8 Duct Smoke Sensor KRM 8 14 7 10 11 6 5 1 4 14 11 12 9 13 10 9 2 3 Electrical connection Power supply 230 V AC Test/Reset 1 2 3 4 Power supply 230 V AC 9 10 11 12 13 14 15 16 17 green 13 12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Adapter plate with gasket Patented measuring tube (max. length 3 m) End cap Rubber bushing (only for insulated or circular ducts) Lower housing with seal Electronics Optical smoke sensor Upper casing with seal Red LED: alarm / reset button Yellow LED: interference LED display: % of sensor contamination LED green: in operation LED blue: air flow under 1 m / s Opening for test gas Air duct Power supply 24 V AC/DC Test/Reset Test/Reset Smoke alarm red Smoke alarm Service signal Contamination 1 2 3 4 Power supply 230 V AC 9 10 11 12 13 14 15 16 17 Test/Reset Smoke alarm red Smoke alarm Service signal Contamination yellow yellow blue blue KRM-1, 230 V Power supply 24 V AC/DC Test/Reset KRM-2-MOD, 24 V KRM-2, 24 V KRM-1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Power supply 24 V AC/DC green Bus B Bus B Bus A Bus A green KRM-2 Programming the Bus address for the KRM-2-Mod: Press buttons T3+T4 on the circuit board (to the right, next to the display) at the same time, so that the display changes from contamination level to show the bus address (the display will flash). Press button T3 or T4 to adjust the desired address (1-99). The last set bus address is automatically saved. The display resets automatically after 3 seconds or by simultaneously pressing T3+T4. Test/Reset Smoke alarm red Smoke alarm Service signal Contamination yellow Contact depictions are with the power off (alarm) blue KRM-2-MOD Notes: The floating switching contacts (terminals 11-17) are uniformly assigned to an installation category according to EN 60730-1. These switching contacts are only to be used for 230 V AC or 24 V AC/DC, a combination is not permitted. A mixed connection of safety extra-low voltage (SELV) and low voltage must not occur. The assembly may only be operated on one mains phase. 2 | 8 | Fire Protection | Data sheet No. 41300 | Version 01-2011 Duct Smoke Sensor KRM Installation Instructions Accessories Install the detector where flow meters, etc. are normally fixed, so that the air flow can run in a laminar manner with the measuring tube. Follow the installation instructions. All work must be carried out by sufficiently qualified craftsman. Splash-proof housing (type WDG) for outdoor installation to prevent condensation. The housing is lined with insulating foam. Current local rules and regulations (e.g. building regulations, elecrical/VDE guidelines, etc.) are to be observed. Installers and operators are required to be adequately informed before operation. We assume no liability for misprints and changes after printing. Compliance with operating and installation instructions is also included within the regulations of intended use. We assume no liability for damages caused by improper use. Operating licenses and guarantees and all warranty claims will be voided in the event of unauthorized modifications or any tampering with the device. Mounting bracket Type KS is required if the duct smoke sensor must be mounted on round air ducts. The bracket can also be used with insulated rectangular ducts. For this the adapter is mounted with the air measuring tube before insulation. Maintenance Targeted maintenance can be carried out since the smoke detector is equipped with a contamination indicator. From a 70 % contamination level or higher the smoke sensor must be changed. There is a contact available for this signal, and it should be connected to the automation station. Installation and positioning 1. 3. We recommend that the duct smoke detector be installed at the same distance to heating, cooling and humidity equipment and be mounted similarly to flow sensors. The distance of the smoke sensor to fittings, valves, filters, etc., should be 3 times the diagonal length of the cross-section of the duct when going against the air flow, and 5 times the diagonal length with the flow. • Determine how long the measuring tube must be. • • The TurboTube measuring tube must be inserted into the duct at least to the middle of the duct‘s cross-section. If necessary, shorten the tube. Minimum length 160 mm. Deburr the cutting face and put the end plug back on up to the stop collar. 2. Drill a hole of 43-44 mm in diameter at the intended mounting location. Note: Installation of the TurboTube measuring tube is possible either from the top, bottom or side of the channel for all duct cross-sections (for round ducts as well). Min. 160 mm Attention: Operation without end plug not permitted. Fire Protection | Data sheet No. 41300 | Version 01-2011 | 3 | 8 Duct Smoke Sensor KRM 4. • Determine the direction of flow and fit the adapter plate • so that the line on the adapter plate under the text „Strömungsrichtung“ is parallel to the flow direction. Four self-tapping screws serve for attaching it to the sheet metal duct (not included in delivery). 5. Installation on a rectangular air duct 6. Installation on a circular air duct Mounting bracket • For mounting on a circular air duct use mounting bracket type KS and the rubber bushing. Thanks to the bend perforations they can be adapted to a round duct. The type KS mounting bracket is supplied flat. 7. Installation on air ducts with insulation • Use the rubber bushing and insert it into the Ø 43-44mm opening in the air duct. • Install the mounting bracket. • Insert the assembled adapter plate into the measuring tube by sliding the measuring tube through the grommet, and screw the adapter plate onto the mounting bracket using the 4 self-tapping screws. Then the insulation can be installed. 8. Installation outdoors or in a cold environment • As protection for smoke detectors, which are exposed to the open air or in a cold environment, there is a special WDG type housing. This enclosure prevents the warm air in the smoke detector duct from condensing. 4 | 8 | Fire Protection | Data sheet No. 41300 | Version 01-2011 inner Rubber bushing Mounting bracket Insulation outer Duct Smoke Sensor KRM 9. Installing the housing with the sensor • Attach the housing bottom part with the electronics and sensor • • to the adapter plate. The housing can be attached at increments of 90 °. The direction of the housing has no effect on the measurement result. You can align the housing with the sensor optimally. Check that the seals in the housing upper part are correctly positioned. By snapping on and tightening the upper housing and then firmly pressing down on the arrow marked on the central cable area (to ensure that the catch at the lower end of the housing snaps in correctly) the mounting is complete. 10. Testing the duct smoke sensor • After completing the installation work, doing proper wiring and applying power, the duct smoke sensor is operational. • The green LED (12) illuminates. • By pressing the alarm/reset button (9), an initial simple • functional test can be made. All LEDs must light up and all the relays drop out. The units connected to the relays are activated! The display (11) indicates the current degree of sensor contamination. If the button is released, all LEDs will go out except for LED (12) which shows the supply voltage, and the relays activate. For testing the smoke sensor the housing must not be opened. It has a self-closing test opening (14) in the center of the transparent cover. Use Oppermann test gas spray. Insert the test spray‘s tube fully into the test opening (appx.1.5mm deep) and release as much test gas as needed until the smoke sensor activates. The alarm/reset button lights up, the relays drop out. The electronics are on alert and locked. To release, the alarm/reset button must be pressed. At the time of the reset, the sensor must be free of smoke and test gas. Should there still be test gas in the chamber a higher degree of contamination will appear. In this case, after some time perform a reset by disconnecting from the power or by an external reset. 11. Final review • Are all screws tight? • Is the adapter plate properly mounted for the flow direction? • Are all seals in the correct position? • In operation, when air flow > 1 m/s the blue LED may not light up. Fire Protection | Data sheet No. 41300 | Version 01-2011 | 5 | 8 Duct Smoke Sensor KRM Display and operation for Duct Smoke Sensor KRM LED Smoke alarm (red) LED Smoke alarm (red) LED Failure (yellow) LED Power supply (green) LED Alarm (red) and Alarm / reset button LED Air flow (blue) Failure reset: Briefly press button and release Alarm reset: Press button for at least 2 seconds until the red LED goes out Display Meaning Start / calibration Contamination in % Comments Shortly after starting the software version is displayed (4 digits), e.g. 00 then 17 = Software 0017. Thereafter, the rotating segment display follows at startup or after a power failure. Flashes starting at 70 %; at 99 % with display LED alarm. 00 – 99 Failure 88 00 – 99 flashing Confirmation reset / new start BUS adresse e.g. Missing smoke detector, disrupted communication with the smoke detector, processor failure. Failure LED & alarm LED light up at the same time (not on the DIBT version). Troubleshooting: Change the detector and confirm by pressing the alarm / reset button. If alarm / reset button is pressed for more than 8 seconds, or if terminal 9 / 10 is open (missing bridge circuit or remote reset). Display goes out after releasing the alarm / reset button Display only with MOD versions after pressing the address buttons T3 / T4 directly on the circuit board. 6 | 8 | Fire Protection | Data sheet No. 41300 | Version 01-2011 Duct Smoke Sensor KRM LEDs Meaning Comments Reset after failure: Briefly press alarm / reset button. KRM immediately restarts. Smoke alarm or Reset after alarm: failure (not on Press and hold the alarm / reset button for at least 2 seconds until the red alarm LED in the the DIBT version) button goes out. Do not release it until then. KRM will start again only after release. As long as the alarm / reset LED flashes when the button is pressed, the smoke sensor is still filled with test gas / test spray / smoke, and can not be reset. In that case blow the sensor out or wait. Alarm / reset (red) Defective circuit board or missing Check / replace circuit board or smoke detector RM 3.3 (ALK-E) smoke alarm Failure (yellow) Smoke alarm (2 x red) Smoke alarm Red LEDs directly on the smoke detector RM 3.3 (ALK-E). Red LEDs directly or contamination on the smoke detector RM 3.3 (ALK-E). LEDs permanently on until reset has taken place. 99 % Power (green) Supply voltage is on Green LED lights up if supply voltage is on Air flow (blue) Air flow is too low Blue LED lights up when air flow is too low. Check smoke detector position in the duct, check sampling tube (TurboTube) for contamination / clean if necessary. Behavior of the alarm relay and fault relay and displays, plus reset options Smoke alarm Device failure / missing detector… DIBT versions KRM-1-DZ / KRM-2-DZ KRM-1 / KRM-2 KRM-2-MOD DIBT versions KRM-1-DZ / KRM-2-DZ KRM-1 / KRM-2 KRM-2-MOD Alarm relay 11 / 12 / 13 Drops out Drops out Does not drop out Drops out Relais Alarm 14 / 15 Drops out Drops out Does not drop out Drops out LED Alarm / Reset Lights up Lights up Does not light up Lights up Relay failure 18 / 19 Does not drop out --------Not equipped Drops out --------Not equipped LED failure Does not light up Does not light up Lights up Lights up Alarm reset or failure reset Not with power interruption! It is mandatory to use the alarm button or terminal 9 / 10 provided that sensing chamber is free. With power interruption, alarm button or with terminal 9 / 10 provided that sensing chamber is free. Not with power interruption! It is mandatory to use the alarm button or terminal 9 / 10 provided that sensing chamber is free + disturbance has ceased. With power interruption, alarm button or with terminal 9 / 10 provided that sensing chamber is free + disturbance has ceased. Fire Protection | Data sheet No. 41300 | Version 01-2011 | 7 | 8 Duct Smoke Sensor KRM Dimensions 233 166 24 77 70 37.3 40 L= 160 - 3000 mm 50 Dimensions in mm Oppermann Regelgeräte GmbH | Im Spitzhau 1 | 70771 Leinfelden-Echterdingen, Germany Phone +49 711 72 72 35 60 | Fax +49 711 72 80 52 7 | [email protected] | www.oppermann-regelgeraete.de 8 | 8 | Fire Protection | Data sheet No. 41300 | Version 01-2011 Specifications subject to change.