GB.ELQZ428.050101 Installation Smoke Detector ELQZ-2-428-2, GOLD General The ELQZ-2-428-2 smoke detector is used for measuring any smoke present in ventilation ducts. It consists of an ionising detector mounted in an adaptor system where both the tube and enclosure are designed for optimum airﬂow through the detector. The system meets all the ﬁre safety requirements for air velocities between 0.2 m/s and 20 m/s. The smoke detector is used together with a control unit (ﬁtted inside an ELQA equipment cubicle or a separate equipment cubicle for the smoke detection and warning function) for controlling fans, ﬁre and smoke dampers. Operation If any smoke is detected, a red LED on the detector lights up and the detector transmits an alarm signal to the control unit. Any accumulation of impurities in the smoke detector will make it more sensitive and gradually approach its alarm condition. To avoid unnecessary alarms caused by fouling, the detector is equipped with a service alarm (green LED). When lit, this LED indicates that the detector ought to be cleaned. Dimensions Venturi tube length 600 mm. Tecnical details Type of detector Ionising Power supply Power consumption: In-operation Service alarm Smoke alarm Permissible ambient temperature Permissible humidity Inclosure Class Weight 24VDC (from control unit) Max 0,04mA ~ 13mA ~ 48mA -20°C to +50°C Max 99% rH IP54 800g Accessories The ELQZ-1-428-2-1 Mounting bracket should be used for mounting the detector on a circular or insulated duct. Maintenance Whenever the smoke detector becomes fouled, it will be more sensitive and may trip the service alarm. This situation can easily be delayed by vacuum cleaning the detector once a year. (All dimensions in mm) Speciﬁcations are subject to alteration without notice. www.swegon.se 1 ØD dh = GB.ELQZ428.050101 2xHxB H+B H B Installation and Location Examples of sources of disturbance MIN 5xdh MIN 3xdh MIN 3xdh GX DAMPER MIN 5xdh MIN 3xdh GX GX MIN 5xdh GX GX SILENCER MIN 3xdh GX GX COIL MIN 5xdh GX GX Hydraulic diameter CIRCULAR DUCT MIN 5xdh GX MIN 3xdh BRANCH dh = D MIN 3xdh GX ØD MIN 3xdh 2xHxB H+B H MIN 3xdh GX MIN 5xdh EXTRACT AIR SUPPLY AIR MIN 5xdh GX GX MIN 5xdh MIN 3xdh GX MIN 5xdh GX GX MIN 3xdh GX GX GX GX AIR HANDLING UNIT MIN 5xdh GX MIN 3xdh GX ADAPTER B MIN 3xdh MIN 5xdh GX RECTANGULAR DUCT MIN 3xd h MIN 5xdh GX FAN BEND dh = MIN 3xdh GX GX MIN 3xd h Install the smoke detector with the airﬂow direction arrow on its cover pointing in the direction of airﬂow through the ducting. The detector can be mounted on the side or top of the duct for vertical or horizontal air ﬂow. If the ambient temperature varies radically, for example outdoors or in cold attics, insulate the detector to protect it from the ambient air and prevent the formation of condensation inside the detector housing. To ensure satisfactory smoke detection, the smoke detector should be located at a distance, in the direction of airﬂow, that is equivalent to at least 3 x the hydraulic diameter of the duct upstream of the nearest source of disturbance in the ducting (see the examples of sources of disturbance below). If it is located downstream of the nearest source of disturbance, its distance from this source should be equivalent to at least 5 x the hydraulic diameter of the ducting. MIN 5xdh GX GX MIN 5xdh GX MIN 3xdh MIN 3xdh 2 AIR HANDLING UNIT www.swegon.se MIN 3xdh GX MIN 5xdh GX Speciﬁcations are subject to alteration without notice. GB.ELQZ428.050101 1 2 Drill an opening in the duct. • 35 mm dia. opening for smoke detector without mounting bracket. • 50 mm dia. opening for smoke detector with mounting bracket (see item 10). � � Do not cut this end! End plug. • Measure the ventilation duct. • Cut the tube to an appropriate length, if needed. • The tube should penetrate 90% of the duct diameter into the duct. • Insert the end plug. 3 • Lock the tube in position by means of the stop screw. • Slip the seal onto the tube. • Insert the tube in the bottom of the detector housing. IMPORTANT! The arrow on the plastic cover must point in the same direction as that of the air ﬂowing through the duct. 4 • Mount the tube and the detector on the duct. • Secure the detector housing at the 3 points indicated by the arrows. Speciﬁcations are subject to alteration without notice. www.swegon.se 3 GB.ELQZ428.050101 5 Flow indicator. CAUTION! The indicator doesn't rotate; it rocks. If the indicator doesn't move at all, it is advisable to consider relocating the detector. 6 Insert the block. 7 Electric wiring. If only one smoke detector is connected to the system, install the ﬁnal resistor (2,2kΩ) in this detector. If several smoke detectors are to be connected to one control unit, wire the ﬁnal resistor (2,2kΩ) in the last detector in the loop. Fit only one resistor per loop! 4 www.swegon.se Connect the electric wiring as shown in the wiring diagram. Speciﬁcations are subject to alteration without notice. GB.ELQZ428.050101 8 Performance checks. Check that the detector operates correctly. Expose the detector to smoke from a match or a suitable spray for testing smoke detectors. 9 Secure the cover by means of screws. Fit the cover on the detector. Do not drill any holes in the plastic cover for ﬁtting identiﬁcation plates or the like. Doing so will cause leakage, which will seriously impair detector performance. Speciﬁcations are subject to alteration without notice. www.swegon.se 5 GB.ELQZ428.050101 10 ELQZ-1-428-2-1 Mounting bracket for a circular duct or an insulated rectangular duct. The mounting bracket enables the detector to be installed on a duct having a diameter as small as 100 mm. Secure the legs Fästbracket � of the beslagets� to the duct. ben på kanalen. Håltagning� Ø 50 mm. Opening: Ø 50 mm The bracket is easy to bend/form Beslaget är lätt att böja/forma så att det�to ﬁt onrunda circular ﬂatkanaler. duct surfaces. passar elleror plana Beslaget levererasisplant. The bracket supp- lied completely ﬂat. Gummi-� Rubber seal Rund kanal. Circular duct tätning. Gummi-� Rubber seal tätning. Isolerad plan kanal. Insulated rectangular duct FINAL INSPECTION • Make sure thatthe arrow on the detector cover points in the direction of airﬂow. • Check that the cover and its gasket seals properly against the base and that nothing is lodged in between them, such as insulation. • Check that the plug is properly seated in the test hole. • Check that the ﬂow indicator indicates airﬂow (is rocking). • It is advisable to test the performance of the detector in full scale. Fault tracing. The smoke detector indicates a service alarm. • The detector has become fouled and needs to be cleaned. This can appropriately be done by vacuum cleaning or by carefully blowing surfaces clean with compressed air. • The service alarm may trip sooner than expected if the newly installed ducting hasn’t been properly cleaned before the system is commissioned. The smoke detector initiates an alarm when no smoke is present. • The smoke detector has been located where condensation can form inside it, such as outdoors, in a cold attic, a kitchen or the like. 6 www.swegon.se An alarm is indicated by the control unit only. • Measure the resistance of the loop (2,2kΩ) from the control unit. • Check that the control unit is OK by wiring the ﬁnal resistor to the smoke detector output on the control unit. • Use a voltmeter to check that 24 V DC with the correct polarity is present in the socket below the detector. Speciﬁcations are subject to alteration without notice.
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