POLON-ALFA DOP-6001 Optical Beam Smoke Detector Instruction Manual

POLON-ALFA DOP-6001 Optical Beam Smoke Detector

The DOP-6001 beam smoke detector, covered by this manual, complies with the requirements of the following European Union directives:

• CPD 89/106/EWG – on construction goods;
• EMC 2004/108/WE – on electromagnetic compatibility
• LVD 2006/95/WE – on low-voltage supply electric equipment.

The DOP-6001 detector has been approved with the EC Certificate of Conformity No. 1438/CPD/0219, issued by the Scientific and Research Centre for Fire Protection (CNBOP) Józefów, Poland, an EU notified authority No. 1438, confirming its compliance with the requirements of PN-EN 54-12: 2005 standard. The certificate can be downloaded from www.polon-alfa.pl

Read the manual carefully before the detector assembling and commissioned. Any non-conformity with the instructions contained in the manual may be harmful or may cause a violation of the law in force The manufacturer, POLON-ALFA shall not bear responsibility for any harm resulting from the unit application discordantly to the requirements of this instruction. A waste product, unsuitable for further use, shall be passed to a waste electric and electronic equipment collection point.

NOTE: The manufacturer reserves the right to change product specifications at any time without prior notice.

PURPOSE

The DOP-6001 Beam Smoke Detector is designed for smoke detection at the start of a fire. It is especially suitable for the protection of premises where, in the first phase of the fire, smoke appearance is expected and in which, due to a large space area, installation of a greater number of spot smoke detectors would be necessary. Beam smoke detectors (in comparison with spot smoke detectors) are sensitive to medium smoke density value on a long path of the infrared radiation beam and therefore they are especially suitable for application under high ceilings/roofs or in those places where smoke can be diffused over a large area before detection. Exemplary objects especially suitable for this type of detector installation are churches, cathedrals, monumental buildings with valuable historic ceilings, theatres, sports halls, industrial shops, very high rooms, in which spot detectors would be ineffective, and rooms with differentiated ceiling or roof design. A distinctive feature of the DOP-6001 detector is its arrangement of a transmitter and a receiver in one enclosure and interaction with a prism reflector or a reflector panel placed on the opposite wall. A single casing embraces a laser target viewfinder that enables optical path axis alignment between the detector and the reflector/reflector panel. The DOP-6001 beam smoke detector is intended for installation in the POLON 4000 system fire detection and alarm control panel lines. The detector operates in closed premises at ambient temperatures ranging from –25 oC to +55 oC and relative humidity up to 95 % at 40 oC.

TECHNICAL SPECIFICATIONS

• Operating voltage in a detection line 16.5 V ÷ 24.6 V
• Max. current consumption in detection line < 300 μA
• Detector address and sensitivity thresholds programmable at the control panel
• Detector operating voltage in a conventional line 10.5 V ÷ 24.0 V
• The quiescent current in a conventional line is 5 mA or 2.2 mA depending on the system
• Alarm current at 20 V 20 mA
• Current at light beam break < 0.3 mA
• Current at service signal – optics soiling < 0.3 mA
• Sensitivity thresholds (to be chosen) 18 %; 30 %; 50 %
• Operating distance
  • with E39-R8 prismatic reflector (Fig. 6) from 5 m to 50 m
  • with 4xE39-R8 reflector panel (Fig. 7) from 50 m to 100 m
• Detector angular tolerance ± 0.5 °
• Reflector angular tolerance ± 5 °
• Number of detectors in POLON 4000 addressable line 64
• Number of detectors in one conventional line 1
• The power supply of the laser viewfinder (during alignment) 6F22 (9 V) battery
• Operating temperature range -25 °C ÷ +55 °C
• Admissible ambient relative humidity up to 95 % at + 40 °C
• Dimensions 129 x 80 x 84 mm
• Mass (together with adjustment basis) 0.35 kg
• Casing color white (other on request)
• Suitability in test fire detection TF1, TF2, TF3, TF4, TF5, TF7, TF8

PRINCIPLE OF OPERATION

The DOP-6001 detector consists of an infrared (IR) light transmitter and a receiver located in a single enclosure, and an interoperating separate E39-8R prism reflector or 4xE39-8R reflector panel. The detector principle of operation consists of continuous analysis of optical air transparency in a space between the detector and the reflector (reflector panel). The detector can be in one of four modes: supervision, alarm, fault–light beam break, and fault – caused by contamination. If a certain, defined quantity of aerosol (smoke) is found in the air, reducing optical transparency below a set threshold, then the detector enters an alarm mode. Complete interruption of the radiation beam (or its reflection due to an object occurrence in its optical path) is signaled as a fault because even the largest smoke concentration in the air does not cause an entire break of the detector’s optical path. When the air is clear, the detector is in supervision mode. Long-lasting detector operation, especially in high dust level premises, may lead to contamination (dust build-up) of optical parts of the detector and the reflector/reflector panel. To maintain constant sensitivity and fire detection ability over a long period, the detector is equipped with automatic compensation circuits to monitor its contamination and environmental impact conditions. The circuits ensure the same sensitivity threshold in the whole compensation range. At a certain contamination level, the detector signals a fault mode denoting a necessity to undertake servicing and cleaning works. However, even in this mode, the detector is still able to detect smoke and initiate an alarm. A contamination-caused fault requires cleaning works of the reflector/reflector panel and the detector front surface. After cleaning, the detector adjusts to new external conditions and automatically changes its mode from fault to supervision. Communication between the POLON 4000 system control panel and the DOP-6001 detectors is provided using a two-wire detection line. A unique, fully digital communication protocol enables transmission of any information from the control panel to the detector and vice versa, such as surrounding conditions evaluation (smokiness, temperature), their change tendency, and the current analog value of temperature and smokiness density. The DOP-6001 addressable smoke detector is equipped with an internal short circuit isolator, which cuts off the efficient detection line from a shorted section, enabling the detector to further unfailing operation. The analysis function in the DOP-6001 detector is fulfilled by a microprocessor. After the detector optical path alignment and initiation of the analysis process at the control panel level (detectors in an addressable line), or pressing the START push button (detectors in a conventional line), microprocessor circuits analyze the ambient temperature and the settled sensitivity threshold. A self- adjustment program is switched on after entering these data into the detector memory. The self-adjustment process terminates after achieving a reference value with  a 5 % tolerance. Afterwards, the decision criteria are drawn up for various fire phenomena runs, for instance for fast or slow fire development. The data are kept in the detector’s non-volatile memory and periodically checked. Any measured value change (against the assumed decision thresholds) caused by smoke, after triple verification, is treated by the microprocessor as a fire.

DESIGN

The DOP-6001 detector design is shown in Fig. 1 and Fig. 3. The detector casing, made of plastic, embraces electronic circuits and optical elements of a transmitter and a receiver as well as a laser diode that facilitates the detector’s easy optical alignment. The lenses for infrared beam focusing are covered with a detachable filter. On the detector’s back side a connecting block is mounted, to connect power supply wires. The detector is fastened to the wall with a metal adjustment basis. On the detector front part, illuminating diodes are placed as well as the START push button that initiates the detector adjustment process.

The illuminating diode color signals accordingly:

• green one – a state of the detector self-adjustment to the detector-reflector/reflector panel distance, when the signal level is too high;
• yellow one – a state of the detector self-adjustment to the detector-reflector/reflector panel distance, when the signal level is too low;
• red one – an alarm mode;
• no light – a supervision mode after proper adjustment of the detector with the reflector/reflector panel.

The START push button enables initiation of the detector adjustment process (self-adjustment) and the detector parameters renewed set-up after optical parts cleaning works.

INSTALLATION

The DOP-6001 detector interoperates with a reflector panel and then its operating distance ranges from 50 m to 100 m, or with an E39-R8 prism reflector at the operating distance between 5 m and 50 m. It is possible to install up to 64 DOP-6001 detectors in one POLON 4000 system addressable line. The reflector or the reflector panel as well as the M42-00 00 00 service kit, containing test foils and an adjustment mirror, are not included in the detector standard pack and should be ordered separately. Up to 64 DOP-6001 detectors can be installed in one addressable detection line of the POLON 4000 system. Only one DOP-6001 detector without end-of-line resistors can be installed in one conventional line. In case the detector is seen with difficulty or is installed in a hardly accessible place, it is possible to connect the WZ-31 additional operation indicator to be placed in a convenient and visible place. Before installation, it is necessary to declare an alarm mode and a sensitivity threshold. The operations are executed using appropriate jumpers placed on the back side of the detector casing, under Fig. 6. One of the criteria taken into consideration when choosing sensitivity may be the distance between the detector and the reflector/reflector panel, and so:

• for a distance from 5 m to 20 m – 18 % sensitivity is recommended;
• for a distance from 20 m to 50 m – 30 % sensitivity is recommended;
• for a distance from 50 m to 100 m – 50 % sensitivity is recommended.

It is possible to set sensitivity level experimentally: adopting it to a certain environment in the case of the detector difficult operating conditions. The DOP-6001 detector and the reflector/reflector panel are mounted on opposite walls, pillars, or other construction elements of the premises. The walls or pillars must be stable and vibration-free. The detector adjustment basis should be mounted on a wall and the reflector/reflector panel – on the opposite wall. The detector should be placed on the adjustment basis (Fig. 3) after the preliminary connection of the wires to the connecting blocks by Fig. 4. The detector should be fixed to the basis with three screws that are accessible from the front side (after removing the cover). Then a 6F22 battery should be connected to the laser viewfinder contacts. Before alignment, the mirror (part of the service kit) should be placed on the reflector panel and pressed down, as it is shown in Fig. 9. With the help of three positioning screws, the detector laser beam should be aimed at the center of the reflector or the mirror from the service kit. The adjustment screws help in precise alignment so that the laser beam returns to the detector front plate after being reflected from the reflector. The mirror should be removed after proper regulation of the optical path between the detector and the reflector. The prism reflector position cannot be adjusted and it is recommended to fix it to a flat substrate with screws or glue. The detector is properly aligned with the reflector/reflector panel when the reflected laser light illuminates the detector. In such a situation the external battery should be disconnected, the detector cover should be mounted and the START push button should be pressed. As a result, one of the diodes: yellow or green shall be lit in a pulsed manner. After ca. 40 sec. the diodes should switch off, which stands for a proper adjustment of the infrared beam to the distance between the detector and the reflector/reflector panel. During this adjustment process, the detector, being connected to a control panel, signals a fault mode. After pressing the START push button and adjusting the distance between the detector and the reflector/reflector panel, the detector enters a supervision mode.

Note
The detectors should not be exposed to direct sunlight operation. The detector/reflector alignment with the help of a laser beam should be carried out in a dark room.

OPERATING CONDITIONS AND MAINTENANCE

The DOP-6001 smoke detector’s long-lasting operation, especially in dusty premises, may result in contamination (dust, dirt accumulation) of the optical part of the detector and the reflector/reflector panel. After exceeding a program-determined contamination compensation range, the detector transmits a fault signal to the control indicating the necessity to call a maintenance technician. The detector is still able to detect fire threats and enter an alarm mode. The contamination-caused fault notification entails cleaning of the reflector/ reflector panel and the detector front plate. After cleaning the above-mentioned elements, the START push button (located inside the detector) should be pressed to adjust the detector to new external conditions. After the adjustment, the detector automatically alters its mode from a fault to a supervision one. It is possible to check the proper operation of the DOP-6001 detectors installed in fire detecting systems during their maintenance inspection by concealing partly the detector’s optical path. It can be carried out using a special damping plastic foil with overprints appropriate to the detector’s three sensitivity levels – 18%; 30%; and 50% (Fig. 10). A plastic sheet with overprint consistent with the detector set sensitivity level should be put on the detector front plate, what should trigger an alarm mode. The DOP-40R detector testing foil with overprints is included in the service kit. During renovation or painting works carried out in the premises where detectors are installed, the detector and reflector/ reflector panel should be taken out. Detectors that are damaged in the time of painting and renovation works due to a fault of the persons, who execute them, are not subject to warranty repairs.

SAFETY CONDITIONS

Repairs and maintenance
Any maintenance works or periodic inspection shall be executed by skilled personnel employed by companies being authorized or trained by POLON-ALFA. Any repairs must be carried out by the manufacturer. POLON-ALFA bears no responsibility for the operation of any apparatus being serviced and repaired by unauthorized personnel.

Works at height
Any detector installation works carried out at height must be executed with particular care utilising tools and machinery in good working condition. Special attention shall be given to the stability of ladders, platforms, etc. Any electric tool shall be used strictly obeying the safety rules specified in the manufacturer’s instruction manuals.

Anti-dusting eye protection
It is obligatory to use protective anti-dusting glasses and masks during detector installation works that produce high amounts of dust, such as hole drilling for detector base mounting on ceilings/walls.

Eye protection against laser beam operating equipment
During the alignment of the detector’s optical path with the reflector/reflector panel using a laser viewfinder, special eye protection against direct laser exposure (3R laser equipment class) must be provided.

STORAGE AND TRANSPORT

The detectors should be stored in closed premises at ambient temperatures ranging from 0 oC to +40 oC and relative humidity up to 80 % at +35 oC, free from volatile sulfur compounds as well as acid and alkaline vapors. The detectors should not be exposed to direct sun; heating devices should not directly influence the detectors or their packing. The detector’s transportation should be carried out in transport packing using any transport means and obeying the transport recommendations given on the packages and securing protection against the possibility of mechanical damage and impact of temperatures lower than –40 oC and higher than +70 oC and relative humidity higher than 95 %.

DESIGN RECOMMENDATIONS

The DOP-6001 beam smoke detector operates properly, similarly to all other smoke detectors, in case it is installed at a height not exceeding 12 m. When it is mounted higher (up to 20 m), another row of detectors shall be provided at an intermediate level, with an adequately larger number of detectors. Maximum width (2D) of an area protected by one detector depends on the room height, according to the following table:

The maximum area protected by one detector in case the detector/reflector panel distance is 100 m for the ceiling height at 10 m amounts to (2D x 100 m) ca. 1300 m2, so the detector can replace a dozen spot smoke detectors.The distance between the detector IR beam and a side wall of room should not exceed D value and between two adjacent detector beams – 2D. The distance from the IR beam to any obstacle (e.g. a wall, perpendicular to a side wall) shall not be smaller than 0.5 m. The beam detector should constantly “see” the co- operating reflector, it is necessary to install it in such a way that its optical path is never – even temporarily – concealed by a moving object or equipment, such as cranes, hoists, etc. In the premises where people stay, the minimum installation height should amount to 2.7 m (so that outstretched upward arms do not disturb the optical path). This limitation is not valid in the case of low, long, or narrow spaces where people do not stay, e.g. cable channels, spaces above hanging ceilings, etc.

NOTE: The data listed in the table, especially the D operation radius value, which depends on a roof height come out from the calculations of the proportion of the beam detector arrangement versus spot detectors installed in a fire test chamber and comply with the data pursuant to VdS 2095:2005.It differs from the data stated in the PKN-CEN/TS 54-14:2006 technical specification in which the D radius is the same for all heights and is equal to 7.5 m.

Note: Only one detector (without an end-of-line resistor) can be installed in a conventional detection line, therefore no line output to the next detector is provided.

Declared sensitivity levels:

• jumper in position 50 %  low sensitivity
• jumper in position 30 %  medium sensitivity
• jumper in position 18 % – high sensitivity

In the case of the POLON 4000 addressable system, a sensitivity threshold is declared in the control panel and all jumpers should be taken out.

Interoperating line declaration

• no jumper
• jumper in ADC1 position
• jumpers in ADC38 and ADC1 position
• jumpers in ADC38 and ADC1 position
• POLON 4000 system addressable line
• TELSAP side line behind ADC1 adapter
• ALFA 3800 side line behind ADC1 adapter
• IGNIS 1000 or CSP-35 system conventional line.

References

• Polon-Alfa S.A. Czujka dymu,centrale sterujące oddymianiem,centrale sygnalizacji pożarowej,Telsap,centrala,Ignis,radiometr,pomiar promieniowania

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