Cerberus® AlgoRex DS11 Interactive and AnalogPLUS detectors Application guidelines Fire & Security Products Siemens Building Technologies Group
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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1. 1.1. 1.2. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Basic information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compliance with national guidelines and regulations . . . . . . . . . . . . . . . . . . . . 2 2 2 2.
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Introduction With AlgoRex it is possible to engineer high-tech fire detection systems with appropriate sensitivity and still be immune to false alarms.We must make full use of the possibilities offered. These application guidelines will help you to make the right decision in the choice of fire detection system. They particularly deal with the interactive system and the AnalogPLUS system.
1. General 1.1. Basic information With AlgoRex detectors we can engineer systems which, compared to the detectors used today, have a far greater immunity to the phenomena which cause false alarms. Target: Optimally sensitive fire detection systems with the greatest possible immunity to false alarms.
2. Choice of suitable detection systems AlgoRex comprises three different detection systems with corresponding signal evaluation: DS115x. INTERACTIVE Advanced technology with AlgoLogic DS113x AnalogPLUS Standard system with state-of-the-art technology DS110x COLLECTIVE System with proven technology You will find a brief description of the three systems in the appendix. 2.1.
2.1.1.
3. Choice of suitable detectors 3.1. Basic information The choice is between the two smoke detectors OptoRex and PolyRex, plus the heat detector ThermoRex for special cases where smoke detectors cannot be used. Other detectors are available for special applications. The decision on which type of detector and which parameter set or sensitivity to choose depends on the monitoring objective and the fire danger,and the prevailing deceptive phenomena. 3.1.1.
3.1.2. AnalogPlus Comparison between DO113x OptoRex and DOT113x PolyRex DO113x OptoRex – Detects smoke and similar aerosols – Detects smoke and similar aerosols as well as an increase in temperature – Electronics (ASIC) to evaluate smoke signals for alarm activation. – Electronics (ASIC) to evaluate smoke and temperature signals and combine them for alarm activation – Detects smouldering and smoke-forming fires, i.e.
3.2. Standard situation Normally, a detector can be chosen based on the following table, provided that disturbance variables are minor and occur only rarely. The principal criteria for choosing a detector and parameter set or sensitivity are the monitoring objective and the assessment of the fire risk exposure.
3.3. Disturbance variables present If disturbance variables occur periodically at the place of installation this can have an influence on the choice of detector (see table).The detectors are operated at a height of up to 6m in the least sensitive setting. Interactive system: Parameter set APS005S, provided there is no other parameter set specifically for the zone AnalogPLUS: Standard sensitivity with multi-verification However, in some cases the correct choice of detector and parameter set is not enough.
3.4. Special cases For applications with continuous disturbance variables the type of detector must be carefully chosen. The following table contains a list of special applications (selection) and the detector recommended. Leave the parameter set APS005S or standard sensitivity as default value. In places where disturbance variables cause the smoke detector to activate false alarms, use the ThermoRex (DT11xx).
Combustible Fire load Application Possible disturbance variables Chemical processes must be defined in each individual case Laundries – steam – humidity – electrical equipment – textiles – detergent – 2), 3) 2) Ironing rooms – steam, humidity – heat, dust – electrical equipment – textiles 2) 2), 3) – Restaurants – flambé cooking – smoking – furniture, textiles – gas, methylated spirit 3) 3) – Road tunnels: – auxiliary rooms – plant rooms – exhaust gas, humidity – corrosio
4. Setting of detector parameter and sensitivity 4.1. Interactive parameter sets The same algorithms (calculating formulae) are programmed into each detector of the same type. The installed algorithm need only be parameterized with a set of variable parameters. In this way the detector virtually receives a behaviour pattern that is optimally geared to the place of installation.
4.1.3.
4.1.4.
4.1.5. DOT1151/52 / DOT1151A-Ex PolyRex, parameter sets Parameter Risik APS083S Application examples ! – There is only a slight danger to life – Discotheques/dance halls – Low concentration of valuable property – Places of entertainment with – No danger of smouldering fire artificial smoke or fog – Aerosols arise regularly and for a length of time in ”Manned” – Caution, use very restrictimode. No simultaneous thermal influence. No or few aerosols vely! in ”Unmanned” mode.
Parameter Risik Application examples APS007S – Endangered people have limited mobility (difficulty in saving – Homes themselves) – Archives – High concentration of valuable property – High rate of air exchange – Building and contents would be seriously endangered in a fire – Smoking ban APS081S – Endangered people have limited mobility (difficulty in saving – Hospital wards themselves) – EDP – Very high concentration of valuable property – Museums – Smoking ban APS080SH ! – Persons endangered – Extremel
4.1.6. DT1152 / DT1151A-Ex ThermoRex With the ThermoRex heat detector four parameter sets are available: APS100T (Default) Rate-of-rise detector with static response temperature at 60°C. EN54-5 Class 1 (Class A 1 R according to prEN54-5 ed 2, draft 4, 1992) APS103T Maximum temperature detector, 60°C. (Class A 1 S according to prEN54-5 ed 2, draft 4, 1992) APS105T Rate-of-rise detector with static response temperature at 80°C.
4.1.7. Setting the parameters Parameter sets for Detector Microprocessor EEPROM Property Mask Algorithms (Computing formula) Spec. Test Smoke detectors APS005S APS100T 60°C Spec. Test Spec. Test Loaded parameter set (factory setting) Loaded parameter set (factory setting) APS006S APS103T Spec. Test Load other parameter sets and change the sub-sets by means of control unit and tool Heat detectors Spec. Test APS007S APS105T Spec. Test Tool 60°C 80°C Spec.
4.2. AnalogPLUS, settings The AnalogPLUS detectors have neither a mechanical nor electrical means of setting. Each AnalogPLUS detector can transmit 5 events to the control unit: Normal status (quiescent value) Danger signal „increased sensitivity” Danger signal „standard sensitivity” Drift „application warning” Impairment (Detector malfunction) All signals are processed in the control unit and evaluated according to programming.
5. Appendix 5.1. Description of the AlgoRex detection systems 5.1.1. DS115x Interactive Neural smoke detector DOT115x PolyRex Wide spectrum smoke detector DO115x OptoRex Heat detector DT115x ThermoRex This detector series offers the highest detection reliability with the lowest risk of being deceived by deceptive phenomena thanks to AlgoLogic, the evaluation and decision logic based on programmable algorithms. The detectors can be parameterized.
Typical phenomena Sensor signals Analysis, Interpretation & pattern comparison Result Signal strength %/m Rate of rise Optical sensor t Smoke density development Danger level Signal fluctuation Signal strength Diagnosis level °C Rate of rise Heat sensor t Temperature development Signal fluctuation Algorithms Fig. 1 Signal processing in the PolyRex neural smoke detector 20 Fire & Security Products Siemens Building Technologies Group e1225f 12.
5.1.2. DS113x AnalogPLUS Multi-sensor smoke detector DOT113x PolyRex Wide-spectrum smoke detector DO113x OptoRex Heat detector DT113x ThermoRex This detection system with addressable smoke and heat detectors has multi-stage, intelligent signal evaluation. AnalogPlus detectors detect reliably thanks to central sensitivity setting for specific detectors, alarm verification and multi-detector logic operations (multiverification).
5.1.3. DS110x Collective Wide-spectrum smoke detector DO110x OptoRex Heat detector DT110x ThermoRex This detection system consists of smoke and heat detectors using conventional limiting value detector technology. It is sophisticated and extremely reliable. The sensor signal is amplified and upon exceeding the alarm threshold the alarm is transmittted to the control unit. The signal is integrated in the control unit. The control unit registers only the line in which the detector in alarm is installed.
5.2. Test fires and classification of detectors according to EN54 The smoke detectors OptoRex and PolyRex comply with standard EN54-7. In interactive systems with basic parameter sets, in AnalogPlus system with ’Standard’ and ’Increased’ sensitivity setting. EN54 test fires prove that the detector has adequate sensitivity for a wide range of types of smoke as is required for general application in fire detection systems in buildings.
5.2.2. Classification of AlgoRex smoke detectors according to EN54 The following table shows the classification of smoke detectors in respect of the basic parameter sets or sensitivity.
5.4. Number and arrangement of point-type detectors 5.4.1. Number and arrangement of detectors The rule that the smoke must be able to reach the detector also applies to the AlgoRex system. Nothing has happened to change this basic principle Chapter 5 in the CRP planning guidelines e432.. therefore also applies to AlgoRex detectors. Checking ambient influences Detectors must not be exposed to impermissible ambient influences.
Other aspects to be taken into account: The corresponding fire phenomenon (smoke / heat / radiation) must be able to reach the detectors Foreseeable deceptive phenomena Foreseeable mechanical influences (vibration, etc.) Correct testing and replacement 5.4.2. Monitoring area per smoke detector The monitoring area (AM) is determined as a function of the room height and fire hazard.
5.4.3. Influence of room height The higher the room, the greater the distance between the seat of the fire and detector. Therefore, the weaker the influence of the fire phenomena to be detected. With increasing room height, in view of the greater room volume, an incipient fire can be larger without increasing the danger of rapid fire spread or flashover. Heat (Convection) Room height Smoke h3 Radiation h2 h1 Seat of the fire Fig.
open fire smouldering fire AM open fire smouldering fire AM> AM>> Small monitoring area because: Large monitoring area because: Very large monitoring area because: – Room height up to 3m – The detection of smaller incipient fires (both open and smouldering fires) is possible by means of smoke detectors on the ceiling.
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