Electro Detectors Wireless Fire Alarm Systems
Electro Detectors Ltd is located in offices and factory that were purposely built in the Essex, Harlow, they take great pride in the product design and high quality of our equipment, especially as it is all manufactured and designed right here in the UK.
Established in 1972 Electro Detectors produce and distribute the equipment through a dedicated network of fire alarm companies throughout the UK, who have advanced radio fire detection and alarm systems skills. Wireless fire alarm detection first came onto the market during the early 1980’s. During that time, countless National Trust and English Heritage buildings, in addition to dwellings that were owned privately, who were seriously looking for a replacement for traditionally hardwired fire alarms considering the difficulties as well as disruption in which this type of fire alarm would bring.
Fire Systems Ltd is an Electro Detectors Approved Premier Installer
Since 1988 Electro Detectors has been developing and manufacturing radio fire alarms, also commonly known as Wireless systems. They now have sales further a field into parts of Europe and Scandinavia. Electro Detectors have been attributed as been the first to bring to the market a radio sounder and also the first manufacturer to produce a mixed sounder/detector. Our radio systems are entirely intelligent/addressable which enables it to provide protection for just about every application, this could be from a small private residence to a much larger system in advance of 3000 devices.
Cellular phone technology throughout the last 10 years has produced massive advancements when it comes to radio technology. As a result, this has allowed Electro-Detectors to enhance their product range both in operation and design.
During 2005 they released the Zerio range . This unique modest 8 zone fire alarm panel was able to communicating with 99 devices and turned out to be very successful with the installers and end users, the zerio system offered an affordable alternative for the small sized installation. With the arrival of new European Products standard the (EN54-25) the Zerio radio system needed to be redeveloped and during June 2011 they released their newest Wireless fire alarm the Zerio Plus, as the name indicates this has many of the best functions within the Zerio System and quite a few of the latest features intended to satisfy the requirement of the latest standard. The Zerio Plus fire alarm is fully EN54 Certified,
Considering the all the advantages that radio has to offer – for example; negligible interruption as well as speedy installation time, the wire-free systems provide an the ideal alternative
When supplying a wireless fire alarm system, it should comply with the current Radio Standard for fire alarms EN54-25. This specification applies to Zerio Plus radio addressable fire alarm systems as designed, supplied and commissioned.
1.1 As a minimum, a Zerio Plus radio fire alarm system shall comprise of radio manual call points and/or radio fire detectors, control indicating equipment and wired or radio sounders. In addition, the Zerio Plus radio fire alarm system shall, where necessary, incorporate radio linked repeater panels and any necessary extra indicating and control equipment.
1.2 The function of the Zerio Plus radio fire alarm system shall be as follows:
to detect a fire in the protected area
to display alarms of fire and fault warnings on control panels and indicating equipment
III. where necessary, to automatically initiate a staff alarm
where necessary, to automatically initiate a general fire alarm
where necessary, to initiate the operation of fixed fire extinguishing systems
where necessary, to relay fault and alarm warning signals to remote locations.
1.3 The design and planning phases of the Zerio Plus radio fire alarm system shall be identical to that of a wired system but shall also include a detailed radio survey ensuring reliable transmissions between devices and panels.
1.4 The system shall be designed to comply with BS5839: part 1 and EN54
2.0 System Specification
2.1 Equipment used for radio signalling should be approved to EN specification EN300 220. The panel communications should use a frequency of suitable to meet the requirements of EN54 part 25. Where appropriate only single antennas should be connected to each panel.
2.2 The system shall be capable of accommodating up to 100 zones with 240 individually addressed devices.
2.3 The areas in question shall be protected in accordance with BS5839 Part 1, utilising the following equipment:-
optical smoke detectors
heat detectors (both rate of rise and fixed point detection types)
combined sounder and optical smoke detector
combined sounder and heat detector (both rate of rise and fixed point detection types)
callpoints/break glass units
input / output units
2.4 The system should be capable of transmitting fault and fire conditions to all display panels installed on the system and depending on the configuration operate the appropriate sounder zones.
3.0 Radio Control and Repeater Equipment
3.1 A control panels with up to 7 radio booster/repeater panels shall be installed on a single system.
3.1 The control panel should meet the requirements of EN54 Part 2. The panels internal power supply used to power the control panel and charge the internal battery should meet EN54 Part 4.
3.2 The control panel should be capable of indicating fire and fault conditions and actioning the event dependant on the system configuration.
3.3 Both control and repeater panels shall have, as standard, a 72 Hour standby power supply from a single 7Ahr battery.
3.4 The control panel shall display information for 240 devices in 20 zones using a 20 column by 4 lines with a LED backlit screen. This shall also be used to display a simple to use menu system.
3.5 There shall be a four level access system, two for users and two for engineers. Access to all control panel functions should be accessible via the password. Panel operations available once the correct password is selected shall be Sound Alarms, Silence (alarm and fault) , Reset and Function (if programmed to various options). Pressing the menu button shall prompt the user or engineer for a password. Five incorrect password attempts will disable the system. A coded backdoor entry password should be available from the manufacturer to enable entry into the system. Once used, this password should be changed to prevent further access, once the code is known.
3.6 The menu system shall be of a scroll bar variety.
3.7 A pager interface shall be fitted allowing messages to be transmitted to a handheld pager device using a UHF frequency if required.
3.8 A USB connection shall be included to allow the connection of a USB keyboard to be used for programming text configuration. This connection should also allow for the connection of a USB memory stick to record and analyse system information and configuration through a PC.
3.9 The control panel shall be capable of supporting analogue smoke and heat detectors. The sensitivity of devices should be adjusted from the control panel. A pre-alarm function should allow fault indication for early warning of a fire situation. Should a head become contaminated with dust a fault indication should be displayed on the control panel.
The control panel shall incorporate an in-built memory card which contains a complete copy of the panel configuration. This system uses this information to check for any corruption of data and also uses it to upgrade the panel processor.
Radio repeater panels shall only indicate power supply healthy and its own internal panel faults. Indication shall be given when the system is disabled by operation of test modes and engineering options.
The control panel shall incorporate the facility to wire remote intelligent wired antennas. This connection should also allow for the connection of remote displays.
3.12 All disabled options shall re-enable after a pre-determined time. (for example:-isolated devices and zones, test modes and menu systems)
3.13 There shall be an option for a 40 character printer to be fitted externally to the panel.
3.14 All communication shall utilise a frequency to meet with the requirements of EN54 Part 25. This frequency should be a narrow band FM transmission and use a suitable band reserved for alarm equipment. It should be capable of using 13 separate channels within this band. To eliminate communication clashing the system shall operate a fully hand-shaked time division multiplexed transmission protocol.
4.0 General Radio Devices
4.1 All devices shall be self contained radio units each containing a minimum of two individual battery sources.
The unit should store a unique code with 6 million differs which should be used to ensure the correct device is processed by the system.
Each device shall use an unique unit number to transmit to the control or booster panel which can be altered on site having a maximum value of 240.
A common battery pack should be used across the range of devices. This should be 2 x AA lithium cells to give the maximum reliability, performance and life.
4.3 Alarm signals should override fault signals.
4.4 Each device shall transmit a regular verification signal detailing the status of the device with any threshold values.
4.5 Each device shall incorporate a bi-colour LED to indicate the status of the device. Red indicates an alarm or fault, whilst green indicates a specific mode of operation.
4.6 All devices will transmit at a frequency that meets the requirements of EN54 Part 25. A suitable band should be used, which is reserved for alarm equipment only, and should be capable of using 13 separate channels within this band. The device should have an maximum output power of 10mW ERP. Modulation shall be narrow band FM with a deviation of +/- 1.5khz operating to the EN specification EN300 220.
4.7 All devices shall transmit a tamper fault when removed from its base.
4.8 All devices shall incorporate a reset function either by a push button or a magnetic switch.
4.9 All transmissions, except verify and low battery, will be transmitted immediately and repeatedly using a time division multiplexed protocol ensuring minimal signal clashing. The transmission pattern will exit once the fault or alarm condition has been removed. The low battery fault shall be included when the next verify signal is transmitted.
All messages transmitted shall include a sophisticated error detection protocol eliminating the decoding of corrupt transmissions.
Analogue detection devices shall transmit the level of smoke density or level of heat measured in the head on a regular basis. Intelligence should be incorporated into the device to allow early transmission of a pending fire condition.
5.0 Radio Smoke and Heat Detectors
5.1 Detectors shall comply with the relevant parts of EN 54 Part 5, Part 7 and Part 25 as appropriate.
5.2 Devices shall sample their head condition every four seconds. Should a fire condition be detected the head shall confirm the condition and transmit appropriate message.
5.3 Heat detectors shall be available as fixed point units programmable from the control panel from 50 to 75 o C in 1 o C intervals and rate of rise heat detectors programmable from the control panel to 3 settings (low, medium and high) with a 58 o C alarm threshold.
5.4 Smoke detectors shall operate using an optical principle. An option shall be available to alter the sensitivity of these to one of three (low, medium and high) settings.
5.5 Each smoke and heat detector shall be compatible with a single common base. Replacement of an incorrect unit will result in a fault condition.
5.6 Batteries for devices should be lithium with an operational life of up to 7 years. Once the batteries are approaching the end of their useful life a fault transmission should be made to the control panel indicating the condition. The unit shall then operate for a minimum of a further 30 days.
6.0 Radio Call Point / Break Glass / Transmitter Units
6.1 Manual call points shall comply with EN54 Part 11.
6.2 Radio call points should be powered by two independent lithium AA cells with a life expectancy of up to 7 years. Each battery should be independently monitored. Once the batteries are approaching their end life the control panel shall indicate the condition. The unit shall then operate for a further 30 days.
6.3 Each unit shall have the option of having a second input connected. The second input shall be fully monitored and capable of having its own unique device number, location text and cause and effect table
7.0 Radio Sounder / Activating Devices
7.1 Each sounder shall be capable of sounding 14 different tones as configured within the control panel.
7.2 The sound levels shall be adjustable between 85 and 105 dBA.
7.3 Each sounder or group of sounders shall be capable of being individually activated.
7.4 Each sounder shall have a facility to operate (or isolate) third party equipment in the event of a fire alarm. This facility should be programmable as to return to normal operation on either silence or reset of the alarm at the main control panel.
7.6 A hardwired 12V version of the sounder shall be available incorporating the same sounder tones and same enclosure.
7.7 Current and voltage monitoring circuitry shall be incorporated to ensure correct operation of the micro-processor. A watchdog system shall also be incorporated.
7.8 To improve communication an optional external antenna shall be able to be fitted.
7.9 Sounder batteries shall have a life expectancy of up to 3 years. Each sounder / activating devices should operate from 6 independent AA lithium cells. These cells should operate in-turn until its voltage approaches its minimum operating voltage upon which this battery will no longer be used and the remainder of the batteries are used to power the device. The device shall be capable of powering the unit for a further 30 days after the first battery is measured as low and still having the capacity to operate the sounder, in an alarm state, for a further thirty minutes.
7.10 Each sounder shall have the option of a further extension sounder connected to it.
7.11 Each radio sounder shall be capable of having a wired call point connected to it. The connection shall be monitored for both short circuit and open circuit conditions. The hardwired call point shall be capable of having its own unique device number and location text.
Radio Strobe units shall be available as either a stand-alone unit or as part of the device with the same operating parameters as for the radio sounder.
Output devices should be capable of switching either 230V mains power or 5 – 35V DC
8.0 Combined Radio Sounder and Detection Devices
The combined radio sounder and detection device shall be a self contained unit.
The detection element of the unit shall meet the same specification as outlined in section 5.
8.3 Each sounder shall be capable of sounding 14 different tones as configured within the control panel.
8.4 The sound levels shall be adjustable between 65 and 90 dBA.
8.5 Each sounder or group of sounders shall be capable of being individually activated.
8.6 Current and voltage monitoring circuitry shall be incorporated to ensure correct operation of the micro processor. A watchdog system shall also be incorporated.
8.7 To improve communication an optional external antenna shall be able to be fitted.
8.8 Combined sounder detector batteries shall have a life expectancy of up to 3 years. Each sounder devices should operate from 4 independent AA lithium cells. These cells should operate in-turn, until its voltage approaches its minimum operating voltage upon which this battery will no longer be used and the remainder of the batteries are used to power the device. The device shall be capable of powering the unit for a further 30 days after the first battery is measured as low and still having the capacity to operate the sounder, in an alarm state, for a further thirty minutes.