Fire blanket shall be made from textures woven glass fibre, impregnated both sides with a special high temperature resistant silicon rubber. The fire blanket shall have an approximate finished weight of 565 gm/m2, and shall conform to BS 6575. The blankets shall be packed in white rigid self-extinguishing PVC container, with instantaneous release tape to function as handle when the blanket is pulled for the container.
End of Section
SECTION 15600
FIRE DETECTION & ALARM SYSTEM
Section 15600 FIRE DETECTION AND ALARM SYSTEMS
15600.1.1 General
Fire Detection and Alarm Systems shall be installed in accordance with BS 5839 Part 1 : 1980 “The Installation and Servicing of Electrical Fire Alarm Systems”, and BS 5444-P Part 5.
The Contractor shall supply, install and commission the complete Fire Detection and Alarm System including manual and automatic fire detectors, alarm sounders and control and indication equipment as detailed for each building and when complete the Contractor shall arrange for tests at his expense to satisfy the Civil Defence Authority, the Client and the engineer that the system is operating correctly.
The system shall be composed of a soft addressable system with latest technology in the field to achieve maximum facilities in identifying the spot of fire outbreak and with minimum annunciation of false fire phenomena.
All the system components such as Control Panel, Detectors, Manual Push buttons, Sounders etc., shall be produced by the same manufacturer who has at least five (5) years experience in Design, Manufacturing, Installation, Commissioning and Maintenance of fire Alarm System.
The Fire Alarm Contractor shall be registered in the approval list of Local Authorities approving the system.
15600.1.2 Design Criteria
1) The system shall comply with BS 5839, Part 1 except where this is in conflict with the specification.
2) The system shall include : i) Fire Alarm Control Panel
ii) Ionisation/Optical type smoke detectors iii) Rate of Rise heat detectors
iv) Manual , break glass push buttons v) Electronic sounders and alarm horn
3) The fire alarm enunciators shall be fixed in the building in a position indicated by Local Authorities.
4) Once an alarm is initiated it shall continue until normal conditions are restored.
5) Manually operated silencing devices shall allow transfer of the alarm to a control sounder.
6) The operation of a silencing device shall not cancel the usual indication etc.
7) The system shall be suitable for operation on 24V supply and shall be complete with all necessary batteries, battery chargers and the like.
8) All materials, equipment and accessories for detection and alarm system shall be obtained from a single supplier and shall meet the approval of Local Authorities.
Contractor submit complete list of materials and equipment of fire Alarm and Detection
System for Engineer’s approval.
The Contractor shall provide five copies of a manual giving complete instructions for the operation, inspection, testing and maintenance of the system including wiring diagrams of units and main control panel. It shall also include the following.
1) Manufacturer’s instructions for testing and frequency of cleaning for automatic smoke detector heads.
2) Manufacturer’s instructions for any control adjustment and maintenance of battery/charger units.
15600.1.3 As-Built Drawings
Upon completion of the installation and prior to final inspection, the Contractor shall provide “As Built” drawings. Where detectors are used, the “As Built” drawings shall show the number and the exact sequence in which the detectors are installed on the circuit. Contractor shall submit for Engineer’s approval, reports and production and field tests.
15600.1.4 Maintenance and Service
a) Provide maintenance and call back service for two (2) years following final acceptance date of the fire alarm and detection works.
b) Maintenance shall include the visit of Contractor’s competent personnel to site, necessary adjustment, cleaning and replacement of parts.
15600.1.5 Spare Parts
a) The contractor shall list the spare parts required for a period of two years with prices.
b) Provide two complete sets of special tools necessary for the routine maintenance and testing of the complete Fire Alarm System.
15600.1.6 Product Delivery
a) Do not store equipment outside exposed to atmosphere.
b) Physically protect all equipment and materials against damage from any other trades.
15600.1.7 Training
The Contractor shall organize training courses on the maintenance of the Fire Alarm System for the personnel designated by the employer.
15600.2 System Description
a) Provide a complete high quality fire alarm and detection system composed of fully electronic hardware to achieve maximum facilities in identifying the source of fire outbreak in its very early stages and minimize unwanted false alarm.
b) The System shall include but not limited to the following :-
1) Addressable Main Fire Alarm Control Panel with Analogue Detection Technique with integral battery and charger, in built keyboard (function keys).
2) Addressable Manual call Points 3) Addressable Fire sensors
4) Addressable Electronic Sounders and Alarm Horn 5) Fire Alarm Interface units
6) Other accessories required for wiring 7) Auxiliary components
15600.2.1 System Hardware Construction
15600.2.1.1 Main Fire Alarm Control Panel
1) The Soft addressable fire alarm control panel with analogue detection technique shall have the following features:
i) Panel shall be multi-tasking micro computer controlled.
ii) Self contained and wall mountable.
iii) Integral switch mode power supply and battery charger.
iv) 24 hour battery back-up.
v) Twin 24 hour master alarm circuit.
vi) Twin auxiliary relays configurable for fire fault and or warning operations.
2) Control panel shall be fully electronic of modular design based on logic circuitry by microprocessor to allow programmed control and operation. The panel shall have alarm acknowledgement, reset, Day/Night organization and program operating controls as well as indications for all identified alarms, troubles, and display of alarm staging duration. The whole equipment of the panel with emergency power batteries shall be housed in the same housing, any alarm signal shall have an automatic priority over any trouble signal received in the control panel , i.e., alarm signals shall over-ride the trouble information. Upon resetting the alarm, the trouble signal will appear again until repair is completed.
3) The control panel shall be able to handle up to 6 addressable loops, with extension panels available as required.
4) No address shall be set neither on the detector nor in the detector base. All detectors and base electronics shall be identical. The base electronics shall be fixed and all assignments of zones and positions shall be programmed at the control panel.
5) All detection and alarm lines shall start and end in the main fire alarm control panel.
6) Single fibre optic cable and multiple fire counts shall be used for linking fire detection/alarm system.
7) Control Panel shall have the following indications
(i) Alphanumeric liquid crystal display for fire, fault and warning messages. Display shall be in 4 lines with 40 characters per line.
(ii) Back light facility on liquid crystal display.
Two tone buzzer for fire/fault.
(iii) Audible bleep for keyboard pres confirmation.
(iv) Modules for light emitting diodes :
Red - Fire
Green - Power on
Yellow - Warning and Fault
8) Fire Monitoring
i) Fire events shall be detected at the fire alarm control panel and shall provide a visual indication with the illumination of the red light emitting diode module marked ‘FIRE’ complemented with messages on the LCD. In addition, event messages shall be printed simultaneously upon occurrence of each event. An audible indication shall also be given by a non-cancellable low tone fire buzzer, which shall be automatically operated by the control panel
together with the external Master Alarm circuits. All fire events shall be given a high priority for display, indication and control at the panel, with fault, warning and other status events registered during a fire condition, however their indications shall be inhibited until the fire condition is reset.
ii) The control panel shall be interrupted by any detection element on its loop holding Fire or Fault threshold. The panel shall immediately perform a fast scan to locate the de vice requesting attention and when it is located, data bits shall be taken from it and used in conjunction with background readings to analyse the event.
The background readings of each analogue channel on any device shall be taken at 1.3 minutes intervals to create a table of slow
‘Running Time Average’.
A slow drift of analogue channel readings from a sensor requiring maintenance shall be reflected by changes to the time average values, allowing alarm level off-set values to be created for event analysis, maintaining the sensors sensitivity and allowing the early detection of slow burning fires.
9) FAULT AND WARNING MONITORING
i) Fault event
All fault events shall be automatically detected at the fire alarm control panel giving visual indications by the illumination of the yellow light emitting diode module marked ‘FAULT’, complemented with messages on the display giving details of each event occurrence. An audible indication shall also be given with the operation of a cancelable high tone fault buzzer from within the control panel.
ii) Warning event
A warning shall be given when the disabling facilities of the control panel is automatically or manually operated. The automatic disabling operation shall be activated by the time zone facilities, which shall disable detection elements over a pre-programmed time period to prevent inadvertent alarms being raised. The manual disabling operation shall be activated only by personnel carrying out commissioning, service or maintenance.
Warning events shall be automatically shown at the control panel giving visual indications by the illumination of a yellow light emitting diode module marked ‘WARNING’ and shall be complemented with messages on the liquid crystal display giving details of each event occurrence.
iii) All Fault and Warning events shall be immediately logged as originally displayed. They shall also be printed at the printer using information retrieval facilities or simultaneously upon occurrence of each event. The details of each event shall include information on the type of event, its time and date of occurrence with other relevant data such as card slot number,
detection element number, channel number or zone number depending upon the origin of the event. The visual and current log information shall be automatically cancelled when the condition is removed.
10) USER CONTROLS
i) All controls shall be behind a lockable cover.
ii) Essential controls for fire and evacuate - Start Sounders
- Stop Sounders - Reset.
iii) Silence fault buzzer facility iv) Tune and date setting facility
v) Master Alarm START/STOP Controls
vi) Liquid crystal display, light emitting diodes and fault buzzer test.
vii) Printer ON, OFF, Line Feed and Test facilities.
viii) Disabling facilities for
- Fire sensors and manual call points - Zones
i) System shall comprise of loop wiring with a loop length of maximum 1km if required.
ii) Addressable sensors, addressable manual call points, remote LEDs, addressable electronic sounders, repeat panels and interface units shall be on the same loop.
iii) Soft addressing i.e., automatic allocation of addresses to detection elements shall be done once they are installed thus eliminating the need for setting address switches at each such elements.
iv) 32 character label per each detection element shall be provided.
v) Sub-looping and spurring off facility from the main loop shall be available.
vi) Each and every detection element shall have a loop breaker relay to maintain its integrity and keep the entire loop functional isolating only the particular faulty element. A single short or open circuit fault on a loop wiring shall not disable any detection element on it and the system shall remain fully functional.
2. System Monitoring
Loop communication shall be monitored for :- - errors including communication errors - short circuit with response time of 0.5 second - open circuit every 10 seconds or less
- disconnection of detection elements from loop every 10 seconds or less
- supply - fault