FIRE ALARM SYSTEM

Welcome to the World of Fire Detection and Alarm Systems, Designed, Supplied, Installed and Maintained by us. We deal with the world famous and quality & reliability proven manufacturers in U.S.A & U.K. Such as Edwards System Technology (EST – U.S.A), Mirtone International, Canada, Deetech – U.K, C – Tec Co., - U.K, Zeta – U.K and Secutron Inc, Canada.

DEVICES

Fire Alarm system provides earliest warning of the outbreak of Fire, in order to alarm both the occupants of a building and fire fighters. The initiating devices can be Smoke or Heat detectors, the manual pull stations or break glass, beam detectors, flame detectors (UV or IR), any interfaces like pressure, flow or tamper switches or gas detectors. The output alarm devices can be bell, horn, siren, strobe, door holder, speaker VDU (CRT or LCD), remote annunciator, printer or any of such kind. Graphic annunciator if used will help to find the place of accident of fire very fast, as it employs a graphic (layout drawing) display.

INTERFACING WITH OTHER UTILITIES

A building may have some systems need to be connected with fire alarm system. They are AHU's Lift / elevator, pressure fan and supply Fan, fire check doors or smoke escape fans exhaust fans. All these may be connected individually or as a group to BMS. BMS (Building) Management System) shall be interfaced with our Fire Alarm System.

SYSTEM AND BASIC OPERATION

Fire Alarm System shall be either conventional or analogue addressable type. JOFFCO deals both upon the client's requirements. Conventional System has zonewise annunciation to locate the affected Zone / Area. A group of Detectors are made into a Zone and connected to the Main Fire Alarm control Panel through detector line dedicated for this purpose. As a typical example, the maximum number of detectors that can be connected to one Detector line (Zone) shall be considered as 20 Numbers. If the quantity of the detectors are more than 20, a control panel of more than one zone has to be selected. In some case, as per the site conditions, a multizone control panel may be selected even with the less numbers (less than 20) of detectors.

Minimum requirements for a control Panel are:

• >> Zonewise Alarm indicators (audio / visual).
• >> Common fire Indicator.
• >> Common fault indicator.
• >> Reset Switch.
• >> Alarm / trouble silence switch.
• >> Drill / Test Switch.
• >> Zone Isolator Switch.
• >> Zonewise / Common Notification appliance circuit output ( NAC).
• >> Battery Backup other than Main Power.
• >> Common Fire Dry Contacts.
• >> Common Fault Dry Contacts.
• >> Aux 24 VDC ( Optional).
• >> Release Module ( RMOD) ( Optional).
• >> City Tie Module ( Optional).

Initiating Device circuit/s cause alarm in the panel considered as INPUT. Panel then switch on the OUTPUT Circuits and relays to raise an alarm. These alarm sounders / strobes shall be silenced by Alarm silence switch. If the cause for the alarm restores to normal. " RESET" the panel to bring back to "NORMAL", "DRILL" SWITCH is used to test the output devices whenever required. Sounders / strobes may be inhibited during the drill, not alarm the public during testing as auxiliary 24VDC Supply shall be used for 4 wire detectors which need additional power than detector line. RMOD shall be used for gas release or fire protection valve controls. City tie module is for external annunciation through telephone.

ANALOGUE ADDRESSABLE CONTROL PANEL Addressable fire alarm panels, as of its unique features are widely used nowadays.

Its advantages are:

• 1. Pinpoint information of the devices.
• 2. Paging facility (call all / individual).
• 3. History report through its LCD / VDU.
• 4. Easy access for Fire fighting and maintenance.
• 5.Using command menus, you can make your system work to your shopisticated requirements.
• 6. User friendly.
• 7. Two way communications through built in telephones.
• 8. Interfacing with any non-addressable devices using the proposed modules.

Addressable detectors and Modular execute the main jobs in this system. Each device / module has its own label (command or number) which can be called for operation in the programmed way. A printer if connected will give a print out report for logging. Graphic displays if any will give a picture of the area.