Integration of FM200 Systems

In document Fire Protection Piping Installation and Testing-Feb. 12, 2014 (Page 63-72)

After 10 minutes, check the pressure gauge

11.4.12.9 Integration of FM200 Systems

 FM200 Fire Suppression Systems, when installed to protect electrical/electronic hazards or high value assets, will be fully effective if and only if the system is integrated with other essential services in the building like HVAC System, Main Fire Alarm Systems, BMS Systems, Emergency Power Shut Off for vital electrical equipments, etc.,.

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 Also, the room has to be completely sealed so that FM200 discharged will not escape. Escaping any

amount of FM200 agent will result a lower concentration which would be considerable especially FM200

concentration for the room is a minimum as 7% volume by volume.

 7.7.2.3* Review of Enclosure Integrity – all total flooding systems shall have the enclosure examined and tested to locate and effectively seal any significant air leaks that could result in a failure of the enclosure to hold the specific agent concentration level for the specified holding period. Quantitative results shall be obtained and recorded to indicate that the specified agent concentration for the specified duration of protection is in compliance with Section 5.6, using an approved blower fan unit or other means as approved by the authority having jurisdiction.

 HVAC Systems should be turned off prior to the gas discharge and also any openings related with HVAC Systems are to be closed to assure a complete sealing of the room.

 Any openings of the duct to the room in fresh air or return ducts are to be closed completely by a motorized fire damper. Most of the motorized fire dampers are of spring return actuator type (fail safe).

The actuator of the damper will get a signal from the pre-discharge (2nd Stage) relay and then will close the damper to ensure the total sealing of the room.

 Wall mounted Motorized Damper for opening of duct on wall - examined and tested to locate and then effectively seal any significant air leaks that could result in a failure of the enclosure to hold the specified agent concentration level for the specified holding period.

Quantitative results shall be obtained and recorded to indicate that the specified agent concentration for the specified duration of protection is in compliance with Section 5.6, using an approved blower fan unit or other means as approved by the authority having jurisdiction.

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 Motorized Fire Damper is to be provided on the duct opening to close the damper prior to the system discharge. Actuator will be connected with FM200 Control Panel to get the actuation relay contact (pre-discharge state).

 Pre-discharge relay will be connected to the damper (if it is a failsafe or spring return actuator) to close prior to discharge. Damper can be reset after the hold time after discharge and after the FM200 system is reset.

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 Multi-opening of HVAC Duct – for multiple openings, it would be better duct just outside the room or inside the room so that the multiple dampers can be avoided.

For that purpose, In-Line Motorized Fire Damper can be utilized.

 If, for any reason, the in-line damper can be installed only far from the room, then the volume of the ducting till the damper will have to be added to the room volume for calculation of FM200 agent.

 Pre-Discharge Relay will be connected to the Damper (if it is a failsafe or spring return actuator) to close prior to discharge. Damper can be reset after the hold time after discharge and after the FM200 system is reset.

 Sealing the Hazard – Enclosure – as per NFPA 2001, the room or the hazard to be protected by FM200 system should be properly sealed in order to hold the FM200 agent discharged into the room for the specific hold time. This document analyzes different scenarios of sealing the hazard.

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 Sealing Void: (Rooms with false ceiling) – unless specified, ceiling void normally contains lighting circuits and HVAC ducts. They don’t need to be protected by FM200 generally. Ceiling void can be sealed properly and isolated from the room protected by FM200. For that purpose, false ceiling should be made of fire rated air tight materials. Ceiling tiles (perforated or non-perforated) cannot be considered to fall in this category. When the ceiling void cannot be isolated comply from the room, theceiling void should be protected bey FM200 system. But, in this case, it is to be made sure that the walls are to be extended to the ceiling slab so that the complete isolation of the room with ceiling void is obtained from other rooms.

 Raised Floor – are normally installed in the control rooms, computer rooms, server rooms, UPS rooms, Data rooms, Telephone rooms, etc., for running the data cables. In this case, floor voids are considered as electronic hazards and are to be protected by FM200 systems.

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 Doors – normally, it is found that the doors will have a gap and this would result the scape of FM200 agent through the gap. Such gaps are to be closed by

approved fire sealant. Sealants can be provided either with door or with the frame. Sealants will be flexible and ensure a complete tightness when the door is closed.

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 Door with Louvers – there are certain doors with louvers existing. In this case, Motorized Fire Dampers or Fire Shutters will have to be provided on the louvers to close the opening prior to FM200 discharge.

Motorized Fire Damper is to be provided on the louver opening to close the damper prior to the system discharge. Actuator will be connected with FM200 Control panel to get the actuation relay contacts (pre-discharge state). Pre-Discharge Relay will be

connected to the damper (if it is a failsafe or spring return actuator) to close prior to discharge. Damper can be reset after the hold time after discharge and after the FM200 system is reset.

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 Cable Trenches – cable trenches are to be protected by FM200 system if they are not able to isolate from the room. The isolation should be by means of air tight cover plates, sealant foams in a cable entries and fire sealants in any other gaps of the cover plates.

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11.4.12.10 Interface

 FM200 systems will have to be monitored by the Main Fire Alarm Systems for Alarm, Gas release and Trouble, unless specified otherwise.

 FM200 Systems are preferred to be monitored by the BMS systems as well for Alarm and Trouble unless specified otherwise.

 Smoke detection within the hazard area shall be provided by grid of alternating photoelectric smoke detectors. Activation of any detector in the grid shall activate the “Grid Detector” functions described below.

Activation of a detector other than of the grid, shall start the “Confirmation sequence” below.

 All automatic extinguishing agent release shall be through dedicated extinguishing (FSCP) control panels listed for the purpose and not directly by FAS.

However, FAS shall monitor the extinguishing system for alarm and trouble.

 Upon operation of the “Grid Detector” associated with the protected area, the system shall:

o Activate a positive fire alarm sequence.

o Release fire / smoke dampers.

o Shutdown HVAC System supplying protected area.

 Upon confirmation of the Alarm by a “second detector (not part of the grid)”, the system shall:

o Activate fire alarm system Stage 2.

 Upon activation of the manual release station the system shall:

o Activate fire alarm system Stage 2.

o Release fire / smoke dampers.

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o Shutdown HVAC System supplying protected area.

In document Fire Protection Piping Installation and Testing-Feb. 12, 2014 (Page 63-72)