USACE / NAVFAC / AFCESA / NASA UFGS-21 21 01.00 20 (April 2006)
------------------------------
Preparing Activity: NAVFAC Replacing without change
UFGS-13961N (September 1999)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 21 21 01.00 20
CARBON DIOXIDE FIRE EXTINGUISHING (HIGH PRESSURE)
04/06
NOTE: This guide specification covers the requirements for high-pressure carbon
dioxide fire extinguishing systems for protection of data processing equipment
and similar electronics occupancies?.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
NOTE: System requirements must conform to Unified Facilities Criteria (UFC)
3-600-01 Design: Fire Protection Engineering for Facilities and NFPA 12, "Carbon
Dioxide Extinguishing Systems."
NOTE: With minor changes, this guide specification can be adapted to other
occupancies or needs, such as the protection of electric generators. Total
flooding carbon dioxide systems shall not be installed in normally occupied
spaces. In other spaces, consideration must be given to the possibility that
personnel could be trapped in an atmosphere made by the discharge of carbon
dioxide. Lockout keyed switches or audible pre-discharge signals shall be provided.
Provide a sufficient time delay to allow for evacuation under worst case conditions.
Refer to safety cautions in NFPA 12. If there are questions concerning system
design, the Engineering Field Division, Naval Facilities Engineering Command,
Fire Protection Engineer, should be consulted.
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[ASME INTERNATIONAL (ASME)ASME B16.11(2005) Forged Fittings, Socket-Welding and ThreadedASME B16.3(2006) Malleable Iron Threaded Fittings, Classes 150 and 300ASME B16.39(1998; R 2006) Standard for Malleable Iron Threaded Pipe Unions; Classes 150, 250, and 300][ASTM INTERNATIONAL (ASTM)ASTM A 106/A 106M(2008) Standard Specification for Seamless Carbon Steel Pipe for High-Temperature ServiceASTM A 53/A 53M(2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless][FM GLOBAL (FM)FM P7825(2005) Approval Guide][MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY (MSS)MSS SP-58(2002) Standard for Pipe Hangers and Supports - Materials, Design and ManufactureMSS SP-69(2003; R 2004) Standard for Pipe Hangers and Supports - Selection and Application][NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 12(2007) Standard on Carbon Dioxide Extinguishing SystemsNFPA 70(2007; AMD 1 2008) National Electrical Code - 2008 EditionNFPA 72(2006) National Fire Alarm CodeNFPA 75(2008) Protection of Information Technology EquipmentNFPA 90A(2008) Standard for the Installation of Air Conditioning and Ventilating Systems][UNDERWRITERS LABORATORIES (UL)UL Fire Prot Dir(2008) Fire Protection Equipment Directory]1.2 DEFINITION
a. Year 2000 compliant - means computer controlled facility components that accurately process
date and time data (including, but not limited to, calculating, comparing, and sequencing) from,
into, and between the twentieth and twenty-first centuries, and the years 1999 and 2000 and
leap year calculations.
1.3 SYSTEM DESCRIPTION
NOTE: Identify the rooms, spaces, or areas, as appropriate, which are to be
protected by each type of system. If the volume of the space under raised floors
does not exceed 56.60 cubic meters 2000 cubic feet, total flooding system is
not required.
Design and provide [new and modify existing] high-pressure carbon dioxide [hose reel fire extinguishing systems
for protection of [_____]] [and] [underfloor total flooding fire extinguishing systems for spaces under raised
floors] for protection of [_____]. The system design and manufacturer's products including design, materials,
fabrication, assembly, erection, examination, inspection, and testing shall be in strict accordance with the
required and advisory provisions of NFPA 12, [NFPA 70,] [NFPA 72,] [NFPA 75,] [and] [NFPA 90A,] except as modified
herein. Each system [shall be designed for earthquakes and] shall include all materials, accessories, and equipment
inside and outside the building to provide each system complete and ready for use. Design and provide piping
layout of each system to give full consideration to blind spaces, piping, electrical equipment, ductwork, and
other construction and equipment in accordance with detail working drawings to be submitted for approval. Devices
and equipment for fire protection service shall be listed in UL Fire Prot Dir or approved by FM P7825 for use
in carbon dioxide fire extinguishing systems.
1.3.1 Detail Drawings
Prepare A1 841 x 594 mm 24 by 36 inch detail working drawings of carbon dioxide piping layout in accordance with
NFPA 12 "Working Drawings (Plans)." Show data essential for proper installation of each system. Show details
plan view, elevations, and sections of the systems supply and piping. Show piping schematic of systems supply,
devices, valves, pipe, and fittings. Show point-to-point electrical wiring diagrams.
1.3.2 System Calculations
Submit calculations showing that open-area smoke detectors calculationscomply with specified power consumption
limitation requirements.
1.3.3 As-Built Drawings of Each System
After completion, but before final acceptance of the work, submit a complete set of as-built working drawings
of each system for record purposes. Submit A1 841 x 594 mm 24 by 36 inches reproducible mylar film with title
block similar to full-size contract drawings. Furnish the as-built (record) working drawings in addition to
the as-built contract drawings required by Division 1, "General Requirements."
1.4 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] The following shall
be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
[The [_____] Division, Naval Facilities Engineering Command, Fire Protection Engineer, will review and approve
all submittals in this section requiring Government approval.]
NOTE: For projects administered by the Pacific Division, Naval Facilities Engineering
Command, use the optional "SUBMITTALS" article immediately below and delete
the general "SUBMITTALS" article above.
[The [_____] Division, Naval Facilities Engineering Command, Fire Protection Engineer delegates the authority
to the Quality Control (QC) Representative's U.S. Registered Fire Protection Engineer for review and approval
of submittals required by this section. Submit to the [_____] Division, Naval Facilities Engineering Command,
Fire Protection Engineer one set of all approved submittals and drawings immediately after approval but no more
later than 15 working days prior to final inspection.]
SD-02 Shop Drawings
Piping layout[; G][; G, [_____]]
Electrical wiring diagrams[; G][; G, [_____]]
SD-03 Product Data
Storage cylinders[; G][; G, [_____]]
Discharge head[; G][; G, [_____]]
Manifolds[; G][; G, [_____]]
Discharge alarm[; G][; G, [_____]]
Pipe and fittings[; G][; G, [_____]]
Pipe hangers and supports[; G][; G, [_____]]
Actuating stations[; G][; G, [_____]]
Pressure switch[; G][; G, [_____]]
Control panel[; G][; G, [_____]]
Smoke detectors[; G][; G, [_____]]
Heat activated detectors[; G][; G, [_____]]
Alarm horns[; G][; G, [_____]]
Alarm bells[; G][; G, [_____]]
[Audio] Visual alarms[; G][; G, [_____]]
Dampers[; G][; G, [_____]]
Main and reserve switch[; G][; G, [_____]]
Warning signs[; G][; G, [_____]]
Storage batteries[; G][; G, [_____]]
Battery charger[; G][; G, [_____]]
Annotate descriptive data to show the specific model, type, and size of each item.
SD-05 Design Data
System calculations[; G][; G, [_____]]
Calculations substantiating battery capacity[; G][; G, [_____]]
Open-area smoke detectors calculations[; G][; G, [_____]]
SD-06 Test Reports
Preliminary tests on piping systems[; G][; G, [_____]]
Submit certificates for preliminary test on piping systems.
SD-07 Certificates
Qualifications of installer[; G][; G, [_____]]
SD-10 Operation and Maintenance Data
Discharge head, Data Package 3[; G][; G, [_____]]
Control panel, Data Package 3[; G][; G, [_____]]
Submit in accordance with Section 01 78 23 OPERATION AND MAINTENANCE DATA.
SD-11 Closeout Submittals
As-built drawings of each system[; G][; G, [_____]]
1.5 QUALITY ASSURANCE
1.5.1 Qualifications of Installer
Prior to installation, submit data showing that the Contractor has successfully installed high-pressure carbon
dioxide fire extinguishing systems of the same type and design as specified herein, or that Contractor has a
firm contractual agreement with a subcontractor having such required experience. The data shall include the
names and locations of at least two installations where the Contractor, or the subcontractor referred to above,
has installed such systems. Indicate the type and design of each system and certify that each system has performed
satisfactorily for not less than 18 months.
NOTE: For projects administered by the Pacific Division, Naval Facilities Engineering
Command, include the following optional paragraph requiring the minimum qualification
of a NICET Level-III technician for preparation of all fire protection system
drawings.
[Qualifications of System Technician: Installation drawings, shop drawing and as-built drawings shall be prepared,
by or under the supervision of, an individual who is experienced with the types of works specified herein, and
is currently certified by the National Institute for Certification in Engineering Technologies (NICET) as an
engineering technician with minimum Level-III certification in Special Hazard System program. Contractor shall
submit data for approval showing the name and certification of all involved individuals with such qualifications
at or prior to submittal of drawings.]
1.6 SPARE PARTS
Furnish the following spare parts:
a. Two of each type detector installed.
b. One of each type of audible and visual alarm device installed.
c. Two of each type of fuse required by the system.
d. Five complete sets of system keys.
1.7 ELECTRICAL WORK
Provide electrical work associated with this section under Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM, except
for control [and fire alarm] wiring. [Provide fire alarm system under Section 28 31 74.00 20 INTERIOR FIRE ALARM
SYSTEM.] Provide control [and fire alarm] wiring[, including connections to fire alarm systems,] under this
section in accordance with NFPA 70. Provide wiring in rigid metal conduit or intermediate metal conduit, except
electrical metallic tubing conduit may be provided in dry locations not enclosed in concrete or where not subject
to mechanical damage.
PART 2 PRODUCTS
2.1 DESIGN OF CARBON DIOXIDE FIRE EXTINGUISHING SYSTEMS
NFPA 12, except as modified herein.
2.1.1 Underfloor Total Flooding Systems
Provide uniform discharge to each raised floor space to achieve a factor of one pound of carbon dioxide for each
[0.28 cubic meters10 cubic feet of underfloor volume in one minute for underfloor volumes of 56.6 cubic meters
2000 cubic feet or less] [and] [0.34 cubic meter12 cubic feet of underfloor volume in one minute for underfloor
volumes greater than 56.6 cubic meters 2000 cubic feet, except that minimum supply of carbon dioxide shall be
91 kg 200 pounds].
2.1.2 Underfloor Total Flooding Systems Supply
NOTE: Designer must ensure that no suffocation hazard will exist in any rooms
with underfloor total flooding systems or within any space to which the carbon
dioxide might migrate after discharge. Check with Fire Protection Engineer
if in doubt.
NOTE: When a single total flooding underfloor supply is to protect more than
one underfloor zone, clearly indicate the requirements on the drawings.
Supply shall include high-pressure storage cylinders, racks, manifolds, beam scales, and associated equipment.
Supply shall consist of carbon dioxide in [_____] [34 kg] [75 pound] cylinders. Arrange the first [_____] cylinders
for discharge upon activation of the main control, and the remaining [_____] cylinders for discharge upon activation
of the reserve control.
2.2 PIPE AND FITTINGS
2.2.1 Pipe
Threaded end connections, Schedule 80 or Weight Class XS (Extra Strong), except that sizes smaller than one inch
may be Schedule 40 or Weight Class STD (Standard).
a. ASTM A 53/A 53M, Type E (electric-resistance welded, Grade A or Grade B) or Type S (seamless,
Grade A or Grade B).
b. ASTM A 106/A 106M, Grade A or Grade B.
2.2.2 Threaded Fittings
ASME B16.11, except sizes 50 mm 2 inches and smaller may conform to ASME B16.3, Class 300.
2.2.3 Unions
ASME B16.39, Class 300.
2.3 PIPING ACCESSORIES
2.3.1 Escutcheon Plates
Provide split hinge metal plates for piping entering floors, walls, and ceilings in exposed spaces. Provide
polished stainless steel plates or chromium plated finish on copper alloy plates in finished spaces. Provide
paint finish on metal plates in unfinished spaces.
2.3.2 Pipe Sleeves
Provide where piping passes entirely through walls, ceilings, roofs, and floors. Provide sleeves of sufficient
length to pass through entire thickness of walls, ceilings, roofs, and floors. Provide 25 mm one inch minimum
clearance between exterior of piping and interior of sleeve or core-drilled hole. Firmly pack space with mineral
wool insulation and seal both ends of sleeve or core-drilled hole with plastic waterproof cement which will dry
to a firm but pliable mass, or provide mechanically adjustable segmented elastomeric seal. In fire walls and
fire floors, seal both ends of sleeves or core-drilled holes with UL listed fill, void, or cavity material.
a. Sleeves in Masonry and Concrete: Provide hot-dipped galvanized steel, ductile-iron, or
cast iron sleeves at walls, ceilings, roofs, and floors. Core-drilling of masonry and concrete
may be provided in lieu of sleeves provided that cavities in the core-drilled holes are completely
grouted smooth.
b. Sleeves in Other Than Masonry and Concrete: Provide 26 gage galvanized steel sheets.
2.3.3 Pipe Hangers and Supports
Provide MSS SP-58 and MSS SP-69, Type 1, with adjustable type support rods, except as specified or indicated
otherwise. Attach to steel joists with Type 19 or 23 clamps and retaining straps. Attach to steel W or S beams
with Type 21, 28, 29, or 30 clamps. Attach to steel angles and vertical web steel channels with Type 20 clamp
with beam clamp channel adapter. Attach to horizontal web steel channel and wood with drilled hole on centerline
and double nut and washer. Attach to concrete with Type 18 insert or drilled expansion anchor.
2.4 PRESSURE RELIEF DEVICE
Provide each system with an approved device designed to operate between 16.50 and 20.70 MPa (gage) 2400 and 3000
psig. Locate the device between the storage cylinder manifolds and normally closed valves.
2.5 SYSTEM CONTROL
Provide apparatus, accessories, components, and associated materials specified or required. Provide [automatic]
[and] [manual] [combination] [electric] [and] [pneumatic] [mechanical pull cable] type of actuating stations
complete and ready for operation. For electrically actuated systems, provide main and reserve switch. Switch
will select between main and reserve carbon dioxide supplies, located adjacent to the cylinder bank or at the
control panel. [Detection system shall be complete Class A electrically supervised, combination, automatic,
and manual. Automatic automation shall be accomplished by [smoke] [and] [heat] detectors.]
2.5.1 Manual Control Station for Underfloor Total Flooding System
NOTE: Omit if total flooding system for underfloor areas is not to be provided.
[Provide stations [at the principal exits from each protected space] [_____].] For systems that are mechanically
or pneumatically activated, provide a separate station for main supply and for reserve supply of carbon dioxide
at each location. For electrically activated systems, provide one station at each location. Mark each station
to indicate its function.
2.5.2 Sequence of Operation
Smoke detection system shall be [cross-zoned,] [priority matrix,] [or have common circuit individual detector
verification capability]. [If a cross-zoned system is used, each protected area shall contain two smoke detection
circuits (zones), with each circuit having an equal number of detectors connected thereto and no two adjacent
detectors connected to the same zone.] Upon activation of any smoke detector, the system shall simultaneously
activate pre-discharge alarms in the protected areas, signal the building fire alarm control panels to activate
the building fire evacuation alarms, and send a signal to the base fire department via the base fire alarm system.
Upon activation of a second detector (on the opposite zone of a cross-zoned system), the systems shall immediately
shut down [computer] [_____] equipment and air conditioning power, close fire dampers [and fire doors], activate
the discharge alarms, and initiate an adjustable zero to 60 second discharge time delay. At the end of the time
delay, [computer power shall shut down,] [and] carbon dioxide shall discharge into the protected area [and post
discharge visual alarms shall activate].
a. Upon activation by a manual station, the system shall immediately perform the above listed
alarm functions and shutdown functions, and initiate the adjustable time delay. At the end
of the delay, carbon dioxide shall discharge into the protected area.
[b. Upon manual activation of the inhibit switch, time delay countdown, equipment shutdown,
and agent discharge shall be delayed. All other functions shall continue unimpeded. Upon release
of inhibit switch, shutdown and discharge functions shall resume. Time delay shall not reset
and shall resume countdown to discharge after release of switch.]
[c. Activation of the manual discharge lever on the cylinder master discharge head shall cause
immediate agent discharge and immediate operation of all alarm and shutdown functions specified
in paragraph entitled "Sequence of Operation."]
2.5.3 Pressure-Operated Fire Alarm Switch
Provide a pressure switch to actuate the building interior fire alarm system upon the discharge of carbon dioxide.
2.5.4 Pressure-Operated Equipment Switch
NOTE: Omit if there is no air handling system serving the underfloor areas.
For each protected space, provide a switch to automatically shut down the air handling equipment upon the discharge
of carbon dioxide.
2.5.5 Control Panel
NOTE: Use only when electrical actuation is specified.
Provide modular type panel in a [flush] [surface] mounted steel cabinet with hinged door and cylinder lock.
Switches and other controls shall not be accessible without the use of a key. The control panel shall be a neat,
compact, factory-wired assembly containing all parts and equipment required to provide specified operating and
supervisory functions of the system. Panel cabinet shall be finished on the inside and outside with factory-applied
enamel finish. Provide separate alarm and trouble lamps located on the exterior of the cabinet door or visible
through the cabinet door for each zone initiating circuit. Provide prominent rigid plastic or metal identification
plates for all lamps and switches. [Provide a 100 mm 4 inch remote system trouble bell, installed [in a constantly
attended area] [where shown], arranged to operate in conjunction with the internal trouble signals of the panel.
Provide remote bell with a rigid plastic or metal identification sign which reads "Carbon Dioxide System Trouble."
Lettering on identification sign shall be a minimum of one inch high.] System control panel shall be UL listed
or FM approved for use in carbon dioxide fire extinguishing system control (releasing device service). [Provide
supervised isolation switch to permit testing or servicing of electrical control system without tripping of carbon
dioxide system.]
2.5.5.1 Trouble Signals
A single open or ground fault condition in detection (initiating) circuit shall not result in any loss of system
function, but shall cause the actuation of system trouble signals. A ground fault condition or single break
in any other circuit shall result in the activation of the system trouble signals. [Supervision of wiring external
to the control panel for mechanical equipment shutdown is not required, provided a break in such wiring will
cause the associated mechanical equipment to shut down.] Loss of AC power, a break in the standby battery power
circuits, or abnormal AC power or low battery voltage shall also result in the operation of the system trouble
signals. The abnormal position of any system switch in the control panel shall also result in the operation
of the system trouble signals. Trouble signals shall operate continuously until the system has been restored
to normal at the control panel.
2.5.5.2 Panel Switches
Panel shall be provided with the following switches:
a. Trouble silencing switch which transfers trouble signals to an indicating lamp. Upon correction
of the trouble condition, audible signals shall again sound until the switch is returned to
its normal position, or the trouble circuit shall be automatically restored to normal upon correction
of the trouble condition. The silencing switch shall be a momentary action, self-resetting
type.
b. Evacuation alarm silence switch which when activated shall silence associated alarm devices
and cause operation of system trouble signals.
c. Individual zone disconnect switches which when operated shall disable only their respective
initiating circuit and cause operation of the system and zone trouble signals.
d. Reset switch which when activated shall restore the system to normal standby status after
the cause of the alarm has been corrected.
e. Lamp test switch.
2.5.6 Secondary Power Supply
NOTE: Use only when electrical actuation is specified.
Provide nickel cadmium, lead calcium, or sealed lead acid batteries and charger. Dry cell batteries will not
be permitted. Provide steel cabinet with cylinder lock for batteries or house within control panel.
2.5.6.1 Storage Batteries
NOTE: Use only when electrical actuation is specified.
Provide batteries of the proper ampere-hour rating to operate the system under standby conditions for [60] [24]
hours and alarm conditions for an additional [30] [15] minutes. Supervise batteries for low voltage and circuit
continuity. Provide calculations substantiating battery capacity. Provide reliable separation between cells
to prevent contact between terminals of adjacent cells and between battery terminals and other metal parts.
2.5.6.2 Battery Charger
NOTE: Use only when electrical actuation is specified.
Provide automatic [high and low charging rate type] charger, capable of recovering batteries from full discharge
to full charge in 48 hours or less. [Provide an ammeter for recording rate of charge and a voltmeter to indicate
the state of battery charge.] Provide a red pilot light to indicate when batteries are manually placed on a
high rate of charge as part of the unit assembly if high-rate switch is provided.
2.6 DETECTOR
2.6.1 Open-Area (Spot-Type) Smoke Detectors
Design for detection of abnormal smoke densities by the [ionization] [photoelectric] principle. Provide control
and power modules required for operation integral with the main control panel. Detectors and associated modules
shall be compatible with the main control panel and shall be suitable for use in a supervised circuit. [Detector
circuits shall be of the four-wire type whereby the detector operating power is transmitted over conductors separate
from the initiating circuit.] [As an alternate, detector circuits of the two-wire type whereby the detector
operating power is transmitted over the initiating circuits are permitted if:]
a. Detectors used are approved by the control panel manufacturer for use with the control panel
provided.
b. The detectors are UL listed or FM approved as being compatible with the control panel.
[When two-wire detectors are used, the total number of detectors on a detection circuit shall not exceed 50 percent
of the maximum number of detectors allowed by the control panel manufacturer for that circuit and the standby
current draw of the entire system shall not exceed 50 percent of the rated output of the system power supply
modules. Additional zones above those specified in the paragraph entitled "Annunciation Zones" shall be provided
if required to meet the above requirements. Calculations showing compliance with the specified power consumption
limitation requirements shall be submitted.] The manufacturer's data submitted under the paragraph entitled
"Manufacturer's Catalog Data" shall clearly indicate the compatibility of the detectors with the control panel
provided and the maximum number of detectors permitted per zone. Malfunction of the electrical circuits to the
detector or its control or power units shall result in the operation of the system trouble signals. Each detector
shall contain a visible indicator lamp that flashes when the detector is in the normal standby mode and glows
continuously when the detector is activated. [Remote indicator lamp shall be provided for each detector located
above ceilings, beneath raised floors, or otherwise concealed from view.] Each detector shall be the plug-in
type with tab-lock or twist-lock, quick disconnect head and separate base in which the detector base contains
screw terminals for making wiring connections. Detector head shall be removable from its base without disconnecting
wires. Removal without disconnecting any wires. Removal of detector head from its base, shall cause activation
of system trouble signals. Each detector shall be screened to prevent the entrance of insects into the detection
chambers.
2.6.1.1 Ionization Detectors
Multiple chamber type which is responsive to both visible and invisible products of combustion. Detectors shall
not be susceptible to operation by changes in relative humidity.
2.6.1.2 Photoelectric Detectors
Operate on a multiple cell concept using a light-emitting diode (LED) light source.
2.6.2 Spot Heat Activated Detectors
Provide detectors for [surface] [flush] outlet box mounting. Support detectors independently of conduit, tubing,
or wiring connections. Detectors shall be completely metal enclosed and shall be [combination fixed temperature
and rate-of-rise] [fixed temperature and rate compensated] [_____] type. Contacts shall be self-resetting after
[response to rate-of-rise] actuation. [Operation under fixed temperature actuation shall result in an indication
which may be noted by external visual inspection of the detector, or the detector may be the self-resetting type.]
Provide fixed temperature type detectors in areas subject to abnormal temperature changes. [Furnish a portable
electric device suitable for testing the detectors.]
2.6.3 Detector Spacing and Location
NFPA 72, the manufacturer's recommendations, and the requirements stated herein. Spacing and location of detectors
shall take into account the airflow into the room and supply diffusers. Detectors shall not be placed closer
than 1.50 meters 5 feet from a discharge grill. [Spacing of detectors under raised floors shall not exceed [23.20
square meter] [250 square feet] [_____] per detector.] Detectors installed beneath raised floors shall be mounted
with the detector base within 50 mm 2 inches of the underside of the raised floor framing, with the detector
facing downward. Where the space under the raised floor is less than 305 mm 12 inches in height, detectors shall
be mounted with their bases in the upper half of the underfloor space. Under no circumstances shall detectors
be mounted facing upward.
2.7 INHIBIT SWITCH
Provide one switch where indicated. Activation of switch shall delay only time delay countdown, equipment shutdown,
and agent discharge. Switch shall be guarder, spring-loaded type which operates only when pressure is manually
applied to the switch. Upon release of manual pressure, switch shall deactivate allowing delayed functions to
resume. After start of agent discharge, switch shall have no effect. Activation of switch during normal (non-alarm)
conditions shall cause activation of system trouble signals.
2.8 ALARM SIGNALLING DEVICES
Provide each protected area with audible and visual alarms located as shown. Alarm circuits shall be electrically
supervised. Provide separate and distinct audible and visual pre-discharge and discharge signals. Where the
building is equipped with a separate fire evacuation alarm system, the discharge signals shall also be distinct
from those used by the building fire evacuation system. Each signal device shall be provided with a rigid plastic
or metal identification sign with lettering a minimum of 40 mm 1.5 inches high. The pre-discharge alarm shall
be labelled "FIRE" and the discharge alarm shall be labelled "CARBON DIOXIDE DISCHARGE." [Post-discharge visual
alarms shall be located outside entrances to protected areas, and provided with warning signs reading "CARBON
DIOXIDE DISCHARGED WHEN FLASHING - DO NOT ENTER."]
2.8.1 Alarm Bells
[Surface mounted] [Recessed], [_____] [250 mm] [10 inch] diameter with matching mounting back box. Bells shall
be of the vibrating type suitable for use in an electrically supervised circuit. Bells shall be of the underdome
type and produce a sound output rating of at least 90 decibels at 3 meters 10 feet. Bells shall be finished
in red enamel.
2.8.2 Alarm Horns
[Surface mounted] [Recessed], vibrating type suitable for use in an electrically supervised circuit and with
a sound output rating of at least 90 decibels at 3 meters 10 feet. Horns shall be finished in red enamel.
2.8.3 Visual Alarms
[Surface] [Flush] mounted lamp assembly suitable for use in an electrically supervised circuit. Lamp shall be
the flashing [stroboscopic] [incandescent] [rotary beacon] type and powered from the control panel alarm circuit.
Lamps shall provide a minimum of 50 candle power. Flash rate shall be between 60 and 120 flashes per minute.
Lamps shall be protected by a thermoplastic lens, red for pre-discharge alarms and blue for discharge [and post-discharge]
alarms. [Visual alarms may be part of an audio-visual alarm assembly.]
2.9 MAIN ANNUNCIATOR
Annunciator shall be integral with the main control panel. Provide separate alarm and trouble lamps for each
zone alarm initiating circuit located on the exterior of the cabinet door or visible through the cabinet door.
Supervision will not be required provided a fault in the annunciator circuits results only in loss of annunciation
and will not affect the normal functional operation of the remainder of the system. Each lamp shall provide
specific identification of the [zone] [area] [device] by means of a permanent label. In no case shall zone identification
consist of such words as "Zone 1," "Zone 2," but shall consist of the description of the [zone] [area] [device].
2.9.1 Annunciation Zones
Arranged as follows:
2.9.1.1 Remote Annunciator Panel
Locate as shown. Panel shall duplicate all requirements specified for the main control panel annunciator, except
that in lieu of individual zone trouble lamps a single trouble lamp may be provided. Panel shall have a lamp
test switch. Zone identification shall be by means of [permanently attached rigid plastic or metal plate(s)]
[silk-screened labels attached to the reverse face of backlighted viewing window(s)]. Panel shall be of the
[interior] [waterproof] type, [flush] [surface] [pedestal]-mounted.
2.9.1.2 Graphic Annunciator Panel
Locate as shown. Panel shall be of the [interior] [weatherproof] type, [flush] [surface] [pedestal]-mounted.
Panel shall be provided with the floor plan of the protected area(s), drawn to scale, with remote alarm lamps
mounted to represent the location of each alarm initiating device. Panel graphic shall also show the location
of the annunciator panel and control panel, and shall have a "you are here" arrow showing its location. Orient
floor plan on graphic to location of person viewing the graphic; i.e., the direction the viewer is facing shall
be towards the top of the graphic display. Provide a North arrow. [Principal rooms and areas shown shall be
labeled with their room numbers or titles.] The panel location shall be shown on the floor plan. Detectors
mounted on ceilings, [above ceilings,] and beneath raised floors [and different types of initiating devices]
shall have different symbols or lamps of different colors for identification. Lamps shall illuminate upon actuation
of their corresponding device and remain illuminated until the system is reset. Panel shall have a lamp test
switch.
2.10 AUTOMATIC SMOKE-FIRE DAMPERS
NOTE: Insert appropriate Section number and title in blank below using format
per UFC 1-300-02.
Provide automatic control of smoke-fire dampers in openings and ductwork penetrating the envelop of the protected
area. Smoke-fire dampers are specified in Section [23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST
SYSTEMS][_____]. Dampers shall close upon activation of second detector or upon activation of carbon dioxide
manual discharge station.
2.11 SMOKE AND CARBON DIOXIDE EXHAUST SYSTEM
NOTE: Insert appropriate Section number and title in blank below using format
per UFC 1-300-02.
Provide under Section [23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS][_____] and as specified
herein. Provide a key-operated ON/OFF switch with red and green indicator lights for control of exhaust fans
from each protected space. Green light shall remain illuminated when exhaust system is in standby status. Green
light shall extinguish and red light shall illuminate when system is operating. Provide an interlock from the
carbon dioxide system to prevent operation of exhaust system during carbon dioxide system discharge and for a
minimum of 10 minutes after carbon dioxide discharge. Ten minutes after carbon dioxide discharge, exhaust system
shall be operable by the key switch even if smoke detectors are still in alarm mode. Locate switches outside
the protected spaces.
2.12 OPERATING POWER
NOTE: Delete the first three sentences (in brackets) if electrical actuation
systems are not specified.
[Obtain AC operating power to control panel and battery charger from the line side of the incoming building power
source ahead of all building services] [at the location indicated]. Provide independent, properly fused safety
switch, with provisions for locking the cover and operating handle in the POWER ON position for these connections,
and locate adjacent to the main distribution panel. Paint switch box with red enamel and identify by a lettered
designation. Provide wiring in accordance with NFPA 70. Wiring for 120-volt circuits shall be No. 12 AWG minimum.
Wiring for low-voltage DC circuits shall be No. 14 AWG minimum. Wiring shall be color coded. Provide wiring
in metal conduit or electrical metallic tubing.
2.13 CONDUCTOR IDENTIFICATION
Identify circuit conductors within each enclosure where a tap, splice, or termination is made. Conductor identification
shall be by plastic-coated, self-sticking printed markers or by heat-shrink type sleeves. Attach the markers
to prevent accidental detachment. Identify control circuit terminations.
2.14 OPERATING INSTRUCTIONS
Provide at each remote control station. Instructions shall clearly indicate steps for system operation. The
proposed legend for operating instructions shall be approved before installation. Instructions shall be embossed
white letters on red rigid plastic backgrounds. Lettering shall be a minimum of 6.50 mm 0.25 inch high for operating
instructions and 25 mm 1 inch high for identification of system operating devices and control valves.
PART 3 EXECUTION
3.1 INSTALLATION
Equipment, materials, installation, workmanship, fabrication, assembly, erection, examination, inspection, and
testing shall be in accordance with NFPA 12, except as modified herein. Install piping straight and true to
bear evenly on hangers and supports. Keep the interior and ends of new piping and existing piping affected by
the Contractor's operations thoroughly cleaned of water and foreign matter. Keep piping systems clean during
installation by means of plugs or other approved methods. When work is not in progress, securely close open
ends of piping to prevent entry of water and foreign matter. Inspect piping before placing into position.
3.2 PIPE AND FITTINGS
Test, inspect, and approve piping before concealing. Provide fittings for direction changes in piping and for
connections. Jointing compound for pipe threads shall be Teflon pipe thread paste; apply only to male threads.
Provide exposed ferrous pipe threads with one coat of zinc molybdate primer applied to minimum dry film thickness
of 0.025 mm 1.0 mil. Pipe nipples 150 mm 6 inches long and shorter shall be Schedule 80 steel pipe. Provide
tapered-reducing pipe fittings for changes in piping size; bushings will not be permitted. Minimum pipe sizes
for hose reel systems shall be 20 mm 0.75 inch.
3.3 PIPE HANGERS AND SUPPORTS
Provide additional supports for the concentrated loads in piping between hangers and supports, such as for valves.
Support steel piping as follows:
MAXIMUM SPACING (METERS)
__________________________________________________________________________
Nominal Pipe 25.0 and
Size (mm) Under 32 40 50 65 80 100 125 150
Steel Piping 2.10 2.40 2.75 3.00 3.40 3.70 4.30 4.60 5.20
___________________________________________________________________________
MAXIMUM SPACING (FEET)
__________________________________________________________________________
Nominal Pipe 1.0 and
Size (Inches) Under 1.25 1.5 2 2.5 3 4 5 6
Steel Piping 7 8 9 10 11 12 14 15 17
___________________________________________________________________________
3.4 FIELD PAINTING
Clean, pretreat, prime, and paint new carbon dioxide fire extinguishing systems including valves, piping, conduit,
hangers, supports, miscellaneous metalwork, and accessories. Apply coatings to clean, dry surfaces, using clean
brushes. Clean surfaces to remove dust, dirt, rust, and loose mill scale. Immediately after cleaning, provide
the metal surfaces with one coat of pretreatment primer applied to a minimum dry film thickness of 0.076 mm 0.3
mil, and one coat of zinc molybdate primer applied to a minimum dry film thickness of 0.025 mm 1.0 mil. Shield
operating devices with protective covering while painting is in process. Upon completion of painting, remove
protective covering from operating devices. Remove devices which are painted and replace with new devices.
Provide primed surfaces with the following:
3.4.1 Systems in Unfinished Areas
Unfinished areas are defined as attic spaces, spaces above suspended ceilings, crawl spaces, pipe chases, and
spaces where walls or ceilings are not painted or not constructed of a prefinished material. Provide primed
surfaces with one coat of red alkyd gloss enamel applied to a minimum dry film thickness of 0.025 mm 1.0 mil.
3.4.2 Systems in Other Areas
Provide primed surfaces with two coats of paint to match adjacent surfaces, except provide valves and operating
accessories with one coat of red alkyd gloss enamel applied to a minimum dry film thickness of 0.025 mm 1.0 mil
. Provide piping with 50 mm 2 inch wide red enamel bands or self-adhering red plastic tape bands spaced at maximum
of 6 meters 20 foot intervals throughout the piping systems, except in finished areas, such as offices, the red
bands may be deleted.
3.5 FIELD QUALITY CONTROL
Perform tests to determine compliance with the specified requirements in the presence of the Contracting Officer.
Test, inspect, and approve piping before covering or concealing.
3.5.1 Preliminary Tests
Pneumatically test each piping system with carbon dioxide, nitrogen, or dry air at 1034 kPa (gage) 150 psig for
2 hours with no leakage or reduction in gage pressure. Gages used shall be calibrated. Upon completion and
before final acceptance of the work, test each piping system by discharging a minimum of one 34 kg 75 pound cylinder
of carbon dioxide to demonstrate the reliability and proper functioning of each pressure-operated switch and
the discharge of carbon dioxide gas from each system discharge nozzle. After discharge, clean wire screens at
nozzles if provided. If screens or nozzles show evidence of plugging, discharge an additional cylinder with
the nozzles removed. Individually test remote control stations and other components and accessories to demonstrate
proper functioning. When tests have been completed and corrections made, submit a signed and dated certificate.
3.5.2 Formal Inspection and Tests
Do not submit request for formal tests and inspection until preliminary tests and corrections are complete and
approved. The [_____] Division, Naval Facilities Engineering Command, Fire Protection Engineer, will witness
formal tests and approve all systems before they are accepted. Submit written request for formal inspection
at least [_____] [15] working days prior to the inspection date. An experienced technician regularly employed
by the system installer shall be present during the inspection. At this inspection, repeat the required tests
as directed. Furnish carbon dioxide, instruments, appliances, equipment, and personnel for the tests.
3.6 SCHEDULE
Some metric measurements in this section are based on mathematical conversion of inch-pound measurement, and
not on metric measurement commonly agreed to by the manufacturers or other parties. The inch-pound and metric
measurements shown are as follows:
Products Inch-Pound Metric
Alarm Bells Diameter - 10 in. Diameter - 250 mm