HPCO2 Engineering Manual
description
Transcript of HPCO2 Engineering Manual
Tomco2 Fire Systems 8/16/10 Rev. 0
High Pressure CO2 Engineering, Installation and
Operation Manual
7619 Hamilton Avenue Cincinnati, OH 45231
USA (513) 729-3473 phone
(513) 729-3444 fax
Tomco2 Fire Systems 8/16/10 Rev. 0
TABLE OF CONTENTS SECTION DESCRIPTION 1 INTRODUCTION 2 SYSTEM COMPONENTS 3 SYSTEM DESIGN 4 INSTALLATION 5 OPERATION AND SERVICE
Tomco2 Fire Systems Introduction 8/16/10 Rev. 0
SECTION 1
INTRODUCTION
Table of Contents Paragraph Subject 1-1 Purpose 1-2 Description 1-3 Properties of Carbon Dioxide 1-4 Quality of Carbon Dioxide 1-5 Safety
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SECTION 1
INTRODUCTION
1-1 PURPOSE
The intent of this manual is to provide the user with the information necessary to adequately select, operate and maintain our high pressure CO2 fire suppression equipment required to protect a specific hazard.
1-2 DESCRIPTION A. A high pressure CO2 system is a specialized fire suppression system designed to
maintain the carbon dioxide supply at 70º F and 850 psig in strength alloy steel cylinders. The cylinders contain the CO2 required to protect the largest single hazard and any number of back-up discharges required by the authority having jurisdiction.
B. On large hazards where several cylinders are required, a manifold is used to connect
each cylinder by means of flexible hoses and check valves. C. Cylinder valves control the CO2 flow to the hazard through properly sized pipe,
terminating in nozzles that apply the CO2. Flow rate is controlled by nozzle orifices as well as pipe sizes. The cylinder master valves are electronically operated and the slave valves are back pressure actuated. The master valves can be automatically and/or manually operated.
D. Lock-Out Valves
A lock out shall be installed on all systems where carbon dioxide could migrate, creating a hazard to personnel. The valves shall be supervised for both automatic and manual systems unless specifically waived by the authority having jurisdiction. Systems shall be locked out when persons not familiar with the systems and their operation or when persons are present in locations where discharge of the system will endanger them before they can proceed to a safe location within the time delay period.
E. The equipment is UL listed for an ambient temperature range of 0°F to 130°F (-18°C to
54°C) of the protected area. Any approved releasing control panel can provide automatic actuation. Electric release stations provide manual release. The control panel operates the alarm devices, provides shut-down of auxiliary equipment, and supervises all circuits. The control panel also provides delays so alarms (audible and visual) in the protected area can evacuate personnel before the CO2 discharges.
F. Pneumatic Time Delays
A pneumatic pre-discharge alarm and pneumatic time delay shall be provided for all total flooding systems protecting normally occupied and occupiable enclosures where the discharge will expose personnel to hazardous concentrations of carbon dioxide. (NFPA 12, Paragraph 4.5.6, 2005 Edition) The pneumatic pre-discharge alarms and pneumatic time delays are required on all new installations and it is mandated that all existing systems be upgraded no later than December 31, 2008.
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1-3 PROPERTIES OF CARBON DIOXIDE A. Under normal atmospheric temperature and pressures, carbon dioxide exists as a
colorless, odorless gas which is about 1.5 times heavier than air. Carbon dioxide will not burn or support combustion and will not sustain life.
B. When confined within a suitable pressure vessel and depending on temperature and
pressure conditions, carbon dioxide can exist in any of three stages of matter; solid, liquid and gas. The point at which all three states may exist is -69.9º F and 60.4 psig. This is called the triple point. At temperatures and pressures lower than -69.9º F and 60.4 psig, carbon dioxide may be either a solid or gas, again depending on conditions. Solid carbon dioxide (dry ice) at a temperature of -119.4º F and atmospheric pressure, sublimes (transforms directly from a solid to a gas without the formation of liquid).
C. The critical point of carbon dioxide is 87.8º F and 1057.4 psig. At temperatures and
pressures greater than 87.8º F and 1057.4 psig, carbon dioxide liquid cannot exist. D. At temperatures and pressures above -69.9º F and 60.4 psig, and below 87.8º F and
1057.4 psig, carbon dioxide liquid with overlying vapor may exist in equilibrium within a closed vessel. Within this range, there is a definite relationship between temperature, pressure and density.
E. The term “high pressure” is used to describe storage of carbon dioxide at ambient
temperature which is usually 850 psig @ 70° F.
Tomco2 Fire Systems Introduction 8/16/10 Rev. 0
1-3
F.
-120 -100 -80 -60 -40 -20 0 20 40 60 80 100 120 14010
20
30
40
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708090
200
300
400
500
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8009001000
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ATMOSPHERIC PRESSURE
TRIPLE POINT
SOLIDREGION
CRITICALTEMPERATURE
LIQUID REGION
VAPOR
TEMPERATURE DEG F
ABSOLUTE PRESSURE LBS./SQ. IN.
For SI Units: 1 psi = 0.0689 bars: ºC = 5/9(ºF -32).
Figure 1-1 Variation of Pressure of Carbon Dioxide with Change in Temperature (Constant Volume). Below the critical
temperature (87.8º F) (31º C), carbon dioxide in a closed container is part liquid and part gas. Above the critical temperature
it is entirely gas.
Figure 1-1 Vapor Pressure Curve
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1-4 QUALITY OF CARBON DIOXIDE
Carbon dioxide used for initial supply and replenishment shall be of good commercial grade, free of water and other contaminants that might cause container corrosion or interfere with free discharge through nozzle orifices. Carbon dioxide obtained by converting dry ice to liquid will not be satisfactory unless it is properly processed to remove excess water and oil. The vapor phase shall be not less than 99.5 percent carbon dioxide with no detectable off-taste or odor. The water content of the liquid phase shall be not more than 0.01% by weight (-30º F [-34º C] dew point). Oil content shall be not more than 10 PPM by weight. Caution: Carbon Dioxide should not be used to protect the following hazards:
1. Chemical compounds such as gunpowder or cellulose nitrate which supply
their own oxygen. 2. Reactive materials such as sodium, potassium, magnesium, titanium,
zirconium, uranium and plutonium. 3. Metal hydrides. 4. Chemicals capable of undergoing auto thermal decomposition (hydrazine
and certain organic peroxides).
1-5 SAFETY A. Pressure Hazard - The storage cylinders covered in this manual may contain
pressures over 850 psig (59 bar/5,861 kPa). Sudden release of this pressure may cause personal injury by issuing cold gas or liquid, or by expelling parts during servicing. Do not attempt any repairs on these cylinders until all pressure is released and the contents have been allowed to vaporize to ensure no pressure buildup can occur.
B. Extreme Cold - Cover Eyes and Exposed Skin - Accidental contact of the skin or eyes
with carbon dioxide may cause a freezing injury similar to frostbite. Protect your eyes and cover your skin when handling the tank or transferring liquid, or in any instance where the possibility of contact with liquid, cold pipes and cold gas may exist. Safety goggles or a face shield should be worn when withdrawing liquid or gas. Long-sleeved clothing and gloves that can be easily removed are recommended for skin protection.
C. Keep Equipment Well Ventilated - Although carbon dioxide is non-toxic and non-
flammable, it can cause asphyxiation in a confined area without adequate ventilation. An atmosphere of carbon dioxide does not contain enough oxygen for breathing and will cause dizziness, unconsciousness, or even death. Carbon dioxide cannot be detected by the human senses and will be inhaled normally as if it was air. Ensure there is adequate ventilation where carbon dioxide is used and store tanks in a well ventilated area.
D. Install Relief Valves in Liquid Lines - When installing piping make certain a suitable
safety relief valve is installed in each section of piping between valves. Trapped liquefied gas will expand as it warms and may burst hoses or piping causing property damage or injury.
Tomco2 Fire Systems Operation And Service 8/16/10 Rev. 0
SECTION 2
SYSTEM COMPONENTS
Table of Contents Paragraph Subject 2-1 Cylinder Assemblies 2-2 Discharge Bends and Adapters 2-3 Cylinder Brackets 2-4 Check Valves 2-5 Bleeder Valves 2-6 Discharge Nozzles 2-7 Manual Actuator 2-8 Electric Actuation 2-9 Discharge Pressure Switch 2-10 Pressure Release Trip 2-11 Header Safety 2-12 Pressure Operated Siren 2-13 Cylinder Assemblies 2-14 Lock-Out Valves 2-15 Pneumatic Time Delay
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SECTION 2
SYSTEM COMPONENTS 2-1 CYLINDER ASSEMBLIES
A basic cylinder assembly consists of a pressure vessel, a valve and siphon tube assembly, and a charge of carbon dioxide. A variety of cylinder sizes are available. They are all designed to hold pressurized carbon dioxide in liquid form at atmospheric temperatures, corresponding to a normal pressure of 850 psi at 70°F (58.6 bar at 21°C). All cylinders are seamless. They are manufactured and tested in accordance with the requirements of Department of Transportation and/or Transport Canada, Specification 3AA-1800 or higher. Larger cylinders having capacities of 35, 50, 75 and 100 pounds (15.9, 22.7, 34 and 45 kg) are made of steel. Small cylinders, used for special applications, have capacities of 10 and 15 pounds (4.5 and 6.8 kg) and may be made of aluminum or steel, depending on availability. Except for special temperature conditions, all cylinders are filled to their specified weight with liquid carbon dioxide. Cylinders are not partially filled. The pressure inside the cylinder will vary as the temperature changes. In general, the ambient storage temperature for standard cylinders used in local application systems should be between 32°F and 120°F (0°C and 49°C). For standard cylinders used in total flooding systems, the ambient storage temperature should be between 0°F and 130°F (-18°C and 54°C). Two cylinder valves are available: the SW-50M (master) and the SW-50S (slave). Both are manufactured of brass with an optional nickel plated finish. The valves are of the force differential type using a piston seal. The pressure above the piston is maintained at cylinder pressure, but the area at the top of the piston is greater than the seal area. This results in a higher force above the piston, which acts to keep the valve closed. To open the valve, the pressure above the piston is vented and cylinder pressure raises the piston to open the valve. A transport plug is attached to the valve by a chain attached to the discharge port when the cylinder is disconnected from the discharge piping. A pressure safety disc, incorporated into the cylinder valve, is designed to release pressure should the cylinder be subjected to exceptionally high temperatures or other abnormal conditions. The disc rupture point is in the range of 2,600 to 3,000 psi (182.7 to 206.8 bar). The safety disc nut is of a type that will relieve pressure without cylinder recoil. The SW-50M master valve can be operated manually, by pressure actuator, with a solenoid valve kit, or by direct back pressure from the discharge manifold. The SW-50S slave valve can b operated only by direct back pressure from the discharge manifold. Single cylinder systems simply require a single SW-50M with a manual actuator and/or a solenoid valve. This is generally referred to as a master cylinder. For systems with two cylinders interconnected, only one master valve is required. The other cylinder is operated by a SW-50S slave valve. For systems with three or more cylinders interconnected, two cylinders must act as masters and have solenoid and/or manual actuators arranged for simultaneous operation. A rigid siphon tube is used in all cylinders to ensure liquid discharge. All cylinders must therefore be installed in a normal upright position.
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2-2 DISCHARGE BENDS AND ADAPTERS
A discharge bend is used to connect the cylinder valve outlet to the system manifold and discharge piping. This flexible hose allows for the temporary misalignment of the cylinders on installation, and for ease of cylinder removal for maintenance. The cylinder end of the hose has a swivel connection for ease of installation. A discharge bend with a built-in check valve must be used when cylinders are manifolded together. The check valve is locked onto the hose assembly and must not separated from it. If a cylinder assembly is disconnected from the discharge bend, and if the system operates while the cylinder is disconnected, the check valve will ensure that an appreciable quantity of carbon dioxide will not discharge from the disconnected discharge bend. Flexible discharge bend adapter combinations are available for single cylinder systems where a check valve is not required. When the discharge adapter is used without the flexible bend, a union connection must be installed close to the cylinder for ease of installation and maintenance. It is important that neither the discharge bends nor the discharge adapter be mounted onto the cylinder valve during transportation and storage. The transit plug must remain in place on cylinder valve until the cylinder is installed and secure in its brackets.
2-3 CYLINDER BRACKETS
The cylinder can be arranged to be bracketed to a wall or to be free standing when no wall is available. Straps for single cylinder wall mounting installations are available from Tomco Fire Systems. Brackets for multiple wall mounted installations and frames for multiple cylinder free standing installations are normally supplied by the installer, and assembled on site to suit space available. For installation of three or more cylinders, a variety of arrangements can be fabricated by installer. The single row, wall mounting arrangement is recommended for installations of up to five cylinders. Double row, free standing arrangements have the advantage (particularly for systems using main and reserve cylinders, and for joint systems), that any cylinder can be removed for recharging without disturbing the others. However, this arrangement requires two aisles and considerably more space. The double row, wall mounting arrangement is generally used when sufficient space is not available for free standing arrangement or for single row wall mounting arrangement. For marine applications, additional cylinder supports are required. Two straps or sets of retainers must be used.
2-4 CHECK VALVES
A range of check valves are available. These are used to isolate the main cylinder manifold from the interconnected reserve cylinder manifold. In the manifolds of joint systems they are also used to prevent the discharge from activated cylinders causing activation of the other cylinders in the bank.
2-5 BLEEDER VALVES
Bleeder valves are used in the manifolds of main and reserve banks of cylinders, as well as in the manifolds of systems that have selector valves (joint systems). The bleeder valve
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vents accidental check valve leakage (that could discharge the other bank or banks of cylinders) from one bank to the other. The valve is normally open and closes when manifold pressure reaches approximately 20 psi (1.4 bar) to prevent loss of CO2 under normal discharge conditions. The pipe connection is 1/2" NPT.
2-6 DISCHARE NOZZLES
Two types of discharge nozzle are available: total flooding type and local application type. Total flooding nozzles are used where an even distribution of gas is required throughout and enclosure. Local application or directional nozzles are used where a concentration of carbon dioxide is required on a particular surface or piece of equipment. Nozzles are designed to discharge large volumes of carbon dioxide without freezing. For local application use (when installed in accordance with their approvals), the velocity of discharge from the nozzle is reduced to prevent agitation and splattering of hazardous material which could spread the fire. All nozzles have a drilled orifice. The nozzle orifice size will vary depending on the flow and the location of the nozzle in the system. It is important that nozzles are installed exactly as specified on the project drawings, otherwise system performance will be jeopardized. The wall type and vent type nozzles are used exclusively for total flooding installations. The S-Type nozzle may also be used for total flooding installations, however, its cost normally restricts its use to local application installations. The S-Type nozzle may be fitted to flanges to enable it to be mounted onto sheet metal equipment closures and ductwork. It may also be supplied with a frangible disc to prevent clogging of the orifice. Special finishes for nozzles are available and can be provided by special order to suit project requirements.
2-7 MANUAL ACTUATOR
A manual actuator is used to operate the carbon dioxide system manually and locally at the cylinders. The actuator is screwed into a port on the top of the SW-50M cylinders valve. When two master cylinders are required, the levers of the two actuators are joined together with a connecting link for simultaneous operation. The actuator has a hole in the side of the main body fitted with a blank plug. The hole allows to actuator to be operated from an external pressure source. It is also used to connect to the discharge from the solenoid valve (when used). The blank plug is removed from the actuator only for these two purposes. Otherwise the plug must remain tightly connected at all times. The hand lever on the manual actuator can be operated from a remote location. This is achieved be connecting 1/16” diameter stainless steel cable to the end of the lever, and running the cable through 1/2" conduit or 3/8” pipe to a pull box using corner pulleys at each change in cable direction. Using a mechanical dual junction box, two remote pull boxes can be joined to operate one master cylinder arrangement. Or, one remote pull box can be used to operate two separate manual actuators.
2-8 ELECTRIC ACTUATOR
Electric actuation is achieved by using a solenoid valve kit. The solenoid valve is normally closed device, closed when de-energized and open when energized. The standard solenoid voltage is 24 VDC, but other voltages and special enclosures (including explosion-proof) are available by special order. The standard electric connection is by a DIN connector, and a cable assembly is available for ease of connection to field wiring.
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The solenoid coil is designed and rated for continuous duty service. However, it is recommended that the actuating circuit incorporate a shut-down device (e.g. a pressure switch or time delay relay) to open the circuit when the cylinder is empty. When the coil is energized for a long period of time, the solenoid enclosure becomes hot. This is a safe operating temperature and will not damage the solenoid. Any excessive heating will be indicated by smoke of burning coil insulation. The solenoid valve connects directly to a special adapter on the SW-50M cylinder valve. The discharge side of the solenoid valve is connected to the pressure port on the manual actuator with supplied 3/16” braided hose. When de-energized, the solenoid valve opens allowing pressure from above the main piston of the cylinder valve to operate the actuator and open the valve. The solenoid should be connected to a Listed control panel that is powered through a separately fused circuit, and that also incorporates battery backup power.
2-9 DISCHARGE PRESSURE SWITCH
The pressure switch connects to the carbon dioxide discharge piping and operates when the system discharges. The switch may be wired with contacts in the open or closed position. Operation causes the electrical switch contacts to reverse position. Switches can be used to confirm system discharge, to operate alarms, to shutdown motors, pumps, fans and conveyors, to release magnetic door holders, etc., automatically when the system discharges. The switch may be mounted in any position, but preferred installation in with the pressure connection (CO2 supply line) entering from the bottom. The switch enclosure is rated for standard and weatherproof conditions. When the line load of the equipment to be operated is greater than the switch rating, the switch should be used to break a relay holding-coil circuit.
2-10 PRESSURE RELEASE TRIP
The pressure release trip can be used to release dampers, close fire doors, windows, louvers, fuel supply valves, to open dump valves, etc., automatically when the system discharges. The equipment to be operated must be weight or spring loaded, or be pivoted off centre. The release trip is connected to a carbon dioxide discharge piping for operation when the system discharges. Cable from the equipment to be controlled is looped over the pressure release operating stem. When the trip is operated, the stem retracts and the cable is released.
2-11 HEADER SAFTEY This pressure relief device is installed in sections of closed piping such as between selector valves and the cylinder manifold. It is a frangible disc assembly designed to rupture if trapped CO2 expands and the line pressure exceeds 2,650 to 3,000 psi (182.7 to 206.8 bar). The body is made of brass and the pipe connection is 1/2" NPT.
2-12 PRESSURE OPERATED SIREN This unit sounds an alarm by means of carbon dioxide pressure. It is connected t the discharge piping of the system, or to a spate independent carbon dioxide cylinder. Sirens should be located throughout the hazard area in order to ensure an audible alarm will be heard on the activation and discharge of the carbon dioxide system. Due consideration should be given to the normal background noise in the area.
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The carbon dioxide system incorporates a delayed action device, the siren must be arranged to operate at the same time that the delayed action device is initiated. When connected to the carbon dioxide system piping, the alarm will cease when the gas discharge had been completed. If it is desirable or necessary for the sirens to operate for a longer period of time than will be allowed by the system discharge time, a separate independent carbon dioxide cylinder must be used.
2-13 CYLINDER ASSEMBLIES Carbon dioxide cylinders may be located inside or outside the protected space, although it is preferable to locate them outside the space. When they are installed within the space they protect, a remote manual control should be installed to ensure the system can be actuated from a safe location outside the fire area. The cylinders should be located to provide convenient access so that they can be readily inspected and easily removed after use for recharging. They should not be installed where that will be exposed to the weather elements or the direct rays of the sun. Cylinders should not be installed where they will be subjected to temperatures of less than 0°F (-18°C) or higher than 130°F (54°C), unless otherwise specified. If cylinders are located in hazardous (explosion-proof) area, the cylinder solenoid should be approved for such use, and the installation of all materials needs to be done in an approved manner. Cylinders should be installed in the normal upright position. All cylinders are provided with a siphon tube.
.
2-14 LOCK-OUT VALVE ASSEMBLY A lock-out valve should be provided with all systems where CO2 could migrate creating a hazard to personnel. The valve should be located in the discharge piping between the nozzles and supply in the fire suppression system. The valve is used to prevent accidental or deliberate discharge when persons not familiar with the system are present in the protected space. The valve shall be maintained in the open position. Closing this valve takes the system out of service. The valve position should be continuously monitored at the control panel and is equipped with a pad-locking device to lock the valve in the open or closed position. Manually operated valves in the 1/2", 3/4", 1”, 1 1/4", 1 1/2" and 2” sizes are the full port ball valve type. Each valve is equipped with a pad locking type handle and supervisory switch is normally maintained in the fully open position.
2-15 PNUEMATIC TIME DELAY A pneumatic time delay shall be provided for all total flooding systems protecting normally occupied and occupiable enclosures and local application systems where the CO2 discharge will expose personnel to hazardous concentrations. The pneumatic time delay delays the discharge of CO2 for predetermined amount of time. This extra time allows additional time for ventilation and equipment shutdown. The time delay is installed between the master CO2 cylinders and the discharge nozzles. The time delay has inlet port and outlet port, both with a 3/4" NPT connection. The actual time delay period is per-set at the factory. Tomco Fire Systems offers both 30 and 60 second time delays. The time delay will operate at temperatures from 0 to 130°F. Note: Delay times will vary slightly with the ambient temperature. The time delay is equipped with manual override lever. This lever allows the time delay to be bypassed and allows the CO2 to discharge immediately.
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
SW-50 Cylinder Valve
Page 1 of 1 51-0141-0997
SW-50MMaster Valve
SW-50SSlave Valve
DischargePort
SafetyRelief
ManualActuatorPort
Main ValveCavity
SolenoidActuator
ProtectionCap
Vent
Vent
Slave PistonCavity
1inchNPT Thread
5 in(127 mm)
2 in(50 mm)
Top View
Side View
1inchNPT Thread
Minimum Burst Pressure 6,000 PSI (414 Bar)
Safety Relief Operating Pressure 2,650 to 3,000 PSI (182 to 207 Bar)
Equivalent Length 5 feet (1.5 m) of ½" Schedule 40 Black Pipe
Dimensions 5" (127 mm) high x 2" (50 mm) wide
Operating Temperature 0° F to 130° F (-18° C to 54° C)
Weight 3.5 lb. (1.6 kg)
96060233 SW-50M Master Valve, Brass
96060286 SW-50M Master Valve, Nickel Plated
96060232 SW-50S Slave Valve, Brass
96060285 SW-50S Slave Valve, Nickel Plated
Remove safety plugs from valve only after securing cylinder in cylinder bracket.
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High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Typical Single-Cylinder Installation
Page 1 of 1 51-1050-0398
To Nozzles
Discharge Hosewith Check V alveor Discharge AdapterP/N 96060242
Junction Boxby Installer
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Electrical ConnectorP/N 96110012
Manual ActuatorP/N 96060235
Solenoid V alve KitP/N 96060322
Master Cylinder Assembly
Cylinder Strap
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High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
ToElectrical Control
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Discharge Bendwith Check ValveP/N 96060237
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Master Cylinder Assembly
Manual ActuatorP/N 96060235
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Slave Cylinder Assembly
Cylinder BracketryFabricated by Installer
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Typical Two-Cylinder Installation
Page 1 of 1 51-1051-0501
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Oh
4523
1Te
leph
one
+1
513
729-
2473
Fax
+1
513
729-
3444
Web
site
tom
cofi
resy
stem
s.co
mPa
ge 1
of 1
51-5
1-10
53-1
097
Typi
cal M
ain
and
Rese
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Cylin
der I
nsta
llatio
nTo
Elec
tric
al C
ontr
ol
Man
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tor
P/N
960
6023
5
To N
ozzl
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Elec
tric
al C
onne
ctor
P/N
961
1001
2
Sole
noid
Val
ve K
itP/
N 9
6060
322
Cylin
der B
rack
etry
Fabr
icat
ed b
y In
stal
ler
Man
ifold
by
Inst
alle
r
Opt
iona
lPr
essu
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witc
hP/
N 0
6-02
47
Mas
ter C
ylin
der
Ass
embl
ySl
ave
Cylin
der
Ass
embl
y
Dis
char
ge B
end
with
Che
ck V
alve
P/
N 9
6060
237
39"
58"
Chec
k Va
lve
½" P
/N 9
6060
140
3/4"
P/N
960
6032
81"
P/N
960
6032
7
Main
Reserve
Mas
ter C
ylin
der
Ass
embl
ySl
ave
Cylin
der
Ass
embl
y
Junc
tion
Box
by In
stal
ler
Chan
geov
er S
witc
h
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
90º to operate
5 1/4 in(133 mm)
3 1/8 in(79 mm)
2 9/16 in(65 mm)
0.14 in(3.6 mm)
1/8" NPT hole with plug.This plug is to be removedonly to install a pressuresource.
Locking Nut.Unscrew 1/4 turnto orientate body.
SW-50 Discharge Valve
Ensure piston is retractedbefore assembling to valve.
ConnectingLink Assembly96060344 (Brass)
Manual/PressureActuator
SW50M
Manual/Pressure Actuator
Page 1 of 1 51-0142-0997
Connecting link used for simultaneous operation of two cylinder valves. Also used for remote manual cable operation, non-tension type.
1. Install actuator only after cylinders have been secured in their
brackets.
2. Before connecting actuator to cylinder valve, ensure:
a) (a) The pull pin is installed and secured with a seal.
b) (b) The piston is retracted as indicated.
3. Install the actuator to the cylinder valve, hand tighten.
4. Minimum pressure required for pressure operation:
For 850 psi cylinder pressure (70º): 260 psi
For 2,280 psi cylinder pressure (130º): 665 psi
5. When a solenoid actuator is used, discharge from solenoid valve
must be connected to the pressure port of the manual actuator.
Part Number: 96060235 (Brass) 96060235 (Nickel Plated)
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Solenoid Actuator
Page 1 of 1 51-0143-0997
DIN Connector
3/16" flexible hose.Connect to manual
actuator.
Tighten couplingnut securely
SW-50MCylinder Valve
Tighten afterconnecting
actuator to valve
Electrical Rating: 24 vdc, 10 watts.
Important 1. The carbon dioxide cylinder assembly must be restrained in its bracket and discharge piping connected
before solenoid actuator is connected to or disconnected from the cylinder valve.
2. The discharge from the solenoid valve must be connected to the manual actuator with the 3/16 inch fl exible
hose provided.
Notes1. The solenoid valve is normally closed. It opens when energized.
2. Solenoid enclosure is a general purpose type. Drip proof, raintight and explosion-proof enclosures are avail-
able by special order.
3. Standard voltage is 24 vdc. Other voltages are available by special order.
4. The solenoid valve is designed and rated for continuous duty service.
5. Operating temperature: 0 to 130 °F (-18 to 54 °C).
Part Number: 96060322
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Flexible Discharge Bends
Page 1 of 1 51-0144-0997
Hose Specifi cation
Hose Type SAE 100R1 Type AT
Minimum Burst Pressure 5,000 PSI
Minimum Bend Radius 9.5 Inches
Equivalent Length, Discharge Bend and Check Valve
7.3 Feet (2.22 m) Of 1/2" Std Black Pipe.
Bend Assembly22" overall Length
Check Valve
Swivel
DischargeAdapter P/N 96040148
Swivel
Discharge Bend& Check ValveP/N 96060237
Discharge Bendwith AdaptorP̀/N 96060242
Bend Assembly22" overall Length
1-1/16" - 12 UNValve Discharge Port
½" NPT Male solidto Manifold
½" NPT Male solidto Manifold
Use• The discharge bend and check valve are supplied locked
together as a single unit.
• The discharge bend and check valve assembly must be used whenever cylinders are manifolded together.
• The discharge bend and adaptor assembly may be used for single cylinder systems.
Installation• Cylinders and manifold must be installed securely before the
discharge bends are installed.
• Apply Tefl on tape (pipe sealant) to the solid male 1/2" NPT pipe thread on then end of the hose.
• Screw the solid male 1/2" NPT end of the discharge bend into the manifold, wrench tight.
• Remove the safety shipping plug from the discharge port of the SW-50 cylinder valve and install the swivel end of the discharge bend assembly into the discharge port of the valve, wrench tight.
704 S. 10th Street • P.O. Box 610 • Blue Springs, Missouri 64013-0610 U.S.A. • (816) 229-3405 • Fax (816) 229-0314 • www.�ke.com
Architect and Engineer Speci�cation
CATALOGNUMBERC.1.32.01
PNEUMATICTIME DELAY
July, 2002Revised Issue
Marine Suppression System
DESCRIPTION
The pneumatic time delay delays the discharge of CO 2 fora predetermined amount of time. This extra time allows per-sonnel to get out of the discharge area. It also allows addi-tional time for ventilation and equipment shutdown.
The time delay is installed between the master CO 2 cylin-ders and the discharge nozzles. The time delay has an inletport and an outlet port, both with a ¾" NPT connection. Theactual time delay period is pre-set at the factory. Tomco Fire Systems o�ers both 30 and 60 second time delays.
The time delay will operate at temperatures from 0 to 130° F.Note: Delay times will vary slightly with the ambient tem-perature.
The time delay is equipped with a manual override lever.This lever allows the time delay to be bypassed and allowsthe CO 2 to discharge immediately.
SPECIFICATIONS
Dimensions: 5 1/2" x 5 7/8" x 23 3/8"(139.7 x 149.2 x 593.7 mm)
Materials: Time Delay - BrassOverride lever - Stainless SteelPaint - Red gloss enamel
INSTALLATION
The pneumatic time delay is installed onto the dischargepiping of the manifold. The valve body has a 3/4" NPT(20mm) threaded inlet and outlet for the piping connection.It is recommended that a union be placed on either side ofthe time delay for ease of removal.
In a CO 2 system the pneumatic time delay must be placedafter the Master cylinder(s) and before the slave cylinder(s)connection(s) in the manifold. Refer to the typical arrange-ment drawings for installation con�guration.
P/N C70-235 (30 sec. delay)P/N C70-237 (60 sec. delay)
UL - Ex 4447ULC - CEx 1312FM - 3002238USCG - 162.161/2/0 (HFC-227ea)USCG - 162.038/12/0 (CO 2)
4 1/4"
22 1/4"
17"
TYP. 4 PLCS.
9/32" DIA
3 1/2" MAX(89 mm)
(565 mm)
(432 mm)
(7 mm)
6"(152 mm)
5 1/2"(140 mm)
(108 mm)
2"(51 mm)
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Half-inch Header Safety
Page 1 of 1 51-0156-0200
Safety Nut
Safety Disc
Safety Washer
Body
1/2" N
Bursting Pressure2650 to 3000 PSI
7/8" Hex
Part Number: 96060276
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Selector Valves
Page 1 of 1 51-0111-0109
DescriptionSelector or directional valves allow the use of a single group
of cylinders to protect multiple areas or hazards. These valves
act as blocking devices directing the fl ow of CO2 to the pro-
tected space. Valve sizes range from ½" (13 mm) to 4" (102
mm) outlet sizes.
Valves are provided with a screwed inlet and outlet connec-
tion. 3" and 4" valves have a fl anged connection on both.
¼" — 18 NPT Pilot pressure outlet
Seal Retainer Rings
Piston Seals
Pushrod416 SST
Body: Leaded redbrass, ASTM 4A
(85-5-5)
Bottom Cap:Cast brass Spring O-ring
Disc Holder:Brass, ASTM B16Alloy UNS C36000
Seat Disc
Pipe
¼" — 18 NPT Pilot pressure outlet
Top Cap: ForgedBrass, ASTM A124
Piston: Brass, ASTM B16Alloy UNS C36000
O-ring
Nut
Disc Nut
Flow
Ordering Information 9630610047 Selector Valve, ½ inch (13 mm), screwed9630610048 Selector Valve, ¾ inch (19 mm), screwed9610610371 Selector Valve, 1 inch (25 mm), screwed9610610369 Selector Valve, 1½ inch (38 mm), screwed9610610370 Selector Valve, 2 inch (51 mm), screwed9610610733 Selector Valve, 3 inch (76 mm), fl anged9610610734 Selector Valve, 4 inch (102 mm), fl anged9620480482 Actuation Kit for Selector Valves with manual actuation.96060347 Selector/Stop Valve, ½-¾" brass, R1 type
Hig
h Pr
essu
re C
O2 F
ire P
rote
ctio
n
7619
Ham
ilto
n A
ve,
Cin
cinn
ati,
Oh
4523
1Te
leph
one
+1
513
729-
2473
Fax
+1
513
729-
3444
Web
site
tom
cofi
resy
stem
s.co
mPa
ge 1
of 1
51-0
134-
0899
In-li
ne C
heck
Val
ves
SEC
TIO
N A
-A
PORT
'B'
PORT
'A'
Nom
inal
Siz
e
(inc
hes)
Por
t A
(IN
)
NP
T
Por
t B
(OU
T)
NP
T
Len
gth
L
(inc
hes)
Dim
ensi
on W
(inc
hes)
A/F
Par
t
No.
½½
¾3.
381.
5096
0601
40
¾¾
13.
401.
6396
0603
28
11
1¼3.
752.
096
0603
27
1¼1¼
1½4.
132.
596
0603
26
1½1½
24.
553.
096
0603
25
22
2½5.
823.
6396
0603
23
AA
'L'
'W'
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Page 1 of 1 51-0102-0304
Pressure Operated Switch
Tube x N.I.P. Fitting
If additional switchesor release trips are required,install Tee and branch toother units.
Tube x N.I.P. Fitting
3/16" or 1/4" o.d.x 0.32" wall tube
Pipe tonozzles
Pipe fromcylinders
Typical installationusing copper tubing
Mounting and applicationThe switch may be mounted in any position, but the preferred installation is with the pressure connection (gas supply line) entering from the bottom.
Installation can be made using 1/4" steel pipe and fi ttings. Alternately, 1/4" or 3/16" x .032" wall soft copper tubing with swagelock or equal fi ttings can be used.
Note: When the line load is greater than the switch rating, the switch should be used to break a relay holding coil circuit (relay supplied by others).
TestingTo test the circuits and to ensure auxiliary functions operate correctly:
Either..
1. Disconnect the union at the pressure connection, insert a small rod into the pressure connection of the cover plate, and push against the piston to trip the switch. Push the plunger down to reset the switch.
Or...
2. Remove the four cover screws and swing the cover away from the switch box. Manually operate the interior toggle switch. After testing, ensure the toggle is mounted in the normal standby position, then reinstall the cover plate.
Pressure Switch, Part No. 96060247Double pole, double throw
Rating: 15 Amps, 120 Vac per pole 8 amps, 240 Vac per pole 1 HP, 120 Vac, 5 phase
Finish: Cadmium plated weatherproof enclosure
Pressure switches can be used to shut down motors, pumps, fans, or operate alarms, release doors, or provide confi rmation of extinguishment system operation, etc. automatically when the extinguishing system discharges.
The pressure connection of the switch can be connected to the discharge piping of any cylinder in the system, or to the nitrogen actuation tubing, if used. 1 1/4 in
Operated Position
Reset Plunger(raised positionindicates theswitch hasoperated.
Name Plate
Togle switch innormal "standby"position.
Piston
Cover Plate
1/4" NPT(Pressureconnection)
Moisture-proofjoint
Switch box
For ½" Electricconduit
2 1/4 in
1 3/4 in
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Bleeder Valve
Page 1 of 1 51-0168-0403
Part no. 96040343 This bleeder valve is installed in main and reserve cylinder manifolds to vent ac-
cidental check valve leakage during discharge of one cylinder bank. If unvented,
accumulated leakage pressure could cause actuation of the other cylinder bank.
The valve closes when manifold pressure reaches approximately 20 PSIG to
prevent agent loss under normal discharge conditions.
7/8" Hex
2-1/2"Vent
1/2" NPT
The lock-out valve is a manually operated valve used to inhibit the discharge of CO2 into an entire sys-tem or specific area of a system. The valves are rated to a working pressure of 2,200psi WOG. The valve is equipped with a supervisory switch for remote monitoring and a locking device to pad lock the valve in the open or closed position. Material: Switch Rating: Body: Carbon Steel Housing: NEMA 4 Ball/Stem: Stainless Steel Contacts: 10a 24vDc/120vac/250vac Seats: RTFE Approval: FM Approvals FM Approvals has not verified the NEMA rating of the housing.
1/2” - 2” Lock-out Valve
Tomco Fire Systems 7619 Hamilton Avenue Cincinnati, OH 45231
Equipment Data Sheet 990920 Rev. 0 5/06
A B
C
LOCKING DEVICE
3/4" [19] NPT CONDUIT OPENING
POSITIONINDICATOR
D
EF
Refer to next page for dimensional information
1/2” - 2” Lock-out Valve
Tomco Fire Systems 7619 Hamilton Avenue Cincinnati, OH 45231
Equipment Data Sheet 990900 Rev. 0 5/06
Size Part Number
A B C D F
1/2” 990920 7 5/8” (194)
6 3/8” (162)
3” (76)
10 1/2” (267)
6 1/2” (165)
3/4” 990921 7 5/8” (194)
6 3/8” (162)
3 3/8” (86)
10 3/4” (273)
6 1/2” (165)
1” 990922 7 5/8” (194)
6 3/8” (162)
4” (102)
11 1/4” (286)
9 7/8” (251)
1 1/4” 990923 7 5/8” (194)
6 3/8” (162)
4 3/8” (111)
11 7/16” (291)
9 7/8” (251)
1 1/2” 990924 7 5/8” (194)
6 3/8” (162)
5” (127)
11 3/4” (299)
10 7/16” (265)
2” 990925 7 5/8” (194)
6 3/8” (162)
5 3/4” (146)
12 1/8” (308)
10 7/16” (265)
E
11 5/8” (296)
11 15/16” (303)
12 11/16” (322)
13 3/16” (335)
13 5/8” (346)
14 9/16” (370)
Weight
5.5 lbs 2.5 kg
7 lbs 3.2 kg
8.5 lbs 3.9 kg
11 lbs 5 kg
14 lbs 6.4 kg
21 lbs 9.5 kg
RED
BLUE
YELLOW
RED
BLUE
YELLOW
N.O.
N.C.
COM.
N.O.
N.C.
COM.
LOWER/CLOSE
UPPER/OPEN
CAMS
Switch Configuration
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
1.75
1/2" NPT
7/8 AF
Nozzle orficesized to suitsdesign requirement
Part Number: 96060237
Half inch Wall Nozzle for Total Flooding Applications
Page 1 of 1 51-0145-0899
Part Number: 96060237
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Pneumatic Siren
Page 1 of 1 51-0152-0997
Decibel Rating: 90 dBa @ 10' [3.05m]CO2 Consumption: 12lbs/min [5.5 kg/min]Materials: Housing: Brass Wheel: Stainless SteelPart Number: 990979Approval: FM Approvals
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Page 1 of 1 51-0100-0304
Pressure Release Trip
3 1/2"25/32"
1 1/2"
3 1/8"
Spring Piston
Stem
1/4" NPT pressure connection
Vent withrubber bung
2 mounting holes(3/8" dia.)
Re lease Tr ip, P art No. 96060246Body material: Cast brass
Tube X M.I.P . Fitting
OptionalAnti-vibration
Bracket
Extinguishingagent suppl y
To device operatedor released
Ty pical Connectio nRe lease T rip
to Discharge Piping
Notes These units are used to release dampers,
doors, windows, louvres, to open dump
valves, and to close fuel supply valves, etc.
automatically when agent discharges.
The equipment to be operated must be weight
or spring loaded, or be pivoted off-centre.
The pressure connection of the trip can be
connected to the discharge piping of any
cylinder in the system, to the rid valve pilot
tubing, or to the nitrogen actuation tubing.
The maximum load that can be hung on the
piston stem is 76 lb. (34 kg).
Connection can be made in 1/4" steel pipe,
1/4" or 3/16" x .032" wall soft copper tube.
Swagelok, Gyrolok, or similar fi ttings are
recommended for tube connections.
If additional release trips or pressure switches
are required, install branch tees to suit.
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Remote Manual Control Application
Page 1 of 1 51-0108-0304
Installation Notes 1. Run cable in 1/2" EMT conduit or 3/8" diameter pipe.
2. Install a corner pulley at each change in direction of cable.
3. Covers of corner pulleys must be accessible after installation to allow removal for installa-
tion of cable.
4. Remote manual pull box should be installed three to fi eve feet above fl oor level in a readily
accessible location, and in the main egress from the protected space.
5. Ensure space in front of pull box will allow a straight pull of approximately nine inches.
6. Before starting to install the cable, ensure the safety pin is installed in the actuator(s). Re-
move the safety pin after completion of cable installation.
7. Maximum length of 1/16" stainless steel cable that can be installed is 500 feet.
8. Maximum number of pulleys that can be used:
a) on a single run is 15.
b) on a double run arrangement is 18, with a maximum of nine on any one leg.
Installation N Notes 1. Run cable in 1/2" EMT conduit or 3/8" diameter pipe.
2. Install a corner pulley at each change in direction of cable.
3. Covers of corner pulleys must be accessible after installation to allow re
tion of cable.
4. Remote manual pull box should be installed three to fi eve feet above fl o
accessible location, and in the main egress from the protected space.
5. Ensure space in front of pull box will allow a straight pull of approximately
6. Before starting to install the cable, ensure the safety pin is installed in th
move the safety pin after completion of cable installation.
7. Maximum length of 1/16" stainless steel cable that can be installed is 50
8. Maximum number of pulleys that can be used:
a) on a single run is 15.
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��������������������
��������������������
FOR FIREOPEN DOOR
PULL HANDLE HARD
������������
������������
FOR FIREOPEN DOOR
PULL HANDLE HARD
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30° max.
9" min. clear(typical)
ConnectingLink
Cable Clamp Conduit Bracket& Fitting
90° Corner Pulley
To Pull Box
1/16" dia.StainlessSteel Cable
Lever-operated Actuator
Conduit Bracket& Fitting
½" Conduitor 3/8" Pipe
To Cylinder ValveActuator
Pull Boxes
SingleActuationfrom twoPull Boxes
Alternatively, actuation of twoseparate devices (i.e.: cylindervalve and selector valve) froma single pull box.
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Remote Manual Control Components
Page 1 of 1 51-0109-0304
2 11/16"
1 1/8"
4"
1" 2"1 3/4"
7/8"
"A"(See table)
3/8" diametermounting holes
3/4"3/8"
1/2"
3/8" diameter mounting holes
16 1/2"
1" (max.)9" (min.)
Direction of pull(see note)
Note: to pull in the opposite direction, reverse the two boxed dimensions.
33/8"
21/4
FOR FIREOPEN DOOR
PULL HANDLE HARD
FOORR FIIIRRRRRRRREEEEEEOPPEENENENNNNNNNN DD DDOOOOOOOORRRRRRR
PUULLLLL HHAAAAANNDDLDLDLDLDLDLLLLLLLLLEEEEEEE HHARDD
4 3/16"
4 1/8"
3/8" pipethread
15/16"diam .
1/2"1-7/16"
2 7/8 "
Provideadequate
clearance
for door to
open fully
90 º Corner PulleyPart No. 96060245
Cable ClampPart No. 96060012
Dual JunctionPart No. 96060256
Latch T ype Pull BoxPart No. 96060259
Conduit Brackets
Both holesthreaded for3/8" pipe
Two socketset- screws
Coverfasteningscrews
Lead and wire seal brokenwhen catch is opened
Two 3/16" diametercountersunkmountingholes
Base of pull boxwall mounted
Pullhandl e
Catch
Conduit Bracket Dimension "A" Used on...
96060257 1 3/4" Small cylinders up to 20 lbs.
96060248 2 1/2" Large cylinders more than 50 lbs.
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
S-Type Discharge Nozzle
Page 1 of 1 51-0146-0202
Installation withseal in place
Installationwithout seal
Orifice codestamped here
1/2" NPT
Flange setP/N 96060353
Nozzle assyP/N 96060291
Installationwith seal
without enclosure
Enclosure
SealP/N
96040504flanges
5/16 cap screw
5/16 nut
5/16 lockwasher
(To be replacedafter eachdischarge)
Height
ft.
Flow Rate
(lb per min.)
Area of
Coverage
(sq. ft.)
1 16 5.0
2 24 7.0
3 32 8.7
4 41 10.7
5 49 12.6
6 57 14.5
7 66 15.0
8 74 15.0
Nozzles up to and including #5 orifi ce are equipped with
strainers.
Materials: horn - steel ni pltd
insert & body - brass
fl anges - steel ni pltd
Flange set consists of two fl anges, seal, 3 nuts, bolts 7
washers. Ordered as a set.
Installation1. Cut a 3-5/8" dia. Hote in side of enclosure where
shown on system drawing. Drill three 3/8" holes for
cap screws using a clamping fl ange as a template.
2. If hazard is totally enclosed (i.e. In an air duct), cut a
hand hole adjacent to nozzle for access for nut and bolt
fi xing. (Cover hand hole after nozzle installation.)
Performance Data
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Vent Nozzle
Page 1 of 1 51-0169-0203
Nozzle orficesized to suit
design requirements
1/2" NPT
1/2" NPT
1.69in
1-1/8 AF
MATERIAL: BRASS
Part Number: 96060360
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Test Unit, 24 VDC Solenoid Valve
Page 1 of 1 51-0135-1099
Dummy Solenoid Coil
Attach connector cable here.
LED will light when solenoid
circuit is activated.
LEDLight Adapter
This unit is insensitive to polarity and is
equipped with VDR protection against overvol-
tages when switching off.
Hig
h Pr
essu
re C
O2 F
ire P
rote
ctio
n
7619
Ham
ilto
n A
ve,
Cin
cinn
ati,
Oh
4523
1Te
leph
one
+1
513
729-
2473
Fax
+1
513
729-
3444
Web
site
tom
cofi
resy
stem
s.co
m
Anc
hor
bolts
to b
ean
chor
edin
to s
olid
stru
ctur
e(b
y ot
hers
)N
ote:
Inst
all c
aptiv
e nu
ts in
bac
k be
ambe
fore
bea
m is
fast
ened
to w
all
Capt
ive
nut
9602
0085
Was
her,
960
2004
8Lo
ckw
ashe
r, 9
6020
084
Nut
, 960
2004
7
Typi
cal w
all f
aste
ning
Sect
ion
A-A
1-5/
8”Re
f
Show
ing
the
arra
ngem
ent f
oran
odd
num
ber o
f cyl
inde
rs
3/8"
thre
aded
rod
26-1
/2” l
ong,
9604
0470
3/8"
thre
aded
rod
14-1
/2”
long
9604
0469
, as
req’
d,a
Fron
t bea
m,
9605
0018
-XX
to s
uit t
heno
. of c
yl in
fron
t row
100
lb.
CO2
Cylin
der
Stee
l ang
le, 9
6050
019
Cap
scre
w, 9
6020
065
Was
her, 9
6020
048
Lock
was
her,
9602
0084
Capt
ive
nut,
9606
0085
Back
bea
m (2
)96
0500
16-X
X
3/8"
anc
hor b
olts
by
othe
rsPo
sitio
n 12
” to
24” a
part
avoi
ding
con
tact
with
cyl
inde
rs12
Ctr
s Re
f11
.0Re
f
10.0
Ref
2.7
Ref
A A
Sing
le B
rack
etSt
anda
rd In
dust
rial I
nsta
llatio
ns
Dou
ble
Brac
ket
Mar
ine
Inst
alla
tions
36"
(91c
m)
36"
(91c
m)
36"
(91c
m)
36"
(91c
m)
15”
(38
cm)
Page
1 o
f 151
-51-
1054
-109
7
Typi
cal B
rack
etin
g, D
oubl
e Ba
nk 10
0 lb
. Cyl
inde
rs
Not
es
1.
See
51-
1054
for
sin
gle
bank
.
2.
XX
of
the
part
no.
for
the
two
back
beam
s in
dica
tes
the
num
ber
of c
ylin
-
ders
bet
wee
n th
em.
3.
XX
of
the
part
no.
for
the
fron
t bea
m
indi
cate
s th
e nu
mbe
r of
cyl
inde
rs
cont
aine
d by
the
beam
.
4.
Des
ign
is b
ased
upo
n th
e us
e of
1-5/
8” te
chni
stru
t bea
ms
and
com
po-
nent
s, o
r si
mil
ar.
5.
Par
t no.
for
the
com
plet
e m
odul
e is
51-1
055-
XX
, whe
re X
X r
epre
sent
s
the
tota
l no.
of
cyli
nder
s.
Har
dwar
e re
quir
ed f
or tw
o ba
nk s
et-u
pTo
tal n
o. o
f cy
lind
ers
45
67
89
1011
12R
od, 1
4-1/
2", 9
6040
469
01
01
01
01
0R
od, 2
6-1/
2", 9
6040
470
11
22
33
44
5A
ngle
, 960
5001
94
44
44
44
44
Cap
tive
nut
, 960
2008
55
66
77
88
99
Pla
in n
ut, 9
6020
047
35
68
911
1214
15P
lain
was
her,
9602
0048
79
1012
1315
1618
19L
ockw
ashe
r, 96
0200
847
910
1213
1516
1819
Cap
scr
ew, 9
6020
065
44
44
44
44
4
Hig
h Pr
essu
re C
O2 F
ire P
rote
ctio
n
7619
Ham
ilto
n A
ve,
Cin
cinn
ati,
Oh
4523
1Te
leph
one
+1
513
729-
2473
Fax
+1
513
729-
3444
Web
site
tom
cofi
resy
stem
s.co
m
Tim
e D
elay
if re
quire
dP/
N 9
6060
345
Mas
ter
Mas
ter
Slav
eSl
ave
Act
uato
rP/
N 9
6060
235
Pres
sure
Sw
itch
if re
quire
d
Sire
nsin
pro
tect
edar
ea
Dis
char
geA
dapt
erP/
N 9
6042
99
1/8"
pip
eor
3/1
6" c
oppe
r tub
e
10 lb
CO
2 Cy
linde
r(o
r siz
e to
sui
t)
Act
uato
r
Sole
noid
Stan
dard
Pipe
Uni
on
3/4"
NPT
To N
ozzl
es
Act
uato
rif
Req
uire
dP/
N 9
6060
348
Stop
Val
veif
requ
ired
P/N
960
6034
7
Ada
pter
if R
equi
red
P/N
960
4049
9
3/4"
NPT
Page
1 o
f 151
-51-
1064
-040
2
© C
opyr
ight
200
8 in
Cont
rol S
yste
ms a
nd A
utom
atio
n. A
ll rig
hts r
eser
ved
Typi
cal I
nsta
llatio
n w
ith G
as O
pera
ted
Sire
ns
Hig
h Pr
essu
re C
O2 F
ire P
rote
ctio
n
7619
Ham
ilto
n A
ve,
Cin
cinn
ati,
Oh
4523
1Te
leph
one
+1
513
729-
2473
Fax
+1
513
729-
3444
Web
site
tom
cofi
resy
stem
s.co
m
Chec
k Va
lve
Man
ifold
Ble
ed V
alve
P/N
960
6034
3
Man
ifold
Hea
der S
afet
yP/
N 9
6060
276
Sele
ctor
Va
lve
see
deta
il ‘A
’ bel
ow
Sele
ctor
Sole
noid
Valv
e
Det
ail '
A'
Mai
n CO
2 Su
pply
Rese
rve
CO2
Supp
ly
Zone
1Zo
ne 2
Zone
3
Chan
ge -
Ove
r Sw
itch
P/N
960
6023
5
Zone
sele
ct
Pres
sure
Sw
itch
P/N
990
119
(opt
iona
l)
Act
uatio
n Ki
tP/
N 9
6060
335
See
also
Dat
a Sh
eet
No.
51-
1052
Mas
ter
Mas
ter
Slav
eSl
ave
Slav
eSl
ave
Mas
ter
Cylin
der
Ass
embl
y
Mas
ter
Cylin
der
Ass
embl
y
Slav
eCy
linde
rA
ssem
bly
Slav
eCy
linde
rA
ssem
bly
Slav
eCy
linde
rA
ssem
bly
Slav
eCy
linde
rA
ssem
bly
Mas
ter
Mas
ter
Slav
eSl
ave
Slav
eSl
ave
Mas
ter
Cylin
der
Ass
embl
y
Mas
ter
Cylin
der
Ass
embl
y
Slav
eCy
linde
rA
ssem
bly
Slav
eCy
linde
rA
ssem
bly
Slav
eCy
linde
rA
ssem
bly
Slav
eCy
linde
rA
ssem
bly
Page
1 o
f 151
-51-
1059
-100
1
Typi
cal J
oint
Sys
tem
with
Mai
n an
d Re
serv
e Cy
linde
rs
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
CO2 Pressure/Temperature Curve
Page 1 of 1 51-0140-0997
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
-10
-20
-30
-40
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800
Tem
pera
ture
: Deg
rees
Fah
renh
eit
Pressure: Lbs. per Square Inch
58% Filling
55% Filling
60% Filling
64-65% Filling
68% Filling
This curve shows the pressure in carbon dioxide cylinders at various tem-
peratures when fi lled to a percentage of their water capacity.
In general, cylinders should not be fi lled to more than 68% or less than 60%
of their water capacity. Cylinders currently supplied by inControl fi re are
fi lled to 68% of their water capacity.
Percent fi lling = Lb. CO2 in cylinder
x 100
Lb. water capacity of cylinder
High Pressure CO2 Fire Protection
7619 Hamilton Ave,Cincinnati, Oh 45231
Telephone+1 513 729-2473
Fax +1 513 729-3444
Websitetomcofi resystems.com
Warning Signs
Page 1 of 1 51-0149-0997
WARNINGCarbon dixide gascan cause injury ordeath.When alarm operates,do not enteruntil ventilated.
CAUTIONCarbon dixide gascan cause injury ordeath. Ventilate thearea before entering. Ahigh carbon dioxide gasconcentration can occurin this area and cancause suffocation.
7"
[177.80]
10"
[254.00]
Ø1/8" [Ø3.18]
CAUTIONCarbon dixide gas cancause injury or death.Carbon dioxide gasdischarge into nearby space can collect here.When alarm operatesvacate immediately.
WARNINGCarbon dixide gascan cause injury ordeath.When alarm operates,vacate immediately.
Part Number: 990491 Part Number: 990493
Part Number: 990492 Part Number: 990495
Hig
h Pr
essu
re C
O2 F
ire P
rote
ctio
n
7619
Ham
ilto
n A
ve,
Cin
cinn
ati,
Oh
4523
1Te
leph
one
+1
513
729-
2473
Fax
+1
513
729-
3444
Web
site
tom
cofi
resy
stem
s.co
mPa
ge 1
of 1
51-5
1-10
54-1
097
Typi
cal B
rack
etin
g, S
ingl
e Ba
nk 10
0 lb
. Cyl
inde
rs
Plan
Vie
w
Capt
ive
nut
9602
0085
NO
TE:
Inst
all c
aptiv
e nu
ts in
bac
k be
ambe
fore
bea
m is
fast
ened
to w
all
Was
her,
960
2004
8Lo
ckw
ashe
r, 9
6020
084
Nut
, 960
2004
7
Anc
hor b
olts
to b
e an
chor
edin
to s
olid
str
uctu
re
Sect
ion
A-A
Typi
cal
Wal
l Fas
teni
ng
1-5/
8Re
f
3/8"
Thr
eade
d ro
d14
-1/2
" lon
g96
0404
69
100
lb. C
O2
Cylin
der
Stee
l ang
le96
0500
19
Fron
t bea
m96
0500
18-X
X
Cap
scre
w, 9
6020
065
Was
her,
960
2004
8Lo
ckw
ashe
r, 9
6020
084
Back
Bea
m96
0500
16-X
X
3/8"
anc
hor b
olts
by
othe
rePo
sitio
n 12
” to
24” a
part
avoi
ding
con
tact
with
cyl
inde
rs12
Ctr
s Re
f 13
.3Re
f
10.7
Ref
2.7
Ref
A A
Sing
le B
rack
etSt
anda
rd In
dust
rial I
nsta
llatio
ns
Dou
ble
Brac
ket
Mar
ine
Inst
alla
tions
36”
(91
cm)
15”
(38
cm)
36"
(91c
m)
36"
(91c
m)
Not
es1.
X
X o
f be
am p
art n
o. in
dica
tes
the
num
ber
of
cyli
nder
s.
2.
Des
ign
is b
ased
upo
n th
e us
e of
1-5
/8”
tech
nis-
trut
bea
ms
and
com
pone
nts,
or
sim
ilar
.
No.
of
piec
es r
equi
red
for
sing
le b
ank
set-
up
No.
of
cyli
nder
s2
34
56
78
910
Rod
, 14-
1/2"
, 960
4046
91
23
45
67
89
Ang
le, 9
6050
019
22
22
22
22
2
Cap
tive
nut
, 960
2008
53
45
67
89
1011
Pla
in n
ut, 9
6020
047
23
68
1012
1416
18
Pla
in w
ashe
r, 96
0200
484
68
1012
1416
1820
Loc
kwas
her,
9602
0084
46
810
1214
1618
20
Cap
scr
ew, 9
6020
065
22
22
22
22
2
Tomco2 Fire Systems System Design 8/16/10 Rev. 0
SECTION 3
SYSTEM DESIGN
Table of Contents Paragraph Subject 3-1 General 3-2 Total Flood System Design 3-3 Local Application System Design
Tomco2 Fire Systems System Design 8/16/10 Rev. 0
3-1
SECTION 3
SYSTEM DESIGN
3-1 GENERAL
This section is provided as a guide in designing a high pressure CO2 fire extinguishing system. The two major types of systems covered in this section are total flooding and local application.
3-2 TOTAL FLOOD SYSTEM DESIGN
A. A total flooding system consists of a fixed supply of carbon dioxide connected to a piping network with fixed nozzles that discharge into an enclosed space. This type of system may be used whenever an enclosure exists about the hazard. The enclosure must be adequate to contain the discharge of agent to achieve the required carbon dioxide concentration. Figure 3-1 illustrates a total flood design process.
B. Fires which can be extinguished by total flooding methods may be divided into two
categories:
1. Surface fires involving flammable liquids, gases and solids. 2. Deep seated fires involving solids subject to smoldering.
C. Surface fires are the most common hazard and are usually subject to prompt
extinguishment when carbon dioxide is quickly introduced into the enclosure in sufficient quantity.
D. For deep-seated fires, the required extinguishing concentration shall be maintained for
a sufficient period of time to allow the smoldering to be extinguished and the material to cool to a point to prevent re-ignition.
Tomco2 Fire Systems System Design 8/16/10 Rev. 0
3-2
SYSTEM DESIGN PROCESS
TOTAL FLOODING
Caution: This design criteria is for enclosure temperature only.
Figure 3-1
Total Flood Design Process
Tomco2 Fire Systems System Design 8/16/10 Rev. 0
3-3
3-2.1 Quantity Calculations for Surface Fires A. Section 5-3 of NFPA Standard 12 2005 gives the guidelines for determining the
quantity of carbon dioxide quantities for surface fires. B. The minimum design concentration of carbon dioxide required in no case shall
be less than 34%.
C. Table 3-1 lists the minimum design concentrations required for extinguishment of some common liquids and gases.
Tomco2 Fire Systems System Design 8/16/10 Rev. 0
3-4
Material Minimum Design CO2
Concentration (%) Acetylene 66 Acetone 34 Aviation Gas Grades 115/145 36 Benzol, Benzene 37 Butadiene 41 Butane 34 Butane 1 37 Carbon Disulfide 72 Carbon Monoxide 64 Coal or Natural Gas 37 Cyclopropane 37 Diethyl Ether 40 Dimethyl Ether 40 Dowtherm 46 Ethane 40 Ethyl Alcohol 43 Ethyl Ether 46 Ethylene 49 Ethylene Dichloride 34 Ethylene Oxide 53 Gasoline 34 Hexane 35 Higher Paraffin Hydrocarbons 34 Hydrogen 75 Hydrogen Sulfide 36 Isobutane 36 Isobutylene 34 Isobutyl Formate 34 JP - 4 36 Kerosene 34 Methane 34 Methyl Acetate 35 Methyl Alcohol 40 Methyl Butane 1 36 Methyl Ethyl Ketone 40 Methyl Formate 39 Pentane 35 Propane 36 Propylene 36 Quench, Lube Oils 34
Note: The theoretical minimum extinguishing concentrations in air for the above materials
were obtained from a compilation of Bureau of Mines Limits of Flammability of Gases and Vapors (Bulletins 503 and 627).
Table 3-1
Minimum Carbon Dioxide Concentrations for Extinguishment (TABLE 5.3.2.2 from NFPA 12 2005)
Tomco2 Fire Systems System Design 8/16/10 Rev. 0
3-5
D. In figuring the net cubic volume to be protected, the volume of permanent, non-removable, impermeable structures may be subtracted from the gross volume to be protected, however, this allowance is not recommended.
E. In two or more interconnected volumes where "free flow" of carbon dioxide can
take place, the carbon dioxide quantity shall be the sum of the quantities for each volume, using its respective volume factor from table 3-2. If one volume requires greater than 34% concentration, the higher concentration shall be used in all interconnected volumes.
Volume of Space Volume Factor Calculated Quantity
(ft3 Incl.) (ft3/lb. CO2) (lb. CO2/ft3) Not Less Than
Up to 140 14 .072 ---- 141 500 15 .067 10 501 1,600 16 .063 35
1,601 4,500 18 .056 100 4,501 50,000 20 .050 250 Over 50,000 22 .046 2,500
Table 3-2
Flooding Factors For 34% Concentration (Table 5.3.3(a) NFPA 12 2005)
3-2.2 Material Conversion Factor
For materials requiring a design concentration over 34%, the basic quantity of carbon dioxide calculated from the volume factor given in table 3-2 shall be increased by multiplying this quantity by the appropriate conversion factor given in table 3-3.
4
3
2
130 34 40 50 60 70 80 90
Minimum Design CO2 Concentration - %
Conversion Factor
Table 3-3 Material Conversion Factors (Table 5.3.4 NFPA 12 2005)
Tomco2 Fire Systems System Design 8/16/10 Rev. 0
3-6
3-2.3 Special Conditions A. Additional quantities of carbon dioxide shall be provided to compensate for any
special condition that may adversely affect the extinguishing efficiency. B. Any openings that cannot be closed at the time of extinguishment shall be
compensated for by the addition of a quantity of carbon dioxide equal to the anticipated loss at the design concentration during a one (1) minute period. This amount of carbon dioxide shall be applied through the regular distribution system. See 5.4.4.1 of NFPA Standard 12 2005.
C. For ventilating systems which cannot be shut-down, additional carbon dioxide
shall be added to the space through the regular distribution system in an amount computed by dividing the volume moved during the liquid discharge period by the flooding factor. This shall be multiplied by the material conversion factor determined in table 3-3 when the design concentration is greater than 34%.
D. For applications where the normal temperature of the enclosure is above 200º F
(93º C), a 1% increase in the calculated total quantity of carbon dioxide shall be provided for each additional 5º F (-15º C) above 200º F (93º C).
E. For applications where the normal temperature of the enclosure is below 0º F
(-18º C), a 1% increase in the calculated total quantity of carbon dioxide shall be provided for each degree below 0º F (-18º C).
F. Under normal conditions, surface fires are usually extinguished during the
discharge period. Except for unusual conditions, it will not be necessary to provide extra carbon dioxide to maintain the concentration.
G. A flooding factor 8 ft3/lb. shall be used in ducts and covered trenches. If the
combustibles represent a deep-seated fire, it shall be treated as described in section 3.2.4.
3-2.4 Quantity Calculations for Deep Seated Fires
The quantity of carbon dioxide for a deep-seated type fire is based on a fairly tight enclosure. After the design concentration is reached, the concentration shall be maintained for a substantial period of time, but not less than 20 minutes. Any possible leakage shall be given special consideration since no allowance is included in the basic flooding factors.
3-2.5 Combustible Materials A. For combustible materials capable of producing deep-seated fires, the required
carbon dioxide concentrations cannot be determined with the same accuracy possible with surface burning materials. The extinguishing concentration will vary with the mass of material present because of the thermal insulating effects. Flooding factors have therefore been determined on the basis of practical test conditions.
B. The design concentrations listed in table 3-4 shall be achieved for the hazards
listed. Generally, the flooding factors have been found to provide proper design concentrations for the rooms and enclosures listed.
Tomco2 Fire Systems System Design 8/16/10 Rev. 0
3-7
C. Flooding factors for other deep seated fires shall be justified to the satisfaction of the authority having jurisdiction before use. Proper consideration shall be given to the mass of material to be protected because the rate of cooling is reduced by the thermal insulating effects.
Design ft3/lb. m3/kg lbs. kg Specific Hazard Concentration % CO2 CO2 CO2/ft
3 CO2/m3
50 10 0.62 0.100 1.60 Dry electrical hazards in
general. (Spaces 0-2000 ft3) 50 12 0.75 0.083
(200 lb. minimum)
1.33 (91 kg
minimum)
Dry electrical hazards in general. (Spaces greater than 2000
ft3)65 8 0.50 0.125 2.00 Record (bulk paper) storage,
ducts and covered trenches. 75 6 0.38 0.166 2.66 Fur storage vaults, dust
collectors.
Table 3-4 Flooding Factors for Specific Hazards
(Table 5.4.2.1 NFPA 12 2005)
D. For deep seated fires the design concentration shall be achieved within 7
minutes as specified in Paragraph 5.5.2.3 of the NFPA Standard 12 2005. In addition to the basic quantity, any leakage or temperature factors must be added. The discharge rate shall develop a concentration of 30% that must be achieved within 2 minutes. To develop the 30% concentration within 2 minutes a flooding factor of 0.043 lbs/fr3 should be used.
3-2.6 Estimated Flow Rate Calculations
A. The problem encountered in flow rate calculations is complicated by the physical
characteristics of carbon dioxide. The agent leaves the storage tank as a liquid at saturation pressure (850 psig @ 70º F).
B. As the temperature of the liquid increases as it flows through the discharge
piping, the liquid CO2 begins to vaporize producing a mixture of liquid and vapor. As the pressure increases, the density of the vapor over the liquid increases. On the other hand, the liquid expands as the temperature goes up and its density decreases. This phenomenon reduces the density of the agent and results in an increase in the flow velocity.
C. Since the flow rate for the vapor phase is considerably less than the flow rate for
the liquid phase, compensation must be made during the calculation of the actual flow rate.
3-2.7 Nozzle Placement Guide A. Tomco2 Fire Systems uses both wall, vent or s-type discharge nozzles for total
flood hazards. All of these types of nozzles have proven to be effective in providing a uniform concentration throughout the hazard enclosure.
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B. The wall nozzle usually creates a high velocity discharge that provides a
thorough mix of CO2 throughout the entire enclosure. S-type nozzles are usually used when a slower more "cushioned" discharge is required in areas such as computer rooms, sub-floor areas or records vaults where a high velocity discharge could seriously damage the contents. Vent nozzles are typically used in small spaces, such as duct work.
C. It is not necessary to place the nozzles directly at the ceiling level. In
applications where obstructions are encountered at the ceiling level, the nozzles should be installed lower than these obstructions. In no case should the nozzles be installed less than 3' above the highest object within the protected enclosure.
D. A full discharge test shall be conducted on all systems. The coverage of nozzles
in the actual installation will be verified by this test except when waived by the authority having jurisdiction. More often the area of coverage per nozzle will be reduced from the above recommended maximums due to:
1. Inability of single nozzle to deliver the required flow rate to flood the
maximum area. 2. Consideration of obstructions within the hazard that require additional
nozzles to cover the space on both sides of the obstruction. 3. The hazard contains delicate or fragile materials that might be damaged by a
highly turbulent discharge.
Table 3-5 Nozzle Spacing
E. The particular shape or the contents of a hazard may also necessitate a greater number of nozzles than what is shown on the above chart.
F. The wall nozzle can be used in most total flood applications. Maximum spacing
shall not exceed 16ft. G. Wall nozzles should not be used for protecting ducts, pits or covered trenches. H. In special applications requiring a low velocity discharge, s-type nozzles usually
associated with local application may be used in total flooding systems and should not exceed a maximum side dimension of 16 feet.
I. Protection of any unusual shaped volumes or excessive ceiling heights should be
directed to Tomco2 Fire Systems.
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3-3 LOCAL APPLICATION SYSTEM DESIGN
3-3.1 General A. A local application system consists of a fixed supply of carbon dioxide
permanently connected to a system of fixed piping with nozzles arranged so as to discharge the agent directly onto the hazard.
B. Local application systems are used for the suppression of surface fires in
flammable liquids, gases and shallow solids where the hazard is not enclosed or where the enclosure does not conform to the requirements for total flooding. Examples of hazards that may be protected by local application systems include dip tanks, quench tanks, spray booths, machining operations and printing presses. Figure 3-2 illustrates a local application design process.
C. A discharge test must be conducted to verify complete coverage of the hazard
based on nozzle placement.
D. To determine the nominal cylinder storage capacity for all local application systems, the computed quantity of carbon dioxide shall be increased by 40% to compensate for the vapor phase of discharge. Only the liquid portion of the discharge is effective.
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LOCALAPPLICATION
SURFACEWETTED
SURFACELIQUID
NOZZLEPLACEMENT
ANALYSISHAZARD
NOZZLEFLOW RATE
AGENTQUANTITY
HYDRAULIC
DETECTION
CALCULATIONS(NOZZLEORIFICE
CODES ANDPIPE SIZES)
ANDACTUATIONEQUIPMENT
Figure 3-2 Local Application Design Process
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3-3.2 Types of Surface Fires A. Within the scope of this manual, two types of surfaces must be considered:
liquid surfaces and wetted or coated surfaces. The liquid surface is that surface of deep layer of flammable liquid usually more than 1/4" in depth that is exposed to the atmosphere. Wetted or coated surfaces are defined as those designed for drainage which are constructed and maintained so that no pools of liquid usually less than 1/4" in depth and will accumulate over a total area exceeding 10% of the protected surface. This does not apply where there is a heavy buildup of residue.
B. National Fire Protection Association NFPA 12 Standard For Carbon Dioxide
Systems and FM Global Property Loss Control Data Sheets should be referenced when determining the suitability of a hazard for the local application method of protection.
3-3.3 Duration of Discharge
The minimum effective discharge time for computing quantity of agent shall be 30 seconds of liquid discharge at the nozzles. Where there is a possibility that metal or another material may become heated above the ignition temperature of the fuel, the effective (liquid) discharge time shall be increased to permit adequate cooling of the material. Special fuels such as paraffin wax or cooking oil require a minimum discharge time of 3 minutes because the auto-ignition point is below its boiling point.
3-3.4 Methods of Application There are two accepted methods of calculating the quantity of CO2 required for local application systems. The RATE-BY-AREA METHOD is used where the fire hazard consists primarily of a flat surface or low level objects associated with horizontal surfaces. The RATE-BY VOLUME METHOD of system design is used where the fire hazard consists of three dimensional irregular objects that cannot easily be reduced to equivalent surface areas.
3-3.5 Rate-By-Area Method A. For rate-by-area local application systems, the quantity of CO2 required to protect
a hazard is based on the summation of the listed discharge rates from all individual nozzles. The discharge rate for each nozzle is determined by the distance from the surface to be protected to the nozzle. The discharge rate and distance from the protected surface to nozzle determines the maximum area which a nozzle can protect. The flow rates, area of coverage and height limitations are found in tables 3-8, 3-9, 3-10.
B. Overhead type nozzles shall be installed perpendicular to the hazard and
centered over the area protected by the nozzle. They may also be installed at angles between 45 degrees and 90 degrees from the plane of the hazard surface as described in table 3-7. The height used in determining the necessary flow rate and area coverage shall be the distance from the aiming point on the protected surface to the nozzle measured along the axis of the nozzle.
C. When installed at an angle, nozzles shall be aimed at a point measured from the
near side of the area protected by the nozzle, the location of which is calculated
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by multiplying the fractional aiming factor in table 3-7 by the width of the area protected by the nozzle.
D. If there is a physical limitation on the height of the nozzle above the protected
surface, this height limitation may determine the number and type of nozzles that must be used. If there are no restrictions on nozzle height, the minimum number of nozzles may be used based on the maximum allowable distance.
E. When coated stock or parts extend above a protected surface more than two feet
additional nozzles may be required to protect this stock. When determining the location of nozzles, considerations should be given for the possible affects of air currents, winds and forced drafts, as additional nozzles may be required.
3-3.6 Rate-By-Volume Method A. If a hazard is three dimensional in nature and cannot be easily reduced to
equivalent surface areas, rate-by-area protection is not recommended. For such three dimensional solid type hazards a rate-by-volume approach should be used when designing a local application system using the rate-by-volume method.
B. The total discharge rate of the system shall be based on the volume of an
assumed enclosure entirely surrounding the hazard. C. The assumed enclosure shall be based on an actual closed floor unless special
provisions are made to take care of bottom conditions. D. The assumed walls and ceiling of this enclosure shall be at least 2 ft (0.6 m) from
the main hazard unless actual walls are involved and shall enclose all areas of possible leakage, splashing or spillage.
E. No deductions shall be made for solid objects within this volume. F. A minimum dimension of 4 ft (1.2 m) shall be used in calculating the volume of
the assumed enclosure. G. If the hazard may be subjected to forced drafts, the assumed volume shall be
increased to compensate for losses on the windward sides. H. Calculation of the system discharge rate and quantity of CO2 required is based
on the volume of an assumed enclosure surrounding the hazard. The assumed enclosure is based on the presence of a closed floor under the hazard. The assumed enclosure is at least two feet in all directions from the actual hazard. The basic system discharge rate is then calculated using one lb. per min. per cubic foot of assumed volume.
I. Location and Number of Nozzles. A sufficient number of nozzles shall be used
to adequately cover the entire hazard volume on the basis of the system discharge rate as determined by the assumed volume.
J. Nozzles shall be located and directed so as to retain the discharged carbon
dioxide in the hazard volume by suitable cooperation between nozzles and objects in the hazard volume.
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K. Nozzles shall be located so as to compensate for any possible effects of air
currents, or forced drafts. 3-3.7 Rate-By-Volume Partial Enclosure
A. If the assumed enclosure has a closed floor and is partly defined by permanent
continuous walls extending at least 2 ft. above the hazard (where the walls are not normally part of the hazard) the discharge rate may be proportionately reduced to not less than 0.25 lbs./min./cu. ft. (NFPA 12 2005 paragraph 6.5.3.2)
B. Refer to figure 3-3 to determine the allowable flow rate reduction for a hazard
with a partial enclosure.
% PERIMETER ENCLOSED
0
.25
25
50
.75
LBS/MIN/CU FT
.375
.4.425.45
.50
.475
.625 1.0.875
75
100
RATE BY VOLUMEMATHEMATICAL METHODFACTOR = [% PERIMETER OPEN
(EXPRESSED AS A DECIMAL)x .75] + .25
Figure 3-3 Partial Enclosure Flow Rate Reduction per NFPA 12
Discharge Angle (1) Aiming Factor (2) 45-60 1/4 60-75 1/4-3/8 75-90 3/8-1/2
90 (Perpendicular) 1/2 (Center)
Note: (1) Degrees from plane of hazard surface. (2) Fractional amount of nozzle coverage side-of-square.
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Example:
Note: Distance “X” and the flow rate are the same in both examples, only the aiming point for the nozzle changes.
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SECTION 4
INSTALLATION
Table of Contents Paragraph Subject 4-1 General 4-2 Pipe and Fittings 4-3 Welding Connections 4-4 Tubing Connections 4-5 Pipe Hangars and Bracing 4-6 Expansion Joints 4-7 Cylinder Assemblies 4-8 Installation of Cylinders 4-9 Installation of Pipe and Fittings 4-10 Installation of Nozzles 4-11 Local Manual Control 4-12 Remote Cable Manual Control 4-13 Solenoid Actuator 4-14 Discharge Pressure Switch 4-15 Pressure Release Trip 4-16 System Verification and Testing 4-17 Inspection for Mechanical Integrity 4-18 Pressure and Leak Test 4-19 Pipe Sleeves 4-20 Pneumatic Time Delay
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SECTION 4
INSTALLATION
4-1 GENERAL
This specification is to be used as a minimum standard for installation of piping, supports, hangers and system components. If the requirements of local, national codes or the authority having jurisdiction are more stringent, these more stringent requirements shall take precedence. Installation shall be performed in a workman like manner according to the highest standards. A. All pipe and fittings shall be new and of recent manufacture. B. All pipe shall be reamed after cutting so that all burrs and sharp edges are removed. C. All pipe shall be blown clean and swabbed thoroughly with solvent inside before
installation to remove foreign matter and oil. Some effective solvents are trichlorethylene, perchlorethylene or trichlorethane.
D. All pipe and fittings installed outdoors or in corrosive areas should be galvanized or
coated with a proper rust inhibitor. E. All screwed pipe shall be coated with Teflon tape or an approved pipe joint compound.
Coating of the threads must start at least two threads back from the pipe end. 4-2 PIPE AND FITTINGS The following provides specifications for materials normally used. This includes the use of
other materials such as brass, copper, stainless steel, flexible hose, etc. provided that they satisfy the system pressure/temperature requirements (working pressure of 3,00 psi [207 bar]). Pipe and fittings should have a minimum bursting pressure (not working pressure) of 5,000 psi (345 bar).
The project drawings will indicate the specific piping materials to be utilized for each project. As the type of piping material to be utilized are incorporated into the system flow/pressure loss design, the system designer must be contacted if materials other than those specified are used, and the designers approval must be received.
Ferrous Pipe Seamless or electric weld, black or galvanized steel pipe conforming to ASTM A-53, Grades A or B, ASTM A-106, Grades A,B or C Sizes: 1/4" through 3/4" Schedule 40 (standard) 1” through 4” Schedule 80 (extra heavy) Furnace butt weld ASTM-53 pipe, cast iron pipe, and pipe conforming to ASTM A-120 must not be used. Black pipe may be used when installed indoors and where moisture or corrosive atmospheres are not normally present. Where any portion of a piping system is outdoors or in an unheated area, that portion should be galvanized. Where galvanized pipe is used, galvanized fittings should be used.
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Ferrous Fittings Threaded 1/4" through 2”: Class 300 malleable iron, ASTM A-197, or ductile iron, ASTM A-394 2 1/2" and Larger: 3,000# forged steel Class 150 and cast iron fittings must not be used.
Pipe Connections Pipe can be assembled using threaded, flanged, or welded joints as specified on the project drawings. Threaded Connections All threaded joints should have American Standard pipe threads (NPT) in accordance with ANSI B2.1. All threads should be full length and suitably reamed and chamfered. After cutting and threading, pipe should be reamed and cleaned before assembly to remove all cutting oil, lacquer, scale and cuttings, using a degreasing solution run through the pipe interior. For assembly, use pip sealant applied to male thread only. Joints should be tightened until engagement conforms to that specified for tight joints using American Standard pipe threads. Normal engagements for tight joints are:
Pipe Size Engagement1/4" 3/8"3/8" 3/8"1/2" 1/2"3/4"" 9/16"1" 11/16"
1 1/4" 11/16"1 1/2" 11/16"
2" 3/4"2 1/2" 15/16"
3" 1"3 1/2" 1 1/16"
4" 1 1/8"5" 1 1/4"6" 1 5/16"
4-3 WELDED PIPE CONNECTIONS
When making welded connections, bevel type welding fittings should be installed and all welding should be performed in accordance with Section IX, Qualification Standard for Welding and Brazing Procedures, Welders, Brazer Operators, of the ASME Boiler and Pressure Vessel Code. During welding care must be taken to ensure that weld splatter and molten metal does not enter the pipe and that any roughness that could affect flow is removed.
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4-3
4-4 TUBE CONNETIONS
When using tube, compression type fittings are preferred. The pressure/temperature ratings of the manufacturer of the fitting should not be exceeded. When tube joints are soldered or brazed the melting point of the soldering metal should be at least 10,000°F.
4-5 HANGARS AND BRACING
All system piping, both vertical and horizontal, most be suitably supported with hangars conforming to the least requirements or ANSI B31.1. Pipe hangars should be capable of supporting the pipe under all conditions of operation and service. They should allow for the expansion and contraction of the piping, and should prevent pipe loads and stresses from being transmitted into connected equipment. Hangars and supports should be of rugged design and installed so that they will not be loosened by movement of the supported pipe. U-bolts with double nuts should be used. Pipes must be braced or anchored to the building structure such as beams, columns, concrete walls, etc., in order to prevent longitudinal and lateral movement and sway. Carbon dioxide piping must not be hung or supported form other piping systems (i.e. water, compressed air, etc.). Large forces are exerted on the system cylinders and piping during discharge. Each section of pipe must be braced or secured to restrict both the vertical and lateral movement. Where practical, riser piping should be supported independently of the connected horizontal piping. A support must be installed adjacent to each discharge nozzle and wherever a change in pipe direction occurs. In addition, for some regions classified as earthquake zones, or for projects such as nuclear sites subject to unique code requirements, special sway bracing and/or hangars may be required. Refer to project and/or contract drawings for requirements of special bracing. Generally, no section of pipe should be without a hanger or brace. Maximum spacing between hangars and hangar rod sizes should be indicated as shown, which are in accordance with ANSI B31.1.0.
Pipe Size Engagement Rod Size1/2" 5'3/4"" 6'1" 7'
1 1/4" 9'1 1/2" 9'
2" 10'2 1/2" 11'
3" 12'3 1/2" 13'
4" 14'5" 16'6" 17' 3/4"
Hangar Spacing
1/2"
5/8"
3/8"
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4-4
Intermediate Pipe Hanger
(Trapeze)
Pipe Size Rod Size1" and smaller 3/8"1-1/4" thru 3" 1/2"
4"& 5" 5/8"6" 3/4"
Rigid Pipe Hanger (Roof and Floor)
Pipe Size "A" Angle Size U-Bolt Dia.1" thru 2" 8" 1-1/2" x 1-1/2" x 1/4" 3/8"
2-1/2" thru 4" 12" 3" x 3" x 1/4" 1/2"5" & 6" 16" 3-1/2" x 3-1/2" x 3/8" 5/8"
Figure 4-13 Typical Pipe Supports
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4-5
Intermediate Pipe Hanger (Roof)
Letter 1" - 2" Pipe 2-1/2" - 4" Pipe 5" - 6" PipeA 6" 8" 10"B 10" 14" 18"C 1-1/2" 1-1/2" 1-1/2"D 3" 5" 7"E 1-3/4" 1-3/4" 1-3/4"F 13-1/4" 19-1/2" 24-3/4"
Angle Size 1-1/2" x 1-1/2" x 1/4" 3" x 3" x 1/4" 3-1/2" x 3-1/2" x 3/8"U-Bolt Dia. 3/8" 1/2" 5/8"Anchor Size 3/8" 1/2" 5/8"
Figure 4-14 Typical Pipe Supports
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Rigid Pipe Hanger (Wall)
Letter 1/2" - 3/4" Pipe 1" - 1-1/2" Pipe 1-1/2" - 2" PipeA 6" 9" 12"B 1-1/2" 3" 4"C 3" 4" 5"D 10" 14" 18"E 1-1/2" 2" 2-1/2"F 7" 10" 13"G 8-1/4" 12-3/4" 17"
Angle Size 1" x 1" x 3/16" 2" x 2" x 1/4" 3" x 3" x 3/8"U-Bolt Dia. 1/4" 3/8" 3/8"Anchor Size 1/4" 3/8" 1/2"
Figure 4-15 Typical Pipe Supports
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4-7
Rigid Pipe Hanger (Wall)
Letter 1" - 2" Pipe 2-1/2" - 4" Pipe 5" - 6" PipeA 8" 12" 16"B 12" 18" 20"C 2" 2" 2"D 7" 13" 15"E 5" 8" 11"F 9-1/4" 12-3/8" 17-1/2"
Angle Size 1-1/2" x 1-1/2" x 1/4" 3" x 3" x 1/4" 3-1/2" x 3-1/2" x 3/8"U-Bolt Dia. 3/8" 1/2" 5/8"Anchor Size 3/8" 1/2" 5/8"
Figure 4-16 Typical Pipe Supports
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Tank Capacity
(tons) Voltage Horsepower Phase Amps Fuse Wire
0.75 230 0.5 1 5.2 10 #12
1.5 230 0.5 1 5.2 10 #12
2 208/230 0.5 1 5.2 10 #12
3.75 208/230 1 1 9.8 15 #12
460 1 3 4.2 6 #12
6 208/230 1 1 9.8 15 #12
230 1 3 7.2 10 #12
460 1 3 4.2 5 #12
8 230 2 3 10.2 15 #12
460 2 3 6.2 10 #12
10 230 2 3 10.2 15 #12
460 2 3 6.2 10 #12
12 230 2 3 10.2 15 #12
460 2 3 6.2 10 #12
14 230 2 3 10.2 15 #12
460 2 3 6.2 10 #12
18 230 3 3 25.4 30 #10
460 3 3 12.5 15 #12
22 230 3 3 25.4 30 #10
460 3 3 12.5 15 #12
26 230 3 3 25.4 30 #10
460 3 3 12.5 15 #12
30 230 3 3 25.4 30 #10
460 3 3 12.5 15 #12
Consult factory for information regarding tank sizes larger than 30 tons. 4-6 EXPANSION JOINTS
A certain amount of contraction can occur, which is caused by a maximum temperature change in long continuous pipe runs. Approximately 1 inch per 100 feet of steel pipe. Often, as part of the natural layout of the system, a swing joint can serve to give the desired flexibility. In straight runs an expansion joint should be installed on the basis of one after approximately 100 feet of continuous run and after each 100 feet run thereafter.
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Note: Rigid hangers should be installed at all three (3) points noted above. However, the
tension on the ‘U’ bolts supporting the pipe to the hanger must be adjusted to allow longitudinal movement on either side of the loop.
PIPE DIM DIM PIPE DIM DIM SIZE H W SIZE H W 1/2" 1'-0" 5'-6" 3" 1'-0" 20'-0" 1/2" 2'-0" 1'-6" 3" 2'-0" 10'-0" 1/2" 3'-0" 0'-6" 3" 3'-0" 5'-0" 3/4" 1'-0" 8'-6" 3" 4'-0" 1'-0" 3/4" 2'-0" 3'-0" 3" 5'-0" 0'-6" 3/4" 3'-0" 1'-0" 4" 1'-0" 21'-6" 3/4" 4'-0" 0'-6" 4" 2'-0" 11'-6" 1" 1'-0" 10'-0" 4" 3'-0" 5'-0" 1" 2'-0" 3'-6" 4" 4'-0" 2'-0" 1" 3-0" 1'-0" 4" 5'-0" 0'-9" 1" 4'-0" 0'-6" 5" 2'-0" 13'-6"
1 1/4" 1'-0" 12'-0" 5" 3'-0" 6'-6" 1 1/4" 2'-0" 5'-0" 5" 4'-0" 2'-3" 1 1/4" 3'-0" 1'-0" 5" 5'-0" 0'-9" 1 1/4" 4'-0" 0'-6" 6" 2'-0" 14'-0" 1 1/2" 1'-0" 13'-6" 6" 3'-0" 7'-6" 1 1/2" 2'-0" 6'-0" 6" 4'-0" 2'-6" 1 1/2" 3'-0" 2'-0" 6" 5'-0" 1'-0" 1 1/2" 4'-0" 0'-6" 8" 2'-0" 14'-0"
2" 1'-0" 15'-6" 8" 3'-0" 9'-6" 2" 2'-0" 7'-6" 8" 4'-0" 3'-6" 2" 3'-0" 2'-6" 8" 5'-0" 1'-6" 2" 4'-0" 0'-6"
Figure 4-10
Estimating Guide for Expansion Loops
'H'
'W'
SUPPORTS PERMITTING
ANCHOR
PLAN VIEW
LONGITUDINAL MOVEMENT(TYP 2)
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4-7 CYLINDER ASSEMBLIES
Each cylinder assembly has safety features and components to ensure against accidental discharge during installation. Prior to starting work, the installer should become familiar with these features by reviewing the equipment, the appropriate data sheets, and the installation instructions. Carbon dioxide cylinders may be located inside or outside the protected space, although it is preferable to locate them outside the space. When they are installed within the space they protect, a remote manual control must be installed to ensure the system can be actuated from a safe location outside the fire area. All cylinder valves are supplied with transport plugs screwed into the discharge ports. These plugs have a small hole drilled at right angles to the axis of the discharge port, so that if accidental discharge dose occur, it will be diffused in a safe manner. In addition, the SW-50M valves have plugs to shield the vent valve and solenoid actuator ports. These plugs must be in position whenever the cylinder assemblies are not secured and/or disconnected from the discharge piping. (The SW-50M valve is initiated by depressing the pilot valve stem in either of these ports.) Actuators must only be assembled to the cylinder valve after the cylinders are secured in their brackets and connected to the discharge piping, which must be complete with nozzles, using the correct discharge bend assemblies. The cylinders should be located to provide convenient access so that they can be readily inspected and also easily removed after use for recharging. Do not install the cylinder where they will be exposed to the weather elements or the direct rays of the sun. Do not install the cylinders where temperatures of less than 0°F (-18°C) or higher than 130°F (54°C), unless otherwise specified on the project drawings. If cylinders are located in hazardous (explosion-proof) area, ensure that the cylinder solenoid control and all other components are approved for such use, and the installation of all materials is made in an approved manner. Cylinders are to be installed in normal upright position. All cylinders are provided with siphon tube.
4-8 INSTALLATION OF CYLINDERS
1. Fasten cylinder bracketing and manifold brackets securely onto a solid wall of floor or structural member using 1/2” bolts with suitable anchors. Bolts must not be anchored into plaster materials. Cylinder brackets must be absolutely secure to withstand the discharge thrust forces. Be sure that threaded rods are inserted in channel before channel is permanently mounted.
2. Fasten cylinder securely in bracketing. 3. All large carbon dioxide system cylinders are shipped with valve protection caps.
Remove protection cap from the cylinder and coat it with a light film of grease. Protection caps should be stored close to cylinders, where they will be readily available for re-installation when cylinders are disconnected from the system and/or transported for recharging.
4. With cylinders properly mounted, attach flexible discharge bends to cylinder valves,
hand tighten only. 5. Mount the header manifold using the discharge bends so that the least possible
strain is put on the connections. 6. Disconnect the flexible bend from the cylinder valve and screw, wrench tight into
manifold.
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4-9 INSTALLATION OF PIPE AND FITTINGS
Generally, drawings provided schematic piping layouts showing pipe diameter, pipe fittings, and pipe lengths utilized for the design calculations. The information shown is not to be used for fabrication of pipe. The installer must verify that the pipe can be installed as indicated, and establish fabrication data based upon his inspection of the site. Changes to piping that may be necessary to suit conditions can critically affect the system flow balance. Any deviations to the piping must be approved by the designer prior to their implementation. Where reducing fittings are called for on the installation drawings, hexagon bushings of 3,000 lb. forged steel may be used. Malleable iron hexagon reducing bushings may also be used, up to 2-inch size, provided ones with the correct pressure/temperature ratings are used. Under no conditions should flush bushings or cast iron bushings be used. If two reducing fittings are required to make the necessary reduction, they should be chosen to split the reduction equally. Pipe should be reamed and cleaned before assembly, and after assembly the entire piping system should be blown out before nozzles and other devices are installed. All valves (stop and selector) not flange, should be installed with a flange joint or union immediately downstream of the valve to facilitate inspection, repair, or replacement. All pressure relief devices should be located and orientated so that the discharge od carbon dioxide will not injure personnel, damage equipment, or be otherwise objectionable. A dirt trap and blow-out, consisting of a tee with capped nipple 3 to 6 inches (76 to 152 mm) long, should be installed at the end of each pipe run. Piping through walls, floors, etc. should be run through sleeves of Schedule 40 pipe at least two sizes larger than the pipe being run and not smaller than 1 inch. Sleeves through floor slabs should extended at least 2 inches above the floor. Sleeves should be packed with fire resistant material so as to be dust and weather tight, as specified on project drawings.
4-10 INSTALLATION OF NOZZLES
1. For total flooding applications, nozzles should be located at the highest practical elevation within the enclosure. Except where more than one tier of nozzles is used, or special application conditions apply, the bottom of the orifice should not be more than 12 inches (305 mm) from the top of the enclosure. For local applications, nozzles must be located as shown on the project drawings.
2. There must not be any obstructions adjacent to the nozzles (structural columns or
beams, ducts, cable trays, racks, equipment, etc.) that will affect the discharge patterns or disbursement of the carbon dioxide.
3. Install nozzle piping at the hazard, as shown on the project drawings. Be sure to
fasten piping securely at each nozzle and change in direction of flow.
4-11 LOCAL MANUAL CONTROL
The local manual controls should not be installed on the cylinder assemblies until the cylinders have been secured into the cylinder bracket, all piping has been completed, and nozzles installed.
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1. Remove the shipping plug from the vent valve port on top of the SW-50M cylinder valve.
2. Ensure that the piston in the actuator is in the retracted position, and that the hand
lever is secured with lock-pin and sealed. Then install the actuator into the vent valve port of the cylinder valve, wrench tight. (During servicing, if piston does not retract, the pressure on top of the piston must be relieved. Loosen then re-tighten the tube connector.)
If any hissing or discharge of gas is noticed during connection of the actuator, stop at once and remove the actuator for cylinder valve. Check the actuator. If no cause for discharge is found contact Tomco Fire Systems.
3. To orientate the manual lever, unscrew the locking nut 1/4 turn, rotate main body of
the actuator to the position required, then re-tighten locking nut. IMPORTANT: Do not unscrew the locking nut more than 1/4 turn.
4. If the system has two master cylinders, the actuators of the two units should be
joined together with a connecting link to enable simultaneous actuation. a) Loosen cylinders with the bracket sufficient to allow the cylinders to be rotated. b) Attach the actuators to the cylinder valves.
c) Unscrew the locking nut of each actuator 1/4" turn, sufficient for the hand levers
to be rotated.
d) Connect the hand levers of the two actuators together using a connecting link. Attach the link to the hole at the end of each lever. Rotate the cylinders and hand levers as necessary to assure a straight line movement.
Do not remove the safety lock pin from its lever during this operation, otherwise accidental discharge of cylinders might occur.
e) Tighten the locking nuts of the actuators and tighten the cylinder brackets.
5. If the manual/pressure actuator is to be used with a solenoid actuator, remove the
blank plug from the pressure port and install the 1/8” Swagelock elbow, which is supplied with solenoid actuator.
4-12 REMOTE CABLE MANUAL CONTROL
1. Install the pull box in a readily accessible location, at a safe distance from the fire
area, and preferably in the main path of egress from the area. The pull box should be
3 to 5 feet (920 to 1520 mm) above floor level.
2. Run 1/2" conduit or 3/8” standard weight galvanized steel pipe from the pull box to
the location of the actuator hand lever, and terminate with a flared-end fitting. Corner
pulleys must be installed at each change of direction of the conduit or pipe, bends or
offsets will not be accepted. The conduit or pipe must be securely fastened with pipe
straps, especially at each corner pulley.
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3. Thread the cable through the handle in the pulley box until the end fitting (nipple) is
engaged.
4. Thread the cable through the conduit and around the pulleys to the cylinder. Remove
the cover from each corner pulley in order to thread the cable around the wheel.
Ensure covers are replaced wrench tight. NOTE: Check to ensure the pulley
wheels are correctly mounted in the housings and rotate freely.
5. Pull on end of cable (at cylinder end) to take up the slack. Be sure the pull handle is
properly installed in the pull box and that end fitting fits into the hole in the pull
handle.
6. Feed the cable through the hole in end of the hand lever or connecting link, and
fasten with a cable clamp. The cable should be taught but not tight. When installed,
be sure that there is at least 9 inches (230 mm) of free cable between the cable
clamp and the flared-end fitting for proper operation of the lever(s).
7. On completion of the installation, install a seal wire on the pull box and remove the
lock pin(s) from the actuator lever(s). The system is now ready for use.
4-13 SOLENOID ACTUATOR
Check the solenoid nameplate to ensure that the coil voltage agrees with the supply
voltage of the system and the site conditions.
Caution: The solenoid actuator should not be connected to cylinder until after
completion of all testing.
1. Provide a junction box located close to the cylinder valve for connection to the
electric actuating circuit.
2. On completion of all testing, connect the solenoid actuator to the adaptor at the top of
the SW-50M cylinder valve, after first confirming that there is no electric power being
applied to the solenoid, and that all o-rings are in place. A slight discharge (puff) of
carbon dioxide might occur as this connection is made.
This connection should be made as follows:
a) secure the mounting bracket square to the valve
b) connect the solenoid valve to the bracket with the screws supplied
c) attach the solenoid to the pressure connection of the cylinder valve wrench tight
d) tighten the screws holding the solenoid to the bracket.
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3. Install the 3/16” hose to connect the solenoid valve exhaust port to the manual
actuator.
4-14 DISCHARGE PRESSURE SWITCH The pressure operated switch is normally located adjacent to the cylinder(s) and is
connected to the manifold or discharge piping from the cylinders.
1. Mount the switch box securely onto a wall or structural member using the mounting
holes provided. Preferred mounting is upright with pipe and conduit connections to
bottom.
2. Connect 1/2" conduit and appropriate wiring to the electrical connection on the switch
box. To reverse the normal switch contact arrangement, remove the toggle switch
assembly and reverse it in the switch box.
3. To switch loads heavier than the switch rating, or requiring more than two contacts,
the switch should be used to operate a relay or contractor to control the load.
4. Connect the 1/4" NPT connection at the bottom of the front plate to the carbon
dioxide piping using 1/4" steel pipe or 1/4" or 3/16” O.D. copper tube. Install a union
fitting at base of cover to allow removal of front plate for testing.
4-15 PRESSURE RELEASE TRIP The pressure release trip is used to release loads of up to a maximum of 75 lbs (34 kg),
which are hung on the piston stem.
1. Mount the pressure release trip onto a solid structural member using 5/16” bolts and
appropriate anchors. Fixing must be suitable for the loading, including spring tension
and/or dead weight of operated equipment.
2. Connect the release trip’s 1/4" NPT connection to the carbon dioxide discharge
piping using 1/4" steel pipe or 1/4" or 3/16” O.D. copper tube.
3. Using 1/16-inch stainless steel cable and cable clamp (or equivalent), connect the
equipment to be operated to the piston stem. The cable must be suspended at right
angles to the piston stem in order to neither bind nor slide off the stem.
4-16 SYSTEM VERIFICATION AND TESTING
Prior to placing the completed system in service, the installation should be inspected and
tested to confirm:
1. Conformance to system design.
2. Suitability of piping, its correctness to project design, and its support and bracketing.
3. Conformance to the required system operating sequence.
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4. The suitability of the hazard environmental control, safety precautions, sealing, etc.
5. Compliance with the requirements of NFPA 12: Standard on Carbon Dioxide
Extinguishing Systems and/or other applicable standard.
If there is any doubt of the ability of the system to operate and provide the necessary
protection, a full discharge test should be considered. A discharge test will verify the total
system operation, check the agent concentration achieved, determine the duration
(soaking time) that the concentration is retained, check acceptability of nozzle discharge,
check audibility and/or visibility of alarms, ensure interlocks and all auxiliary equipment
operate as required, and allow personnel to become completely familiar with the
discharging system and to practice response.
If a full discharge test is not performed, a puff test, using a minimum of one cylinder, must be conducted. A full discharge test must be conducted for all Extended Discharge type systems.
4-16.1 DESIGN
Measure the room and calculate the actual room volume. Check actual volume against
design volume (volume shown on project drawings) and ensure correct quantity of carbon
dioxide is provided.
4-16.2 PIPING
Check the pipe layout to ensure it agrees with the system layout drawings.
Inspect the piping supports and ensure that the pipe is secure and restrained so that
unacceptable movement will not occur.
After the installation of the system piping is completed, and prior to the connection of the
cylinders, nozzles and other equipment, the discharge piping should be blown out and
then pressure tested for leakage. Plug or cap all piping outlets and apply 100 psi (7 bar)
pressure with dry nitrogen or dry air for 10 minutes. At the end of 10 minutes, the
pressure loss should not be greater than 5 psi (0.35 bar). When pressurizing piping, the
pressure should be increased in 50 psi (3.5 bar) increments.
Caution: Pneumatic pressure testing creates a potential risk of injury to
personnel in the area as a result of airborne projectiles if piping should
rupture. Prior to conducting the pneumatic pressure test, the protected
area must be evacuated and appropriate safeguards must be provided
for test personnel and for equipment in the area.
4-16.3 CYLINDERS
1. Inspect cylinders and ensure bracketing and cylinders are secure.
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4-16
2. Verify the weight of carbon dioxide in all cylinders, using either an accurate weigh
scale or an approved liquid level gauge. The contents should be within +/-10% of the
normal capacity.
3. Check cylinder discharge bends and check valves for proper connection and
tightness.
4. Ensure that appropriate identification, operating and warning signs are mounted or
posted.
4-16.4 NOZZLES
Each nozzle has an orifice drilled to suit the specific location and discharge flow
requirements. The orifice identification number is stamped on each nozzle.
1. Verify that orifice sizes are as indicated on the project drawings and that the nozzles
are orientated to discharge correctly.
Caution: Ensure discharge will not splash flammable liquids or create dust
clouds that could extend the fire. Also, ensure the discharging agent
will not injure personnel in the area.
2. Ensure that each nozzle pipe drop is bracketed or braced against the nozzle
discharge thrust, and that the nozzle cannot swivel on its pipe fitting.
3. Check the cleanliness of the protected area to determine if protective caps or seals
are required to prevent orifices from clogging.
4-16.5 MANUAL CONTROL: LOCAL AND REMOTE CABLE TYPE
Ensure the manual actuators and the remote manual controls, for all parts of the
system – master cylinders for main and reserve systems, all master cylinders in a joint
system, and selector and stop valves – are accurately identified and will be accessible
during a fire.
All testing should be carried out with the manual actuator(s) disconnected from the
cylinders, and other devices.
1. With the manual actuator disconnected from the cylinder or other device, pull the lock
pin and operate the lever to verify the movement of the operating piston 1/8” (3.2
mm).
2. If a cable type remote control is used, pull the handle in the pull box and check the
pull, force and length of pull required. Also ensure that there is at least 9 inches (229
mm) of clear movement at the actuator lever.
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Note: Manual controls should not require a pull of more than 40 lbs (178 Newtons),
nor a movement of more than 14 inches (356 mm) for system operation.
3. Check to ensure that the cable runs free and that there is no binding of cable in the
corner pulleys and conduit, and that the corner pulleys and conduit are securely
fixed.
4. Reset the pull box and affix a lead and wire, or similar, seal. Ensure a lock pin is
installed in the manual actuator and that the stem is retracted before reconnecting
the actuator to the cylinder valve or other device. (This will prevent operation of the
cylinder while actuator is being installed.) If a remote manual control is not used,
secure the lock pin in the actuator with a lead and wire seal. If a remote manual
control is used, the actuator lock-pin must be removed after installation before
system is placed in service.
4-16.6 ELETRIC ACTUATOR
Perform all inspections and tests on the control panel, detectors, signals and other
devices as specifically indicated in the specific equipment manufacturer’s manuals.
Note: The solenoid actuator and the manual actuator must be removed from the
cylinder valve before any testing is performed.
1. Ensure the solenoid actuator is of the correct voltage for the service.
2. Connect the 3/16” hose (supplied) to the respective solenoid valve and manual
actuator. Apply dry nitrogen pressure of 100 psi (7 bar) or dry, clean air pressure to
the inlet port of the solenoid valve (cylinder connection port).
3. Apply the appropriate voltage to the solenoid by actuating a manual station or firing a
detector to operate the discharge circuit. Note: Do not operate fixed thermal detectors
unless they are of the restorable type. The solenoid should operate, which will be
indicated by the movement of the piston stem in the manual actuator. Also there will
be an escape of nitrogen from the small vent hole in the side of the manual actuator.
4. Remove electric power from the solenoid. The solenoid valve should close, indicated
by the cessation of nitrogen discharge, and the return of the piston stem in the
manual actuator to its normal standby position. Check for leakage at the vent hole.
5. Shut off the pressure supply, and exhaust the line pressure using the exhaust valve
which should be part of the pressurizing equipment.
6. After all testing has been completed satisfactorily, remove the 3/16” hose, re-install
all actuators to the cylinder valves, and ensure all electrical connections, including
ground connections, are in order. Replace the 3/16” hose, taking care to ensure the
pressure connections are gas tight.
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4-16.7 OPTIONAL DEVICES
1. Gas Operated Sirens. Disconnect the siren from the discharge piping and connect to
a small carbon dioxide cylinder. Operate the carbon dioxide cylinder and ensure all
sirens operate and that the sound is readily heard throughout the protected space.
This should be done under normal background noise conditions.
2. Pressure Operated Switches. To test the circuits and to ensure auxiliary functions
operate correctly, either:
a) Disconnect the union at the pressure connection
b) Insert a small rod into the pressure connection of the cover plate and push
against the piston to trip the switch.
c) Push plunger down to reset switch. OR...
d) Remove the four cover screws and swing cover away from switch box. Manually
operate interior toggle switch. After testing, ensure toggle is returned to normal
stand-by position, then reinstall cover plate.
3. Pressure Release Trip. With a screw driver or other blunt instrument manually push
the stem to the retracted position. Allow the cable to fall, and ensure the connected
equipment operates as required.
4-16.8 CARBON DIOXIDE PUFF TEST
The purpose of this test is to check the integrity of the piping system and to ensure the
pipes are not blocked. It will not check the concentration of carbon dioxide that will be
obtained under a full discharge conditions, or check the integrity (tightness) of the
enclosure.
1. Disconnect all cylinders, except one master cylinder from the system.
2. Operate the remaining master cylinder and ensure carbon dioxide does discharge
from all nozzles.
3. Ensure that there is no undue pipe movement.
4. Ensure all pressure-operated devices operate and that the connected equipment,
alarms and other functions are controlled as required.
4-16.9 CARBON DIOXIDE DISCHARGE TEST
A full discharge test should be performed when there are doubts about the operation of
the system, when any inspection indicates their advisability, and for all extended
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discharge type systems. It is recommended that a full discharge test be performed
whenever cylinders are removed for hydrostatic testing.
During this test :
1. Make checks as indicated under the Puff Test.
2. With a concentration meter, check the carbon dioxide concentrations achieved at
several locations within the enclosure, and specifically adjacent to the primary hazard
within the enclosure.
3. Check the discharge time.
4. Check the holding time, the length of time the carbon dioxide concentration is
maintained.
5. Ensure that the enclosure is reasonably well sealed, and that there is no major
leakage.
6. Ensure all alarms function for the required period of time and that they can be heard
and/or seen throughout the area. This should be done under normal area operating
conditions, i.e. normal background noise and lighting, etc.
Tomco2 Fire Systems Operation And Service 8/16/10 Rev. 0
SECTION 5
OPERATION AND SERVICE
Table of Contents Paragraph Subject 5-1 General 5-2 System Activation 5-3 Recharging 5-4 System Maintenance 5-5 Cylinder Recharge Manual 5-6 CO2 Pressure/ Temperature Curve
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5-1
SECTION 5
OPERATION AND SERVICE 5-1 GENERAL
A. Operation and service procedures in this section are provided as a guide for identifying and correcting systems faults. The use of these procedures by competent personnel will reduce system down time and minimize unnecessary costs. Troubleshooting tables are provided for identifying and isolating system/component faults.
B. The CO2 system shall be maintained in full operating condition at all times. Use,
impairment and restoration of this protection shall be promptly reported to the authority having jurisdiction.
5-1.1 Inspection and Testing
All carbon dioxide systems shall be thoroughly inspected and tested for proper operation by competent personnel.
5-2 SYSTEM ACTIVATION
1. Notify your local fire department.
2. Do not open doors or windows, or remove the carbon dioxide from the protected area
until the fire is completely out.
3. Do not enter the area until the carbon dioxide has been removed and the area
ventilated. If it is necessary to enter the area while it still contains carbon dioxide, self-
contained breathing apparatus should be used.
In general, providing the system discharges during the early stages of the fire, and
providing all plant shut-down functions are operated and safety precautions are taken, the
fire should be extinguished within one minute of the end of carbon dioxide discharge.
However, the area should be kept closed for at least fifteen minutes following discharge to
allow the area to cool, and to prevent re-ignition. For deep-seated hazards, the space
should be kept tightly closed for at least sixty minutes following discharge.
To check if fire is out:
1. Look for smoke and steam coming from cracks around doors, windows, vents, etc.
2. Feel the doors and walls. If they are hot do not open doors, the fire is still burning or is
in the cooling stage.
3. Listen for crackling sounds.
Have your fire department check the space for you.
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5-2
Do not enter area with a lighted cigarette or open flame as flammable vapors may be
present which could cause re-ignition or an explosion.
After opening the door:
1. Completely ventilate the space. CO2 is heavier than air and will drift into low level
spaces (e.g. rooms below grade). Use fans to remove CO2, smoke and fumes from low
areas.
2. Clean-up residue from fire.
3. Determine cause of fire and take corrective action.
5-3 RECHARGING THE SYSTEM
Have the system completely serviced by an Tomco Fire Systems approved service agency.
After operation, the system should be recharged without delay in order to maintain
protection.
1. Remove, inspect and recharge all cylinders.
2. Inspect the piping system and ensure pipe supports are still secure.
3. Inspect all components, including nozzles, switches, detectors, alarms, etc. Replace
all equipment that has been damaged, or that has been exposed to direct flame or
excessive heat from the fire.
4. Reinstall system in accordance with the Installation Instructions.
5. Verify and test system in accordance with this manual and Section 4.8 of NFPA 12.
6. Check the hydrostatic test date on cylinders and flex hose. If more than 5 years have
elapsed from the date of last test, the cylinders will require hydrostatic testing.
5-4 SYSTEM MAINTENANCE
In order to ensure that the system has not been tampered with and is in a fully
operational condition, it must be inspected and tested on a regular basis by trained,
competent, service personnel. In accordance with NFPA 12: Standard on Carbon Dioxide
Extinguishing Systems, insurance and other code requirements, all carbon dioxide systems
should be thoroughly inspected and tested annually. It is recommended that a service and
maintenance contract be established with a Tomco Fire Systems approved service agency.
All persons who may be expected to inspect, test, maintain, or operate carbon dioxide fire
suppression systems should be thoroughly trained, and be kept thoroughly trained, in the
functions they are expected to perform.
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5-3
5-4.1 Monthly Inspections
1. Check system components for mechanical damage and tampering. All system lead
and wire seals, or similar, should be intact.
2. Ensure that there are no obstructions that would prevent system operation, or prevent
proper distribution of carbon dioxide from discharge nozzles.
3. Verify that egress is clear to allow safe evacuation of personnel from the hazard area,
and safe access to the manual controls.
2. Check that all electrical circuits show normal. If a control panel is utilized, power lamp is
on and all other lamps are off.
5-4.2 Semi Annual Inspections
1. Perform all the monthly inspections.
2. Check if there have been any changes in the shape, size, contents or use of the
protected space. Any changes will necessitate a review of the system design.
3. Check the cylinder contents (weight), this may be done by using a platform or beam
scale or an approved liquid level gauge. Record weight on the cylinder tag or in the log
book. If the cylinder has a loss in net weight of more than 10 percent, it should be
recharged or replaced. The cylinder full weight is indicated on the valve.
Check the date of the last hydrostatic test. If more than 12 years have elapsed since the
last test, the cylinders should be discharged and retested before being returned to service.
(It is recommended that a full discharge test be performed when cylinders are emptied for
hydrostatic testing.)
4. Examine cylinders, piping and nozzles for any evidence of corrosion or other physical
damage.
5. Check cylinder bracketing, piping, pipe hangers and straps to ensure all are secure
and suitably supported. This is particularly important where shock and vibration are
encountered as a normal part of the environment (e.g. on board ships, etc.).
6. Ensure discharge nozzles are still located as originally installed, that the nozzle
discharge orifices are clear and unobstructed, and that the nozzles are properly
positioned and aligned. Ensure seals are used where necessary.
7. Remove the manual actuators from all cylinders that they operate and operate the
hand lever. The actuator should operate freely and the operating stem should travel 1/8-
inch (3.2 mm).
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5-4
Caution: When two actuators are connected together, both actuators must be
removed from the equipment they control, before testing.
8. If a remote manual cable control is used, ensure the actuators are removed from the
equipment they control, and operate all cable controls by the pulling cable at the pull
box to ensure freedom of movement and travel. Both main and reserve actuator cables
should be operated, if used. Check the condition of conduit and corner pulleys.
9. Inspect and clean all fire detectors. Check the sensitivity and adjust smoke detectors.
10. If the system is automatically electrically actuated, disconnect the solenoid actuators
and manual actuators from the cylinder valves, then:
a) Operate all electric Initiating devices (detectors, manual stations, etc.), one at a
time, and ensure the respective actuators operate. There will be a click sound
when the solenoid operates. This check should be made for both main and reserve
banks of cylinders, if used. Reinstall the solenoid and manual actuators after all
testing is completed.
Alternatively, unplug the cable connectors from all solenoid valves and insert light
bulbs In the cable connectors. The bulbs will light when each circuit is energized.
Also, the operating stem of the manual actuator should travel down 1/8-inch (3.2
mm).
b) Verify that all electric alarm signals function, and that all audible devices can be
heard and all Illuminated devices can be seen throughout the protected space.
This should be done in the normal working environment with normal background
noises and lighting in place.
c) If the system has an extinguishment control panel, refer to the panel
manufacturer’s instruction manual for maintenance procedures.
11. Confirm operation of all auxiliary and supplementary components such as time delays,
pressure operated switches, release trips, damper releases, shut-off valves, etc. by
manual operation, where possible. Pressure operated time delays and gas operated
sirens should be checked using a carbon dioxide portable extinguisher as a
pressurizing source.
Ensure all equipment is reset and all components are installed and left in the normal
Standby condition on completion of testing.