Upon completion of this unit of study, the student should be able to:

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3 UNIT OBJECTIVES Upon completion of this unit of study, the student should be able to: 1. Identify supervisory alarm equipment and demonstrate action to take upon receipt of an alarm according to local operating conditions. 2. Identify the various types of detection devices used in fire detection systems. 3. Identify the components of an automatic sprinkler system and their functions. 4. Identify the major sprinkler systems and describe their operation. 5. Identify the actions required for fire department support of an automatic sprinkler system. 6. Connect a fire department pumper to the fire department connection for a sprinkler system. 7. Demonstrate the procedure to temporarily stop the flow of water from a sprinkler head. 8. Identify and demonstrate the procedures for inspecting an automatic sprinkler system in order to determine the systems state of readiness. Fire Detection, Alarm, & Suppression Systems - 1

4 NFPA STANDARDS Successful completion of the information in this section is necessary to fulfill the requirements of the following sections of NFPA : Fire Fighter I Standard Conserve property as a member of a team, given salvage tools and equipment and an assignment, so that the building and its contents are protected from further damage. (A) Requisite Knowledge. The purpose of property conservation and its value to the public, methods used to protect property, types of and uses for salvage covers, operations at properties protected with automatic sprinklers, how to stop the flow of water from an automatic sprinkler head, identification of the main control valve on an automatic sprinkler system, and forcible entry issues related to salvage. (B) Requisite Skills. The ability to cluster furniture; deploy covering materials; roll and fold salvage covers for reuse; construct water chutes and catch-alls; remove water; cover building openings, including doors, windows, floor openings, and roof openings; separate, remove, and relocate charred material to a safe location while protecting the area of origin for cause determination; stop the flow of water from a sprinkler with sprinkler wedges or stoppers; and operate a main control valve on an automatic sprinkler system. Fire Fighter II Standard 6.5.3* Prepare a preincident survey, given forms, necessary tools, and an assignment, so that all required occupancy information is recorded, items of concern are noted, and accurate sketches or diagrams are prepared. (A) Requisite Knowledge. The sources of water supply for fire protection; the fundamentals of fire suppression and detection systems; common symbols used in diagramming construction features, utilities, hazards, and fire protection systems; departmental requirements for a preincident survey and form completion; and the importance of accurate diagrams. (B) Requisite Skills. The ability to identify the components of fire suppression and detection systems; sketch the site, buildings, and special features; detect hazards and special considerations to include in the preincident sketch; and complete all related departmental forms. 2 - Fire Detection, Alarm, & Suppression Systems

5 I. Fire Detection, Alarm, and Suppression Systems A. Fire detection, alarm, and suppression systems are installed to: 1. Notify occupants to escape a fire 2. Summon emergency responders 3. Initiate fire control and suppression systems and sound an alarm 4. Supervise suppression systems for operational status 5. Initiate environmental and utility controls B. Fire fighters must understand the various types of fire protection systems which may be encountered in different occupancies and 1. How these systems function 2. Their role when these systems function in an emergency II. Types of Alarm Systems (Essentials p. 826) A. Protected premises fire alarm systems 1. Also known as "local warning systems" 2. Designed to be initiated manually by pull stations 3. Installed in small schools and public properties 4. Designed to only alert the building's occupants Fire Detection, Alarm, & Suppression Systems - 3

6 5. Does not notify the fire department 6. Automatic detection devices may be added to the system to detect a fire and initiate the signal B. Heat detectors 1. Respond to the thermal energy of a fire a. Typically the slowest type of system to activate b. Activate at a predetermined temperature or when a specified temperature rate of rise occurs c. Used in areas unoccupied or environmentally unsuitable for application of smoke detectors d. Typically used as a property protection device 2. Fixed temperature heat detectors a. Activate when heated to the rated temperature, usually 135 o F or higher b. In a large area, a fire could burn for some time without activating a fixed-temperature detector c. Fusible devices/frangible bulbs (1) Operate identically to fusible links or frangible bulbs used in automatic sprinkler systems (2) To restore a fusible device/frangible bulb detector, the entire detector must be replaced 4 - Fire Detection, Alarm, & Suppression Systems

7 (3) Many of these devices are still in service, however, they are no longer manufactured (4) A fusible device is held in place with solder with known melting (fusing) temperature (5) When the temperature rises to the fusing temperature, the solder melts, and a spring closes the contact points (6) The action completes the circuit and initiates the alarm signal (7) A frangible bulb holds the electrical contacts apart like a fusible link does (8) The bulb is a small glass vial containing a liquid with a small air bubble (9) When the rated temperature is reached, the bulb fractures and falls out and the contacts complete the circuit to initiate the alarm d. Continuous line detector (1) Designed to detect heat over a linear area parallel to the detector (2) Used to protect long cable channels (3) One type is a cable with a conductive metal inner core sheathed in stainless steel tubing (a) The core and sheathing are separated by an insulating material Fire Detection, Alarm, & Suppression Systems - 5

8 (b) At a predetermined temperature, the insulation loses some of its electrical resistance (c) The current flow between the core and sheathing increases and initiates the alarm (4) Another system uses two insulated wires with an outer covering (a) When the rated temperature is reached, the insulation melts and the wires touch (b) The circuit is then completed and the alarm initiated e. Bimetallic element detector (1) Uses two metals with different heat expansion rates (2) When heated, one metal expands faster, causing the strip to bend (3) The deflection makes or breaks the circuit causing alarm activation (4) Most bimetallic detector reset automatically when cooled 3. Rate-of-rise heat detectors a. Operates on the assumption that the temperature from a fire will increase faster than normal atmospheric heating b. Designed to operate when the temperature rise exceeds 12 o F to 15 o F in one minute 6 - Fire Detection, Alarm, & Suppression Systems

9 c. Most are reliable and not subject to false activations d. Automatically reset if undamaged e. Pneumatic rate-of-rise spot detector (1) Most common type of rate-of-rise detector used (2) Consists of a dome-shaped air chamber with a flexible metal diaphragm in the base (3) A small hole allows air to enter and exit the chamber during normal temperature changes (4) During a fire, the air in the chamber expands faster than it can escape (5) The expansion causes the pressure in the chamber to increase and forces the metal diaphragm against the contact points, initiating the alarm f. Rate-compensated detector (1) Consists of an outer metallic sleeve housing two bowed struts with slower expansion rates than the sleeve (2) When heated rapidly, the outer sleeve expands in length (3) The tension is reduced on the inner strips causing the contacts to come together Fire Detection, Alarm, & Suppression Systems - 7

10 C. Smoke detectors/alarms 1. Smoke detectors a. Typically installed in nonresidential and multifamily occupancies b. Detect smoke and transmit a signal to another device that sounds the alarm 2. Smoke alarms a. Installed in single-family dwellings b. Self-contained unit capable of detecting smoke and sounding an alarm 3. Photoelectric smoke detectors a. Also called a "visible products-of-combustion detector" b. Use a photoelectric cell coupled with a small light source c. Generally more sensitive to smoldering fires than ionization detectors d. Beam application type (1) A beam of light is focused onto a photoelectric cell which converts the beam into an electric current (2) When smoke obscures the light beam, the amount of current is reduced and an alarm sounds 8 - Fire Detection, Alarm, & Suppression Systems

11 e. Refractory photocell type (1) A light beam passes through a small chamber away from the light source (2) The light does not strike the photocell and no current is produced (3) When smoke enters the chamber, the light beam is refracted in all directions and strikes the photocell, activating the alarm 4. Ionization smoke detectors a. Tiny particles and aerosols are produced during combustion b. These particles can be detected by devices using a small amount of radioactive material to ionize air molecules as they enter the detector c. The ionized air particles allow an electrical current to flow between plates in the ionization chamber d. When smoke enters the chamber, its particles attach to the air ions making the air less conductive e. The decrease in current activates the alarm D. Flame detectors 1. Reacts the fastest to fire a. Prone to activation by sunlight, welding and other bright lights Fire Detection, Alarm, & Suppression Systems - 9

12 b. Usually positioned where other light sources are unlikely c. Must have an unobstructed view of the protected area d. Used where immediate reaction is necessary such as flammable liquid manufacturing and dispensing facilities 2. Infrared detectors a. Sensitive to sunlight and usually installed in fully enclosed areas b. Most are designed to require flickering motion of flame to activate 3. Ultraviolet detectors a. Virtually insensitive to sunlight b. Not suitable when arc welding is done E. Fire-gas detectors 1. Used to detect the gases produced by a fire in a confined space 2. The gases produced will vary depending on the chemical makeup of the burning fuel 3. Will initiate an alarm more quickly than a heat detector but slower than a smoke detector 4. Can be designed to be sensitive only to those gases produced by a hostile fire and ignore those produced by a friendly fire in an industrial operation 10 - Fire Detection, Alarm, & Suppression Systems

13 F. 5. Fire fighters will encounter very few fire-gas detectors except in special occupancies Combination detectors: makes detectors more responsive to fire conditions 1. Fixed temperature/rate-of-rise heat detectors 2. Smoke/heat detectors 3. Smoke/fire-gas detectors G. Detectors have a variety of audible and visual indicating devices H. Fire department response to heat/smoke alarm calls 1. Normally a full structure fire response is dispatched to the location of a activated smoke or heat alarm 2. If there are no signs of smoke or fire when they arrive, a fire fighter with a portable radio should go to the alarm control panel to silence the alarm so it can be further investigated 3. The system must not be reset or turned off until fire fighters determine the cause of the alarm 4. The individual assigned to the alarm panel must remain and monitor the panel in case of another alarm 5. If a second alarm sounds, the Incident Commander should be immediately notified 6. The system can be reset after the source of the alarm is determined and stabilized Fire Detection, Alarm, & Suppression Systems - 11

14 III. Automatic Alarm Signaling Systems (Essentials p. 837) A. Fire codes or insurance companies may require an occupancy to have an alarm system which transmits a signal off site to summon help B. Auxiliary systems 1. Local energy systems: used only in communities with municipal fire alarm box systems a. An occupancy's alarm system is directly connected to the municipal master alarm box b. When the occupancy's alarm activates, it trips the alarm box to which it is attached and transmits the alarm to the alarm center 2. Shunt systems where the municipal alarm circuit extends ("is shunted") into the protected property 3. Parallel telephone systems a. Do not connect to the municipal alarm system b. Transmits the alarm over municipally controlled telephone circuits, which are not used for any other purpose C. Remote station systems 1. Connected directly to the public dispatch center or other approved answering service 2. Usually connected over leased telephone lines 3. Common where central station systems are not available 12 - Fire Detection, Alarm, & Suppression Systems

15 D. Proprietary alarm systems 1. Used for large commercial and industrial buildings, high rises, and commonly owned facilities in a single location (campus or industrial complex) 2. Have a central alarm receiving point on the property that is constantly staffed by trained personnel 3. Alarms are transmitted to a supervising stations where operators can call the fire department or the fire department is automatically notified E. Central station alarm systems 1. Typically a company that sells alarm services to individual customers at different properties 2. Connected to protected properties by dedicated phone lines or radio transmitter 3. When an alarm is received, central station employees initiate an appropriate emergency response F. Fire alarm systems are designed to be self-supervising 1. A distinct trouble signal is generated anytime the system is not operating normally, such as when: a. A utility power outage occurs and the system switches to battery power b. A break in a detector or notification circuit occurs 2. Older systems use closed, supervised circuits where a tiny current always flows Fire Detection, Alarm, & Suppression Systems - 13

16 3. Newer systems microprocessors do an internal diagnostic system test at specified intervals 4. Alarm signals must be distinctively different from trouble signals 5. Some fixed suppression systems depend on a signal from a manual pull station or an automatic detection device to activate 6. Alarm systems must also be "addressable," indicating the location of an activated detector or pull station or a trouble signal G. Auxiliary services interconnected with alarm systems 1. Modern alarm systems may incorporate environmental controls, security, and personnel access controls 2. These auxiliary services may include: a. Shutting down HVAC systems for smoke control b. Closing smoke or fire-rated doors and dampers c. Increasing air pressure in stairwells to exclude smoke from means of egress d. Overriding elevator controls e. Monitoring refrigeration systems and coldstorage areas f. Controlling personnel access to restricted areas g. Detecting combustible or toxic gases 14 - Fire Detection, Alarm, & Suppression Systems

17 IV. Sprinkler Systems (Essentials p. 842) A. Consists of a series of sprinkler heads (sprinklers) arranged to automatically apply water directly on a fire to either extinguish it or control it until fire fighters arrive 1. NFPA Standards set minimum guidelines for: a. Spacing of sprinklers b. Size of piping to be used c. Methods for hanging piping d. Minimum design area per sprinkler e. Installation details 2. General types a. Complete system: protects an entire building b. Partial system: protects only certain areas, such as high hazard areas and exit routes B. Factors affecting sprinkler system reliability and performance: 1. Partially or completely closed valves 2. Poor or improper maintenance 3. Improper design 4. Hazards of the occupancy 5. Distribution obstructions Fire Detection, Alarm, & Suppression Systems - 15

18 6. Deficient water supply 7. Partial sprinkler protection 8. Frozen or broken pipes 9. Damaged or painted sprinkler heads 10. Tampering or vandalism C. Properly operating sprinkler systems: 1. Improve the life safety of a building's occupants by applying water when a fire is relatively small 2. Prevent vertical fire spread in multistory buildings 3. Protect occupants in other parts of a building from fire spread D. Sprinklers alone may not be as effective if: 1. Fires are too small to activate the sprinkler system 2. Smoke reaches the occupants before the system activates 3. Sleeping, intoxicated, or handicapped people occupy the building E. Sprinkler system components 1. Water supply a. Public water supply b. Gravity tanks c. Fire pumps 16 - Fire Detection, Alarm, & Suppression Systems

19 2. Basic piping a. Supply main b. Riser: larger vertical piping c. Feed main: connects riser to cross mains d. Cross mains: services branch lines e. Branch lines: smaller piping on which sprinklers are installed 3. Sprinkler heads a. Parts (1) Valve cap (2) Frame arms (3) Deflector (4) Toggle joint (5) Lever arms (6) Fusible link b. Temperature ratings: may be identified by colorcoded frame arms, colored liquid, or temperature stamped into the head (1) Fusible link sprinkler heads (a) 135 o to 170 o : uncolored or black (b) 175 o to 225 o : white Fire Detection, Alarm, & Suppression Systems - 17

20 (c) 250 o to 300 o : blue (d) 325 o to 375 o : red (2) Frangible bulb heads (a) 135 o to 170 o : orange or red glass bulb (b) 175 o to 225 o : yellow or green bulb (c) 250 o to 300 o : blue bulb (d) 325 o to 375 o : purple bulb c. Release mechanisms (1) Fusible-link (2) Chemical pellet (3) Frangible bulb (4) Quick-response: has a specially designed fusible link with an increased surface area d. Fusible link sprinkler head operation (1) Two lever arms press against the frame arms and valve cap to hold back the water (2) The fusible link holds the levers together (3) The link melts or fuses when exposed to heat and the water pushes the levers and cap out of the way (4) Water strikes the deflector and becomes a spray 18 - Fire Detection, Alarm, & Suppression Systems

21 e. Frangible bulb sprinkler head operation (1) The bulb filled with liquid and a bubble holds the orifice shut (2) Heat expands the liquid until the bubble is absorbed by the liquid (3) The increase in internal pressure shatters the bulb and the orifice opens (4) Water strikes the deflector and becomes a spray f. Chemical pellet sprinklers (1) A pellet of solder, under compression, within a small cylinder, melts at a predetermined temperature (2) A plunger then moves down and releases the valve cap g. Sprinkler head position (1) Pendant: extends down from the underside of the piping (2) Upright: sits on top of the piping (3) Sidewall: extends from the side of the pipe and has a special deflector to create a fanshaped pattern (4) Special purpose (a) Corrosive-resistant coated (b) Recessed Fire Detection, Alarm, & Suppression Systems - 19

22 4. Sprinkler head storage a. A storage cabinet for extra heads and a wrench should be installed near the sprinkler system b. Normally holds minimum of six extra heads 5. Control indicator valves a. Located between water source and sprinkler system to shut off water supply b. Indicating valves visually show if opened or closed c. Outside screw and yoke (OS&Y) (1) Has a yoke on the outside with a threaded stem which controls the opening and closing of the valve gate (2) Threaded stem is out of yoke when open d. Post indicator valve (PIV) (1) Valve stem inside of hollow post (2) Has small window on post where "OPEN" or "SHUT" is displayed e. Wall post indicator valve (WPIV) - similar to PIV but extends through wall f. Post indicator valve assembly (PIVA) (1) Does not have the small window and words (2) Has a sight area that is open when the valve is open 20 - Fire Detection, Alarm, & Suppression Systems

23 6. Operating valves a. Alarm test valve: simulates activation of the system b. Inspector's test valve: equipped with a same size opening as a sprinkler head to simulate activation of a head c. Main drain valve: to drain water from the system for maintenance 7. Water flow alarms a. Hydraulically operated: to alert occupants and a passerby that water is flowing through the system b. Electrically operated: to alert occupants and transmits an alarm when water is flowing through the system 8. Fire department connection (FDC) a. Usually a clappered siamese with at least two 2 1 / 2 -inch female connections b. A check valve is located between the fire department connection and the system to prevent water from the system flowing into the FDC c. Fire department support (1) Supply pumper should have a capacity of at least 1,000 gpm (2) Using same water main as that supplying system will rob the sprinkler system of water Fire Detection, Alarm, & Suppression Systems - 21

24 (3) A minimum of two 2 1 / 2 -inch or larger lines should be attached to the FDC (4) Most sprinkler systems are supplied at 150 psi E. Types of sprinkler systems (Essentials p. 852) 1. Wet pipe systems a. Used in locations not subject to freezing b. Contain water under pressure at all times c. Sprinkler heads will discharge water immediately on activation d. Usually equipped with an alarm check valve on the main riser e. Newer systems may have a backflow prevention check valve and electronic flow alarm instead of an alarm check valve ("straight stick systems") f. Maybe equipped with a retard chamber g. Gauges (1) Designed to catch excess water that may come through the alarm valve in a water pressure surge (2) Reduces chances of false alarms (1) Installed above and below each alarm check valve 22 - Fire Detection, Alarm, & Suppression Systems

25 (2) Riser pressure gauge showing pressure in system (3) Owner or owner's representative should check and record monthly to ensure normal water supply pressure 2. Dry pipe systems a. Used in locations where piping may be subjected to freezing temperatures b. System contains air under pressure instead of water (1) When a sprinkler head opens, air leaves piping and dry-pipe valve automatically opens to fill the system with water c. Gauges (2) Designed with a dry-pipe valve so that a small amount of air pressure holds the valve closed over the water pressure on other side (1) One gauge on the water side and another gauge on the air side of dry pipe valve and at the air pump supplying air (2) Owner or owner's representative should check and record gauge readings weekly to ensure normal air and water pressures are being maintained 3. Preaction sprinkler systems a. Used in properties where it is important to prevent water damage, even if pipes are broken Fire Detection, Alarm, & Suppression Systems - 23

26 b. System pipes are dry until water is released into system in response to detectors c. Uses a deluge type valve, fire detection devices, and closed sprinkler heads d. The operation of detectors releases water into the system and sounds an alarm e. Sprinkler heads open only from functioning of fusible links 4. Deluge system systems a. Used to protect extra hazardous occupancies b. All sprinklers heads are always open (1) System activated by flame or heat detectors (2) When system activates, water flows from all sprinkler heads 5. Residential sprinkler systems a. Used to prevent fire involvement in area of origin and allow occupants to escape b. Typically equipped with quick-response sprinkler heads c. May be wet or dry system d. Components (1) May use plastic or steel piping (2) Must have a pressure gauge, flow detector, and means for draining system 24 - Fire Detection, Alarm, & Suppression Systems

27 F. Fire department operations with sprinkler systems 1. Whenever possible, pumpers supplying hose streams should operate from mains other than that supplying system 2. Control valves should not be closed until fire has been extinguished unless the incident commander determines need to prevent further damage 3. If control valve is closed, a fire fighter should be stationed at valve with a radio to officer-in-charge in case the valve needs to be reopened 4. Fire department personnel should not service system components or restore a system to service due to the potential liability 5. Restoring the system to service should be done by representatives of the owners or occupants or a commercial sprinkler service company 6. Control of water flow from sprinkler heads a. Remove sprinkler wedge or clamp from apparatus b. Raise ladder under activated head c. Climb ladder d. Insert wedge or clamp into flowing head e. Gently tap wedge into place to stop flow Fire Detection, Alarm, & Suppression Systems - 25

28 V. Standpipe Systems A. Allow connection of hoses on various levels of a structure to avoid carrying hoselines up several levels B. Components 1. Fire department connection: usually a clappered siamese with at least two 2 1 / 2 -inch male connections 2. Piping 3. Interior fire department valves and connections C. Class I standpipe: have 2 1 / 2 -inch hose connections for use by fire fighters D. Class II standpipe 1. Have 1 1 / 2 -inch single jacket linen hose with a lightweight nozzle attached 2. Designed for use by building occupants with no fire training 3. Most have been taken out of service E. Class III standpipe 1. Have 2 1 / 2 -inch hose connections and 1 1 / 2 inch single jacket linen hose with a lightweight nozzle attached 2. Designed for use by building occupants or fire fighters 26 - Fire Detection, Alarm, & Suppression Systems

29 VI. Fire Detection, Alarm, and Suppression Systems Summary A. Fire fighters are likely to encounter detection and/or suppression systems in many commercial occupancies and must be familiar with their operations B. Personnel have to understand their role in dealing with detection and alarm system activations and always keep in mind that a sounding alarm should not be taken lightly C. Sprinkler systems have the capacity to control small fires in early stages but should not be depended on to completely control every fire Fire Detection, Alarm, & Suppression Systems - 27

30 FIRE DETECTION, ALARM, & SUPPRESSION SYSTEMS QUIZ Name: Date: 1. Which private fire alarm signaling system is designed to only notify the occupants within the protected premises of a fire? a. Central station system b. Remote station system c. Proprietary system d. Protected premises fire alarm system 2. Which private fire alarm signaling system is designed to transmit alarms to a commercial company which then sends the alarms to the fire department? a. Central station system b. Remote station system c. Proprietary system d. Protected premises fire alarm system 3. Which private fire alarm signaling system is designed to usually protect large plants or complexes and has a supervising station to monitor the system? a. Central station system b. Remote station system c. Proprietary system d. Protected premises fire alarm system 4. Which type of detectors are typically the slowest to respond when a fire occurs? a. Heat detectors b. Smoke detectors c. Flame detectors d. Fire-gas detectors 5. Which is the most common smoke detector used by consumers and is designed to activate when the invisible products of combustion are detected by a radioactive material in the detector? a. Ionization detector b. Photoelectric detector c. Fixed temperature detector d. Rate-of-rise detector 28 - Fire Detection, Alarm, & Suppression Systems

31 FIRE DETECTION, ALARM, & SUPPRESSION SYSTEMS QUIZ 6. A sprinkler system is designed to be used in areas where freezing is likely to occur. a. Wet pipe b. Dry pipe c. Quick response d. Dry response 7. Which of the following factors affect sprinkler system reliability and performance? a. Partially or completely closed valves b. Poor or improper main c. Distribution obstructions d. All of the above 8. The smaller piping on which sprinklers are installed are known as the. a. Risers b. Feed main c. Branch lines d. Cross mains 9. On which of the following sprinkler system valves is a threaded stem extended from the valve when it is open? a. Post indicator valve b. Outside screw and yoke c. Post indicator valve assembly d. Wall post indicator valve 10. Which of the following sprinkler systems is used to protect extra hazardous occupancies with all sprinklers heads always open? a. Preaction b. Dry pipe c. Quick response d. Deluge Fire Detection, Alarm, & Suppression Systems - 29

32 INSTRUCTOR'S GUIDE PRACTICAL SKILLS These Lead Instructor Practical Skills are designed to provide the Lead Instructor for a Fire Fighter I and II course with a more detailed overview of the practical skills required of all students. The appropriate skills from NFPA are listed at the front of each skill's section. Although the skills from NFPA are written as Job Performance Requirements, these have been divided into individual skill elements. This is to allow for consistency in the evaluation of each skill element. Students must successfully complete each step of each practical skill during the practical skills evaluation portion of a Fire Fighter I and II course. At the time of a Fire Fighter I and II Certification Examination, the skill steps have been prioritized to allow a student to miss a predetermined number of steps. Fire Detection, Alarm, & Suppression Systems - 31

33 MISSOURI DIVISION OF FIRE SAFETY FIRE FIGHTER I & II PRACTICAL SKILLS Fire Detection, Alarm, & Suppression Systems Successful completion of the practical skills in this section are necessary to fulfill the requirements of the following sections of NFPA : Fire Fighter I Standard Conserve property as a member of a team, given salvage tools and equipment and an assignment, so that the building and its contents are protected from further damage Fire Detection, Alarm, & Suppression Systems

34 MISSOURI DIVISION OF FIRE SAFETY FIRE FIGHTER I & II PRACTICAL SKILLS Fire Suppression Systems - NFPA , Demonstrate Connecting to a Fire Department Connection Sill Objective: The candidate, given a supply of 2 1 / 2 " or 3" hose in an apparatus hose bed, shall connect two 50' sections of hose to a fire department sprinkler connection and the apparatus. The candidate shall then identify the normal minimum water pressure that should be applied to the sprinkler system. Students are allowed two chances at each skill for successful completion. Any step listed in italics missed shall result in failure of the skill. Otherwise, students are allowed to miss a maximum of one of the following steps and pass this skill. Items to be checked If the candidate 1. First, obtains necessary tools and equipment such as two spanner wrenches 2. Wears gloves during the skill 3. Removes 50 feet of hose from the hose bed neatly and in organized fashion 4. Connects female coupling to fire apparatus discharge 5. Connects male coupling to fire department sprinkler connection 6. Repeats steps 3, 4, & 5 7. Arranges all hose in an orderly fashion 8. Identifies that water pressure in hose lines should be a minimum of 150 psi Fire Detection, Alarm, & Suppression Systems - 33