Hochiki FirePro Xtinguish User manual

FirePro Xtinguish
Condensed Aerosol Fire Extinguishing System
Installation and Operation Manual
Hochiki America Corporation
7051 Village Drive, Suite 100
Buena Park, CA 90621-2268
714.522.2246 Corporate Headquarters
800.845.6692 Technical Support
http://www.hochiki.com
Version 1.05 - UL
Created: 09/05/2012
Revised: 11/17/2016
PN# 1700-11990
Read this installation and operation manual carefully before
installing the condensed aerosol generators!!

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FirePro Xtinguish I&O Manual V1.05 UL
1Introduction .................................................................................................................................................. 6
2Administration .............................................................................................................................................. 7
2.1 Scope ........................................................................................................................................................ 7
2.2 Purpose ..................................................................................................................................................... 7
2.3 Trademark and Patent ............................................................................................................................... 7
2.4 Units and Formulas ................................................................................................................................... 7
2.5 Referenced Publications ........................................................................................................................... 7
2.6 Definitions .................................................................................................................................................. 7
3Environmental Summary ............................................................................................................................. 8
3.1 Significant New Alternatives Policy (SNAP List) ....................................................................................... 8
3.2 Condensed Aerosol Environmental Parameters ....................................................................................... 9
4Safety Summary ........................................................................................................................................ 10
4.1 General .................................................................................................................................................... 10
4.1.1 Health Effects ................................................................................................................................... 10
4.2 Hazards to Personnel .............................................................................................................................. 10
4.2.1 Potential Hazards ............................................................................................................................. 10
4.2.2 Pre-Discharge Alarms and Time Delay ............................................................................................ 11
4.2.3 Egress ............................................................................................................................................... 11
4.2.4 Reduced Visibility ............................................................................................................................. 11
4.2.5 Toxicity .............................................................................................................................................. 11
4.2.6 Thermal Hazards .............................................................................................................................. 11
5Condensed Aerosol Fire Extinguishing Action .......................................................................................... 12
5.1 FirePro® Condensed Aerosol Fire Extinguishing Reaction Sequence .................................................... 13
5.2 Particle Distribution in the Aerosol Phase ............................................................................................... 14
6FirePro® Xtinguish Condensed Aerosol Fire Use and Limitations ............................................................. 15
6.1 Systems ................................................................................................................................................... 15
6.2 Use and Application ................................................................................................................................ 15
6.3 Environmental Factors ............................................................................................................................ 16
6.4 Compatibility with Other Agents .............................................................................................................. 16
7Condensed Aerosol Generator Description ............................................................................................... 17
7.1 General Description of the Aerosol Generator Units ............................................................................... 17
7.1.1 The Solid Aerosol-Forming Compound FPC: ................................................................................... 17
7.1.2 The Ignition Device (Initiator): ........................................................................................................... 17
7.1.3 The Cooling Mechanism: .................................................................................................................. 17
7.1.4 The Housing (External Steel Casing): .............................................................................................. 18
7.1.5 The Mounting Brackets: .................................................................................................................... 18
7.1.6 The End Plate Discharge Outlets: .................................................................................................... 18
7.1.7 The Seal ........................................................................................................................................... 18
7.2 Aerosol Generator Components.............................................................................................................. 19
8Total Flooding Systems Design ................................................................................................................. 21

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8.1 Working Documents ................................................................................................................................ 21
8.1.1 Specifications.................................................................................................................................... 21
8.1.2 Working Plans................................................................................................................................... 21
8.1.3 Approval of Plans ............................................................................................................................. 22
8.2 Enclosure ................................................................................................................................................. 22
8.2.1 Loss of Agent .................................................................................................................................... 22
8.3 Condensed Aerosol System Agent Supply ............................................................................................. 23
8.3.1 Quantity ............................................................................................................................................ 23
8.4 Design Application Density ...................................................................................................................... 23
8.4.1 Determining Design Application Density .......................................................................................... 23
8.4.2 Fuel Types: ....................................................................................................................................... 23
8.5 Total Flooding Quantity ........................................................................................................................... 25
8.5.1 Quantity Calculation ......................................................................................................................... 25
8.5.2 Additional Design Factors ................................................................................................................. 25
8.5.3 Duration of Protection ....................................................................................................................... 25
8.5.4 Discharge Time................................................................................................................................. 25
8.5.5 Extended Discharge ......................................................................................................................... 25
8.5.6 Safety Vents ..................................................................................................................................... 25
8.5.7 Generator Choice and Location........................................................................................................ 26
8.6 Preparing the Enclosure Prior to Aerosol Discharge............................................................................... 26
8.7 Working in a Room or Enclosure Protected by FirePro Xtinguish .......................................................... 26
9Condensed Aerosol Fire Extinguishing System Arrangement .................................................................. 27
9.1 Minimum Safe Distances ......................................................................................................................... 27
9.2 Safety Requirements ............................................................................................................................... 27
9.3 Electrical Clearances ............................................................................................................................... 28
9.4 Precautions While Handling the Generator Units.................................................................................... 28
9.5 Storage and Transport ............................................................................................................................ 29
9.6 Storage Conditions .................................................................................................................................. 29
9.7 Replacement / Removal from Service ..................................................................................................... 29
10 Detection, Actuation, Alarm and Control Systems ................................................................................ 30
10.1 General .................................................................................................................................................. 30
10.2 Raceways .............................................................................................................................................. 30
10.3 Automatic Detection .............................................................................................................................. 30
10.4 Operating Devices ................................................................................................................................. 30
10.5 Fire Alarm Control Panel ....................................................................................................................... 31
10.6 Operating Alarms and Indicators ........................................................................................................... 31
10.7 Warning Devices ................................................................................................................................... 31
10.8 Abort Switches....................................................................................................................................... 32
10.9 Alarms Indicating Failure of Supervised Devices and Equipment ........................................................ 32
10.10 Warning and Instruction Signs ............................................................................................................ 32

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10.11 Pre-Discharge Alarms and Time Delays ............................................................................................. 32
10.12 Unwanted System Operation .............................................................................................................. 32
11 Total Flooding System – Installation Examples .................................................................................... 33
11.1 General .................................................................................................................................................. 37
11.2 FirePro® Condensed Aerosol Generator Installation Procedure ........................................................... 38
11.2.1 FNX-20 Installation Details ............................................................................................................. 38
11.2.2 FNX-40 / FNX-80 / FNX-100S / FNX-200S Installation Details ...................................................... 39
11.2.3 FNX-500S Installation Details ......................................................................................................... 39
11.3 Wiring Connections to the FirePro Xtinguish Aerosol Generators ........................................................ 40
11.4 Condensed Aerosol Generator Height Limitations ................................................................................ 46
11.5 Condensed Aerosol Generator Initiation (Activation) ............................................................................ 46
11.5.1 Automatic Activation by means of a Fire Detection System ........................................................... 46
12 Hochiki HCVR-3 Releasing Fire Alarm Control Panel .......................................................................... 48
12.1 System Components ............................................................................................................................. 48
12.2 System Layout ....................................................................................................................................... 50
12.3 HCVR-3 Connection Overview .............................................................................................................. 51
12.3.1 Detection Zones and Notification Appliances ................................................................................. 51
12.3.2 HCVR-SQA Sequential Activator.................................................................................................... 51
12.3.3 Disconnect Switch (Hochiki America model HCVR-DS or SOM-R-DS) ......................................... 55
12.4 eLAN RS-H Analog/Addressable Releasing Control Panel .................................................................. 56
13 Total Flooding System Commissioning ................................................................................................. 57
13.1 General .................................................................................................................................................. 57
13.2 Installation Acceptance ......................................................................................................................... 57
13.2.1 Basic Checks .................................................................................................................................. 57
13.2.2 Review Enclosure Integrity ............................................................................................................. 57
13.2.3 Review Electrical Components ....................................................................................................... 57
13.2.4 Functional Testing .......................................................................................................................... 59
13.2.5 System Hand-Over to Client ........................................................................................................... 60
14 Total Flooding Systems Inspection and Maintenance .......................................................................... 61
14.1 Inspection .............................................................................................................................................. 61
14.2 Enclosure Inspection ............................................................................................................................. 61
14.3 Maintenance .......................................................................................................................................... 61
14.4 Penetrations .......................................................................................................................................... 61
14.5 Condensed Aerosol Generator Inspection ............................................................................................ 61
14.6 Training .................................................................................................................................................. 62
14.7 Safety .................................................................................................................................................... 62
15 Total Flooding System Post-Discharge Intervention ............................................................................. 63
15.1 Residue Removal .................................................................................................................................. 63
15.2 Guidelines to Clean the Residue of Condensed Aerosol ...................................................................... 63
15.3 Pre-Discharge and Post-Discharge Steps ............................................................................................ 64

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15.4 Additional Information on Cleaning Electronic Components ................................................................. 64
15.5 Dismantling FirePro® Condensed Aerosol Generators.......................................................................... 65
15.6 Waste and Environment ........................................................................................................................ 65
16 Appendix A – Material Safety Data Sheets (MSDS) ............................................................................. 66
17 Appendix B – FirePro Xtinguish Aerosol Generators ............................................................................ 70
18 Appendix C – FirePro Xtinguish Generator Datasheets ....................................................................... 71
19 Appendix D – FirePro Xtinguish Generator Drawings ........................................................................... 90
20 Appendix E – Referenced Publications ............................................................................................... 109
21 Appendix F – Definitions ..................................................................................................................... 110

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FirePro Xtinguish I&O Manual V1.05 UL
1Introduction
This manual is written for those who are installing a FirePro Xtinguish condensed aerosol fire extinguishing system
for total flooding applications.
Hochiki America Corporation assumes no responsibility for the application of any system other than those
addressed in this manual.
The technical data contained in this manual is strictly limited for information only. Hochiki America
Corporation believes this data to be accurate, but it is published and presented without any warranty or
guarantee whatsoever. Hochiki America Corporation disclaims any liability for any use that may be made of
the data and information contained herein by any and all other parties.
IMPORTANT NOTICES
Warranty Disclaimer
Hochiki America Corporation makes no guarantees of any kind, either express or implied, including but
not limited to warranties of the FirePro Xtinguish products for their fitness for a particular purpose.
Limitation of Liability
In no event, regardless of cause, shall Hochiki America Corporation be liable for any indirect, special,
incidental, punitive, or consequential damages of any kind, even if advised of the possibility of such
damages.
Any questions concerning the information presented in this manual should be addressed to:
Hochiki America Corporation
7051 Village Drive Suite 100
Buena Park, CA 90621
United States of America
Phone: [phone], Fax: [phone]
E-mail: [e-mail]
Note: this manual quotes directly from NFPA standards, including NFPA 2010
(2015 Edition) and NFPA 72 (2010 Edition). These standards, along with other
national and local codes and requirements, must be carefully followed at all
times during all phases of system design, installation, operation and
maintenance.
The FirePro Xtinguish and HCVR-3/eLAN systems must be
installed, serviced and maintained only by Hochiki America
factory-trained and authorized technicians.

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FirePro Xtinguish I&O Manual V1.05 UL
2Administration
2.1 Scope
This manual is a comprehensive guide that contains all the necessary information to design, install, operate
and maintain a FirePro Xtinguish condensed aerosol fire extinguishing system for total flooding
applications.
This manual does not address information related to fire detection.
2.2 Purpose
This manual is prepared and intended for use by those charged with purchasing, designing, installing,
operating, and maintaining condensed aerosol fire extinguishing systems. This manual provides basic
guidance designed to supplement factory-certified training, with the goal that the system will function as
intended for its lifetime. Authorized Hochiki training is necessary and required to design, install, operate
and maintain the FirePro Xtinguish system! Do not attempt to install or service this system if you have not
been provided with authorized training!
The requirements of this manual are considered necessary to provide a sufficient level of protection from
loss of life and property from fire. The manual reflects the state of the art at the time it was issued.
2.3 Trademark and Patent
FirePro Xtinguishcondensed aerosol fire extinguishing systems for total flooding applications is a
registered trade mark of Hochiki America Corporation
FirePro Xtinguishcondensed aerosol fire extinguishing systems for total flooding applications is a
proprietary patent of:
Celanova Limited,
Cyprus Registered Company, Certificate of Incorporation no. HE 142136
6, Koumandarias & Spyrou Araouzou Str.
Tonia Court II, 6th Floor,
3036 Limassol
Cyprus
P.O.Box 54080 Limassol-3720, CYPRUS
Phone: [phone], Fax: [phone]
2.4 Units and Formulas
Metric units of measurement in this manual are in accordance with the modernized metric system known
as the International System of Units (SI). See IEEE/ASTM SI 10, Standard for Use of the International
System of Units (SI): The Modern Metric System.
The values in this manual are given in SI. If followed by an equivalent value in other units, the first stated
in SI is to be considered as the requirement; the equivalent value in other units could be approximate.
2.5 Referenced Publications
Referenced Publications as per NFPA 2010 shall apply to this manual. See Appendix “E”
2.6 Definitions
Definitions as per NFPA 2010 shall apply to this manual. See Appendix “F”

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3Environmental Summary
3.1 Significant New Alternatives Policy (SNAP List)
Submission to the U.S. Environmental Protection Agency's (EPA) SNAP Program. The SNAP Program
was originally outlined in 59 FR 13044.
Significant New Alternative Policy
SNAP List Listed
Protection of Stratospheric Ozone: Listing of Substitutes for
Ozone-Depleting Substances--Fire Suppression and Explosion
Protection
Direct Final Rule – Acceptable Substitute:
Powdered Aerosol E
The official EPA document, issued by the Federal Register, is available at Vol. 71, No. 187/ Wednesday,
September 27, 2006/ Rules and Regulations.
Under paragraph II, Listing Decisions: Fire Suppression and Explosion Protection – Total Flooding, at
pages 56363/56364.
C. Powdered Aerosol E – Acceptable subject to use conditions.

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3.2 Condensed Aerosol Environmental Parameters
Environmental parameters FirePro Xtinguish
ODP
(Ozone Depletion Potential) Zero
GWP
(Global Warming Potential) Zero
ALT
(Atmospheric Life Time) Negligible
Toxicity for human life Very low within the
parameters for use
Electrical conductivity Nil up to 75KV
Corrosion Negligible within the
parameters for use
Extinguishing efficacy High
Oxygen depletion after agent
discharge
Negligible within the
parameters for use

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4Safety Summary
For Material Safety Data Sheet refer to Appendix A
4.1 General
The discharge of an aerosol extinguishing system could potentially create a hazard to personnel
due to the nature of the aerosol. Unnecessary exposure of personnel to the agent, the by-products
generated by the fire, and the fire itself should be avoided.
4.1.1 Health Effects
The potential adverse health effects are minimal as:
 Hazard for humans related to the FPC (FirePro solid aerosol forming compound) has not been
found.
 Hazard to humans related to the aerosol released by the reaction of the solid compound
(FPC) have not been established because the TLV’s are not applicable. However, it is
reputed that hazards to humans are not present when the aerosol is applied as guided by this
manual.
 Signs and symptoms related to the aerosol phase are only referred to for acute exposure and
/or chronic overexposure. In a real life situation the exposure to the generated aerosol will
only occur accidentally and the exposure time will be very short, as in the event of an
accidental or unexpected discharge when an occupant of the protected space has not
evacuated previously. The aerosol extinguishing system shall be installed in normally
unoccupied spaces and /or in spaces where personnel may be present utilizing suitable
safeguards.
4.2 Hazards to Personnel
4.2.1 Potential Hazards
Potential hazards to be considered for individual systems in the protected space and other areas where
the aerosol agent can migrate are the following:
 Noise:
The discharge of a system or aerosol generator may cause noise loud enough to be startling but
insufficient to cause traumatic injury.
 Turbulence:
The high-velocity discharge from generator outlets may cause enough turbulence inside the
protected enclosure to move unsecured paper and light objects.
 Reduced Visibility
When activated, the condensed aerosol generators reduce visibility both during and after the
discharge period.
 Thermal hazard:
The condensed aerosol discharges at elevated temperatures. Depending on the intended
application(s) of the aerosol system, the temperature and minimum clearance from the discharge
outlet are specified by the generators’ data sheets. Immediately after discharge, the aerosol
generators can be hot; protective gloves should be worn by personnel handling generators after
discharge.
 Eye irritation:
Direct contact with the aerosol solid particles being discharged by the system can result in irritation
of the eyes. Exposure of the condensed aerosol to the eyes should be avoided.

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4.2.2 Pre-Discharge Alarms and Time Delay
Human exposure to the FirePro Xtinguish condensed aerosol agents shall be prevented by
providing a warning of a pending discharge, and a delay prior to the discharge, to allow personnel
to exit the protected space. Suitable exits shall be provided to assure safe egress of personnel,
in case of failure of the pre-discharge alarm and/or the time delay.
4.2.3 Egress
Suitable egress shall be provided to allow the personnel to exit the protected space within the time delay.
The effect of reduced visibility on egress time shall be considered.
4.2.4 Reduced Visibility
The discharged FirePro Xtinguish condensed aerosol will cause occupants to evacuate the protected
space under conditions of low visibility. Appropriate safety measures shall be used so that occupants
can evacuate safely. The safety measures shall include, but are not limited to:
 personnel training,
 goggles,
 audio devices,
 floor mounted directional lighting,
 evacuation plans and exit drills.
4.2.5 Toxicity
See the Material Safety Data Sheet contained in Appendix A and the information in section 3.2 of this
manual.
4.2.6 Thermal Hazards
FirePro Xtinguish condensed aerosol generators shall not be employed at less than the minimum safe
distance from personnel and combustible materials. See the aerosol generator datasheets for minimum
safe distance information.
Protective gloves shall be worn by personnel removing discharged aerosol generators.

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FirePro Xtinguish I&O Manual V1.05 UL
5Condensed Aerosol Fire Extinguishing Action
Traditionally, there were three distinct elements assumed as necessary for combustion: heat, fuel, and
oxygen, popularly known as the “fire triangle”.
Typical fire extinguishment involves removing the fuel from the fire, limiting oxygen to the fire
(smothering), or removing the heat (quenching).
This physical theory had to be modified as halons became more widely used and better understood.
The halons, as well as other agents like the FirePro Xtinguish condensed aerosol, do not extinguish fire
in any of these ways, but instead break up the uninhibited chain reaction of the combustion process.
This extinguishing mechanism is not completely understood, yet there is definitely a chemical reaction
that interferes with the combustion process by removing the active chemical species involved in the flame
chain reaction.
Upon activation, the FPC (patented solid compound contained in the FirePro condensed aerosol
generators), immediately starts a chemical reaction that in few seconds produces condensed dry aerosol
in the discharge density defined by the system designer (i.e. potassium compounds, K2CO3, H2O, N2,
CO2, and other gas particles in small quantities). The condensed aerosol thus generated consists of
micro-sized particles of potassium compounds suspended in inert gases in an extremely high ratio
between the exposed surface and their reaction mass.
The FireProXtinguish condensed aerosol then remains in suspension for a relatively long time into the
protected volume, allowing its active inhibitor to flow into the combustion core transported by its own
natural convection currents and breaking the chain reaction upon flame contact with extremely high
efficiency.
Potassium is an alkaline metal and requires the least amount of energy for ionization because of its very
low ionization potential. Therefore a certain amount of energy is removed from the combustion itself to
eliminate the atom’s electrons during this ionization process. This is the physical action of the
extinguishing process of FirePro Xtinguish condensed aerosol.
The chemical process of the condensed aerosol fire extinguishment is characterized by certain reactions
in rapid sequence taking place between atoms and fragments of unstable molecules, which is called
“chain reactions of radicals”.
Since the radicals are unstable, they tend to reach a final stable condition. The stable final products,
among others, are carbon dioxide (CO2) and water (H2O).
The potassium atoms derived by the disassociation of the potassium compounds contained in the
FirePro Xtinguish condensed aerosol, react during combustion with the free radicals of unstable
hydroxides forming potassium hydroxide (KOH), which is a very stable compound.
At this stage the chain reaction of the free radicals is halted and the flame is extinguished.
The reaction sequence is shown on the following page.

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5.1 FirePro Xtinguish Condensed Aerosol Fire Extinguishing Reaction Sequence
Oxidation of hydrogen in the flames:
H2 + O2 → 2 OH-
OH- + H2 → H2O + H+
H+ + O2 → OH- + H+
O- - + H2 → OH- + H+
Oxidation of carbon monoxide in the flame:
H2 + O2 → 2 OH-
OH- + CO+ + → CO2 + H+
H+ + O2 → OH- + O- -
Therefore, in the flame, during combustion,
further to water and carbon dioxide (stable), only
unstable hydroxyl radicals are formed which allow the reaction to continue (phenomenon of auto
catalysis).
The chain reaction is interrupted by the
Potassium atoms, which react with the unstable
hydroxyl as follows:
OH- + K+ → KOH (and flames are thus
extinguished)
Notice that the potassium hydroxide (KOH) is
formed in quantities smaller than micrograms.
The KOH reacts further in the presence of CO2
and form K2CO3.
During this process we can verify that the
extinguishing action of potassium compounds is
not achieved either through smothering or
quenching but through a reaction in presence of
flame with consequent termination of the chain
reaction.
Legend:
H
2
Hydrogen stable
O2
Oxygen stable
OH-
Hydroxyl radicals unstable
H2O
Water stable
H+
Hydrogen atoms unstable
O—
Oxygen atoms unstable
CO+ +
Carbon monoxide unstable
CO2
Carbon dioxide stable

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5.2 Particle Distribution in the Aerosol Phase
The FirePro Xtinguish condensed aerosol phase consists of a gas phase with micro sized solid particles
in suspension.
Laser beam diffraction tests analyses have shown the correlation between solid and gaseous components
of 52% solid and 48% gas.
The percentage distribution of the solid compounds as per their diameter’s size expressed in microns is
as follows
Particle’s size (dia. μm) Percent %
< 1 52
1 ÷ 2 19
2 ÷ 5 17
> 5 12

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FirePro Xtinguish I&O Manual V1.05 UL
6FirePro Xtinguish Condensed Aerosol Fire Use and Limitations
6.1 Systems
The FireProXtinguish condensed aerosol systems shall be installed to protect hazards within the
limitations that have been established by this installation manual.
6.2 Use and Application
FirePro Xtinguish condensed aerosol extinguishing systems are effective in extinguishing Class A, B, and
C fires.
FirePro Xtinguish condensed aerosol extinguishing systems provide an efficient and effective means to
extinguish gas and liquid fires, burning solid substances, burning substances derived from hydrocarbons
(natural gas, oil products, flammable lubricants, etc.), as well as fires in electrical equipment with an
operating voltage not exceeding 75,000 Volts.
FirePro Xtinguish condensed aerosol extinguishing systems shall not be used to protect areas, hazards
or spaces containing flammable liquids, vapors, or dusts that may form an explosive air/fuel mixture unless
they have been tested to the satisfaction of the authority having jurisdiction and/or proven by experimental
testing carried out by a third party laboratory.
FirePro Xtinguish condensed aerosol extinguishing systems shall not be used on metal fires, on
substances generating self-sustaining combustion, and on the following substances unless they have been
tested to the satisfaction of the authority having jurisdiction and/or proven by experimental testing carried
out by a third party laboratory.
 Deep seated fires in Class A materials
 Class D fires:
 D1 - light metals (aluminum - Al; magnesium - Mg Titanium ...)
 D2 - alkali metals (potassium - K; natrium - Na; lithium - Li ...)
 D3 - organic-metallic compounds (methyl magnesium chloride - CH3MgCl; methyl magnesium
iodide - CH3MgJ; triethyl aluminum - (C2H5)3Al...)
 Metal hydrides (aluminum hydride - AlH3) lithium hydride - LiH ...)
 Reactive metals such as, lithium, sodium, potassium, magnesium, titanium, zirconium, uranium, and
plutonium.
 Chemical compounds containing oxidizers such as sodium chlorate or sodium nitrate.
 Certain chemicals or mixtures of chemicals, such as cellulose nitrate and gunpowder, that are
capable of rapid oxidation in the absence of air
 Chemicals capable of undergoing auto-thermal decomposition, such as certain organic peroxides
and hydrazine
The above list may be not exhaustive. Contact Hochiki America Corporation or your local Hochiki
America dealer if additional information is required.
The FirePro Xtinguishcondensed aerosol generators shall not be employed at less than the minimum safe
distances specified in the present manual (see the aerosol generator datasheets for details).
The minimum safe distance between the FirePro Xtinguish condensed aerosol generator discharge ports
and personnel shall be based on an aerosol agent discharge temperature, at that distance, not exceeding
75°C (167° F). See Appendix C for generator datasheets and minimum safe distance information.
The minimum safe distance between the FirePro Xtinguish condensed aerosol generator discharge ports
and combustible materials shall be based on an aerosol agent discharge temperature, at that distance, not
exceeding 200°C (392° F). See Appendix C.

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FirePro Xtinguish I&O Manual V1.05 UL
The total flooding FirePro Xtinguish condensed aerosol extinguishing system shall be installed in
enclosures protecting the hazards that allows the specific agent design application density to be achieved
and maintained for the specified period of time.
Where the FirePro Xtinguish condensed aerosol extinguishing agents are used in spaces containing
sensitive equipment, the potential adverse effects of FirePro Xtinguish condensed aerosol particulate
residue shall be considered.
6.3 Environmental Factors
Despite that condensed aerosol extinguishing systems do not represent any significant environmental
concern the unnecessary emission of aerosol extinguishing systems shall be avoided. All phases of design,
installation, testing, and maintenance of condensed aerosol extinguishing systems shall be performed with
the goal of no emission to the environment.
6.4 Compatibility with Other Agents
Unless specifically approved, systems employing the simultaneous discharge of different agents to protect
the same enclosed space shall not be permitted. Where unrelated extinguishing or suppression systems
are provided, and can operate prior to, or during the hold time of the FireProXtinguish condensed aerosol
extinguishing systems, the other agent shall not adversely affect the aerosol.

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7Condensed Aerosol Generator Description
7.1 General Description of the Aerosol Generator Units
The range of condensed aerosol generators is shown in the appendix “B”.
The condensed aerosol generator is formed by the following main components:
7.1.1 The Solid Aerosol-Forming Compound FPC:
The solid aerosol-forming compound FPC is the originator of the condensed extinguishing aerosol
(generated by the FPC activation):
Upon actuation, the solid aerosol-forming compound FPC will undergo a combustion reaction
generating the fire extinguishing condensed aerosol.
FirePro Condensed Aerosol composition
Compound Chemical
Formula CAS # % by Weight
Gas
Carbon Dioxide CO2 124-38-9 13%-14%
Nitrogen N2 7727-37-9 21%-22%
Water Vapor H2O 7732-18-5 10%-12%
Carbon Monoxide
Methane
Hydrogen
CO
CH4
H2
1%-2%
Particulate
Potassium Carbonate K2CO3 584-08-7 47%-49%
Potassium Nitrate KNO3 7757-79-1 2%-3%
Potassium Chloride KCl 7447-40-7 < 1%
Other elements See KEMA
report
--- < 1 %
7.1.2 The Ignition Device (Initiator):
FirePro Xtinguish condensed aerosol generators are initiated by applying the appropriate voltage
across the electric wire terminals of the aerosol generator so that the solid aerosol forming compound
will be activated and transformed into the condensed aerosol (the extinguishing agent).
7.1.3 The Cooling Mechanism:
FirePro Xtinguish condensed aerosol generators are equipped with a physical heat-absorbing
mechanism (the cooling mechanism). The generated aerosol will exit the generator via the cooling
mechanism, and the condensed aerosol will be cooled down before flooding the protected volume.

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7.1.4 The Housing (External Steel Casing):
The FirePro Xtinguish condensed aerosol generator casing is formed by a non-pressurized
container. The aerosol is generated by a reaction (combustion process) of the solid aerosol-forming
compound FPC, and the condensed aerosol is then carried by gases generated by this reaction.
7.1.5 The Mounting Brackets:
Mounting brackets are provided for each FirePro Xtinguish condensed aerosol generator, allowing
the generator appropriate orientation. The mounting brackets are constructed by galvanized carbon
steel plate of suitable shape and strength to hold the FirePro Xtinguish condensed aerosol
generators.
7.1.6 The End Plate Discharge Outlets:
The end plate discharge outlet holes ensure a smooth and fast discharge of the aerosol.
7.1.7 The Seal
A special membrane of adhesive polymer sheet is applied internally at the discharge outlets,
protecting against the entry of moisture, dirt, or anything undesirable. The membrane will be broken
by the generated FireProXtinguish condensed aerosol when the unit is activated.

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FirePro Xtinguish I&O Manual V1.05 UL
7.2 Aerosol Generator Components
FirePro Xtinguish Unit Components FirePro Xtinguish Unit Designations

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FirePro Xtinguish I&O Manual V1.05 UL
FirePro Xtinguish Initiator (electrical activator)
The initiator is connected to the activation power circuit (minimum current required 0.8 A for 3 - 4
seconds) by heat resistant wires. The activation power will heat up the electric coil (4) thus the
(5) solid aerosol forming compound (FPC) will initiate an exothermal reaction. The
heat developed
will transfer through the cylinder (7) outlets starting the exothermal reaction of the (9) FPC,
thus
the thermal energy will be sufficient to start the reaction of the whole mass of FPC
contained
inside the aerosol generator, transforming the FPC into a particulate aerosol and carrier gases.
Initiator cut-off view Legend
1 heat resistant wires (feed)
2 steel housing
3 polymeric resin
4 electric coil
5 FPC (solid compound)
6 chemical stabilizer
7 cylinder with 2 outlets
8 sealing
9 FPC (solid compound)
10 lacquered surface
Electrical values
Bridge Resistance 1.6-3.0 Ohms( Ω)
Ignition Pulse From 1- 2 mWs/Ω
No Fire Value < 20 mA t = 300s
Direct Current (DCV) 6-36V / 0.8 A
Ignition Time 3 - 4 sec.
Working Temperature (not to exceed)
Deployment
Temperature -54° C to 100° C
Storage Temperature -54° C to 54° C
The initiator is a standard component of all the aerosol generators