Table of Contents

Carbon Dioxide as an Extinguishing Agent.
  General Scope of Protection.
  Kidde Automatic Fire Extinguishing System
     General Description - Standard Equipment.
     Standard Equipment,
     Accessory Equipment.
  Testing, Maintenance & Recharging.
  General Maintenance.

IMPORTANT: When calling Walter Kidde & Company, Inc.,
                         or a Kidde representative for emergency
                         cylinder replacement, please indicate
                         capacity of your cylinders and type of valve.

Carbon Dioxide as on Extinguishing Agent

  The Kidde Fire Extinguishing System uses carbon dioxide gas as the extinguishing agent. Carbon dioxide is a standard commercial product, being most commonly used for carbonating beverages, and is available in most of the large cities and seaports throughout the world.

  Carbon dioxide is normally colorless, except that, when discharging, it resembles a cloud of steam. When inhaled in small amounts, it produces a tingle in the nostrils the same as experienced when drinking soda water. It is a non-conductor of electricity, is non-corrosive, and non-injurious to all substances and, although heavier than air, it may be easily diffused and removed by ventilation. Unlike air, it does not contain oxygen in any form available for supporting combustion or for sustaining human life in breathing.

   "Fast" fires, such as engine room, oil, or paint fires, are quickly extinguished by flooding the area with carbon dioxide gas. This reduces the oxygen content and creates an inert atmosphere which smothers the fire. In addition to its smothering action, carbon dioxide is aided in extinguishing fire by its cooling effect.

Warning:  Since a person cannot breathe but will suffocate in an atmosphere
            of carbon dioxide, caution must be taken before entering any space
            filled with this gas. Thoroughly Ventilate the space into which the
            gas has been discharged to make certain that all portions contain
            only fresh air.

  If it be necessary for a person to enter a space before it is thoroughly ventilated, he may do so by using a fresh air mask or other type of self-contained breathing apparatus. DO NOT USE a filter type of mask or a canister gas mask. No one should enter such a space without a person as observer and standby located outside the space.

  Should a person be overcome by carbon dioxide, it is essential that he be immediately rescued from the space containing the gas. To revive a person so overcome, give him plenty of fresh air and apply artificial respiration (as in the case of drowning) without the use of carbon dioxide as a stimulant. Call a physician.

  The carbon dioxide is stored in liquid form in steel cylinders carefully tested for strength under governmental supervision. The pressure within the cylinder depends on the temperature, being 504 pounds per square inch at 32 degrees F and 850 pounds per square inch at 70 degrees F. The carbon dioxide content is never determined by using a pressure gauge. The amount of carbon dioxide in a cylinder can be determined only by the weighing of the cylinder.

  Each cylinder is provided with a safety relief disc which will release the gas before the pressure exceeds the cylinder test pressure. Cylinders should be stored in a cool place whenever possible. The maximum safe storage temperature for all cylinders up to and including 35 lb. capacity is 140 degrees F (6O degrees C), and for cylinders of 50 lb. capacity or over is 150 degrees F (65 degrees C). Special cylinders can be supplied for higher storage temperatures.

General Scope of protection

The Kidde Automatic Fire Extinguishing System described herein is designed to protect an enclosed marine hazard of specific maximum volume as indicated in the next column.

The system is intended principally to protect engine rooms and tank spaces on runabouts, cruisers, and yachts. Reducing the oxygen content of air (normally 21%) to 15% by introducing carbon dioxide will extinguish ordinary flammable liquid fires by smothering. The effectiveness of carbon dioxide gas in fire extinguishing depends upon the release of a sufficient volume of the gas to dilute the air adequately.

The following Volumes are based on recommendations of the United States Coast Guard for marine installations. Kidde packaged systems are designed to comply with those standards, but it is only by proper installation, test, and periodic maintenance that you will insure proper operation when a fire emergency occurs.

These charts follow here:

Max. Space Volume           Lbs. of Carbon
   in Cu. It.                         Dioxide Required

       140                                    10
       220                                    15
       300                                    20
Max. Space Volume           Lbs. of Carbon
  in Cu. Ft.                        Dioxide Required

    375                                       25
    525                                       35
    800                                       50
   1120                                     70
   1200                                     75
   1600                                    100
   2700                                    150
   4050                                    225
   6000                                    300

  The installation instructions in this manual should be accurately followed in order to provide the most efficient fire protection. It is especially important that the proper pipe and nozzle sizes be rigidly adhered to; these sizes have been calculated to give you a system acceptable to United States Coast Guard standards. All nozzles provided with the system should be used, and they should be installed as shown on the typical installation drawings. The nozzle sizes, quantities, and recommended placement have been set by Kidde engineers based upon experience gained from thousands o f installations in accordance with recognized application standards in order to provide maximum efficiency.

Kidde Automatic Packaged Fire Extinguishing System

General Description-Standard Equipment
The Kidde Automatic Packaged Fire Extinguishing System consists essentially of a supply of carbon dioxide stored under pressure in steel cylinders, a piping system to conduct the carbon dioxide to the protected hazards, Multi-jet nozzles within the hazard to distribute the gas, and an automatic detecting system which initiates discharge of the carbon dioxide upon abnormal rate-of-temperature-rise. The system is entirely self-contained in that no outside source of power is necessary.

Cylinder & VALVE Assembly
The carbon dioxide is stored in liquid form in steel cylinders, under pressure of 850 pounds per square inch at 70oF. The contents are retained within the cylinder by a flood valve originally produced to meet stringent Navy requirements. The operating principle of this valve is to utilize the pressure within the cylinder to effect release of the carbon

(Continued on page 231)

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