Document ZJK9JE6LYn40Zv90REJNdoywp

43--Fire Protection For CLASS A FIRES--Wood, paper, textiles, and the like Operation. Invert extinguisher, hold by bottom handle The lead stopple will drop from the bottle and allow the two chemicals to mix, CO, gas will be generated and will supply the pressure necessary' to discharge contents through the hose and nozzle Di rect the stream at the base of the fire, then follow up after the flames while working from s'de-to-Mde or around the fire if possible Maintenance Periodic external inspection and yearly discharge and recharge During recharge, check hose and nozzle for ob structions and defects, bent discharge elbow, corrosion, or other mechanical injury, and thoroughly wash out metal shell, hose, and nozzle Mix sodium bicarbonate and water solution m separate, clean container and strain into extinguisher The loose-fitting lead stopple must be on acid bottle to reduce hydroscopic action Caution Store in heated cabinet because antifreeze solution can not be used to protect from temperatures below 40 F, do not subject to temperatures above 120 F Fic 43-16 --Soda-acid fire extinguisher (No longer manufactured, hut leplacement parts are avadable ) COHSTANT-REACUM AIR PRESSURE CAUSE For CLASS A FIRES--Wood, paper, textiles, and the like Operation Can be operated intermittently by removing locking ring and squeezing combination operating lever-handle Extin guisher is pressunzed with air or inert gas through a hose line equipped with an automobile-type air chuck Charging pressures vary from 90 to 150 psi Direct the stream at the base of the fire, then follow up after the flames while working from side-to-side or around the fire if possible Maintenance. Check pressure, hose, and nozzle frequently When charging extinguisher, fill only to water level mark so there will be sufficient room for pressunzed air Some models have an overfill tube that ensures filling to the proper level When pressunzing, the gauge should indicate just above the full mark, then, when the pressure equalizes, it will not read less than full After charging, let it stand for 24 hr to check for leaks Caution Protect from freezing Be sure shell is the corrosiveresistant type before adding antifreeze charge Do not refill with loaded-stream charge unless extinguisher is designated as loadedstream type Fxc 43-17 --Stored pressure water fire extinguisher May be labeled "loaded stream" if charged with a special alkali-metal salt solution instead of water 1352