Unformatted text preview: ire resistance. FIRE ZONES OF RECIPROCATING ENGINE: Based on the volume and smoothness of the air flow. This classification allow us to match the type of detection and extinguishing system to the fire condition. Class "A" Zone: Large quantities of air flowing post regular arrangements of similarly shaped obstruction. Ex. Power system air flow over cylinder. Class "B" Zone: Large quantities of air flowing past aerodynamically clean obstructions . Ex. Heat exchanger ducts. Exhaust manifold shrouds. Class "C: Zone: Relatively small air flow. Ex. Compartment behind fire wall. Class "D" Zone: Little or no air flow. Ex. Wheel well, inside of wing structure Class "X: Zone: Large volume of air at an irregular rate power plant portion. Most difficult to protect. Fire extinguishing agent twice than normal zone. TYPES OF FIRE DETECTORS: Used in light A/C. THERMAL SWITCH (SPOT TYPE SYSTEM): Switches are wired parallel with each other entire group is connected in series with indicator light. These switches are located at...
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- One '11
- Carbon monoxide, Fire extinguisher, thermo couple