2-14. EXTREME COLD.
In freezing weather operation, the AFFF tank heater must be used at all times The heater is only designed to
maintain the temperature of the AFFF chemical agent above freezing in temperatures down to -40° F (-40° C)
The nitrogen cylinder pressure is affected by temperature changes See table 2-6 for recommended operating
pressures at various temperatures.
2-15. SALT AIR OR SEA SPRAY
Salt presents a serious corrosion problem and all equipment coming in contact with salt water or salt fog should be
flushed or sponged with fresh clean water as soon as possible then dried thoroughly.
2-16. DUSTY OR SANDY ENVIRONMENT.
In desert regions, protection should be provided to shield the Fire Suppression Equipment Set from blowing sand.
2-17. EMERGENCY PROCEDURES.
If either the AFFF or dry chemical system fails to operate or becomes inoperative dunng operation, the remaining system
may be used to extinguish the fire. The systems operate completely independent of each other.