FIELD: fireproofing. SUBSTANCE: method involves providing driving unit with hydraulic accumulators for supplying fire extinguishing liquid to spraying heads or sprayers; at the first stage, filling hydraulic accumulators with gas till practicable pressure is created; at the second stage, filling hydraulic accumulators with liquid under required initial charging pressure to compress gas till it acquires required initial charging pressure. Such method allows loss of forcing gas occurring during, for instance, leakage to be eliminated. EFFECT: increased efficiency and simplified method. 4 cl, 1 dwg
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