1) WillPositive pressure respiratorPlace the equipment box on the ground (note: the marked side of the equipment box is facing up), then open the box cover, undo the wiring harness fixing strap, and take out the wiring harness.

(2) Open the cylinder valve and loosen the handwheel of the cylinder valve counterclockwise by at least 2 turns. If gas is found to flow out of the gas supply valve after the cylinder valve is opened, press the throttle switch on the rubber cover of the gas supply valve, and the gas flow will stop. Attention: If the throttle switch on the gas supply valve is not pressed before opening the cylinder, air will freely flow out of the mask. At the same time, observe the pressure gauge reading, and the cylinder pressure should not be lower than 28 megapascals. If the cylinder is not filled with air, replace it with a cylinder filled with compressed air.

(3) The alarm detects that the bottle valve handwheel is rotating clockwise, the bottle valve is closed, the flushing valve is slightly open, and gas is released from the system. When the pressure drops to 5.50.5 megapascals, the alarm starts to sound, and stops when the pressure is less than 1 megapascal. When the air stops flowing, the flushing valve * closes (with the pointer on the knob facing up). Then reopen the cylinder valve. Warning: If the alarm fails to sound when the pressure drops to 5.50.5 megapascals, the equipment cannot be used and should be marked for authorized personnel to handle.

(4) Confirm that the cylinder clamp assembly firmly supports the cylinder; The cylinder bottom is facing towards oneself (the cylinder valve is away from oneself), and the body tilts forward. Remove and unfold the shoulder strap, and place it on both sides of the cylinder.

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