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System control mode and operation flow
System control mode There is three control methods: automatic, electric-manual and mechanical mergency manual control. 4.1.1 Automatic control: Set the fire alarm and extinguishing controller and water pump control cabinet in Ў°AutoЎ± mode, the system will be in automatic control state. When there is a fire, fire detector will send fire signal to fire alarm and extinguishing controller. Then fire alarm and extinguishing controller give off audible and visible signals as well as extinguishing command to open corresponding selector valve and pump set, the water mist will be discharged into protected zone. After extinguishing, press the reset button on fire alarm and extinguishing controller to close selector valve and water pump set, also press reset button of pressure switch to reset the system to servo state. 4.1.2 Electric-manual control: When fire is observed, press the corresponding start button on fire alarm and extinguishing controller or corresponding manual alarm button, the system will start and discharge water mist. After extinguishing, reset the manual alarm button or the reset button on fire alarm and extinguishing controller to close selector valve and pump set. Rest the pressure switch manually to reset the system to servo state. In auto state, the electric-manual control has priority. 4.1.3 Mechanical emergency controlЈє When fire alarm and extinguishing controller is out of work during fire, open the selector valve of corresponding protected area first, and switch the selector switch Ў°Manual/AutomaticЎ± of water pump control cabinet to Ў°Manual Ў±position, then press the start button on the pump control cabinet to spray water mist. After extinguishing, press the stop button on the pump control cabinet to shutdown water pump, and then reset the selector valve manually. Rest the pressure switch manually to reset the system to servo state. System operation flow
5 CRITICAL PIECES Selector valve 5.1.1 Structure ЈЁas follow diagramЈ©
Key technical parameters
Instruction Selector valve is mainly used in combined distribution system to control the agent flow direction and make sure that the agent be sprayed into fire protected area. It is installed on the distribution pipe with its outlet connecting to delivery pipe. Selector valve is normal close, can be started electrically and manually. Electrical start ЈєWhen a fire appears, the fire alarm and extinguishing controller will send DC24V active signal to open the selector valve, then the agent flows into the protected area via the selector valve. Manual startЈє Turn the start handle clockwise (or anticlockwise) by special tool to limiting position to open the selector valve The selector valve can reset automatically when power off if it is stated electrically. For manual open, turn the start handle to the position of Ў°№ШЈЁOFFЈ©Ў± to reset it manually XYK2/150 pressure switch 5.2.1 Structure: 5.2.2 Key parameters:
Instruction The pressure switch is fixed behind selector valve. It operates when the system releases agent and then send feedback signal to fire alarm and extinguishing controller, showing the agent has been released into certain protected area.
Check and reset it manually for later use after operation. ZSXTC nozzle 5.3.1 Structure:
5.3.2 Key parameters:
Water supply pump Overview High pressure plunger pump with safety overflow valve, buffer and filter, etc. Instruction There are inlets and outlets on both sides for installation. Foundation footing must be strong and big enough to make sure that the device will not go down, bend and distort after installation. Besides, the foundation should be horizontal to avoid device declining. Direction sign on the pump is to show the rotation direction. The pressure in inlet should be net positive. Do not start pump when there is no water in it. More details refer to Instruction Manual.
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