The water flow indicator is used for manual sprinkler system. It can be installed on the main water supply pipe or the cross bar water pipe to give the electric signal of water flow in a certain sub area and small area. The electric signal can be sent to the electric control box and can also be used to start the control switch of the fire pump.
Precautions for installation and use:
1. The water flow indicator shall be installed horizontally on the system pipeline, and shall not be installed on the side or upside down to prevent affecting the sensitivity of the water flow indicator.
2. The pipe connecting the water flow indicator must ensure that the length of the front and rear straight pipes is not less than 5 times of the pipe diameter. When selecting the water flow indicator, it should be selected according to the nominal diameter of the pipe and the technical parameter table.
3. Attention shall be paid to the direction of water flow during installation, and installation shall not be conducted in the direction of cutting.
4. The delay time of the water flow indicator can be adjusted when it leaves the factory, and the adjustment range is 2-90s.
The start of the spray pump is definitely not directly started by the signal valve and the water flow indicator. The pressure switch should be directly started manually. The signal of the pressure switch signal valve and the water flow indicator on the wet alarm valve should be sent to the alarm host of the alarm host. The alarm host receives the action signal of the water flow indicator and the pressure switch signal. The manual command linkage pump start signal valve is only used to indicate the valve switch status, and has nothing to do with the water pump
The pressure switch signal is controlled and output in two ways. The pump house directly starts the pump manually and sends it to the alarm host in the fire control center for alarm. If the remote control signal valve is not connected, the opening and closing state of the valve can never be indicated. If the valve is closed, it will never be displayed on the alarm host.
If the water flow indicator is not connected, it can never indicate that there is water flowing in the pipeline, nor can it indicate that the water pump is started with linkage
Therefore, it is required in the specification that both of them should be connected to the main alarm host to receive the action signal of the water flow indicator and the pressure switch signal, and manually command the linkage to start the pump
The function of the water flow indicator is to report the fire position in time, and the signal valve is to display the opening status of the valve
If there is no wiring, the fire protection should also talk. There is no need to be nervous. The signal butterfly valve only monitors an opening and closing signal. The water flow indicator is slightly more important. Some engineering designs have not ensured that there is no wrong action. The start logic of the spray pump is set as an alarm valve and a pressure switch. In addition, the action is to start the pump. During the fire acceptance, it is better to report to the leader whether the water flow indicator acts strictly after the end water test device is opened, It is better to monitor with input module
When there is water flowing through the water flow indicator, its auxiliary contact is closed, and then the signal is fed back to the host through the module. Now it is no longer necessary for him to participate in the linkage of the spray pump. When the signal valve is closed, a signal is fed back to the host through the module to indicate that the valve is closed.
Post time: Jul-05-2022