Guangzhou Automobile Toyota's multi-fire hydrant pool renovation centralized display solution

System Requirements Analysis
According to the trial version 4.2.2, Article 4, and 4.2.3, Article 9 of the "Regulations for the Inspection and Evaluation of the Installation Quality of Fire Protection Facilities in Buildings" (DB37/242-2008), the water level of the fire water pool and the fire water tank should be displayed in the fire control room. Based on fire regulations, ensuring the full water level of the fire water pool and the high-level fire water tank, and the importance of remote monitoring in the fire control room is crucial. If the fire control room does not have a liquid level display instrument for the fire water pool and the high-level fire water tank, according to the fire regulations, there is a high risk of failing the acceptance inspection of the building fire protection facilities installation quality assessment. Therefore, it is necessary to monitor the real-time liquid level of the fire water pool and tank in the fire control room, which requires the use of the WH311 fire water tank liquid level display.

System Overview
The WH311 liquid level sensor probe is directly placed at the bottom of the user's fire water pool or tank, and the WH6 fire-dedicated liquid level display is installed in the fire control room. They are connected by a 2*1.5 square shielded cable, displaying the real-time actual water level and having a built-in high and low liquid level alarm system to ensure the fire water level is always maintained at a high level.

Application Challenges:
1. Electromagnetic interference exists in the monitoring scene;
2. Requires stable and accurate product operation.

Solution Advantages:
  1. Provides a variety of product supporting schemes to cope with different working conditions;
  2. Customizable products to handle complex working conditions;
  3. Excellent product quality, high precision, high stability, and high protection level.

Project Description

The requirement to display the fire water tank level in the control room requires a transformation to an electronic automatic water replenishment system with real-time digital display of water level changes in the control room. It requires water replenishment to begin at 3.5 meters and stop at 5 meters.

I. Needs Analysis

Realizing intelligent control of automatic water replenishment is an important application of the WH311 intelligent liquid level controller, mainly using the relay switch output signal of the high and low liquid level alarm of the display and the hysteresis value setting to control it.

II. Scheme Design

Wiring Instructions:
1. Directly place the WH311 liquid level probe at the bottom of the fire water pool or fire water tank.
2. Connect the WH311 liquid level probe to the secondary instrument WH6 in the fire control room via a cable.
The control room provides a 220V power supply.
The power module of the display will automatically supply power to the WH311 liquid level probe.
The real-time current water level height is displayed on the screen.
Set the upper limit alarm value AH to "5 meters".
Set the hysteresis value to "1.5 meters" using the SET button to "HYA1" (start at 3.5 meters and stop at 5 meters; this value can be set by the user according to process requirements).

III. Application of Typical Cases

This solution has been successfully applied to:
1. Shenzhen landmark building - Ping An Finance Centre
2. Shenzhen Shuibei Jewellery Building Headquarters (with pictures)
3. GAC Guangzhou factory fire protection and life water pool renovation project
4. Xiamen-Shenzhen Railway Tunnel Fire Control Center
5. Zhangjiakou Huainan County High-speed Railway Station
6. Information Hub Building - Shenzhen Telecom Headquarters
7. Shenzhen Bay No. 1 Fire Water Pool Level Monitoring Project
8. Vanke Data Air Conditioning Water Cooling Liquid Level Monitoring Project (with pictures)
9. Shenzhen Jia Hua Domain Plaza

IV. On-site Construction Drawings

V. Product Photographs

VI. Product Certification (For detailed certification information, please visit: www.whsensors.com)

1. Inspection report from China Certification and Inspection Group
2. CE & FCC Certification
3. RoHS Certification
4. Third-party calibration certificate from TÜV SÜD
5. Shenzhen Metrology Institute 0.25-level inspection certificate

VII. Product List