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Design of water leakage detection and alarm system for machine room
How to design the water leakage detection and alarm system in the engine room? Xiao Bian summarized the following methods for your reference, hoping to help readers.
First, the design of the leak detection system
The site of the survey, the design of the leakage sensor selection and layout, the choice of multi-zone separate monitoring or single-area monitoring, the design principle is to achieve effective, timely and reliable detection of water leakage; for multi-zone automatic conversion box. The detection cable is used for detecting water leakage; the guide line and the interface box are used as a connection between the 4-zone monitoring screen and the detection cable.
(1) Mainly used monitoring and detecting equipment for detecting objects and scenes
1. Monitoring system: The main functions of the 4-zone control panel 4-zone monitoring screen are adopted:
(1) It can simultaneously display water leakage or system failure alarms in multiple areas;
(2) can display specific water leakage areas;
(3) With sound and light alarm function: When there is water leakage or/and system failure in the detection area, the indicator light on the controller flashes, so that it can be visually seen whether water leakage or system failure occurs;
(4) Provide 10 dry contact outputs: overall leak alarm dry contact output and system fault dry contact output, water leakage in each area and system fault dry contact output;
(5) Various types of detectors can be used together.
2, the device's water leak detection: the use of Lean detection cable. The main function of the detection cable:
(1) Detection of water and various liquids (except oil removal);
(2) The length of the regional setting can be configured according to the site conditions, and there is no length limit;
(3) Reusable;
(4) It is easy to replace after damage, just replace the damaged part without replacing the entire detection cable.
(II) Implementation plan
1. The whole monitoring system is divided into 4 parts and monitored by the 4-zone monitoring screen. When water leakage occurs, the water contacts the detection cable, and the 4-zone monitoring screen emits an audible and visual alarm and triggers the relay;
2. When water leakage occurs, the specific part of the air conditioner leakage can be directly seen on the monitoring screen of the 4th zone, and the leakage of other pipelines can be displayed at the same time; When the A air conditioner leaks, the first area of ​​the monitoring screen is displayed, and an audible and visual alarm is issued;
When the B air conditioner leaks, the second area of ​​the monitor screen is displayed, and an audible and visual alarm is issued; when the C air conditioner leaks, the third screen of the monitor screen is displayed, and an audible and visual alarm is issued; when the new fan leaks, the fourth screen of the monitor screen is displayed and issued. Sound and light alarm; when all air conditioners leak and new fans leak, the first, second, third and fourth zones of the monitor screen display and sound and light alarms;
3, 4 zone monitoring screen provides dry contact output signal (relay), which can output signal to monitoring system, building management system, remote alarm;
4. Installation: Place the detection cable around the bottom of the air conditioner and around the tuyere of the new fan.
Second, the main difference between the water leakage detection sensor
1. Water leakage detection belt:
It is economical and can be used with the Lean series leak sensor controller. It can be used in any way and any length, and can only detect leak detection in a single area.
2. Water leakage detection cable:
It is more powerful and can be used with the Lean series leak sensor controller. It can be used in any way and any length, and can be used for leak detection in up to 8 areas.
3, mat leak detection sensor:
Can be used to wrap around pipe corners, or some irregular objects, or placed in some narrow special venues, can only be used for single-zone leak detection, and can be used with any Lean series leak sensor controller.
4, tubular leak detection sensor:
Commonly used for leaks in the middle of pipelines, as well as some special site selection, can only be used for single-zone leak detection, and can be used with any Lean series leak sensor controller.
5. Oil leakage detection sensor:
Applicable to oil leak detection, can be used with any Lean series leak sensor controller as a single area oil leak detection, other areas can be leak detection.
6, leak detection can be integrated into the machine room centralized monitoring
The Lai's leak detection system can be integrated into a unified monitoring system for centralized monitoring along with other intelligent monitoring systems. The Lai's leak detection controller provides basic communication protocols and an RS232 interface to interface with other monitor devices.
Third, multi-zone water leak detection how to determine the location of the leak
Lean's leaky multi-zone monitor series and Lai's leak detection 128 series monitor monitor screens can display the occurrence of water leakage in each area and the area where the system alarm occurs. According to the display on the monitor screen, you can find the corresponding area to eliminate water leakage and other system failures.
For example, the multi-zone monitor monitor screen displays the red light flashing in the fifth area, the “leak†red light flashes, the buzzer sounds, and the fifth area leak alarm is known immediately. According to the label, the fifth area belongs to the precision air conditioner of the UPS room. Drainage pipe, so as long as you look at the drainage pipe of the precision air conditioner in the UPS room to eliminate the cause of water leakage, the system can be restored to normal. The Lai's leaky multi-zone series and the 128 series have an obvious advantage: the water leakage alarms in each area Do not interfere, do not affect each other, and the various functions between the regions are independent.