Fresh air system is an important facility in modern buildings, its efficient operation and long-term stability are the key to maintain indoor air quality. Although the fresh air system has good stability and durability, long-term operation still requires regular overhaul and maintenance to ensure the normal operation of the system. Below, the steps and key points of how to overhaul the fresh air system in the later stage will be elaborated.

First, clarify the purpose and importance of maintenance
Before carrying out the overhaul of the fresh air system, we must first clarify the purpose and importance of the overhaul. The regular maintenance of the fresh air system can not only find and solve potential operating problems, improve the operating efficiency of the system, but also effectively extend the service life of the equipment and ensure indoor air quality.

Second, fresh air system maintenance steps
1. Understand the system overview
Before maintenance, first understand the basic situation of the fresh air system, including the structure of the system, operating principle, installation position, etc. This will help pinpoint possible problems more accurately.
2. Get regular checkups
(1) Check the various components of the system regularly, such as filters, fans, pipelines, etc., to see if there is ash accumulation, blockage, damage and other phenomena.
(2) Check whether the power line and control components are intact, whether there is aging, exposure and other phenomena.
(3) Check the operating status of the system, such as air volume, noise, etc., is normal.
3. Clean and replace the components
(1) Clean up the dusty and blocked parts to ensure their normal operation.
(2) Replace the damaged parts, such as filters, motors, etc.
(3) Repair or replace aging wires and damaged control parts.
4. System debugging and performance testing
(1) Debug the fresh air system after maintenance to ensure the normal operation of the system.
(2) Perform performance tests on the system, such as air volume test, noise test, etc., to confirm whether the system performance is up to standard.
5. Records and archives
(1) Record all data and information in the maintenance process in detail, such as maintenance time, maintenance content, replacement parts, etc.
(2) Organize records into files for subsequent maintenance and management.

Three, maintenance points and precautions

1. Safety inspection: During the maintenance process, pay attention to the safety of electricity and ensure the personal safety of the operator. At the same time, check whether the system runs stably to prevent security accidents caused by equipment failures.
2. Professional operation: Fresh air system maintenance requires a certain amount of professional knowledge and skills, it is recommended to be operated by professionals. During maintenance, follow the operating regulations and safety requirements of the equipment to avoid equipment damage or accidents caused by improper operations.
3. Regular maintenance: The fresh air system needs regular maintenance and maintenance to ensure its long-term stable operation. Regularly check the use of all parts of the system, timely cleaning, replacement and maintenance.
4. Pay attention to details: in the maintenance process, pay attention to details, such as whether the pipe connection is tight, whether the wire joint is firm, etc. These problems may cause the system to operate improperly or fail.
5. Prepare tools and accessories: Before starting the overhaul, prepare the necessary tools and accessories, such as screwdrivers, wrenches, filters, motors, etc. Ensure that the required operation and replacement work can be completed in time during the maintenance process.
To sum up, the late maintenance of the fresh air system is very important. By clarifying the purpose of maintenance, following the maintenance steps and key points and precautions, the normal operation and long-term stability of the fresh air system can be ensured, and the indoor air quality can be strongly guaranteed.