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Purification Air Conditioning System Ventilation System Commissioning Plan (Reduced Version)
2026/6/11
Verify the installation quality and operational stability of the system equipment, calibrate parameters such as air volume and air pressure to achieve air volume balance, ensure that the indicators of cleanliness, temperature, humidity, and pressure difference in the clean room meet the standards, identify and solve problems such as leaks and abnormal sounds, ensure the efficient and stable operation of the system, and provide a qualified clean environment.
II. Debugging Basis
National standards: "Design Code for Cleanrooms" (GB 50073-2013), "Quality Acceptance Specification for Ventilation and Air Conditioning Engineering Construction" (GB 50243-2016), etc.
Project documents: Construction drawings, design specifications, air volume balance charts and other design files; Construction acceptance records, equipment installation records and other construction materials.
Equipment information: Product manuals and performance parameter tables for air conditioning units, fans, etc.
III. Preparations Before Debugging
Technical Preparation: Familiarize with the design documents and specifications, clearly define the debugging scope and technical requirements; Prepare a schedule plan and determine the layout of measurement points; Prepare the debugging record forms.
Personnel preparation: Form a professional team consisting of engineers, technicians, and surveyors, with clear division of responsibilities; conduct pre-job training covering the plan, operation procedures, and safety regulations.
Equipment and instrument preparation: Prepare calibrated wind speed meters, differential pressure gauges, particle counters and other measuring instruments as well as common tools and consumables; Conduct a comprehensive inspection of the system equipment to ensure it is firmly installed, the wiring is correct, and there is no damage.
On-site preparation: Clear the site to ensure unobstructed access; Check the sealing of the ducts, the flexibility of the air valves, and the sealing of the cleanroom enclosure structure; Ensure the normal operation of supporting systems such as power supply and water supply; Set up warning signs.
IV. Debugging Contents and Steps
Single-machine test run of the equipment
Fan trial operation: Check the wiring and grounding; manually rotate the shaft to confirm there is no jamming; after startup, verify the direction of the impeller, monitor parameters such as current, voltage, and noise, and operate continuously for at least 2 hours; if any abnormalities occur, investigate and stop the machine.
Test run of air conditioning unit: Inspect the connections and seals of internal components; Start each functional module in sequence to verify the operating status and the accuracy of the control system; Run continuously for at least 4 hours, record key parameters.
Valve debugging: Check the opening and closing direction and flexibility of each valve one by one, verify the regulating performance, and set the opening degree after the debugging is completed.
2. Air duct system tightness and air volume balance adjustment
Sealing inspection: Focus on checking areas such as flanges and equipment interfaces. Use the light leakage method or air leakage measurement method. Leaking points should be promptly sealed.
Air volume balance: Measure the total supply/return/exhaust air volume. If the deviation exceeds 10%, adjust the fan speed or the damper to correct it.
Calibrate the air volume of each branch pipe and the air outlet, ensuring compliance (deviation ≤ ±10%), and mark the fixed air valve.
3. Pressure differential adjustment of cleanroom
Close the doors and windows, and place a differential pressure gauge at the interface of adjacent areas;
According to the design requirements (positive pressure difference between the clean area and the non-clean area should be ≥ 10 Pa, and the same level areas should be ≥ 5 Pa), adjust the opening degree of the return air/exhaust air valves; confirm that the pressure difference in each area is stable and meets the standards before fixing the air valves.
4. Temperature and humidity adjustment of the clean room
Place temperature and humidity meters at representative positions indoors, and set the target values for the controller (typically 20-26℃, relative humidity 45%-65%).
After operation, monitor the data. Adjust the heaters, humidifiers, cold water valves, etc. to correct the deviations and ensure that the fluctuations meet the requirements.
5. Cleanliness testing
The system has been operating continuously for at least 24 hours, and detection points have been arranged in accordance with the specifications.
After calibrating the particle counter, sampling is conducted and the concentrations of particles ≥ 0.5 μm and ≥ 5 μm are recorded;
Compare the calculated average value with the design limit. If it is not qualified, then rectify and retest.
6. Noise and Vibration Detection
Noise detection: Set up measurement points in the working area to measure the A-weighted sound level (≤ 65 dB(A));
Vibration detection: Measure the effective value of the equipment's vibration speed. If it exceeds the standard, take vibration reduction measures.
V. Common Issues and Handling Measures
Fan abnormal noise and vibration: Clean the impeller and correct the balance, replace the damaged bearings, reinforce the foundation, and adjust the flexible connection of the air duct.
Insufficient air volume: Check for leakage points in the sealed air duct, inspect the opening degree of the air valve, clean or replace the filter, and adjust the fan speed.
Pressure difference instability: Repair the door and window seals, re-adjust the air valves, and stabilize the fresh air volume.
Temperature and humidity not meeting standards: Repair the heat exchange/ humidification/heating components, optimize the controller parameters, and ensure sufficient air volume.
Insufficient cleanliness: Conduct leak detection, replace the filter, clean the accumulated dust in the ducts, and seal the gaps in the enclosure structure.
VI. Test Acceptance and Record Keeping
Acceptance organization: Jointly conducted by construction, design, supervision and construction units. Verify the records and test reports of each debugging project. After passing the inspection, sign the acceptance document; if not qualified, make corrections and re-inspect.
Record Archiving: Compile and organize the debugging plan, equipment trial operation records, air volume/differential pressure/temperature/humidity/air cleanliness test records, problem handling reports, and acceptance documents, and archive them as the completion materials.
VII. Safety Precautions
Strictly follow the operating procedures, and the entrance of the clean room should be treated as required for cleanliness.
Take proper safety measures for high-altitude work.
Check for leakage protection in electrical equipment;
Set up warning signs and, in case of abnormalities, stop the machine and cut off the power for troubleshooting.
When using flammable consumables, ensure proper ventilation and equip with fire-fighting equipment.
VIII. Personnel Responsibility Division
Project Manager: Coordinate organization, coordination management, review of plans, and organization of acceptance.
HVAC Engineer: Technical guidance, problem-solving, data review;
Equipment technician: Equipment debugging and fault troubleshooting;
Surveyor: Parameter measurement and recording;
Operator: Equipment operation and on-site coordination;
Security Administrator: On-site Safety Supervisor.
