FFU (Fan Filter Unit) is an essential air purification equipment for clean rooms, laboratories, electronic production lines, and other places that require high air cleanliness. Correctly installing FFU not only ensures its efficient operation, but also extends its service life.
I. Preparation before installation
Check the integrity of the equipment
Confirm that the outer packaging of the FFU is undamaged and that all accessories (such as screws, sealing strips, power cords, etc.) are complete.
Check if the FFU specifications (size, air volume, filtration level) meet the requirements.
Confirm installation environment
The installation area should be flat, dust-free, and avoid vibration or strong electromagnetic interference.
Check the load-bearing capacity of the ceiling or bracket (generally FFU weight is 15-30kg).
prepare tools
Electric drill, screwdriver, level gauge, sealant (optional).
II. Installation steps
1. Fixed installation bracket (suitable for ceiling mounted FFU)
Mark the installation holes on the ceiling or steel frame according to the FFU size.
Use expansion bolts or suspension rods to secure the bracket and ensure it is level (calibrated with a spirit level).
2. Install FFU body
Place the FFU steadily on the bracket and align the screw holes.
Tighten with screws to ensure no looseness (avoid deformation caused by excessive tightening).
3. Connect the power supply and control system
Connect the wires according to the instructions (usually 220V/380V power supply).
If multiple FFUs are linked, they need to be connected to a speed controller or PLC system.
4. Install HEPA/ULPA filters
Open the filter packaging and check for any damage.
Gently push the filter into the FFU frame, ensuring that the sealing strips around it fit snugly (add sealant if necessary).
5. Run tests
After powering on, observe whether the FFU runs smoothly and whether there is any abnormal noise.
Use an anemometer to detect wind uniformity (standard value: 0.3~0.6m/s).
Use a particle counter to verify cleanliness (as required by ISO Class 5 standards).
III. Precautions
safety first：Power off operation to avoid the risk of electric shock.
Heavy duty FFU requires two people to cooperate in installation to prevent falling.
Sealing key：The filter and frame must be tightly sealed, otherwise air leakage will affect cleanliness.
Regular maintenance：Check the tightening of screws every month.
The filter should be replaced every 1-2 years (depending on the usage environment).
IV. FAQ
Q: What should I do if the wind speed is uneven after FFU installation?
A： Check if the filter is installed smoothly or adjust the fan speed.
Q： How to synchronize and control multiple FFUs?
A： Unified speed regulation can be achieved through a central control system or group control module.
Q: Possible reasons for excessive FFU noise?
A： Wear of fan bearings, loose screws, or turbulent airflow need to be investigated one by one.
