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\nI. Execution Standards and Basic Requirements
\n1. Core Specifications
\nGB51110-2015 “Construction and Quality Acceptance Specifications for Clean Rooms” (mandatory)
\nIEST-RP-CC001 (Filter Testing), IEST-RP-CC002 (FFU Performance)
\n2. Environmental Conditions
\nTemperature: 5\u201345\u2103; Relative Humidity: \u226485% (35\u2103); Air Pressure: 86\u2013106 kPa
\nInstallation Area Sealed, Dust-Free, Fresh Air Pre-Purification \u2265 72 hours, Dust Concentration \u2264 3500 particles\/L (\u22650.5 \u03bcm)
\nFloor and Ceiling Load Compliance with Design, Horizontal Deviation of Frame \u2264 2 mm\/m
\n3. Personnel and Materials
\nPersonnel: Clean Clothing, Gloves, Dust-Free Shoes, Hair Cover, Prohibition of Bare Hand Contact with Filter
\nEquipment: FFU Appearance without Deformation \/ Rust \/ Peeling, HEPA\/ULPA without Damage, Sealing Gasket in Good Condition
\nTools: Dust-Free Cloth, Isopropyl Alcohol, Level, Torque Wrench, Insulated Electrical Tools
\nII. Installation Process (Including Key Control Points)
\n1. Construction Preparation
\nReview of Drawings: Clearly define FFU layout, quantity, size, air volume (conventional 0.45 m\/s \u00b1 20%), speed control method, electrical wiring
\nSite Cleaning: Use dust-free cloth + isopropyl alcohol to wipe the ceiling, frame, and enclosure structure, remove dust and oil stains
\nEquipment Unboxing: Verify model and specification, check the box, fan, filter, sealing parts, power cord, control interface;Keel installation: The spacing of the suspension rods **\u2264 1.2m **, the main\/secondary keels are leveled (checked with a level), the joints are misaligned and connected, and the cross-shaped reinforcing plates are used for reinforcement.
\nFrame Installation\uff1a Suspension Rod Spacing \u2264 1.2 m\uff0c Main \/ Secondary Frame Leveling (rechecked with level)\uff0c misaligned joints connected\uff0c cross reinforcement plates for reinforcement\uff1b Edge Frame Sealing Gasket Continuous without Breaks
\n2. FFU Installation and Positioning
\nTransportation\uff1a Two-person inclined lifting\uff0c prohibited upside-down \/ heavy pressure\uff0c protect the outlet and filter
\nPositioning\uff1a Arrange from the center of the clean area to the periphery\uff0c FFU Edge Frame aligned with the frame\uff0c air outlet facing down
\nSealing\uff1a Full adhesion of closed-cell sponge gaskets between the box and the frame\uff0c uniform pressure\uff0c gap \u2264 0.5 mm\uff1b When sealing the liquid tank\uff0c there should be no bubbles and continuous fullness inside the tank
\nFixation\uff1a Uniform tightening of stainless steel bolts diagonally\uff0c torque 8\u201310 N\u00b7m\uff0c anti-loosening and deformation prevention
\n3. Filter Installation (Core Anti-Pollution)
\nCheck\uff1a HEPA\/ULPA Filter Paper without Damage\uff0c Sealing Gasket without Detachment\uff0c Only hold the Edge Frame\uff0c Prohibition of Contacting the Filter Paper
\nPositioning\uff1a Tilted insertion into the frame\uff0c air outlet facing down\uff0c aligned with the FFU Box
\nSealing\uff1a Uniform compression of the filter frame with the frame \/ box\uff0c no warping \/ gaps\uff1b Resistance Deviation \u2264 5% (same group of filters)
\nProtection\uff1a Immediately cover with dust-proof film after installation\uff0c until system debugging
\n4. Electrical Wiring (Safety First)
\nPower Supply\uff1a AC 220 V\/50 Hz\uff0c Independent Circuit + Leakage Protection (\u226510 mA)\uff0c Ground Resistance \u2264 4 \u03a9
\nWiring\uff1a Clear distinction of positive and negative poles of EC motor and ground wire\uff0c insulated packaging of connectors\uff0c single-ended grounding of shielding layer\uff1b Prohibition of live work
\nControl\uff1a Single Control \/ Bus Control Network Connection\uff0c Unique Address Coding\uff0c Speed Signal (0\u201310 V\/4\u201320 mA) Error-free
\nInsulation\uff1a Use 500 V Megohmmeter to measure insulation to ground \u2265 1 M\u03a9 after wiring
\n5. Post-Installation Inspection and Leak Detection
\nAppearance: The FFUs are neatly arranged and level, with no visible gaps in the seals and no loose bolts
\nElectrical\uff1a Correct Wiring\uff0c Reliable Grounding\uff0c Insulation Compliance Leak Detection (Must be Tested):
\nAerosol: PAO\/DOP, concentration 10\u201320 \u03bcg\/L
\nScanning: 2\u20133 cm away from the filter surface, speed **\u2264 5 cm\/s**, focus on the frame \/ adhesive strip
\nPass: Leakage rate **\u2264 0.01%** (ISO 5 grade), otherwise re-seal or replace the filter
\nIII. Operating Procedures (Power On \u2192 Operation \u2192 Power Off \u2192 Emergency)
\n1. Pre-power On Inspection (Static)
\nEnvironment: Clean door closed, enclosure without damage, pressure difference **\u2265 5 Pa** (relative to non-clean area)
\nFFU: Appearance intact, no leakage, filter in place, dust cover removed
\nElectrical: Power normal, grounding reliable, control panel indicator lights normal
\nInspection Form: Record item by item, eliminate abnormalities first before powering on
\n2. Power On and Debugging
\nSequence: First turn on the main power \u2192 sequentially start FFU \u2192 adjust wind speed to the set value (0.36\u20130.54 m\/s) \u2192 stabilize for 15 minutes
\nWind Speed: Measure 5 points (corners + center) of the outlet using a hot wind speed meter, deviation **\u2264 \u00b110%**
\nAir Flow: Smoke test to confirm vertical laminar flow, no vortex \/ dead angle, uniform airflow in the working area
\nCleanliness: Particle counter measures 0.5 \u03bcm\/5 \u03bcm concentration, meets standards (e.g. ISO 5 grade: \u2264 352 particles\/m\u00b3@0.5 \u03bcm)
\nNoise: 1.2 m from the ground, 1 m from the FFU, **\u2264 65 dB(A)**
\n3. Normal Operation Monitoring
\nFrequency: Check once every 2 hours, record wind speed, noise, pressure difference, particle concentration, equipment status
\nParameters: Wind speed 0.45 m\/s \u00b1 20%; Indoor positive pressure 5\u201310 Pa; Temperature 22\u201326\u2103; Humidity 40%\u201360%RH
\nAbnormalities: Wind speed drops \/ noise increases \u2192 check if filter is clogged \/ fan failure; Excessive particles \u2192 Check for seal leakage\/filter damage
\n4. Power Off Procedure
\nSequence\uff1a Sequentially turn off FFU \u2192 turn off control power \u2192 turn off main power
\nDuration\uff1a Long-term shutdown \u2192 run for 30 minutes before shutting down\uff0c self-purification before shutting down\uff0c prevent dust accumulation
\nProtection\uff1a Cover dust cover after shutdown\uff0c close clean door\uff0c maintain positive pressure protection
\n5. Emergency Operations
\nPower Outage\uff1a Immediately turn off all switches\uff0c restart according to the power-on procedure after power comes back\uff0c stabilize for 30 minutes before resuming production
\nLeakage \/ Filter Breakage\uff1a Immediately stop operation\uff0c isolate contaminated area\uff0c replace filter and re-check for leaks
\nFan Failure\uff1a Stop operation\uff0c cut power\uff0c check wiring \/ motor\uff0c repair and test for 1 hour without abnormalities before using
\nIV. Maintenance and Common Issues
\n1. Daily Maintenance (Weekly)
\nDust-free cloth + isopropyl alcohol wipe FFU exterior surface\uff0c outlet\uff0c control panel
\nCheck for aging \/ loosening of sealing rubber strips\uff0c bolts\uff0c power lines
\nRecord operating parameters\uff0c trend analysis
\n2. Regular Maintenance (Monthly \/ Quarterly \/ Annually)
\nMonthly\uff1a Measure wind speed\uff0c noise\uff0c particle concentration\uff0c calibrate instruments
\nQuarterly\uff1a Clean \/ replace primary filter (FFU inlet side) when pressure difference \u2265 150 Pa
\nAnnually\uff1a Leak detection for HEPA\/ULPA\uff0c fan bearing lubrication\uff0c motor insulation test\uff1b lifespan approximately 1.5\u20132 years (depending on environment)
\n3. Common Issues and Solutions
\nInsufficient Wind Speed\uff1a Filter clogged \u2192 replace\uff1b Fan speed low \u2192 adjust voltage \/ frequency converter\uff1b Seal leakage \u2192 re-seal
\nSeal leakage \u2192 Reseal
\nExcessive particles: Filter damage \u2192 Replace; Border leakage \u2192 Reseal; Airflow vortex \u2192 Adjust FFU layout\/wind speed
\nHigh Noise\uff1a Fan imbalance \u2192 adjust\uff1b Bearing wear \u2192 replace\uff1b Loose fixation \u2192 tighten
\nV. Key Prohibitions
\nDo not touch HEPA\/ULPA filter paper with bare hands\uff0c no oil stains \/ water stains Do not invert \/ overload \/ strike the FFU. Place the filter vertically.
\nDo not connect wires while powered on \/ perform maintenance by opening the cover. Test for electricity after power is cut off.
\nDo not put into operation without leakage detection. Vi. Acceptance Criteria (GB51110-2015)
\nDo not operate in environments with excessive temperature \/ humidity \/ dust.
\nSix. Acceptance Criteria (GB51110-2015)
\nInstallation: Correct position, neat arrangement, meets horizontal standards, tight sealing, reliable fixation.
\nPerformance: Wind speed 0.45 m\/s \u00b1 20%\uff1b meets cleanliness standards\uff1b noise \u2264 65 dB (A)\uff1b air leakage rate \u2264 1.0% (ISO 6\u20139 grade)
\nThe documents include complete completion drawings, equipment qualification certificates, test reports and maintenance manuals<\/p>","protected":false},"excerpt":{"rendered":"