2025-03-15
Critical Safety Notices:
1.Grounding of both fan housing and motor housing must be reliably implemented. Reverse rotation, operation beyond rated current, and phase-loss operation are strictly prohibited.
2.Lubricate bearings at intervals not exceeding 1,000 operating hours. Maintenance during operation is forbidden.
Pre-Installation Preparation:
1.Before unpacking, inspect packaging for integrity and verify nameplate parameters against requirements, ensuring all accessories are complete.
2.Thoroughly examine the fan for transportation damage including deformation, loose fasteners, or impeller scratches.
3.Conduct insulation resistance testing between housing and motor windings using a 500V megohmmeter; readings below 0.5MΩ require motor winding baking at temperatures not exceeding 120°C.
4.Prepare all necessary installation materials, tools, and workspace beforehand.
Maintenance and Storage:
1.Maintain clean operating environments with unobstructed inlets/outlets, regularly removing debris from fans and ducts.
2.Operate only when electrical supply meets specifications: dedicated circuits (no temporary wiring), stable voltage, and adequate capacity.
3.Immediately shut down upon detecting abnormal noises, severe motor overheating, electrified housing, tripped breakers, or failure to start.
4.Perform maintenance only when powered off. Lubricate bearings with ZL-3 lithium-based grease every 1,000 operating hours, filling 2/3 of bearing cavities for both sealed and motor bearings.
5.Never operate without lubrication. Store in dry conditions with weather protection if outdoors, avoiding physical impacts during handling.
Fan Installation Procedure
1.Thoroughly review the fan specification documents to understand critical parameters including model dimensions, impeller rotation direction, and airflow paths. Conduct a comprehensive inspection of all components, verifying impeller clearance, checking for transit-induced damage or deformation to fan blades, confirming accessory completeness, and ensuring all connections are securely fastenedbefore installation.Any compromised parts must be repaired before proceeding.
2.When connecting ductwork to fan inlets/outlets, install independent structural supports—never allow duct weight to transfer onto fan components. During placement, maintain precise horizontal alignment and achieve natural connection between the foundation, fan base, and outlet ducts without forced adjustments.
3.Post-assembly, manually rotate the impeller using a lever to verify free movement without binding or contact obstructions. Before test operation, install user-supplied protective guards on exposed drive components and apply inlet safety screens when ducts aren't connected.
4.Electrical wiring must be executed by certified electricians with verified correct phase sequencing, complete power circuit integrity, and reliably grounded fan/motor housings.
5.Inspect the interior cavity to ensure no tools or foreign objects remain inside the assembled unit.
Commissioning Procedures:
1.While full-voltage starting is permitted (drawing 5-7× rated current), reduced-voltage starting is required for motors exceeding 11kW or when grid capacity is insufficient.
2.Before energizing, verify wiring against diagrams and ensure stable voltage with intact phases.
3.Test runs require at least two personnel: one controlling power, another monitoring operation. Confirm correct rotation direction first, then check for balanced currents within rated limits. After 5 minutes of operation, power down for inspection before restarting.
4.For multi-speed units, always initiate low-speed operation first; switch to high speed only after complete stop.
5.Upon reaching rated speed, measure input current continuously—operation beyond rated current mandates immediate shutdown and voltage verification.
6.Required motor power ratings correspond to fully open inlets for centrifugal fans; operating at maximum inlet opening risks motor damage. During commissioning, initially close inlet/outlet valves, then gradually open them to achieve required parameters while constantly monitoring current against rated values.
