Centrifugal Utility Set – CUS

Wheel Technology

1. Highlights of the 4 Generation of Wind-Surfer wheel

• Excellent sound and air performance
• Wide performance range of high efficiency and non-overload
• The balance quality grade as high as G2.5

1. Air Performance Design

• Optimized design through CFD flow field simulation and repeated tests
• Wheel cone and inlet cone in conformity with flow field characteristics
• Flow passages control: airflow regulated well through precise synergy
• Optimized mounting angle for blades

1. Structural Design

• Stress analysis by FEA method for better performance
• Various additional strengthening for different specifications for greater reliability
• Riveting technology used to avoid stress

1. Wheel Improved 

• Continuous Improvement: upgraded to the 4th generation of wheel
• Compared with the 3rd generation: overall performance improved by 5-10 %
• Compared with the 3rd generation: overall sound level reduced by 2-3 dB(A)

1. Advanced Process

• Wheel cone and inlet cone formed by spinning to ensure good air performance
• Inlet Cone: replacing the inlet bell to ensure smooth airflow
• Blades: formed by punching to ensure quality
• Tooling: dedicated fixtures to ensure the precise mounting position of blades

 General Features

1. Wide Performance Range

• Wheel Diameter: 300~ 1,000 mm
• Wide RPM and performance ranges offering more choices in model selection
• The number of turns adjustable, pulley and motor replaceable: performance range regulated for better adaptability

1. Scroll Turned for Variable Discharge Directions at Jobsite

The scroll is fixed by 8 equally spaced bolts. Discharge directions can be adjusted at the jobsite within the allowable angle range.

1. Continuously Welded Housing 

• The continuously welded housing has sufficient structural rigidity
• It is more suitable for ventilation of moist air compared with scroll manufactured with lock seam
• The accumulated dropping liquid inside the scroll will not result in leakage
• It is suitable for exhausting air containing condensed water and kitchen fumes

1. Easy Maintenance

• Access doors are available on both sides of the motor
• With one screw driver, the electrical components can be checked and repaired
• Scroll access door is provided as a standard accessory

1. Suitable for outdoor installation

• Rain cover available to protect the whole drive unit
• Total protection from sunlight, rain and snow affecting rotating parts
• Fewer impacts from climate factors on the durability and safety of fans

1. Compact Structure  

• Belt drive: AMCA arrangement 10 (motor right under shaft); direct drive: AMCA arrangement 4
• The compact structural design reducing space
• Belt length reduced and belt life extended
• Low center height of scroll leaving more space for duct installation

Technical Information

1. Quality Standards

The fan shall be tested and certified in accordance with AMCA Standard 210 & 300,UL 705. AMCA Seal for (Efficiency Sound, Air Performance and Fan energy index) shall be tagged on each fan before leaving the factory as a standard seal, for other seals shall be tagged on the fan according to application and customer needs.

The manufacturer shall obtain Production License for National Industrial Products and be certified by ISO 9001, ISO 14001, ISO 45001.

1. Fan Type

The fan shall be direct or belt drive type, with an aluminum backward inclined centrifugal wheel. The inlet cone shall

have a curved section to ensure smooth air movement. Each wheel shall be statically and dynamically balanced up to

grade G 2.5 as per ISO 1940.

1. Housing Material

The fan housing shall be constructed of steel. It shall be thick and strong enough to support the drive mechanism and motor. The scroll shall be continuously welded. The fan surface shall go through the processes of alkaline wash and Parkerizing and be finished with electrostatic epoxy coatings in black or other colors specified by customers.

Both the wheel and inlet shall be constructed of aluminum. Access door: An access door must be provided for the scroll to remove possible foreign bodies inside of the fan. The platform on which the fan is placed shall be a stable and level one and vibration isolators shall be used for connection. The pre-embedded fixing method shall not be required.

1. Protections

Standard belt drive CUS fans that include a shaft/bearing guard and belt guard are for indoor installation.

For outdoor installation, there shall be a rain cover that offers total protection for the motor and other driving parts.

1. Fan Parts and Drive Mechanism (For belt drive type only)

5. Fan Parts and Drive Mechanism (For belt drive type only)