Customer Requirement
An OEM needs an axial fan for its new commercial air-cooled condenser units. The axial fan is used for the North American HVAC systems product line. The primary requirement was an axial fan capable of operating reliably on a 380 VAC, 60 Hz three-phase power supply. There are strict dimensional requirements:
- Mounting panel no larger than 415 mm x 415 mm
- Maximum depth is 120mm
- Minimum airflow is 2,500 m³/h (approx. 1470 CFM)
- Noise Level cannot exceed 70 dBA
- Operating temperature range: -30°C to +60°C
- Certification: UL 507, CE,UL
Engineering Solution
The client’s application involved a simple, cost-sensitive on/off control logic. LONGWELL’s technical PM responded with an AC induction motor rather than an EC motor, avoiding the need for an external controller or complex wiring. The diameter of the selected axial fan is 350mm, with a five-blade cold-rolled steel impeller. The LWAA4D350S-5MKB-22-00 model was chosen. This includes an integrated square mounting panel of 410mm x 410mm. It achieves an IP54 protection rating against dust and water spray, making it suitable for direct installation in outdoor condenser units.
Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | LWAA4D350S-5MKB-22-00 |
| Voltage | 380 VAC (Range: 342-418V) |
| Frequency | 60 Hz |
| Speed | 1550 RPM |
| Input Power | 180 W |
| Current | 0.5 A |
| Max Airflow | 2678 m³/h / 1575 CFM |
| Max Static Pressure | ~140 Pa |
| Noise Level (LpA) | 67 dB(A) |
| Operating Temperature | -30°C to +60°C |
| Insulation Class | Class F |
| Protection Class | IP54 |
| Life Expectancy (L10) | 30,000 hours @ 40°C |
| Dimensions (Panel) | 410 x 410 x 130 mm |
| Certifications | CE, RoHS, Reach |
Why LONGWELL for HVAC Condensers？
- Outstanding Energy Efficiency: LONGWELL EC axial fan can deliver over 40% more energy efficiency than traditional AC fans.
- High Protection Rating: As an outdoor HVAC condenser unit, IP55/IP66 protection can be equipped.
- Long Service Life: The maintenance-free deep groove ball bearings offer ≥60,000 hours at 40°C ambient temperature, ensuring 10 years of reliable service life.
- Compliance with Global Standards: Fully complies with EU ErP eco-design directives, meets ASHRAE 90.1 efficiency requirements, and supports LEED, BREEAM, and other green building certifications.
- Trusted Brand: LONGWELL was established in 1990, with more than 35 years of manufacturing experience, and has served 30+ countries.
Explore our full Axial Fans range.
Frequently Asked Questions
Q: What is the lead time for a 500-unit order of the LWAA4D350S-5MKB-22-00?
A: The LWAA4D350S-5MKB-22-00 is a standard make-to-order batch. The typical production lead time is 15-30 days from order confirmation.
Q: Can this AC fan be speed controlled using a VFD?
A: Yes, but it is not recommended. This may increase noise and inefficiency. LWAA4D350S-5MKB-22-00 uses a 3-phase AC motor, which is the client’s requirement. For speed control needs, we strongly recommend an equivalent EC model featuring our SmartEC™ integrated controls for 0-10V/PWM inputs.
Q: What is the expected life and warranty for this fan in an outdoor condenser application?
A: The standard warranty for LONGWELL fans is 24 months from shipment. The LWAA4D350S-5MKB-22-00 has a calculated design life (L10) of 30,000 hours at a 40°C ambient temperature. The wide operating range of -30°C to +60°C, IP54 rating, and Class F insulation make it suited for outdoor condenser duty.
Technical Documentation & Resources
- Download: LONGWELL-LWAA4D350S-5MKB-22-00-Spec-Sheet.pdf
- Download: LONGWELL-LWAA4D350S-5MKB-22-00-Spec-Sheet.docx
Project Gallery & Technical Drawings
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🏆 ISO 9001 / ISO 14001 / ISO 45001 | CE (TÜV) | UL/ETL | ATEX Zone 21/22 | AMCA 210-16 / ISO 5801 tested
Project Item: 7029405819-LWAA4D350S-5MKB-22-00
Project Date: 2026-06-26 06:01:12
