200 Pa Is a Lot to Ask of an Axial Fan

What the OEM specified

An OEM asked for 100 units of a 630mm EC axial fan at 14,400 m3/h and 200 Pa, on a 460V three-phase supply. Axial fan pressure margin decided the selection.

The voltage tells you the market. 460V three-phase is North American industrial power. Consequently this equipment is bound for the United States or Canada.

Here the duty point tells you the application. High airflow against 200 Pa is demanding for an axial fan, so axial fan pressure margin becomes the question. It points at an air-cooled condenser, a chiller, or dense data center cooling, where air is forced through restrictive coils and filters.

• 380 to 480 VAC three-phase, since 460V sits inside that window.
• A 630mm blade diameter, since the customer asked for it by name.
• An EC motor, rather than AC paired with a VFD.
• Full specifications and a formal quotation, ready for evaluation.
• Lastly, performance data verifiable against AMCA 210/211.

No noise limit and no detailed dimensions came with the brief. Even so, size always constrains an OEM integration. Consequently we assumed standard panel or shroud mounting, with a compact axial depth and a square frame.

Choosing the EC axial fan

The duty point did most of the selecting. A smaller fan cannot make 200 Pa without spinning hard enough to cost noise and power. Meanwhile a larger one would not fit the envelope, and it would be uneconomic for the airflow required.

Why a drive would cost you axial fan pressure margin

We considered a legacy AC motor with a variable frequency drive, then dismissed it. Adding a VFD means adding cost, footprint and a failure point.

Furthermore, turn-down efficiency is worse. An AC motor throttled by a drive loses more at part load than an integrated EC axial fan does, and part load is where a condenser spends its year.

Where the axial fan pressure margin sits

So we proposed the LWAE3G630TS-5PKW-21-00. Its curve, validated against ISO 5801 methods, shows 14,418 m3/h at 271 Pa.

That figure is worth reading carefully. The customer asked for their airflow at 200 Pa, and this fan produces it at 271 Pa instead. Consequently there is real margin for a dirty coil, a warm day, or a system that turns out slightly more restrictive than the drawings suggested.

Voltage and control

Meanwhile the built-in SmartEC drive works across 380 to 480V at 50 or 60Hz, so 460V needs no change whatsoever. Meanwhile input power at a near-equivalent duty point is 2894W.

Control inputs, meanwhile, cover 0-10VDC, PWM and RS485 Modbus. In short, that is the plug-and-play integration the customer wanted when they specified EC in the first place.

Suited to outdoor equipment

Finally, an operating range of -25C to +65C and IP54 protection cover what an outdoor condenser meets, from a winter start to a rooftop in August.

Technical Specifications

The voltage range row is the one that matters for North America. It covers 460V without any change to the EC axial fan itself.

Technical Documentation

Here the P-Q performance curve confirms the LWAE3G630TS-5PKW-21-00 achieves the required duty point of 14,400 m³/h at 200 Pa, with ample margin. This document is essential for the system designer to validate fan selection.

The complete technical datasheet provides detailed electrical and mechanical specifications for system design engineers and procurement managers. It contains all data needed for electrical panel design and mechanical mounting.
View Full Technical Datasheet (PDF)

Meanwhile the source specification document is available for integration into customer technical files and quality management systems. This file is typically used by the customer’s documentation control team.
Get Specification Source File (DOCX)

How to check axial fan pressure margin

On a 100-unit OEM order, four things counted.

• A decisive price gap. Landing materially below equivalent European-manufactured fans changes the bill of materials on 100 units, and it did so here without missing a single performance metric.
• Enquiry to approved quotation quickly. The whole process, from first request to final approved drawings and quotation, ran in a compressed timeframe rather than the 12 to 18 month cycles imported European brands commonly quote.
• Curves the customer can rely on. We validate performance to ISO 5801, with engineering practice equivalent to AMCA 210/211. Consequently the OEM budgets for less prototype testing of its own.
• A route to UL. This model ships CE marked. Nevertheless, since we hold UL 507 and UL 1004-1, building a fully UL-compliant variant for North America is a low-risk step rather than a new project.

Browse our EC axial fan range, or the condenser fan series. Test methods are published by AMCA International.

Questions about control and certification

How much pressure margin should I ask for?

Enough to cover coil fouling and filter loading over a service interval, which often means 15 to 25% above your clean-system figure. In practice axial fan pressure margin is what keeps airflow steady as the system dirties. A fan with no axial fan pressure margin delivers less every month after commissioning.

What is the lead time on 100 units?

A standard make-to-order quantity like this runs 15 to 25 days after order confirmation. Where demand is ongoing, we set up a rolling forecast and frame agreement, holding stock or pre-built components so scheduled releases ship in 1 to 5 days.

Can a BACnet BMS control it directly?

Not directly. The SmartEC controller speaks Modbus RTU over RS485, plus 0-10V analogue and PWM. For BACnet/IP or BACnet MS/TP you need a small protocol gateway. We supply the complete Modbus register map so your controls integrator can configure it without guesswork.

Is this model UL certified for the United States?

Not with the -21 suffix, which is configured for CE. We hold UL 507 and UL 1004-1 certification and can build a UL-certified variant instead. Specify that at quotation stage, since it carries a different model suffix and UL-specific labelling needed at import and inspection.

Why does pressure margin matter more than headline airflow?

Because a system never stays as drawn. Filters load, coils foul, and installed ductwork rarely matches the design exactly. An EC axial fan chosen to meet its duty point precisely has nowhere to go when resistance rises. One with margin, by contrast, simply moves further along its curve.