LWCD-60870MN-06 24V DC Cross Flow Fan for Air Curtains

Customer Requirement

LONGWELL’s long-standing Russian OEM partner promoted a new generation of building management systems (BMS), which requires closed-loop verification of fan efficiency. They need to upgrade the existing Longwell LWCD-60870MN-06 cross flow fan with electronic control and keep its current mechanical structure or aerodynamic performance.

Their original units used a standard 3-wire brushless DC motor. The updated requirement specified the addition of a fourth wire for an FG signal, providing tacho feedback for speed monitoring. GB/T13933-2008 safety standards should be reached, which is the baseline of the target market.

Engineering Solution

LONGWELL provided an integrated solution instead of adding an external speed sensor. This avoids increasing material costs, installation complexity, and potential mechanical failure points. LONGWELL’s team evaluated modifying the existing motor’s internal controller PCB. The existing motor uses Hall effect sensors for commutation. The task was to buffer the signal from one of these sensors and expose it as a clean, open-collector FG output.

The final solution selected a variant of Longwell’s SmartEC™ controller board that already had the FG output functionality. A new 4-core cable harness with a 500 mm length was specified (Red: +24V, Black: GND, White: 0-10V, Yellow: FG).

Technical Specifications

Parameter	Value
Model	LWCD-60870MN-06
Voltage (VDC)	24
Current (A)	1.25
Speed (RPM)	1800
Air Volume (m³/h)	693
Air Volume (CFM)	~407
Speed Control	0-10V / FG Signal Output
Bearing Type	Ball Bearing
Overall Length (mm)	930 ± 2
Impeller Length (mm)	870 ± 1
Impeller Diameter (mm)	60
Impeller Material	Aluminum (Al)

The specifications detail a high-airflow, low-profile cross-flow fan designed for 24 VDC systems. Its 693 m³/h output within a 930 mm frame is ideal for creating a wide, uniform air curtain for applications in commercial HVAC and specialized heating equipment.

Technical Drawing

The following document is the 4-wire designed LWCD-60870MN-06 cross flow fan.

LWCD-60870MN-06 Final Drawing (4-Wire)

Why LONGWELL for Air Curtains?

• Simplified Integration: LONGWELL cross flow fans are easy to install, supporting horizontal and vertical mounting. The 0-10V or PWM speed control system can be added to the motor.
• High performance: LONGWELL’s LWCD-60 series cross flow fan can operate at temperatures ranging from -25°C to +60°C. Additionally, our products achieve industry-leading low-noise performance with a noise level as low as 38 dBA.
• Efficient airflow: The LWCD-60870MN-06 cross-flow fans produce a broad and uniform airflow of 693 m³/h. It enables the generated air curtain to effectively block the exchange of temperatures between the inside and outside of the room.
• Targeted Tailored: LONGWELL offers professional technical support and fast after-sales service. We also provide customization services for OEM/ODM to meet the specific needs.

Explore our full Cross-Flow Fans range.

Frequently Asked Questions

Q: Can the LWCD-60870MN-06 be ordered in different lengths or with different performance?

A: Yes. LWCD-60870MN-06 model is part of a standard product. We can produce customized lengths and impellers of this model. For tailored needs, we offer a 90-day custom NPI process.

Q: What is the FG signal output for the LWCD-60870MN-06?

A: The FG signal is an open-collector signal, providing a square-wave pulse output generated by the motor’s internal Hall sensors.

Q: Can this fan be used in markets outside of Russia, such as North America?

A: This LWCD-60870MN-06 cross flow fan is CE-marked by default. For the North American market, we offer equivalent models that are certified to UL 507 and UL 1004-1 standards.

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Project Item: 7026706720-LWCD-60870MN-06
Project Date: 2026-06-24 07:24:28