The Danfoss 131B6945 HVAC Drive is a powerful variable frequency drive engineered specifically for large-scale heating, ventilation, and air conditioning applications, delivering 200 kW (300 HP) of precision motor control capability. Part of Danfoss' acclaimed VLT HVAC Drive FC-102 series, this unit combines advanced power electronics with application-specific control software optimized for the unique demands of climate control systems in commercial buildings, industrial facilities, and marine environments. With its wide input voltage range of 3x380-480V and impressive 0-800 Hz output frequency range, this drive offers exceptional versatility for both standard and specialized HVAC motor applications.

What distinguishes this particular Danfoss 131B6945 variant is its comprehensive component configuration, featuring factory-installed modules including the 130B6038 DT/07, 130B6016 CT/7, AT/7, and DT/7 control and interface boards, along with the 130B6857 accessory module bearing serial 975971G029. This fully equipped configuration, specified under order number 176F8626, provides enhanced connectivity and control functionality that simplifies integration into complex building automation architectures. The included Hammond Power Solutions single-phase transformer (Cat.No. 157998, 400VA) ensures reliable isolated power for control circuits.

At Auto2mation, we specialize in procuring and supplying premium industrial automation equipment from the world's leading manufacturers. Every Danfoss VLT drive in our inventory undergoes thorough quality verification to ensure it meets the exacting requirements of climate control professionals. We back every unit with our comprehensive 30-day warranty and complimentary worldwide shipping, providing the confidence you need when sourcing critical HVAC control equipment.

Key Features & Specifications

The Danfoss 131B6945 VLT HVAC Drive is engineered with a comprehensive suite of features that address the full spectrum of climate control application requirements. The FC-102 series is distinguished by its embedded HVAC application knowledge, which manifests in pre-configured macros for variable air volume systems, constant pressure pumping, cooling tower control, and chiller optimization. This application-specific intelligence dramatically reduces commissioning complexity while ensuring that control algorithms are precisely matched to the physical characteristics of HVAC equipment.

• Part Number: 131B6945 (Danfoss OEM)
• Type Code: FC-102P200T4E00H2Xgxxxxsxxxxaxbxcxxxxdx
• Power Rating: 200 kW / 300 HP for large HVAC installations
• Input Voltage: 3x380-480V AC, 50/60 Hz
• Input Current: 381A (380V) / 348A (480V)
• Output Voltage: 3x0-Vin variable
• Output Frequency: 0 to 800 Hz
• Output Current: 395A (380V) / 361A (480V)
• Enclosure: Chassis / IP00 for panel mounting
• Ambient Temperature: 45°C standard, 55°C with derating
• Control Boards: 130B6038 DT/07, 130B6016 CT/7, AT/7, DT/7
• Accessory Module: 130B6857, Serial 975971G029
• Order Number: 176F8626
• Transformer: Hammond Power Solutions Cat.No. 157998, 400VA

Technical Specifications

Specification	Details
Manufacturer	Danfoss
Product Series	VLT HVAC Drive FC-102
Part Number	131B6945
Order Number	176F8626
Power Output	200 kW / 300 HP
Input Voltage Range	3x380-480V AC
Input Frequency	50/60 Hz
Input Current (380V)	381A
Input Current (480V)	348A
Output Frequency	0 to 800 Hz
Output Current (380V)	395A
Output Current (480V)	361A
Enclosure Rating	Chassis / IP00
Standard Ambient	45°C / 113°F
Max Ambient (Derated)	55°C / 131°F
Control Board Set	130B6038 DT/07, 130B6016 CT/7, AT/7, DT/7
Accessory Module	130B6857, S/N 975971G029
Control Transformer	HPS Cat.No. 157998, 400VA, 50/60Hz

Applications & Use Cases

The Danfoss 131B6945 VLT HVAC Drive addresses the motor control requirements of the largest and most sophisticated climate control systems found in commercial, industrial, and marine environments. Its 200 kW power rating positions it at the top tier of HVAC drive capability, suitable for the most demanding air handling, pumping, and refrigeration applications where reliability and energy efficiency are critical to operational success.

Large Commercial Air Handling Systems

Major commercial facilities including convention centers, sports arenas, airport terminals, and hospital complexes utilize large air handling units (AHUs) that can move hundreds of thousands of cubic feet of air per minute. The Danfoss 131B6945 provides the motor control capability for these large supply and return air fans, enabling variable air volume control that precisely matches ventilation rates to occupancy schedules, outdoor air conditions, and indoor air quality requirements. The drive's multi-zone control capability coordinates operation across multiple AHUs from a single master drive, maintaining consistent pressure and temperature distribution throughout large buildings.

Central Chilled Water Plant Control

Large commercial and institutional buildings typically rely on central chilled water plants for air conditioning, utilizing multiple large chillers, primary and secondary chilled water pumps, and cooling tower fans. The Danfoss 131B6945 can control the largest pumps in these systems, with the integrated PID controller maintaining constant differential pressure across the distribution loop regardless of demand variations. The drive's cascade control function automatically stages multiple pumps on and off in response to system demand, ensuring that the minimum number of pumps operate at their peak efficiency point while maintaining redundant capacity for reliability.

Marine HVAC & Ventilation

Commercial vessels, offshore drilling platforms, and cruise ships require robust climate control systems capable of operating reliably in the challenging marine environment. The Danfoss 131B6945 drives large ventilation fans, air conditioning compressors, and seawater circulation pumps in marine HVAC systems. The drive's comprehensive protection functions guard against the voltage fluctuations, humidity, and vibration typical of marine electrical installations. The fire mode override function ensures that smoke extraction fans operate at full speed during emergency conditions, regardless of any fault conditions or automatic control signals.

Industrial Process Ventilation

Manufacturing processes in mining, metalworking, chemical processing, and waste treatment generate fumes, dust, and heat that must be removed through powerful exhaust ventilation systems. The Danfoss 131B6945 controls large industrial exhaust fans, scrubber system blowers, and makeup air units that maintain safe working environments. The drive's automatic resonance avoidance function prevents operation at frequencies that could excite structural vibrations in large ductwork and fan housings, protecting expensive mechanical infrastructure from fatigue failure.

Why Choose This Danfoss 131B6945 HVAC Drive

The Danfoss 131B6945 VLT HVAC Drive offers compelling advantages for facility managers, building automation engineers, and marine HVAC professionals seeking to optimize climate control system performance while minimizing energy consumption and operational costs. The FC-102 platform represents the culmination of Danfoss' decades of experience in drive technology applied specifically to the unique requirements of HVAC applications.

Comprehensive Control Board Configuration

This particular Danfoss 131B6945 variant ships with the complete set of factory-installed control and interface boards, including the 130B6038 DT/07 main control board and three 130B6016 variant boards (CT/7, AT/7, DT/7) that provide expanded I/O capability, additional communication options, and advanced control functions. The 130B6857 accessory module further extends functionality with specialized interface capabilities. This comprehensive configuration eliminates the need to source and install separate option modules, reducing both procurement complexity and installation time.

Integrated Control Power Transformer

The included Hammond Power Solutions single-phase control transformer (Cat.No. 157998, 400VA, 50/60Hz, Type 3Ah) provides isolated low-voltage power for the drive's control circuits, ensuring reliable operation even during periods of power system disturbance. This integrated transformer approach simplifies installation by eliminating the need to specify and procure a separate control power source, and ensures that the transformer is properly matched to the drive's control power requirements.

Unmatched HVAC Application Expertise

Danfoss VLT HVAC Drives are developed in close collaboration with leading HVAC equipment manufacturers and building automation specialists, ensuring that control algorithms and protection functions are precisely matched to the real-world requirements of climate control systems. Features such as automatic duct static pressure control, cascade pump management, cooling tower temperature optimization, and condenser pressure control are implemented as standard functions that can be enabled with simple parameter selections rather than complex external programming.

Compatibility & Integration

The Danfoss 131B6945 is designed for seamless integration into both new and existing HVAC system architectures. Its chassis-mount IP00 construction provides the flexibility to install the drive within custom enclosures that match the specific environmental and spatial requirements of each installation.

Building Management System Integration

The FC-102 platform supports all major building automation communication protocols through optional plug-in communication modules. BACnet/IP and BACnet MS/TP modules enable direct integration with building management systems following the ASHRAE BACnet standard, while Modbus TCP and RTU modules support integration with industrial SCADA systems and programmable logic controllers. The drive's embedded web server provides standard HTTP access to all parameters and diagnostic data using any web browser, eliminating the need for specialized configuration software.

Electrical System Requirements

The Danfoss 131B6945 requires a three-phase power supply rated at 380-480V with sufficient capacity to supply the maximum input current of 381A at 380V or 348A at 480V. The electrical installation must include appropriately rated branch circuit protection (circuit breaker or fuses) and disconnect means. The IP00 chassis must be installed within a ventilated enclosure that provides adequate cooling airflow and protection against dust, moisture, and accidental contact. Auto2mation's application engineering team can provide guidance on proper enclosure sizing and ventilation design.

Maintenance & Support

Regular preventive maintenance is essential for ensuring the long-term reliability and energy efficiency of variable frequency drives in HVAC applications. The Danfoss 131B6945 is designed with serviceability in mind, featuring modular construction that simplifies component replacement and comprehensive diagnostic capabilities that enable proactive maintenance scheduling.

Recommended Maintenance Procedures

Quarterly maintenance should include inspection of cooling fans for proper operation and clean air filters, verification that heat sink fins are free from dust accumulation, and checking for abnormal noises or vibrations. Annual maintenance includes torque verification of all power and control terminal connections, inspection of DC link capacitors for any signs of degradation, and functional testing of safety circuits including the fire mode override function. The drive's built-in operating hours counter facilitates condition-based maintenance scheduling.

Auto2mation Warranty & Technical Support

Every Danfoss 131B6945 purchased from Auto2mation is backed by our comprehensive 30-day warranty that covers all functional aspects of the drive. Our technical support engineers are available to assist with drive commissioning, parameter optimization, troubleshooting, and application guidance throughout the warranty period. We provide free worldwide shipping on all orders, ensuring prompt delivery of your critical HVAC control equipment.

Frequently Asked Questions

Q1: What makes this Danfoss 131B6945 variant different from standard models?

This particular Danfoss 131B6945 variant includes the complete factory-installed set of control and interface boards (130B6038 DT/07, 130B6016 CT/7, AT/7, DT/7), the 130B6857 accessory module, and a Hammond Power Solutions 400VA control transformer. This comprehensive configuration, specified under order number 176F8626, provides enhanced functionality and simplifies installation by eliminating the need to source and install separate option modules.

Q2: What is the significance of the 0-800 Hz output frequency range?

The extended 0-800 Hz output frequency range provides exceptional versatility for both standard and specialized HVAC applications. While most HVAC fans and pumps operate at 50 or 60 Hz base frequency, the extended range accommodates high-speed direct-drive fans, specialized turbo compressors, and custom applications requiring higher rotational speeds. The drive's programmable skip frequency function can be used to avoid mechanical resonance frequencies in the connected equipment.

Q3: What motor sizes can this drive control?

The Danfoss 131B6945 is rated for 200 kW (300 HP) output and can control three-phase induction motors up to this power rating. The drive's output current capability of 395A at 380V or 361A at 480V should be matched to the motor's full load current rating, considering the specific duty cycle, ambient temperature, and overload requirements of the application. For variable torque HVAC applications, the drive can typically control motors at the full 200 kW rating. For constant torque applications or elevated ambient temperatures, some derating may be appropriate.

Q4: What enclosure is required for this IP00 drive?

The Danfoss 131B6945 has an IP00 (chassis) rating and must be installed within an external enclosure that provides the appropriate level of environmental protection for the installation location. For clean indoor electrical rooms, an IP31 enclosure is typically sufficient. For dusty industrial environments, IP54 or higher is recommended. For outdoor or washdown applications, IP66 or NEMA 4X enclosures are required. The enclosure must also provide adequate ventilation to dissipate the heat generated by the drive during operation.

Q5: Does this drive include fire mode override capability?

Yes, the Danfoss FC-102 series includes a dedicated fire mode input that, when activated, commands the drive to operate at a pre-configured fire mode speed regardless of any fault conditions, control signals, or automatic functions. This fire override capability is essential for smoke extraction fans and pressurization fans in commercial buildings and marine vessels, and is required by building codes in most jurisdictions.

Q6: What warranty coverage does Auto2mation provide?

Auto2mation provides a comprehensive 30-day warranty on every used Danfoss 131B6945 drive, covering all functional aspects of the unit including the power section, control boards, and interface modules. Free worldwide shipping is included with every purchase, and our technical support team is available to assist with commissioning, parameter configuration, and troubleshooting throughout the warranty period.

Related Products

Discover these related industrial drives and automation components from Auto2mation:

• Danfoss 131B6945 VLT HVAC Drive - The standard configuration of this 200 kW/300 HP Danfoss FC-102 series drive with LCP 102 control panel for large-scale climate control applications.
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• Hyundai HIAN 20 Air Circuit Breaker - Heavy-duty air circuit breaker for comprehensive overcurrent and short-circuit protection in motor control centers.
• Schneider Electric ATS48C59Q Soft Starter - Advanced motor soft starter for smooth, controlled acceleration of large HVAC motors.
• Terasaki AT20 Circuit Breaker - Marine-grade circuit breaker for reliable overcurrent protection in shipboard electrical distribution systems.