The Johnson Controls VFD68BFD-2 is a robust variable frequency drive designed for precise HVAC fan speed control in single-phase input residential and light commercial applications. This 230 Vac, 1 HP (0.75 kW) unit features a NEMA 1 fan-cooled enclosure, ensuring reliable performance by maintaining optimal internal temperatures during high-torque operations. Engineered as a direct replacement for VFD66AAA-1 and VFD66AAA-2 models, the VFD68BFD-2 allows for seamless field retrofits without complex reconfiguration of existing mounting hardware. It utilizes advanced pulse width modulation (PWM) technology to vary motor speed based on 0-10 VDC or 4-20 mA control signals, significantly improving system efficiency and reducing mechanical stress on the compressor and fan motor. For technicians, the VFD68BFD-2 frequency drive provides a straightforward interface for setting minimum and maximum frequency limits, ensuring the system operates within safe parameters while maximizing energy savings and maintaining precise pressure or temperature setpoints. Key Benefits for the Contractor: Direct Drop-in Replacement: Simplifies service calls by replacing obsolete VFD66AAA-1 and VFD66AAA-2 units with identical footprints and wiring logic. Enhanced Thermal Management: The integrated fan cooling within the NEMA 1 enclosure prevents overheating in high-duty cycle applications. Versatile Input Compatibility: Accepts standard industry analog signals, making it compatible with most building automation systems (BAS) and standalone controllers. Improved System Longevity: Soft-start capabilities reduce inrush current, protecting the motor windings and extending the lifecycle of the HVACR system components. Common Questions: Can the VFD68BFD-2 be used with 460V motors?No, this specific model is rated for 230 Vac input and output. For 460V applications, a different series unit must be specified to match the motor plaque voltage. Is this drive suitable for outdoor mounting?The VFD68BFD-2 features a NEMA 1 rating, which is intended for indoor use protection against dust. If installing outdoors, it must be housed within a secondary weather-proof enclosure. How do I calibrate the speed range for my specific fan?The drive includes onboard potentiometers or digital parameters to set the low-end and high-end hertz, allowing you to match the VFD performance to the specific CFM requirements of the air handler or condenser fan. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
