Johnson Controls VFD68BGG-2 Drive

The Johnson Controls VFD68BGG-2 is a robust 208/230V 3-phase 2HP variable frequency drive engineered specifically for technical HVACR applications. Designed for high-performance fan and pump control, this unit is the factory-authorized direct replacement for VFD66CAA-1, VFD66CAA-2, VFD66CAA-2C, and VFD66CAE-1. As a veteran-grade three-phase motor speed controller, it utilizes advanced PWM carrier frequency adjustment (0.7 to 15 kHz) to minimize audible motor noise and mechanical resonance within your condenser fan speed control systems.

This HVAC VFD features dual analog inputs, allowing for the simultaneous monitoring of two refrigeration circuits to ensure the highest demand drive response. The unit is housed in a NEMA 1 fan-cooled enclosure and is compatible with PENN P499 electronic pressure transducers for seamless head pressure control. Whether you are performing a VFD68BGG-2 replacement or a new installation, this drive provides 150% overload capacity for 60 seconds, ensuring reliability during heavy startup loads in commercial refrigeration and VAV environments.

Key Benefits

• Broad Compatibility: Serving as the primary VFD66 series replacement, it fits existing Johnson Controls HVAC footprints with minimal rewiring.
• Multi-Input Logic: Capable of selecting the higher signal from two separate sensors to manage dual-circuit condensing units from a single drive.
• Compact Footprint: The NEMA 1 enclosure is designed for flexible mounting in tight mechanical rooms or integrated control panels.
• Advanced Parameter Tuning: Features a PU/EXT mode for precise field adjustments of motor frequency and start/stop logic via STF/SD terminals.
• System Protection: Integrated protection functions safeguard against overcurrent and voltage fluctuations common in 3-phase HVACR environments.

Common Questions

What motors are compatible with the VFD68BGG-2?
This drive is designed for three-phase AC induction motors. While it works with NEMA Design B motors, inverter-rated motors are highly recommended to handle the high-frequency switching and prevent long-term insulation breakdown.

Can I use this drive for single-phase input applications?
The VFD68BGG-2 is rated for 230V 3-phase input. If only single-phase power is available, the drive must be derated significantly or replaced with a model specifically designed for phase conversion. Consult the technical bulletin for specific derating factors.

How do I resolve an "OL" error on the display?
An "OL" code typically indicates a motor overload. Technicians should verify that the motor's Full Load Amps (FLA) do not exceed the drive's continuous output rating and check for mechanical binding in the fan or pump assembly.

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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.