Carrier 32LT660005 Drive

The Carrier 32LT660005 Motor Master1 Drive 460V is a critical solid-state head pressure control engineered to maintain performance in demanding outdoor conditions. This 460V variable frequency drive modulates condenser fan motor speed based on saturated condensing temperature, allowing for reliable cooling operation in ambient temperatures as low as -20°F. By transitioning from standard on/off cycling to precise voltage and frequency modulation, this MotorMaster head pressure control stabilizes head pressure at 100 +/-10°F, protecting the compressor from low-pressure trips and oil migration issues common in low-ambient environments.

Designed for seamless integration into Carrier commercial HVAC systems, the Carrier 32LT660005 features a robust internal construction capable of handling 4.0 amps at 50/60 Hz. This OEM Carrier motor drive is a direct replacement for legacy part numbers such as 32LT660003 and 309273-403, ensuring terminal-to-terminal compatibility. The package includes the necessary sensors and mounting hardware, facilitating a streamlined installation for technicians servicing rooftop units or chillers requiring precise HVAC condenser fan speed control.

• Low-Ambient Reliability: Enables system operation down to -20°F by maintaining optimal condensing temperatures.
• Solid-State Precision: Utilizes advanced VFD technology to modulate motor speed rather than simple cycling, reducing mechanical wear.
• OEM Compatibility: Specifically calibrated for Carrier and Bryant equipment, ensuring the 460V head pressure control matches factory specifications.
• Enhanced Efficiency: Optimizes power consumption by running fan motors only at the speed required by current thermal loads.

Can this drive be used with any 460V motor?
This drive is specifically designed for single-phase condenser fan motors compatible with MotorMaster control logic. Always verify motor insulation class and phase requirements before installation.

Where should the temperature sensor be mounted?
For accurate feedback, the sensor assembly must be mounted on the return bend of the condenser coil according to the included 32LT-6SI service instructions.

Does this unit require wind baffles?
Yes, for low-ambient operation down to -20°F, field-installed wind baffles are required to prevent wind-induced pressure fluctuations that can override the 32LT660005 control logic.

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.