Aaon P90790 Speed Control

The Aaon P90790 Speed Control is a critical OEM Hoffman motor speed controller engineered for precise regulation of alternating current (AC) induction motors within Aaon HVAC systems. Designed for field technicians who demand exact performance, this 230V motor speed control utilizes a phase control method to modulate voltage, ensuring optimal airflow management in combustion air blowers. Built to interface with Permanent Split Capacitor (PSC) or shaded pole motors, the P90790 requires a one-pulse-per-revolution Hall effect tachometer sensor for closed-loop feedback, minimizing mechanical wear while maximizing energy efficiency in high-demand commercial environments.

Installation of this Aaon replacement part is streamlined via 1/4-inch quick-connect tabs and a dedicated 3-pin MTA connector for the tach sensor. The controller features dual-mode operation—high and low speed—triggered by 24 VAC control power inputs, with secondary speed tuning available through integrated dip switch settings. With an operating temperature range of -40°C to +70°C and a 4A current rating, the P90790 speed controller is the standard for maintaining head pressure and combustion efficiency in rigorous rooftop and split-system applications.

Key Benefits:

• Precision Speed Modulation: Optimizes AC induction motor performance through advanced phase control technology.
• Robust Compatibility: Specifically designed for Aaon HVAC equipment utilizing 230V PSC or shaded pole motors.
• Enhanced System Longevity: Reduces startup stress and mechanical fatigue with a 15-second full-speed ramp-up.
• Diagnostic Integration: Seamlessly connects to Hall effect sensors for real-time RPM monitoring and control.
• Industrial Grade Reliability: Rated for extreme temperatures, ensuring stability in both heating and cooling cycles.

Common Questions:

Is the P90790 compatible with all Aaon blower motors?
This controller is designed for 230V systems using PSC or shaded pole motors. Always verify your motor is equipped with a compatible Hall effect tachometer sensor before installation.

How do I adjust the high and low speed settings?
The baseline speeds are managed by 24 VAC inputs, while fine-tuning for your specific application is handled via the onboard dip switch configurations.

Can this unit replace a 480V controller?
No, the P90790 is a 230V specific component. For 480V applications, a different Aaon MPN must be utilized to match the power supply requirements.

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.

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