Aaon P72120 Heater

The Aaon P72120 Crankcase Heater is a mission-critical OEM replacement part designed for high-performance HVAC compressor protection. Operating at 480 Volts and delivering 70 Watts of consistent thermal energy, this belt type heater is specifically engineered to fit compressors with a 7" diameter. By maintaining optimal lubricant temperature, it effectively prevents refrigerant migration and liquid slugging during the off-cycle, which are primary causes of premature compressor failure in industrial and commercial units. The 22" leads provide sufficient length for secure wiring into the control circuit, ensuring the heater activates when the compressor is idle. Utilizing a genuine Aaon part ensures the exact impedance and fitment required to maintain system design specifications, protecting your equipment from the risks of cold starts and oil dilution in demanding environments.

• Prevents Liquid Slugging: Maintains oil temperature above the refrigerant saturation point to keep the crankcase clear of liquid.
• Direct OEM Fit: Guaranteed compatibility with Aaon HVAC systems requiring a 480V, 70W wrap-around heater.
• Reliable Cold Weather Starts: Reduces mechanical stress on internal components by ensuring proper lubrication viscosity in low-ambient conditions.
• Heavy-Duty Construction: The belt-style design ensures uniform heat distribution around the compressor housing for maximum efficiency.

What happens if a crankcase heater fails?
A failed heater allows refrigerant to mix with the oil, leading to "foaming" upon startup. This ruins the oil’s lubricity and can cause immediate compressor damage or tripped breakers.

Is this heater compatible with 230V systems?
No, this is a 480V HVAC component. Connecting it to a lower voltage will result in insufficient heat output, while connecting a lower voltage heater to 480V will cause immediate burnout. Always verify your unit nameplate.

How do I confirm the 7" diameter fitment?
This heater is designed for standard oversized scroll or reciprocating compressors commonly found in Aaon rooftop units. Measure the circumference of your compressor shell; a 7" diameter corresponds to approximately a 22" circumference.

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.