HD52AZ576 Carrier Commercial Condenser Fan Motor

HD52AZ576 Carrier OEM Commercial Condenser 3HP Motor (Thermally Protected)

The Carrier HD52AZ576 is an original equipment manufacturer (OEM) commercial condenser fan motor. Built specifically for high-head-pressure heat rejection applications in heavy commercial split systems, rooftop packaged chillers, and offshore/marine marine-deck climate control units, this motor delivers continuous-duty mechanical output under severe thermal loads.

Rated at 3.0 HP (2.24 kW) on a 575V, 3-Phase, 60 Hz electrical supply, the motor draws 3.8 Amps full-load current (FLA) while sustaining a nominal operating velocity of 1,130 RPM. It is constructed on a standardized NEMA 56 Frame architecture with a totally enclosed air-over (TEAO) / weather-protected enclosure, high-grade deep-groove shielded ball bearings, and internal automatic-reset thermal overload protection to guard against phase asymmetry, rotor lock, and high ambient derating.

Model Details:

• Manufacturer: Carrier Corporation / Carlyle
• Primary MPN: HD52AZ576
• Replacement / Successor Part Number: HD58CH575
• Harmonized Tariff Schedule (HTS) Code: 8501.52.00
• Country of Origin: Vietnam / USA (facility production dependent)
• Shipping Weight: ~60.00 lbs (27.2 kg)

Features

1. Industrial 575V 3-Phase Winding Design: Wound to strict Class F/H insulation standards for high dielectric withstand capability, minimizing I²R copper losses and operating coolly on Canadian standard and industrial 575V–600V distribution networks.
2. Integral Thermal Overload Protection: Factory-embedded bi-metallic thermal cutouts trip control or power circuits during locked-rotor or high heat-soak incidents, mitigating internal winding flashover and shorted turns.
3. Corrosion-Resistant Structural Construction: NEMA 56 frame with electrophoretic primer and epoxy outer coating engineered to resist salt-fog corrosion, high humidity, and aggressive ambient airborne industrial effluents.
4. Double-Shielded Heavy Ball Bearings: Pre-lubricated with high-temperature synthetic polyurea grease, resisting dynamic radial air loads and axial aerodynamic thrust from direct-drive propeller fans in horizontal or shaft-up/down installations.

Motor Compatibility

• Carrier Commercial Packaged Chillers & Air-Cooled Condensers: 38AH, 38AE, 38AKS, 38AP, 09DP, 09DK series.
• Carrier Rooftop Units (RTU): Select WeatherMaster® and Centurion® 575V models.
• Commercial Brands: Directly replaces identical OEM fan motors across Bryant and Payne industrial product platforms.

Cross-Reference Part Numbers

• Carrier OEM SKU: HD52AZ576
• Carrier Replacement SKU: HD58CH575
• Low-Voltage Sister Variants (Reference Only – Not Interchangeable): HD52AZ226 (208–230V variant), HD52AZ386 (380–460V variant)

Frequently Asked Questions

What is the exact replacement part number for the Carrier HD52AZ576?

The direct Carrier factory supersession and replacement part number for the HD52AZ576 is the Carrier HD58CH575. It retains identical 3HP, 575V, 3-phase electrical specs and 56-frame mounting dimensions.

Can I run the HD52AZ576 on a 460V or 480V 3-phase supply?

No. Operating a 575V motor on 460V causes a severe voltage deficit of roughly 20%. This under-voltage condition dramatically increases stator current draw, triggering the internal thermal protector or causing motor failure. For 460V systems, use the specific 460V equivalent (such as the HD52AZ386).

How do I reverse the rotation direction on the HD52AZ576 motor?

Because this is a three-phase motor, reversing rotational direction is accomplished by safely isolating power, locking out the electrical disconnect, and swapping any two incoming phase supply leads (e.g., swapping Lead 1 and Lead 2 at the motor terminal block or load-side contactor).

Does this motor require a run capacitor?

No. The HD52AZ576 is a polyphase (three-phase) squirrel-cage induction motor. Three-phase motors establish a rotating magnetic field via the natural 120-degree phase displacement of the utility supply and do not require start or run capacitors.

What causes the internal thermal protector to trip on this condenser fan motor?

Trips typically stem from abnormal conditions: restricted airflow through a fouled condenser coil causing aerodynamic overload, low supply voltage causing higher amp draws, single-phasing (loss of one electrical phase), or mechanical binding in the fan hub and bearings.