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Dayton 3/4 hp HVAC blower motor, open frame, resilient ring mount, 6 inch shaft

Dayton

Dayton 3LU86 3/4 hp HVAC blower motor

SKU CH-H2DB-AC2G1

Three-speed permanent-split-capacitor blower motor delivers ¾ hp at 625 rpm on 208-230 V AC for continuous HVAC duty

  • 3/4 hp motor delivers strong airflow for HVAC systems
  • Three-speed operation lets you match output to demand
  • 208-230 V single-phase power suits standard commercial wiring
  • Auto thermal protection prevents overheating during continuous duty
  • Resilient-ring mounting reduces vibration for quiet all-angle installation

Dayton 3LU86 Blower Motor — Application

The Dayton 3LU86 is a direct-drive blower motor rated at 3/4 hp for HVAC systems. It operates on single-phase 208-230V AC power at 60 Hz. The permanent split capacitor design provides three-speed operation at a nameplate speed of 1,625 RPM. This motor suits residential or light-commercial air-handling units that require continuous-duty airflow.

48YZ Frame and Open Air-Over Enclosure Constraints

The 48YZ frame and open air-over enclosure dictate installation limits. The motor must mount in the airstream to stay within the 40 °C maximum ambient temperature. Resilient ring and stud mounting allow all-angle positioning, but the 6-inch shaft length and CW/CCW rotation fix the mechanical interface. Auto thermal protection and Class B insulation set the electrical safety boundary.

3/4 hp Capacity and Continuous-Duty Headroom

At full load the motor draws 4.4–4.2 A with a 1.0 service factor, leaving no overload margin for continuous duty. It comfortably handles standard blower wheels matched to 3/4 hp at 1,625 RPM across three speeds. It runs out when static pressure or wheel inertia demands more torque than the nameplate rating or when ambient temperatures exceed 40 °C.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $152.99
Pricier than about 77% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameDAYTON

Questions about this item

Is the 3/4 hp rating the right choice for my furnace or air-handler?

Choose 3/4 hp when the original motor nameplate lists the same horsepower; it matches the load the blower wheel was designed for.

What does 1,625 RPM mean once the motor is installed?

The shaft turns at 1,625 revolutions per minute under full load, delivering the airflow the system was engineered for at that speed.

How does the 208-230 V single-phase supply affect performance?

The motor draws 4.4 A at 208 V and 4.2 A at 230 V, so current drops slightly as voltage rises within the rated range.

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