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Dayton 3LU90 open-frame blower motor with resilient-ring mounting and 6 in shaft

Dayton

Dayton 3LU90 1 hp HVAC blower motor

SKU CH-ZJ77-GMQQ5

Single-phase permanent-split-capacitor blower motor delivering 1 hp at 625 RPM with three-speed operation on 208-230 V AC

  • 1 hp permanent-split-capacitor motor delivers reliable HVAC airflow
  • Three selectable speeds match ventilation demand precisely
  • 208-230 V single-phase supply suits standard commercial wiring
  • Auto thermal protection and Class B insulation guard against overheating
  • Resilient-ring stud mount allows all-angle installation flexibility

HVAC Direct-Drive Blower Motor

The Dayton 3LU90 is a new single-phase permanent split capacitor motor rated at 1 hp for continuous-duty HVAC air-handling applications. It operates on 208-230 V AC at 60 Hz with a nameplate speed of 625 RPM and three selectable speeds. The 48YZ frame fits resilient-ring or stud mounting in any orientation.

Voltage and Frame Compatibility

The motor requires a 208-230 V AC supply drawing 6.0 to 6.8 full-load amps and a 48YZ frame mounting pattern. Installers must verify that the existing circuit and mounting provisions match these exact electrical and mechanical specifications before purchase.

Continuous-Rated Thermal Behaviour

Class B insulation and automatic thermal protection allow continuous operation at up to 40 °C ambient temperature with a 1.0 service factor. The open air-over enclosure relies on the driven airflow for cooling, so sustained load performance depends on maintaining proper air movement across the motor.

Highlights

  • 1 hp permanent-split-capacitor motor delivers reliable HVAC airflow
  • Three selectable speeds match ventilation demand precisely
  • 208-230 V single-phase supply suits standard commercial wiring
  • Auto thermal protection and Class B insulation guard against overheating
  • Resilient-ring stud mount allows all-angle installation flexibility

Specifications

BrandDAYTON

Questions about this item

What does the 1 hp rating mean when the motor is installed in an HVAC system?

It delivers up to one horsepower of continuous mechanical output at full load, driving the blower wheel at the rated speed for air-handling duties.

How does the 208-230 V AC supply affect the 6.0-6.8 A full-load current in practice?

At 208 V the motor draws near 6.8 A; at 230 V it draws closer to 6.0 A, so circuit sizing must accommodate the higher figure.

What does the 48YZ frame and resilient-ring stud mounting require for installation?

A 48YZ frame cutout with bolt holes for the resilient ring studs, plus a 6 in shaft length for coupling to the blower wheel.

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