Dayton
Dayton 3LU85 HVAC Control 3/4 hp 115V 625 RPM 8.8 A
Single-phase blower motor delivers 3/4 hp at 115 V with three-speed operation and automatic thermal protection
- 3/4 hp permanent-split-capacitor motor delivers reliable airflow
- 115 V single-phase operation suits standard residential wiring
- Three-speed 625 RPM design matches variable ventilation needs
- Auto thermal protection and Class B insulation guard against overheating
- Resilient-ring stud mounting allows all-angle installation flexibility
Motor Purpose and Audience
The Dayton 3LU85 is a single-phase permanent split capacitor blower motor rated at 3/4 hp for 115V AC systems. It suits HVAC technicians and maintenance crews who need a direct-drive replacement that runs continuously at up to 40 degrees C ambient temperature.
Capacity and Limits
The motor delivers 625 RPM at full load while drawing 8.8 A, with three selectable speeds and a 1.0 service factor for steady duty. Thermal protection is automatic, insulation class B handles the rated heat rise, and the 48YZ frame fits existing resilient-ring or stud mounts.
Build Integration
A 1/2-inch diameter shaft extends 6 inches and rotates CW or CCW to match the original blower wheel. The open air-over enclosure requires airflow from the driven fan for cooling, and the all-angle mounting position lets the unit sit in any orientation the chassis allows.
Highlights
- 3/4 hp permanent-split-capacitor motor delivers reliable airflow
- 115 V single-phase operation suits standard residential wiring
- Three-speed 625 RPM design matches variable ventilation needs
- Auto thermal protection and Class B insulation guard against overheating
- Resilient-ring stud mounting allows all-angle installation flexibility
Specifications
| Brand | DAYTON |
|---|
Questions about this item
Will the 3/4 hp motor replace my existing 48YZ frame blower?
The motor uses a standard 48YZ frame with a 1/2 inch diameter shaft that is 6 inches long, matching the mounting pattern and shaft size of many existing blower assemblies.
How can I confirm the motor runs correctly after wiring it?
With power applied the motor should start in either clockwise or counter-clockwise direction, reach the nameplate speed of 625 RPM and draw no more than 8.8 amps at full load while the automatic thermal protection remains inactive.
Does the 3LU85 come with a capacitor or mounting hardware?
The motor is a permanent split capacitor design with a resilient ring and stud mounting arrangement included; a compatible run capacitor matched to the 115V 8.8A rating must be sourced separately.
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