Dayton
Dayton 3LU81 HVAC control motor 1/2hp 115V 625RPM
A direct-drive blower motor delivering 1/2 hp at 625 RPM from a 115 V supply
- 1/2 hp permanent-split-capacitor motor delivers reliable airflow
- Three selectable speeds match ventilation needs precisely
- 115 V AC single-phase power suits standard residential wiring
- Auto thermal protection prevents overheating during continuous duty
- 48YZ frame with ring/stud mount fits multiple blower housings
Motor purpose and fit
The Dayton 3LU81 is a direct-drive blower motor rated at 1/2 horsepower for 115V AC single-phase supply. It suits HVAC equipment that requires a permanent split-capacitor design with three selectable speeds and continuous-duty operation.
Thermals noise and power
Auto-reset thermal protection and Class B insulation guard the windings during continuous running at up to 40 degrees C ambient. The open air-over enclosure relies on the airstream it moves for cooling, while the motor draws 5.5 amps at full load on a 60 Hz supply.
Mounting and rotation flexibility
A 48YZ frame with ring and stud mounting lets the unit be installed at any angle, and the shaft can be run clockwise or counter-clockwise to match the blower wheel. This adaptability removes the need for a separate motor variant when the airflow direction changes.
Highlights
- 1/2 hp permanent-split-capacitor motor delivers reliable airflow
- Three selectable speeds match ventilation needs precisely
- 115 V AC single-phase power suits standard residential wiring
- Auto thermal protection prevents overheating during continuous duty
- 48YZ frame with ring/stud mount fits multiple blower housings
Specifications
| Brand | DAYTON |
|---|
Questions about this item
How do I wire the three-speed permanent-split-capacitor motor for the correct rotation?
Connect the 115 V AC supply to the common and desired speed taps; reverse any two leads to switch between CW and CCW rotation.
When should I plan to replace the motor bearings under continuous duty?
The open air-over enclosure and Class B insulation run continuously at up to 40 °C ambient; bearings typically last several years before noise or vibration signals replacement.
What thermal limit stops the motor first during extended operation?
The automatic thermal protector trips when internal temperature exceeds the Class B limit, shutting the motor down until it cools.
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