Dayton
Dayton 5K279 1/4 hp 1725 RPM 56Z HVAC Control
Single-phase split-phase motor delivers 1/4 hp at 1725 RPM in a 56Z frame for HVAC applications
- 1/4 hp output powers HVAC equipment
- 1725 RPM single-speed suits continuous duty
- 115 V AC supply fits standard circuits
- Open drip-proof enclosure resists moisture
- 56Z frame with flat shaft enables direct mounting
General-purpose motor for HVAC systems
The Dayton 5K279 is a single-phase, split-phase motor rated at 1/4 hp with a nameplate speed of 1,725 RPM. It operates on 115V AC at 60 Hz and fits a 56Z frame with a rigid base mount. The flat shaft design and CW/CCW rotation suit direct-drive blower or fan applications in heating and cooling equipment.
Thermals and power draw in normal use
Continuous duty cycle is supported with a 1.35 service factor and Class B insulation for a maximum ambient temperature of 40 degrees C. The open drip-proof enclosure allows airflow through the steel frame while protecting internal parts from falling moisture. Full-load current is 5.9 A and no internal thermal protection is fitted, so external overload provision is required.
Replaces fixed-speed motors in existing HVAC units
This unit serves as a direct replacement for failed split-phase motors of the same horsepower, voltage, speed and frame size. The jump is worth it when the original motor has seized or burnt out and a like-for-like swap restores airflow without control-board changes. Builders needing variable-speed operation or integrated thermal overloads should select a different design.
Highlights
- 1/4 hp output powers HVAC equipment
- 1725 RPM single-speed suits continuous duty
- 115 V AC supply fits standard circuits
- Open drip-proof enclosure resists moisture
- 56Z frame with flat shaft enables direct mounting
Specifications
| Brand | DAYTON |
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Questions about this item
How do I mount the 56Z frame motor and wire the 115 V single-phase supply correctly?
Bolt the rigid base to a flat surface using the 56Z mounting pattern, connect line voltage to the two motor leads, and verify the shaft turns clockwise or counter-clockwise as needed; the flat shaft requires a set-screw coupling or keyed hub.
What maintenance does the open drip-proof motor with Class B insulation and no thermal protection need over time?
Periodically clean dust from the open vents, check bearing noise and shaft end-play, and ensure the ambient temperature stays below 40 °C; without internal thermal protection the motor relies on the external circuit breaker for overload safety.
At what point does the 1.35 service factor limit continuous operation on a 1/4 hp load?
The motor can deliver up to 1.35 × 1/4 hp continuously; sustained loads above that level will cause winding temperature to exceed the Class B rating first, leading to insulation breakdown.
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