Dayton
Dayton 4YY54 PSC Motor 1/4 HP 1140 RPM 115V 48Y OAO
Permanent split capacitor motor delivers 1/4 hp at 1140 rpm on 115 V AC for fan and blower applications
- 1/4 HP PSC motor delivers 1140 RPM for fan and blower duty
- 115 V single-phase input draws 3.2 A at full load
- 48 frame open air-over enclosure suits direct replacement of 4HZ49 and 4HZ51
- Auto thermal protection and Class B insulation support continuous operation at 40 °C
- Reversible CW/CCW shaft rotation simplifies installation across HVAC equipment
Motor Type and Application
This is a permanent split capacitor motor rated at one-quarter horsepower and 1,140 RPM for single-phase 115 V AC operation. It fits a standard 48 frame and carries an open air-over enclosure designed for direct airflow cooling in fan and blower assemblies.
Suitable Uses and Limits
The motor suits HVAC technicians replacing units marked 4HZ49 or 4HZ51 who need continuous-duty operation at up to 40 °C ambient with automatic thermal protection. It is not for installations requiring 200 V or 208 V supply, nor for applications needing multiple speed taps or a totally enclosed housing.
Decisive Specification
The nameplate speed of 1,140 RPM at 60 Hz defines the airflow delivery and must match the original equipment specification. Verify the 3.2 A full-load current and clockwise or counter-clockwise rotation against the wiring diagram before installation.
Highlights
- 1/4 HP PSC motor delivers 1140 RPM for fan and blower duty
- 115 V single-phase input draws 3.2 A at full load
- 48 frame open air-over enclosure suits direct replacement of 4HZ49 and 4HZ51
- Auto thermal protection and Class B insulation support continuous operation at 40 °C
- Reversible CW/CCW shaft rotation simplifies installation across HVAC equipment
Specifications
| Brand | DAYTON |
|---|
Questions about this item
Does the 48-frame motor need a specific mounting bracket or base to install?
The 48-frame motor fits standard NEMA 48 mounting patterns, so existing brackets or resilient bases for that frame size will work.
Can the 115 V PSC motor run on a 208 V supply if I keep the older wiring?
The specifications state it is not usable at 208 V or 200 V, so the existing 115 V circuit must be retained.
How do I confirm the motor is turning at the correct 1140 RPM after wiring it?
With power applied, the shaft should rotate freely in either CW or CCW direction and reach the nameplate speed of 1140 RPM under load.
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