🔴 3259 U.S. MOTORS Circulator Pump Motor – 1/4 HP, 1725 RPM, 115V, 48YZ (CW)
The 3259 Hot Water Circulating Pump Motor from U.S. Motors (Nidec) is an industry-standard replacement motor engineered specifically for hot water hydronic circulation systems. Featuring a red enamel finish to indicate hot water use, this split-phase motor is designed for quiet operation, dependable startup, and long service life in both residential and commercial HVAC applications.
This motor is a direct replacement for several OEM pump motors commonly used in circulating pump assemblies.
Direct replacement for Bell & Gossett 111040, Armstrong 817025-007, and more.
✅ Key Features
🟢 1/4 HP split-phase motor for hot water circulating pumps
🟢 1725 RPM operating speed for proper hydronic flow
🟢 115V single-phase power (60 Hz)
🟢 48YZ frame with special hot water circulator shaft
🟢 Clockwise (CW) rotation – lead end
🟢 Automatic reset thermal overload protection
🟢 Sleeve bearings with all-angle thrust system
🟢 Resilient hub rings for vibration reduction
🟢 Specially balanced for quiet, low-noise operation
🟢 Red paint finish clearly identifies hot water usage
🟢 Matches OEM mechanical and electrical performance
📊 Specifications Table
| Specification | Details |
|---|
| Part / Catalog Number |
3259 |
| Model Number |
S55JXTJL-7911 |
| Horsepower |
1/4 HP |
| Speed |
1725 RPM |
| Voltage |
115 VAC |
| Phase / Frequency |
Single-Phase / 60 Hz |
| Full Load Amps |
4.6 A |
| Frame Size |
48YZ (Hot Water Circulator) |
| Enclosure |
Open Drip-Proof (ODP) |
| Rotation |
CW (Clockwise) – Lead End |
| Service Factor |
1.25 |
| Insulation Class |
Class B |
| Bearings |
Sleeve bearings, all-angle thrust |
| Ambient Rating |
40°C / 104°F |
| Thermal Protection |
Automatic reset |
| Finish |
Red (hot water rated) |
🔁 Cross Reference Table
| Brand | Part Number |
|---|
| Bell & Gossett |
111040 |
| Armstrong Pumps |
817025-007 |
| Armstrong Pumps |
111050 |
| Nidec / Emerson |
S055TJL7911011B |
| Dayton |
4EL08* |
*Verify specifications for exact match.
⚠️ Common Symptoms This Motor Fixes
-
Circulating pump not running
-
Motor hums but does not turn
-
Overheating or frequent overload trips
-
Excessive vibration or noise
-
Inconsistent hot water circulation
-
Reduced system efficiency
❓ Frequently Asked Questions (FAQ)
Q: Is this a direct replacement motor?
A: Yes. The 3259 is designed to match OEM shaft dimensions, frame size, voltage, and performance of the listed replacements.
Q: Is this motor for hot water systems only?
A: Yes. The red paint, Class B insulation, and bearing design indicate suitability for hot water circulating pump applications.
Q: What rotation does this motor use?
A: Factory set for Clockwise (CW) rotation at the lead end. As a split-phase motor, rotation may be adjustable if required by the pump.
Q: Does this motor include overload protection?
A: Yes. It includes an automatic reset thermal overload protector.
Q: Can this motor be mounted in different positions?
A: Yes. The all-angle thrust sleeve bearing system allows for flexible mounting orientations.
🧭 Shopping Tips
-
✔️ Verify frame size (48YZ) and shaft configuration before ordering
-
✔️ Confirm 115V power supply at the job site
-
✔️ Match horsepower and RPM to the original motor
-
✔️ Designed for hot water circulating pumps only
-
✔️ Professional installation recommended
