
Mepco (Dunham Bush) S402 Motor
The Mepco (Dunham Bush) S402 Motor is a high-performance, 3450 RPM power unit engineered for the demanding cycles of industrial condensate return pumps and HVAC centrifugal pump systems. Built with a 56J frame and featuring a robust steel frame with an aluminum flange, this 1/3 HP motor is designed to withstand the corrosive environments common in steam and hydronic heating applications. This single-phase electric motor offers versatile 115/230V dual voltage compatibility, allowing for seamless integration into various field electrical configurations. The open drip-proof (ODP) enclosure ensures optimal cooling and protection against moisture in indoor plant environments, maintaining mechanical integrity during continuous high-speed operation. Designed as a direct replacement for the Guardian Series and compatible with the Baldor JL1205A, the S402 provides the high torque and reliable shaft output necessary for consistent fluid and air movement in commercial mechanical rooms.
Key Benefits:- Optimized Performance: Operates at a high-speed 3450 RPM to deliver immediate head pressure for condensate and booster pump applications.
- Installation Flexibility: Dual voltage rating of 115/230V simplifies HVAC motor replacement by matching existing site power.
- Durable Construction: Features a moisture-resistant ODP enclosure and a heavy-duty 56J frame for long-term service in boiler rooms.
- Precision Compatibility: Serves as a standard OEM replacement motor for Mepco and Dunham Bush steam equipment, including Guardian G00312 units.
Is the S402 motor compatible with all Mepco Guardian pumps?
The Mepco S402 is the standard 1/3 HP specification for many Guardian series condensate pumps; however, always verify the 56J frame size and shaft dimensions on your current electric motor nameplate before installation.
How do I wire the motor for 115V versus 230V?
Field technicians should refer to the internal wiring diagram found inside the conduit box. This dual voltage motor requires specific lead configurations to match the supply line voltage to ensure correct motor rotation and prevent winding damage.
Can this motor be used in outdoor applications?
This is an Open Drip-Proof (ODP) motor, which is primarily intended for indoor use where it is protected from direct rain. For high-moisture or outdoor environments, ensure the mounting position prevents liquid from entering the ventilation openings.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $262.27
-65%$262.27
$91.79Mepco (Dunham Bush) S402 Motor
The Mepco (Dunham Bush) S402 Motor is a high-performance, 3450 RPM power unit engineered for the demanding cycles of industrial condensate return pumps and HVAC centrifugal pump systems. Built with a 56J frame and featuring a robust steel frame with an aluminum flange, this 1/3 HP motor is designed to withstand the corrosive environments common in steam and hydronic heating applications. This single-phase electric motor offers versatile 115/230V dual voltage compatibility, allowing for seamless integration into various field electrical configurations. The open drip-proof (ODP) enclosure ensures optimal cooling and protection against moisture in indoor plant environments, maintaining mechanical integrity during continuous high-speed operation. Designed as a direct replacement for the Guardian Series and compatible with the Baldor JL1205A, the S402 provides the high torque and reliable shaft output necessary for consistent fluid and air movement in commercial mechanical rooms.
Key Benefits:- Optimized Performance: Operates at a high-speed 3450 RPM to deliver immediate head pressure for condensate and booster pump applications.
- Installation Flexibility: Dual voltage rating of 115/230V simplifies HVAC motor replacement by matching existing site power.
- Durable Construction: Features a moisture-resistant ODP enclosure and a heavy-duty 56J frame for long-term service in boiler rooms.
- Precision Compatibility: Serves as a standard OEM replacement motor for Mepco and Dunham Bush steam equipment, including Guardian G00312 units.
Is the S402 motor compatible with all Mepco Guardian pumps?
The Mepco S402 is the standard 1/3 HP specification for many Guardian series condensate pumps; however, always verify the 56J frame size and shaft dimensions on your current electric motor nameplate before installation.
How do I wire the motor for 115V versus 230V?
Field technicians should refer to the internal wiring diagram found inside the conduit box. This dual voltage motor requires specific lead configurations to match the supply line voltage to ensure correct motor rotation and prevent winding damage.
Can this motor be used in outdoor applications?
This is an Open Drip-Proof (ODP) motor, which is primarily intended for indoor use where it is protected from direct rain. For high-moisture or outdoor environments, ensure the mounting position prevents liquid from entering the ventilation openings.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Mepco (Dunham Bush) S402 Motor is a high-performance, 3450 RPM power unit engineered for the demanding cycles of industrial condensate return pumps and HVAC centrifugal pump systems. Built with a 56J frame and featuring a robust steel frame with an aluminum flange, this 1/3 HP motor is designed to withstand the corrosive environments common in steam and hydronic heating applications. This single-phase electric motor offers versatile 115/230V dual voltage compatibility, allowing for seamless integration into various field electrical configurations. The open drip-proof (ODP) enclosure ensures optimal cooling and protection against moisture in indoor plant environments, maintaining mechanical integrity during continuous high-speed operation. Designed as a direct replacement for the Guardian Series and compatible with the Baldor JL1205A, the S402 provides the high torque and reliable shaft output necessary for consistent fluid and air movement in commercial mechanical rooms.
Key Benefits:- Optimized Performance: Operates at a high-speed 3450 RPM to deliver immediate head pressure for condensate and booster pump applications.
- Installation Flexibility: Dual voltage rating of 115/230V simplifies HVAC motor replacement by matching existing site power.
- Durable Construction: Features a moisture-resistant ODP enclosure and a heavy-duty 56J frame for long-term service in boiler rooms.
- Precision Compatibility: Serves as a standard OEM replacement motor for Mepco and Dunham Bush steam equipment, including Guardian G00312 units.
Is the S402 motor compatible with all Mepco Guardian pumps?
The Mepco S402 is the standard 1/3 HP specification for many Guardian series condensate pumps; however, always verify the 56J frame size and shaft dimensions on your current electric motor nameplate before installation.
How do I wire the motor for 115V versus 230V?
Field technicians should refer to the internal wiring diagram found inside the conduit box. This dual voltage motor requires specific lead configurations to match the supply line voltage to ensure correct motor rotation and prevent winding damage.
Can this motor be used in outdoor applications?
This is an Open Drip-Proof (ODP) motor, which is primarily intended for indoor use where it is protected from direct rain. For high-moisture or outdoor environments, ensure the mounting position prevents liquid from entering the ventilation openings.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.











