Johnson Bilge Pump Switch Wiring Diagram

Wiring a Bilge Pump with Float Switch: A Comprehensive Guide

Introduction

Bilge pumps are essential components in any marine vessel, responsible for removing excess water and preventing flooding. Wiring a bilge pump correctly is crucial for ensuring its proper functionality and safety on board.

Wiring Diagrams

Before wiring any bilge pump, it's essential to consult the manufacturer's wiring diagram. These diagrams typically provide detailed instructions on how to connect the pump to the power source, float switch, and any other necessary components.

SPX FLOW Johnson Pump Panels

For bilge pumps installed with an SPX FLOW Johnson Pump panel, follow the wiring diagram provided on pages 22-25 of the manual. The diagram outlines the specific connections for the pump, float switch, and panel.

Connection Procedures

Once you have the wiring diagram in hand, follow these general steps to wire a bilge pump with a float switch:

1. Connect the pump to the power source: Identify the positive and negative terminals on both the pump and the power source. Connect the positive terminals together and the negative terminals together.
2. Install the float switch: Mount the float switch at the desired water level. Connect the switch's wires to the appropriate terminals on the pump.
3. Seal the wire connections: Use marine-grade heat shrink tubing or other appropriate sealant to protect the wire connections from moisture and corrosion.
4. Test the pump: Manually activate the float switch to check if the pump is functioning correctly.

Additional Considerations

In addition to following the manufacturer's wiring diagram, keep these additional considerations in mind:

• Use appropriate wire size: Consult the wiring diagram for the recommended wire size based on the amperage of the pump.
• Protect the wires from damage: Run the wires through a conduit or other protective enclosure to prevent damage from abrasion or water.
• Consider an alarm system: Install a bilge pump alarm to alert you of potential flooding or pump failure.
• Regular maintenance: Inspect and test your bilge pump and float switch regularly to ensure they are in good working order.

Conclusion

Wiring a bilge pump with a float switch is a critical task for ensuring the safety of your marine vessel. By following the manufacturer's wiring diagram, using the correct connection procedures, and considering additional safety measures, you can ensure that your bilge pump is operating optimally and protecting your boat from flooding.