Description
The Xylem-McDonnell & Miller RB-24SE is a 24-volt universal wiring harness designed for use with McDonnell & Miller Low Water Cut-Off (LWCO) controls. Engineered to simplify field installation and ensure reliable electrical connections, this wiring accessory is a trusted solution for boiler service professionals and hydronic heating contractors.
Product Overview
The RB-24SE provides a universal wiring interface for compatible McDonnell & Miller LWCO devices, reducing installation time and minimizing the risk of wiring errors. Operating at 24V, it is suited for integration with modern low-voltage boiler control systems.
Key Features
- Universal wiring harness compatible with McDonnell & Miller LWCO controls
- 24-volt operating voltage for low-voltage boiler control applications
- Simplifies field wiring and reduces installation complexity
- Designed for reliable, long-term performance in hydronic and steam boiler systems
- Manufactured by Xylem-McDonnell & Miller, a trusted name in boiler safety controls
Application
- Hydronic and steam boiler systems requiring low water cut-off protection
- Replacement or upgrade wiring for existing McDonnell & Miller LWCO installations
- New boiler control panel wiring projects
Why Choose McDonnell & Miller?
McDonnell & Miller, a brand under Xylem, has been a leading manufacturer of boiler safety controls for over a century. Their LWCO products are widely specified by engineers and trusted by contractors for dependable boiler protection in residential and commercial applications.









