McDonnell & Miller RB-24SE is a 24V residential-grade, compact low water cut-off (LWCO), which is an improved version of the classic RB-24E design - delivering the same protection and performance in less space, with smaller footprint. Immediately interrupts power in a low water condition. Automatically restarts the burner when water level is back to normal. Features a test button for checking control functionality without lowering water level or removing the probe. Self-cleaning probe reduces maintenance to every five years. Includes universal wiring harness compatible with all modern residential gas boilers.
Cross-References:
- McDonnell & Miller: RB24-E
- Hydrolevel: 1100
- Taco: LTR024
- Self-cleaning probe reduces maintenance to every 5 years
- Universal wiring is compatible with a 100% of all modern residential gas boilers
- Replaces legacy best-seller RB-24E residential LWCO, now featuring smaller compact design
- Detects low water levels in a hot water boiler and automatically shuts it down to prevent potential hazards
- Test button for easy diagnostics without lowering the water level or removing the probe
- Auto reset mode - resumes operation when water level is back to normal or after power outage
- Multiple wiring options for control and burner circuit with different voltages
- Secure metal-to-metal seal and leak-free installation
- (2) External multi-function LEDs display power and low water statuses
- Suitable for 50% water/glycol mixes
- cULus listed
- System Type Compatibility: Hot Water Boilers
- Reset: Automatic
- Connection: 3/4" NPT
- Electrical Specs: 24V, 60 Hz, 2.5 VA (Power Consumption), NEMA 1 Enclosure
- Probe Sensitivity: 15,000 ohms
- Switching Capacity: 2 Amps @ 24 VAC
- Max Pressure: 160 psi (Water)
- Max Water Temperature: 250°F
- Max Ambient Temperature: 120°F
1-year warranty from the date of installation; 2-year warranty from the date of manufacture
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