Description
McDonnell & Miller RB-122E is a 120V residential-grade low water cut-off (LWCO) for hot water boilers. 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 short-sized probe (fits into a standard tee fitting).
Cross-References:
- McDonnell & Miller: RB122-E (Old)
- Hydrolevel: 1150
- Taco: LTA120
Features:
- 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
- Patented Self-Cleaning Probe reduces maintenance to once in every 5 years
- Compact-sized design
- Multiple wiring options for control and burner circuit with different voltages
- Back access cover with electrical knock-outs for easy wiring
- 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
Technical Specifications:
- System Type Compatibility: Hot Water Boilers
- Reset: Automatic
- Connection: 3/4″ NPT
- Electrical Specs: 120V, 60 Hz, 3.1 VA (Power Consumption), NEMA 1 Enclosure
- Probe Sensitivity: 20,000 ohms
- Pump Circuit Rating: 5.8 FLA, 34.8 LRA @ 120 VAC
- Pilot Duty Rating: 125 VA @ 120 VAC
- Switching Capacity: 5.8 Amps @ 120 VAC
- Max Pressure: 160 psi (Water)
- Max Water Temperature: 250°F
- Max Ambient Temperature: 120°F
Warranty:
1-year warranty from the date of installation; 2-year warranty from the date of manufacture
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