RB-122E GuardDog, Low Water Cut-Off w/ Auto Reset & Test Button, 120V McDonnell & Miller
RB-122E GuardDog, Low Water Cut-Off w/ Auto Reset & Test Button, 120V
Brand: McDonnell & Miller
Part#: 144703
Model: RB-122E
Usually ships: Upon availability

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

Documents

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