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Low Water Cutoff

Accurate, Dependable Protection for All Boiler Types
The Taco Low Water Cutoff provides accurate and dependable protection for all types of boilers, from small residential hot water boilers to large industrial steam units. This probe-style Low Water Cutoff features patented DualVision Technology, external LED’s and simplified wiring for easy installation and testing and automatic, manual reset mode and are available in 24VAC or 120VAC models. The Taco Low Water Cutoff can act as either the primary or secondary low water cutoff on low-pressure steam boilers, the primary limit control on hot water boilers or to protect pumps from running dry in condensate receiver tank applications. The Low Water Cutoff can also activate alarm systems or automatic water feeders.
Catalog Instruction Sheet
Submittal Data
Visio Zone Control Stencil
Zone Control Wiring Guide
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Performance Data
LF Model
Max. Pressures Steam: 250 psi (17.6 kg/cm2)
Max. Pressures Hot Water: 250 psi (17.6 kg/cm2) @250˚F (121˚C)
Max. Ambient Temp.: 150˚F (66˚C)
Delays: Automatic
Probe Sensitivity: 20K Ohms, extended operation to 40K Ohms
Control Power Consumption: 3VA @ 120VAC, 3VA @ 24VAC
Input Supply Voltage: 120VAC, 24VAC*

LTA-2 Model
Max. Pressures Hot Water: 250 psi (17.6 kg/cm2) @250˚F (121˚C)
Max. Ambient Temp.: 150˚F (66˚C)
Probe Sensitivity: 20K Ohms, extended operation to 40K Ohms
Control Power Consumption: 2.8VA @ 120VAC, 2.8VA @ 24VAC
Input Supply Voltage: 120VAC, 24VAC*

LTR Model
Max. Pressures Hot Water: 160 psi (11.2 kg/cm2) @250˚F (121˚C)
Max. Ambient Temp.: 120˚F (49˚C)
Probe Sensitivity: 20K Ohms, extended operation to 40K Ohms
Control Power Consumption: 1.5VA @ 120VAC, 1.5VA @ 24VAC
Input Supply Voltage: 24VAC*

*24VAC supplied by a Class 2 power source

Features
  • Probe Style Low Water Cutoff
  • Worry Free Operation
  • Simplified Installation & Wiring
  • LED Verification
  • Selection Ease
  • Seamless Integration
Applications
  • Hot Water Heating Systems
  • Closed Cooling Circuits
  • Air Conditioning Systems
  • Hydronic Heating & Cooling
  • Water/Glycol concentrations up to 50%
  • Solar / Geothermal
Case Studies

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