Low Water Cutoff

Overview

The Taco Low Water Cutoff is a probe-style low water cutoff that features patented DualVision Technology, external LEDs, simplified wiring for installation and testing, and automatic and manual reset modes; models are available in 24VAC or 120VAC. It can act as either the primary or secondary low water cutoff on low-pressure steam boilers, serve as the primary limit control on hot water boilers, protect pumps from running dry in condensate receiver tank applications, and activate alarm systems or automatic water feeders. Performance Data for LF, LTA-2 and LTR models includes model-specific maximum pressures, ambient temperatures, probe sensitivity, control power consumption, and input supply voltage. Key model specifications from the provided data: - LF Model — Max. Pressures Steam: 250 psi (17.6 kg/cm2) - LF Model — Max. Pressures Hot Water: 250 psi (17.6 kg/cm2) @250°F (121°C) - LF Model — Max. Ambient Temp.: 150°F (66°C) - LF Model — Delays: Automatic - LF Model — Probe Sensitivity: 20K Ohms, extended operation to 40K Ohms - LF Model — Control Power Consumption: 3VA @ 120VAC, 3VA @ 24VAC - LF Model — Input Supply Voltage: 120VAC, 24VAC* - LTA-2 Model — Max. Pressures Hot Water: 250 psi (17.6 kg/cm2) @250°F (121°C) - LTA-2 Model — Max. Ambient Temp.: 150°F (66°C) - LTA-2 Model — Probe Sensitivity: 20K Ohms, extended operation to 40K Ohms - LTA-2 Model — Control Power Consumption: 2.8VA @ 120VAC, 2.8VA @ 24VAC - LTA-2 Model — Input Supply Voltage: 120VAC, 24VAC* - LTR Model — Max. Pressures Hot Water: 160 psi (11.2 kg/cm2) @250°F (121°C) - LTR Model — Max. Ambient Temp.: 120°F (49°C) - LTR Model — Probe Sensitivity: 20K Ohms, extended operation to 40K Ohms - LTR Model — Control Power Consumption: 1.5VA @ 120VAC, 1.5VA @ 24VAC - LTR Model — Input Supply Voltage: 24VAC* *24VAC supplied by a Class 2 power source Documented applications include Hot Water Heating Systems, Closed Cooling Circuits, Air Conditioning Systems, Hydronic Heating & Cooling, systems with water/glycol concentrations up to 50%, and Solar / Geothermal installations. The product is offered in multiple model variants (LFA1203S-1, LFM1203S-1, LFA0243S-1, LFM0243S-1, LFA1203R-1, LFM1203R-1, LFA1202R-1, LFM1202R-1, LFA0242R-1, LTA0243S-2, LTA1203S-2, LTR0243T-1, EWF120, EWF024) and a case study titled "Jamestown Island Home" is referenced.