Honeywell L6191B2021U aquastat

Aquastat Honeywell L6191B2021U Dual immersion thermostat 95–140°C / 70–140°C with manual reset for high-temperature systems. The Honeywell L6191B2021U Aquastat is a specialized dual immersion thermostat for heating systems with high operating temperatures (up to 140°C). The device combines two independent functional modules in one housing: a temperature controller (with external adjustment) and a safety limit thermostat with manual reset. Both liquid-filled sensing elements are installed in a common immersion stem and are designed for direct mounting in boilers, water heaters, and other water tanks. The device ensures precise maintenance of the set high temperature and reliable protection of equipment from overheating. If your heating system operates intermittently, does not reach the required temperature, or frequently trips into emergency, the cause may be a faulty original aquastat. Technical specifications: Parameter Value; Part numbers L6191B2021U, 534.109.014; Manufacturer Honeywell (USA/Europe); Mounting type Immersion (with common stem); Sensor type Liquid-filled, two independent; Working medium Water; Module 1 — Control Thermostat: Temperature adjustment range 95–140°C; Switching differential 4–10°C (fixed); Switch type SPDT; Adjustment External round knob; Module 2 — Limit Thermostat (Manual Reset): Temperature adjustment range 70–140°C; Reset type Manual; Switch type SPDT; Adjustment Internal screw; Common specifications: Electrical load (resistive) 10 A at 250 V AC; Electrical load (inductive) 2.5 A at 250 V AC; Electrical load (lock