The Thermostat 518 accurately controls the room temperature for a hydronic heating zone using Pulse Width Modulation (PWM) technology. Simple up and down buttons and a display with large type make this thermostat easy to read and use. The 518 automatically detects a single auxiliary sensor to measure either outdoor, floor or remote room temperature.
Auto Heating Cycle
Auxiliary Sensor Input
Outdoor & Floor Temperature Display
Freeze Protection
Pulse Width Modulation
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