Resideo TH115-AF-120S Thermostat 318423-701 also identified by model number

also identified by model number MA559

Confirm that your system is a 3-ton capacity unit utilizing R-22 refrigerant

Use the integrated 1/4" needle drain valve to blow down the gauge regularly to prevent sediment buildup

95" outside diameter (OD) and provides a versatile pitch range of 4

Resideo TH115-AF-120S Thermostat 318423-701 also identified by model numberFor contractors and HVAC professionals, the Resideo TH115 AF 120S Thermostat is the industry standard for managing high capacity electric heating systems. Engineered with a dedicated epoxy soundproofed relay, this unit eliminates the invasive clicking noise typical of mechanical line voltage controls, making it ideal for high end residential and commercial floor heating or electric baseboard heater retrofits. This 120 Vac vertical mount controller