Resideo TH135-01-B Thermostat 323055-751 Manual Override: A integrated lock-down

Manual Override: A integrated lock-down door enables technicians to maintain contact state manually for circuit testing and performance verification

Operating at 460Vac single phase

Its cast iron construction and Totally Enclosed Air Over (TEAO) design ensure maximum protection against moisture and airborne contaminants

Using this ballast with under-wattage or over-wattage lamps from other manufacturers can cause immediate driver failure or lamp rupture

Transform failure is typically caused by a secondary-side short circuit—often a grounded thermostat wire or a shorted contactor coil—rather than a flaw in the transformer itself

Resideo TH135-01-B Thermostat 323055-751 Manual Override: A integrated lock-downThe Resideo TH135 01 B is a contractor grade non programmable thermostat engineered for precise 1 heat control in hydronic heating and low voltage forced air systems. Operating on a 24Vac or 24Vdc power supply, this electronic unit features a high density vertical mount design, making it an ideal retrofit for aging mechanical thermostats. It utilizes a thermistor sensing element to maintain 1F temperature accuracy, significantly reducing temperature