Universal Compatibility: Fits various rectangular thermostats

this is a 120V relay specifically rated for 120VAC line voltage

the RA-911 works seamlessly with both 2-wire and 4-wire detector bases

non-mercury alternative that remains easy to read in low-light mechanical rooms

Resideo TH6220U2000 Thermostat 30067439-890 Universal Compatibility: Fits various rectangularThe Resideo TH6220U2000 is a versatile T6 Pro Programmable Thermostat engineered for multi stage applications, supporting up to 2 Heat 2 Cool Conventional Systems and 2 Heat 1 Cool Heat Pumps. Designed with a flexible scheduling architecture, it allows technicians to configure 7 day, 5 1 1 day, 5 2 day, or non programmable modes depending on the clients preference. This unit operates on 20 30 Vac and offers dual power options, running via C wire