York S1-024-19082-028 Heat Sequencer Relay 24V

The York S1-024-19082-028 Heat Sequencer Relay is used in HVAC systems, particularly in electric furnaces and heat pumps with electric auxiliary heat. This part determines the sequence in heating elements are switched on, avoiding a situation where there is a sudden draw of current that may be too much for the system. As the heating elements are staged by the sequencer relay, the temperature is more uniform and comfortable, the load on the electrical system is less, and energy consumption is optimized. This staged heating also increases the durability of the heating elements and other HVAC system parts as well as saves energy.