Lennox 88K09 Thermal Relay

The Lennox 88K09 Thermal Relay is a heat sequencer that is applicable in HVAC systems to regulate the timely turn on of heating elements blowers or other auxiliary components. It makes sure that electrical loads of high demand are turned on and off in a controlled to avoid power bursts and enhance the efficiency of the system. This thermal relay is a low-voltage control signal, and internal heat-activated switches are used to delay the switching of circuits on and off. Each stage is activated only after a short built-in time delay to permit activation of heating elements or fans one at a time.