this electric heat sequencer provides the necessary switching reliability and mechanical durability required for demanding 3-wire power systems

Thermal Resistance: Materials selected to withstand localized heat near the burner assembly without degrading

engineered to provide essential thermal management for the inducer motor during high-load combustion cycles

It means the relay has one common input and two possible outputs (NO and NC)

The Siemens QAC2012U is a professional-grade 1000 ohm platinum RTD outdoor temperature sensor designed for demanding building automation systems (BAS) and HVAC operations

Belimo ZG-103 Bracket this electric heat sequencer providesThe Belimo ZG 103 is a heavy duty universal right angle bracket engineered for specialized applications where a damper shaft is inaccessible or a standard direct mount configuration is not feasible. Constructed from 12 gauge galvanized steel, this actuator mounting bracket provides a rigid, vibration resistant foundation for high torque applications. Its versatile hole pattern is specifically designed to accommodate Belimo GM, AM, and NM series