In a warm-air heating system, when will the lockout relay de-energize?

In a warm-air heating system, the lockout relay plays a critical role in ensuring safe operation. The lockout relay de-energizes, meaning it will stop supplying power to the heating system, typically when the contacts on the motor protector open. The motor protector functions as a safety device that monitors the operation of the blower motor. If it senses that the motor is overheating or experiencing a fault, it opens the circuit, which causes the relay to de-energize and thereby prevent the system from operating until the issue is resolved.

This mechanism is crucial because it helps to avoid damage to the motor and maintains system safety. Once the problem has been addressed, the motor protector can reset, allowing the heating system to operate again. Understanding this relationship is essential for diagnosing issues within warm-air heating systems and ensuring efficient and safe operation.