The first stage of a sequencer typically has contacts to perform which function?

The first stage of a sequencer is designed to initiate the operation of the heating system. In most electric heating systems, the sequencer serves as a control device that sequences the activation of the heating elements to prevent excessive electrical loads and facilitate a smooth operation. Starting the blower fan motor is typically the first task performed because it ensures that warm air is circulated effectively throughout the space before the heating elements are activated.

By starting the blower motor first, the system allows for better heat distribution. This preemptive activation helps to prevent any uncomfortable cold drafts when the heating elements begin to warm up. Making sure the blower is operational ensures that any heated air is immediately moved into the living space, thereby maximizing comfort and system efficiency.

The other options do not align with the primary function of the first stage of a sequencer. Deactivating the heater or monitoring temperature would not typically be the first action needed for effective heating, nor is controlling airflow managed by the sequencer's first stage. These functions are essential at different points in the operation of the heating system but do not initiate the heating process.