In what configuration are thermostat heat anticipators typically connected?

Thermostat heat anticipators are typically connected in series with the valve and the thermostat contacts to ensure accurate temperature control within a heating system. This configuration allows the anticipator to monitor the current flowing through the circuit more effectively, providing a means to adjust the operation of the heating system based on the temperature setting.

By being in series, the anticipator can influence the timing of when the heat should be turned on or off, allowing it to "anticipate" the need for heat based on the thermostat's settings. This prevents the system from overshooting the desired temperature, leading to more efficient temperature regulation and improved comfort levels in the conditioned space.

Connecting the anticipator in parallel with the main burner, only with the main gas line, or in isolation from all other components would not allow for proper coordination with the thermostat's operation, which is essential for maintaining steady and efficient heating.