What must be carefully considered when converting from "D" model to "SJ" model Robertshaw thermostats?

When converting from "D" model to "SJ" model Robertshaw thermostats, the wiring differences are a critical factor to consider. Each model may have different pin assignments, wire colors, or terminal functions, which can complicate the installation process. Ensuring that the correct wiring is utilized is essential for the thermostats to function properly, as incorrect wiring can lead to malfunctions or even equipment damage.

Understanding these wiring variations allows technicians to effectively and safely switch from one model to another. It highlights the necessity of referring to technical documentation or wiring diagrams specific to each model before attempting the conversion, ensuring accurate connections and system integrity.