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Details field-adjustable and fixed delay settings for heat and cool fan operation.
Highlights critical warnings, especially electrical shock hazards during installation.
Explains how to set DIP switches for heat fan-on and fan-off delay timing.
Illustrates typical wiring connections for the ST9120U with an S8600 ignition module.
Shows typical wiring for the ST9120U with SV9500/SV9501 SmartValve™ system controls.
Shows the internal schematic of the ST9120U for intermittent pilot applications.
Guides the user through verifying system operation after installation.
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