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Determine Wiring Configuration
If the ST920WF Thermostat is being installed in a new system or if wiring
changes are intended, refer to Appendix A for the wiring configurations and
skip to Install Mounting Plate.
When replacing a thermostat and replicating the wiring of the existing
thermostat is desired on the ST920WF the following applies.
• Remove the old thermostat to expose the wiring terminals
• Photograph the wiring for reference or use the table below to note
the wire colors.
• Use the Wire Color Record to note the wire color and function of each
wire. If the terminals of the existing thermostat are unmarked,
determine the wire functions for each color wire at the appliance.
3
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