Note: This article is for informational purposes. Always follow local electrical codes and the official Trane manual when installing or servicing HVAC equipment.
He looked back at the Trane sensor. The number was climbing.
7-day scheduling with 2, 3, or 4 distinct periods per day (Occupied/Unoccupied).
| Feature | BAYSENS019C | BAYSENS019D | ZS Standard | | :--- | :--- | :--- | :--- | | | 10K Thermistor / Analog | 10K Thermistor | BACnet MS/TP or LonTalk | | Display | Monochrome LCD | Monochrome LCD with backlight | Full graphical LCD | | Dip Switches | Yes (4-8 position) | Yes (simplified) | No (software configurable) | | Manual Availability | Hard to find (legacy) | Easy (still supported) | Very easy (current model) |
The LCD shows the current room temperature by default. If "Service" or "Err" flashes, see Part 7 below.
Do not apply 24V to the TEMP or OCC terminals. Doing so will fry the thermistor and circuit board. Always verify power (R to COM) is 18-30 VAC, not VDC.
: Installation and service should only be performed by qualified personnel due to risks of electrical shock or equipment damage. The Star Supply Company Troubleshooting : Indicates a communication failure
– Best for listing electrical ratings, temperature range (e.g., 32°F to 120°F), dimensions, wiring diagrams (shielded 18–22 AWG), and compatibility with Trane zone sensor modules or communicating thermostats.
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