Trane Baysens019c Manual Jun 2026

Liquid Crystal Display (LCD) with digital readout.

Retains programming in permanent memory during power interruptions, though the clock may need resetting after long outages. Installation & Troubleshooting

If the building is occupied during a scheduled "Unoccupied" period, press the button.

is a communicating sensor, meaning it does not just act as a standard thermostat; it talks directly to the ReliaTel HVAC unit controller. It features a digital display showing time, temperature, and system status. trane baysens019c manual

The BAYSENS019C functions as a digital command center for your HVAC system. It interfaces directly with Trane's proprietary ReliaTel and Voyager control boards, allowing users to set schedules, monitor system status, and manage temperature setpoints. Key Specifications:

Total loss of 24 VAC power from the unit. Check the transformer fuse or circuit breaker at the rooftop unit. 6. Maintenance and Troubleshooting Common Issues and Solutions Probable Cause Corrective Action Screen is completely blank No 24VAC power; blown fuse on ReliaTel board.

This override remains active until the next scheduled period begins. Manual Occupied Override Liquid Crystal Display (LCD) with digital readout

If the power has been interrupted for an extended period, you may need to reset only the clock and day—the program remains stored in permanent memory.

This is possible but requires careful reconfiguration. The BAYSENS019C uses terminals 7 through 14 for serial communication. However, the ReliaTel control board on the rooftop unit also includes standard R, W, Y, G terminals that are unused when a zone sensor is installed. Qualified technicians have successfully replaced the PZS with conventional 24 VAC thermostats by rewiring to these standard terminals. This is a simple drop‑in replacement—it requires understanding of the specific unit's control board and may necessitate additional interface hardware depending on the unit model.

If you change the temperature, press the HOLDTEMP button within 20 seconds to make the change permanent until the next scheduled period. Programming Schedule is a communicating sensor, meaning it does not

For more complex issues, the Trane Baysens019c manual provides advanced troubleshooting guides, including:

Use the to adjust the current hour and minute (ensure AM/PM is correct). Press Day to cycle through to the current day of the week. Press Done or Run Program to save. Creating a 7-Day Schedule

It works, but the manual’s troubleshooting section is filled with “repeat steps 1-5” notes. Compared to modern Bluetooth or NFC pairing, this feels like 2010 technology.

This often indicates a defective outside air sensor or an open emergency shutdown input.