COPELAND ST55 Sensi Smart Thermostat Instruction Manual

Copeland ST55 Sensi Manual: Questions and Answers

How do I set the time manually on my Copeland ST55 Sensi?

Turn Wi-Fi Off, then press and hold Schedule until the time flashes.

1. Turn Wi-Fi Off (refer to page 4).
2. Press and hold the Schedule button.
3. Use the up and down arrow buttons to rotate through times until you reach the correct time of day.
4. Press Exit. Instruction Manual, p. 6

How do I set up a schedule on my Copeland ST55 without the app?

Turn Wi-Fi Off, use Mode to select Heat or Cool, then enter four time and temperature set points.

1. Turn Wi-Fi Off (refer to page 4).
2. Use the Mode button to choose Heat or Cool.
3. Press and hold Schedule until the time flashes, adjust if needed with arrow buttons, then press Next.
4. Adjust the time of the first set point with arrow buttons, press Next, adjust the temperature set point with arrow buttons, then press Next.
5. Repeat the previous step for the second, third, and fourth set points.
6. Press Exit and set Schedule to On. Instruction Manual, p. 6

Can I use wire color to identify which terminal a wire connects to on my Copeland ST55 Sensi?

No. Wire color does not always correspond to terminal letters. A white wire may connect to W or a different terminal entirely. Take a photo of the old thermostat showing wire colors and terminal letters before removing any wires. Instruction Manual, p. 9

What's the difference between Schedule On and Schedule Off on the Copeland ST55 Sensi?

Schedule Off holds one temperature you set manually. Schedule On follows your programmed temperature settings by time of day. Instruction Manual, p. 4

What do the arrow buttons do on the thermostat?

They adjust the set point temperature. They also toggle percentage values in menu settings like fan circulation. Instruction Manual, p. 4

What does 'Temporarily Set To' mean on the Copeland ST55 Sensi display?

Your temperature has been changed from the schedule. It will return to the next scheduled set point after a minimum hold of two hours. Instruction Manual, p. 4

When should I replace batteries in my Copeland ST55?

When the battery indicator bar on the display reaches 3 bars. Two AA Alkaline batteries provide backup power. Instruction Manual, p. 10

What does the Wi-Fi status icon mean on my Copeland ST55 Sensi thermostat?

It indicates whether the thermostat is connected to Wi-Fi. The icon is blank when you turn Wireless Off on the thermostat. Instruction Manual, p. 3

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