The TB8220U Commercial VisionPRO™ Programmable Thermostat provides electronic control of 24 Vac heating and cooling systems. It can be powered by batteries or directly connected to a 24 Vac transformer.
The TB8220U Commercial VisionPRO™ Programmable Thermostat provides electronic control for 24 Vac heating and cooling systems. It supports conventional and heat‑pump system types, offers optional battery backup, and includes mercury‑safety notices.
The manual covers installation steps, wall‑plate mounting, wiring diagrams for single‑ and dual‑transformer setups, power options, calendar and time setting, sensor wiring, specifications, accessories, and a troubleshooting guide.
| Heating Voltage | 20‑30 Vac |
|---|---|
| Cooling Voltage | 20‑30 Vac |
| Fan Voltage | 20‑30 Vac |
| Economizer/TOD Voltage | 20‑30 Vac |
| Heating Temperature Setting Range | 40°F to 90°F (4.5°C to 32°C) |
| Cooling Temperature Setting Range | 50°F to 99°F (10°C to 37°C) |
| Operating Ambient Temperature | 0°F to 120°F (-18°C to 49°C) |
| Shipping Temperature | -30°F to 150°F (-34.4°C to 65.6°C) |
| Operating Relative Humidity (Non‑condensing) | 5% to 90% |
| Thermostat Dimensions | 3‑3/4 in. high x 6 in. wide x 1‑3/8 in. deep |
Heating can be set from 40 °F to 90 °F, and cooling from 50 °F to 99 °F.