This document is the installation guide for the TH6110D programmable thermostat, which provides information on the system types, power options, changeover options, system settings, and fan settings. It must be installed by a trained and experienced technician.
This guide is intended for trained technicians who install the Honeywell FocusPRO TH6110D programmable thermostat. It covers safety warnings, required tools, pre‑installation checklist, wallplate mounting, wiring, and system configuration.
Key sections include a quick reference to controls, detailed wiring diagrams for various heating and cooling system types, power and changeover options, system and fan settings, and a troubleshooting appendix. The document also lists specifications, accessories, and part numbers for replacement components.
| Heat temperature range | 40°F to 90°F (4.5°C to 32°C) |
|---|---|
| Cooling voltage rating | 20‑30 Vac |
| Heating voltage rating | 20‑30 Vac |
| Physical dimensions | 3‑9/16" H x 5‑13/16" W x 1‑1/2" D (91 mm × 147 mm × 38 mm) |
| Operating relative humidity | 5% to 90% (non‑condensing) |
Use 18‑ to 22‑gauge thermostat wire; shielded cable is not required.