Describes the basic functions and features of the TH5110D non-programmable thermostat, including power supply methods, system types, switching methods, system settings, fan settings, etc.
This guide provides step‑by‑step instructions for installing the Honeywell TH5110D non‑programmable thermostat. It includes safety warnings, location selection, wall‑plate mounting, wiring diagrams for various system types, and power‑supply options.
The document also details the Installer Setup menu, troubleshooting procedures for common symptoms, and the thermostat’s electrical and environmental specifications. It is intended for trained service technicians who will configure the thermostat to match the heating and cooling equipment in a building.
| Powering Methods | Battery only, 24 Vac common wire only, 24 Vac common wire with battery backup |
|---|---|
| Electrical Ratings – Heating (20‑30 Vac) | .02‑1.0 A |
| Electrical Ratings – Cooling (20‑30 Vac) | .02‑1.0 A |
| Temperature Setting Range – Heating | 40 °F to 90 °F (4.5 °C to 32 °C) |
| Temperature Setting Range – Cooling | 50 °F to 99 °F (10 °C to 37 °C) |
| Operating Ambient Temperature | 37 °F to 102 °F (2.8 °C to 38.9 °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 | 3‑7/16 in (86 mm) high × 4‑1/2 in (114 mm) wide × 1‑5/16 in (33 mm) deep |
It can be powered by batteries only (AAA alkaline), by a 24 Vac common wire only, or by a 24 Vac common wire with battery backup.
Check that the thermostat is receiving power—verify 24 Vac between Re and C and ensure fresh AAA alkaline batteries are installed.
Use 18‑22 gauge thermostat wire; shielded cable is not required.
Heating can be set from 40 °F to 90 °F (4.5 °C to 32 °C) and cooling from 50 °F to 99 °F (10 °C to 37 °C).