TH1110DV1009

The brochure linked on this page lists TH1110DV1009 as a PRO 1000 vertical non-programmable thermostat for 1 Heat/1 Cool. That brochure describes Honeywell Home PRO 1000 non-programmable thermostats by Resideo for multi-family housing and apartments, and it calls out dual power from a battery and/or hardwire, a clear backlit digital display, and a 2-year warranty.

The installation guide covers the TH1110DV for 1 Heat/1 Cool systems. System types listed for the TH2110DV/TH1110DV pair include gas, oil, or electric heat with air conditioning; warm air, hot water, high-efficiency furnaces, 1 Heat/1 Cool heat pumps, steam, and gravity; heat only; heat only with fan; cool only; and 750 mV heating systems. Terminals shown for this pair are B, O, G, Y, W, C, R, and Rc. The guide says to use 18- to 22-gauge thermostat wire and that shielded cable is not required. It describes the C terminal as an optional 24 Vac common. The fan-operation switch for these models has a factory gas-or-oil position and an electric or heat pump position. The guide says the thermostat must be installed by a trained, experienced technician.