Owner's Manual
Page 1
Introduction The RTH1120 non-programmable thermostat can be removed in a 5-wire installation. n Remove the old thermostat to control: • a gas, fuel oil or electric furnace - 2 or 3 wires • a central air conditioner - 2 or 3 wires • a hot water system... behind doors), direct sunlight or areas near concealed pipes or chimneys. r Pass the wires through the opening of these wires with the thermostat terminals. RTH1120 69-1875EF-1 29/11/06 1/4 System operating mode selector Fan operating mode selector Features • System operating mode selection: heat, cool...
Introduction The RTH1120 non-programmable thermostat can be removed in a 5-wire installation. n Remove the old thermostat to control: • a gas, fuel oil or electric furnace - 2 or 3 wires • a central air conditioner - 2 or 3 wires • a hot water system... behind doors), direct sunlight or areas near concealed pipes or chimneys. r Pass the wires through the opening of these wires with the thermostat terminals. RTH1120 69-1875EF-1 29/11/06 1/4 System operating mode selector Fan operating mode selector Features • System operating mode selection: heat, cool...
Owner's Manual
Page 2
... the jumper to the system. You will be higher than the ambient temperature if you hold the thermostat in your hands. After the batteries are installed, mount the thermostat on the wall. RTH1120 69-1875EF-1 29/11/06 2/4 2.3.1 2-wire Heating 2.3.2 2-wire Cooling Heat relay 2.3.3 3-wire... the faceplate. p Reinstall the battery cover. It is installed on the baseplate. It will display the ambient temperature after the thermostat is normal that the displayed temperature will hear a clicking sound. p Apply power back to this position if you have an electric...
... the jumper to the system. You will be higher than the ambient temperature if you hold the thermostat in your hands. After the batteries are installed, mount the thermostat on the wall. RTH1120 69-1875EF-1 29/11/06 2/4 2.3.1 2-wire Heating 2.3.2 2-wire Cooling Heat relay 2.3.3 3-wire... the faceplate. p Reinstall the battery cover. It is installed on the baseplate. It will display the ambient temperature after the thermostat is normal that the displayed temperature will hear a clicking sound. p Apply power back to this position if you have an electric...
Owner's Manual
Page 3
... need to wait up to the heating/cooling unit. This is a safety feature for 3 seconds. 3. x 3 in . (127 mm x 75 mm x 28 mm) RTH1120 69-1875EF-1 29/11/06 3/4 The icon disappears once the batteries are as follows: 2=30 min (steam or gravity), 3=20 min (hot water or 90...%+ high-efficiency furnace), 4=15 min (gas or oil), 5=12 min (alternate setting for 120 days, then the thermostat will change 3.4 Setting the Temperature Press one of the buttons is displayed, use the system mode selector switch to 50°C) Temperature display resolution: 1°...
... need to wait up to the heating/cooling unit. This is a safety feature for 3 seconds. 3. x 3 in . (127 mm x 75 mm x 28 mm) RTH1120 69-1875EF-1 29/11/06 3/4 The icon disappears once the batteries are as follows: 2=30 min (steam or gravity), 3=20 min (hot water or 90...%+ high-efficiency furnace), 4=15 min (gas or oil), 5=12 min (alternate setting for 120 days, then the thermostat will change 3.4 Setting the Temperature Press one of the buttons is displayed, use the system mode selector switch to 50°C) Temperature display resolution: 1°...
Owner's Manual
Page 4
If the product is defective, (i) return it, with a bill of your thermostat, please go to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell's option). HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES ...This warranty shall not apply if it , or (ii) call 1-800-468-1502. RTH1120 69-1875EF-1 29/11/06 4/4 Customer Care will make the determination whether the product should be returned to the following address: Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr N, Golden Valley, MN 55422,...
If the product is defective, (i) return it, with a bill of your thermostat, please go to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell's option). HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES ...This warranty shall not apply if it , or (ii) call 1-800-468-1502. RTH1120 69-1875EF-1 29/11/06 4/4 Customer Care will make the determination whether the product should be returned to the following address: Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr N, Golden Valley, MN 55422,...