Owner's Manual
Page 2
... furnaces, heat pumps, steam, gravity • Heat only • Heat only with fan (T87N) • Heat only, 2-wire, and 3-wire hot-water valve (power open and close valves) (T87K) • Cool only (T87N) Fan Settings (T87N) • Auto, On Specifications Temperature Range • 40° to ... (T87N) • Heat, Off, Cool Electrical Ratings • Voltage: 20-30 VAC • Running current: 0.02-1.0A Installation tips Install the thermostat about 5 feet (1.5 m) above the floor in corners • Hot or cold air from ducts • Sunlight or radiant heat from appliances •...
... furnaces, heat pumps, steam, gravity • Heat only • Heat only with fan (T87N) • Heat only, 2-wire, and 3-wire hot-water valve (power open and close valves) (T87K) • Cool only (T87N) Fan Settings (T87N) • Auto, On Specifications Temperature Range • 40° to ... (T87N) • Heat, Off, Cool Electrical Ratings • Voltage: 20-30 VAC • Running current: 0.02-1.0A Installation tips Install the thermostat about 5 feet (1.5 m) above the floor in corners • Hot or cold air from ducts • Sunlight or radiant heat from appliances •...
Owner's Manual
Page 3
.... Terminal Designations-T87K W Heat relay. Wiring 1. B Heat pump changeover valve energized in place between R & Rc. Loosen screw terminals, insert wires into the wall opening with nonflammable insulation to connect terminals W and Y. R Heating power. Plug the wall opening . 3. G Fan relay. Connect to secondary side of wire (not supplied) to prevent drafts from affecting thermostat operation. Position...
.... Terminal Designations-T87K W Heat relay. Wiring 1. B Heat pump changeover valve energized in place between R & Rc. Loosen screw terminals, insert wires into the wall opening with nonflammable insulation to connect terminals W and Y. R Heating power. Plug the wall opening . 3. G Fan relay. Connect to secondary side of wire (not supplied) to prevent drafts from affecting thermostat operation. Position...
Owner's Manual
Page 4
...warm air (9 CPH) On Switch 2 On On Off Off Align the slots on the base with tabs on the thermostat, then push gently until the thermostat snaps into place. T87N/T87K • Owner's Manual Fan operation settings (T87N) Fan operation settings: F: For gas or oil heating systems, ...leave the fan operation switch in this setting for heat pump or electric heat systems. (This setting is for systems that allow the thermostat to control the fan in a call for heat, if a fan wire...
...warm air (9 CPH) On Switch 2 On On Off Off Align the slots on the base with tabs on the thermostat, then push gently until the thermostat snaps into place. T87N/T87K • Owner's Manual Fan operation settings (T87N) Fan operation settings: F: For gas or oil heating systems, ...leave the fan operation switch in this setting for heat pump or electric heat systems. (This setting is for systems that allow the thermostat to control the fan in a call for heat, if a fan wire...