Owner's Manual
Page 2
... thermostat provides electronic control of: • 24 VAC heating systems (T87K) • 24 VAC heating and cooling systems (T87N) System Types • Gas or oil heat (T87K) • Gas, oil, or electric heat with air conditioning (T87N) • Warm air, hot water, high-efficiency furnaces, heat pumps, steam, gravity • Heat only • Heat only with fan (T87N) • Heat only, 2-wire...
... thermostat provides electronic control of: • 24 VAC heating systems (T87K) • 24 VAC heating and cooling systems (T87N) System Types • Gas or oil heat (T87K) • Gas, oil, or electric heat with air conditioning (T87N) • Warm air, hot water, high-efficiency furnaces, heat pumps, steam, gravity • Heat only • Heat only with fan (T87N) • Heat only, 2-wire...
Owner's Manual
Page 3
... to prevent drafts from affecting thermostat operation. Plug the wall opening . 3. G Fan relay. Rc Cooling power. Connect to secondary side of heating system transformer. B Heat pump changeover valve energized in place between R & Rc. Remove metal jumper if two-transformer system. Terminal Designations-T87N W Heat relay. R Heating power. Terminal Designations-T87K W Heat relay. wire hot-water valve systems (power...
... to prevent drafts from affecting thermostat operation. Plug the wall opening . 3. G Fan relay. Rc Cooling power. Connect to secondary side of heating system transformer. B Heat pump changeover valve energized in place between R & Rc. Remove metal jumper if two-transformer system. Terminal Designations-T87N W Heat relay. R Heating power. Terminal Designations-T87K W Heat relay. wire hot-water valve systems (power...
Owner's Manual
Page 4
...Thermostat 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 a call for your system (see table below). Thermostat mounting Base Heating System Switch 1 Steam or gravity (1 CPH) On High efficiency warm air Off (90%+), hot water, or heat... the thermostat, then push gently until the thermostat snaps into place. E: Change the switch to this setting for heat pump or electric heat systems. (This setting is for systems that control the fan in a call for heat, if a fan wire is ...
...Thermostat 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 a call for your system (see table below). Thermostat mounting Base Heating System Switch 1 Steam or gravity (1 CPH) On High efficiency warm air Off (90%+), hot water, or heat... the thermostat, then push gently until the thermostat snaps into place. E: Change the switch to this setting for heat pump or electric heat systems. (This setting is for systems that control the fan in a call for heat, if a fan wire is ...