Honeywell T87K Owner's Manual - Page 4

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 factory-set position (for systems that control the fan in a call for heat). E: Change the switch to 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 is connected to the G terminal.) Cycle rate settings Move the cycle rate switches to the proper setting 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 pump (3 CPH) Gas or oil warm air Off (factory setting) (5 CPH) Electric 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. Thermostat