![]() This switch controls the heating system fan delay. Locate the internal fan option switch, HG (Gas) / HE (Elec) on the circuit board. Using your fingers, flip the switch toward the preferred temperature ˚F / ˚C scale. Locate the internal ˚F /˚ C switch on the circuit board. Turn the front thermostat body over, exposing the rear view of the circuit board. Make sure all of the wire connections are secure and not touching any other terminal to prevent electrical shorts and potential damage to the thermostat. Connect wires to quick wiring terminal block using the new terminal designations. Fasten sub-base to wall using supplied screws. Place the thermostat sub-base against the wall in the desired location, making sure the mounting holes are aligned and the thermostat wires are inserted into the opening in sub-base. Gently tap supplied plastic anchors into the holes in the wall. Mark placement of mounting holes as appropriate and drill using a 3/16" drill bit. Guide thermostat wires through hole in sub-base. Place the thermostat sub-base against wall in the desired thermostat location. Remove front of thermostat body from sub-base by pressing release latch. Place fan control switch on front of thermostat to AUTO position. Place system switch on front of thermostat to OFF position. Turn off power to the air conditioning or heating system prior to installing thermostat. Wiring must conform to all building codes and ordinances as required by local and national code authorities having jurisdiction. Installation in these areas could impact thermostat performance. Install the thermostat in a location that provides good airflow characteristics and avoid areas behind doors, near corners, air vents, direct sunlight or heat generating devices. NOTE: If installing this thermostat in a new installation, locate the thermostat 4 to 5 feet above the floor in accordance with applicable building codes. Use the chart below to determine the new terminal designations for your new thermostat. Using small pieces of masking tape, label wires prior to removal from terminals. Remove the cover of your old thermostat and locate the wire terminals. Always turn off power to the air conditioning or heating system prior to removing existing thermostat. Terminations, Model PSTS21NP: R, O, B, C, Y1, E/W1, G, W2 1 Specifications cont.Terminations, Model PSTS11NP: Rc, Rh, B, O, Y, W, G, C. ![]()
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