2018 Lennox Industries Inc. Dallas, Texas, USA THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE INSTALLATION. Page 5 L3011C/L3021H THERMOSTATS Wiring Diagrams Typical wiring diagrams for the thermostats are shown in figure 3 for the L3011C and figure 4 (Page 6) for the L3021H... for thermostat wiring Figure 2. Level Wall Plate c. Cut or drill a small hole approximately 3/4" x 3/4" for wiring. d. Pull about three inches of all wiring through opening and remove outer communication wire jacket. e. Trim 1/4" insulation from end of each wire. f. Drill 3/16" holes at marked locations on wall for wall anchors.
center openings on wall plate (use is optional) Replacement Installation and back plate. Use the following two steps to replace an existing thermostat. Wall Plate (optional) 1. Remove existing thermostat. 2. Note the wire colors and what terminals they are Thermostat connected for future reference. Page 7: Thermostat Terminal Information. 1 iComfort S30 ultra smart thermostat includes a smart hub and HD Display 4 Mounting screws (#6 X 1.25" pan head) 4 Wall anchors (alligator flanged solid wall anchors). The following diagrams in this section illustrates the basic Lennox control wiring for all compatible components. Discharge Air Temperature Sensor (DATS) The optional.