Dual Fuel Heat Pump Wiring
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Heat pump system, l wire connection. Heat pump, dual fuel, geothermal; Sensi thermostat is not compatible with line voltage systems. A line voltage thermostat will typically have wires larger than 18 gauge and may not have terminal labels.
Connect the red wire to the "r" terminal of the thermostat; The brown wire to the "w2" terminal; The black wire to the "c" terminal; The yellow wire to the "y" terminal; The green wire to the "g" terminal; And the white wire to the "w" terminal. The black line, on the other hand, is the hot wire and goes into the hot terminal, the one opposite the neutral terminal. Wiring a pelican thermostat to a heat pump unit with dual fuel: Wire your pelican thermostat to enable the first compressor with (y), the second compressor with (y2), the fan with (g), the reversing valve with (w), and the secondary heating source with the (w2).