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5b  Wire two-stage heat, single-stage cooling
1. Do not disconnect the W2 wire from your heating/cooling system.
2.  Disconnect the R wire from your heating/cooling system’s terminal block.
3.  Connect the R wire to the Rc terminal on the THERMOSTAT end of the wire saver.
4.  Disconnect the W wire from the heating/cooling system; connect it to W on the    
  THERMOSTAT end of the wire saver.
5.  Disconnect the G wire; connect it to K on the THERMOSTAT end of the wire saver.
6.  Disconnect the Y wire; connect it to C on the THERMOSTAT end of the wire saver.
7.  Connect stripped ends of the included wire bundle to the terminals labeled EQUIPMENT 
  on the  wire saver in this color order:
  a.  Connect red to Rc
  b.  Connect yellow to Y
  c.  Connect green to G
  d.  Connect blue to C
  e.  Connect white to W
8.  Connect the other set of stripped ends to the terminals on your heating/cooling system  
  following the same color order.