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  Unplug the cable from the CO2 module to the adapter board. Then unscrew the two 
M3×6 screws to take out the adapter board. 
 
  Unscrew the four M3×6 screws to take out the microstream CO2 module. 
 
3.  To take out the mainstream CO2 assembly: 
  Use a sharp nose plier to spin the mainstream CO2 cable root clockwise until the ribs 
are exposed. Then pull out the cable.