52COMMON TERMS AND WHERE TO FIND THEMDehumidify page 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .When your heating and cooling system is used to dehumidify the air and thethermostat is set up to dehumidify, the thermostat will instruct it to remove moisturefrom the air as necessary when the air conditioning is on.Emergency heat (heat pump and Hybrid Heatsystems only) page 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .You can manually set the thermostat to use emergency heat but it is the mostexpensive option. If it’s using emergency heat, the display will show Em heat.EXP (Edge Expansion Port) page 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .The unique EXP – Edge Expansion Port – allows you to use a digital memory cardto program the thermostat on your computer.Hold page 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .This function holds the current set temperature.Hybrid Heat (heat pump with a furnace system only) page 47. . . . . . . .This Carrier heating and cooling system concept offers maximum comfort andeconomy. When a Hybrid Heat system is installed, the thermostat automaticallycontrols whether your system delivers heating with the heat pump, with the furnace,or with both options working together.