Venstar T2800 Installation - Manual (Page 10)

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3
DEHUM JUMPER SETTING
Explanation of Jumper Settings
(continued)
If the jumper for MISC1, MISC2, or MISC3 is set to DEHUM,
terminal on the backplate will be connected to the dehumidification terminal of a furnace
board.
NOTE: Not all furnaces have a dehumidification terminal. the corresponding MISC screw
DEHUMIDIFICATION OPERATION - SECTION 10 of the Owner’s Manual
If your HVAC unit is equipped with a dehumidification system the thermostat will
operate in one of two ways.
1) Normally Closed (NC): The thermostat will de-energize the MISC1, MISC2,
or MISC3 terminal of the thermostat (this MISC terminal is connected to the
DEHUM terminal on your furnace) to allow the fan to run in low speed when
the humidity in the home is above the dehumidify setpoint you have chosen
and there is a call for 1st stage cooling.
2) Normally Open (NO): The thermostat will energize the MISC1, MISC2, or
MISC3 terminal of the thermostat (this MISC terminal is connected to the
DEHUM terminal on your furnace) to allow the fan to run in low speed when
the humidity in the home is above the dehumidify setpoint you have chosen
and there is a call for 1st stage cooling.