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On both the programmable and non−programmable models, when configured as a
dehumidify output, it will operate cooling equipment capable of dehumidify
function. When configured for dehumidification, the Rc terminal must be connected
to one of the dry contact terminals. The other dry contact terminal is connected to
the dehumidify terminal on the furnace or fan coil. This provides power to energize
the dehumidify terminal on the cooling equipment when the dry contact is closed.
If it is desired to operate a ventilator or other device, the D1 and D2 terminals can
be connected directly to the equipment. This will provide a closed contact for the
specified number of minutes per hour. See SW19.
If timed control of the system blower is required, the dry contact can be used for
this function. The G terminal can be connected to one of the dry contact terminals
with the other terminal being connected to Rc and/or Rh for timed control of the
fan. Note that this is not the same as programmable fan SW30.
See Wiring Diagrams for more information.
Temperature Offset After Power Cycle
To compensate for internal heat build−up from the electronics in the thermostat, the
thermostat will add an offset to the actual temperature that it measures. If the
thermostat power is cycled quickly, one can witness an immediate increase in the
actual temperature displayed due to this added offset. The thermostat display will
return to the actual room temperature after several minutes of operation.
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