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energizes. Y1 de-energizes at set point. O or B is energized for the reversing valve circuit,
depending on configuration. The G circuit is energized for fan.
HEAT – DIGICOM
: The thermostat will make a W1 heat call when the space temperature is 1
degree below the heat set point. W2 will energize when the space temperature is 2 degrees below
the heat set point. When the room temperature rises to within 2 degrees of the heat set point, W2
de-energizes. W1 de-energizes at set point.
NOTE: The “G” fan circuit on the DIGICOM thermostat is not energized in the Heat mode unless
the fan is set for ON operation.
HEAT − DIGIHP
: The thermostat will make a Y1 heat call when the space temperature is 1 degree
below the heat set point. Y2 will energize when the space temperature is 2 degrees below the heat
set point. E (aux heat) will energize when the space temperature is 3 degrees below set point.
When the room temperature rises to within 2 degrees of the heat set point, E (aux heat) de-
energizes. When the room temperature rises to within 1 degree , Y2 de-energizes. Y1 de-
energizes at set point.
Emergency Heat – DIGIHP
: When Emergency Heat is selected on the DIGIHP thermostat on a
call for heat, there is an output signal on “E” for backup heat and “G” for the fan. The compressor
circuits “Y1” and “Y2” are locked out during heat calls until Auto, Heat or Cool mode is selected.
The thermostat display will indicate when Emergency Heat has been selected.
DIGICOM – FAN
operation for electric heat applications: A pilot relay may be required to energize
the fan for heat operation on electric heat applications. This relay is a 24vac coil – SPST and is
field supplied. The coil is energized from W1 and C from the
DIGICOM
thermostat terminal base.
VOLTAGE POLARITY CHECK ON DIGICOM / DIGIHP
