Installation Manual
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Default is 4.
SW17 —Time Between Equipment Stages
This selection is only available for heat pump systems. This determines the minimum number of
minutes of equipment operation on the highest compressor stage before allowing the transition to
auxiliary heat. Available selections are 10, 15, 20, and 25. The time between stages of any
individual piece of equipment, such as low speed and high speed compressor or fan coil stages,
will be fixed at 10 minutes.
Default is 15.
SW18 – not used
SW19 —Dry Contact Configuration (With optional Two-Wire Relay Module)
There are 3 available selections, OFF, 1 and 2.
OFF — The dry contact is always de--energized.
VENT — The dry contact will be energized for the specified number of minutes per hour. This
selection is programmable by period. When this selection is changed from OFF to VENT,
Ventilation will be available in the homeowners menu under schedule (from the home screen tap
menu, select when schedule is blinking then the up/dn arrow to ventilation). Wake will be shown
above the min/hr. the up/dn arrow will adjust min/hr between 0 and 60. Press Next to move
through the four periods and set the times per period. See Operational Information and Wiring
Diagrams for further explanation of dry contact configuration and use in the Two-Wire Relay
Module installation instructions.
DEHUM — The dry contact will operate as a DH relay. This relay is reverse logic. When the
humidity level is above the dehumidify setpoint, the dry contact D1--D2 will be opened. When
the humidity level is below the dehumidify setpoint, D1--D2 will be closed. There is a +/- 2%
hysteresis around the dehumidify setpoint to prevent rapid on/off cycling of the DH output.
When configured for dehumidification, the Rc terminal must be connected to one of the dry
contact terminals. This provides power to energize the dehumidify terminal on the cooling
equipment when the dry contact is closed. See Wiring Diagrams for more information.
Default is OFF
SW20 —Outdoor Air Temperature Offset Adjustment
This selection allows the calibration, or deliberate miscalibration of the outdoor air temperature
sensor reading. The selection ranges from -5 to +5F.
Default is 0.
SW22 —High Cool Latch Temperature