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Advanced Operation
1. Enable Ventilation and select an AUX output.
2. select whether you want the occupancy signal output relay to be open when occupied or closed
3. Set the Minimum Ventilation Runtime to 60 minutes per hour. When set up this way, the Ventilation
Refer to figure 5 in the Wiring section for an example of a typical Trane installation.
Warm Air Discharge
Enabling warm air discharge with BK connected reduces the variable speed blower airflow by 20%
when in compressor heating operation. Warm air discharge only applies to compressor heating and is
disabled when hydronic, fossil fuels, or electric heat (that includes supplemental heat) modes are
activated. Warm air discharge is accessed by Installer Setup>Comfort Settings.
Wet Heat (Hydronic) Operation
A hot water coil can be applied to either a variable speed or non-variable speed indoor unit. The hot
water coil can be the sole source of heat or used as auxiliary heat when applied with a heat pump.
When applied with a heat pump, wet heat is considered auxiliary heat and operates in conjunction with
heat pump heat. Switching the system mode to emergency heat would disable the heat pump and cycle
the wet heat only.
If applied with a variable speed air handler with BK connected, the blower speed during wet heat only,
varies based on the system load value. The airflow ranges from 35% to 100%, depending on the system
load value. When applied with a heat pump, the blower speed during heat pump and wet heat operation
is the higher of the two airflows. There are separate blower On/Off delays for wet heat on the unit.
The unit is designed to operate a forced air system and should not be applied to non-forced air systems,
such as radiant floors, radiator, and so forth). The hydronic heat blower delay options are accessed by
navigating to Installer Setup > Airflow Settings.
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when occupied.
Aux output will be on during occupied periods, and off during unoccupied periods, and therefore will
act as an occupancy output signal,
BAS-SVX078E-EN
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