Trane Pivot BAYSTAT814 Series, Installation, Operation And Maintenance Manual

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36 BAS-SVX078E-EN
• RH control
– Dry contacts are closed anytime the indoor humidity is less than the heating target relative
humidity.
• Frost control
– The unit references the outdoor temperature through a wired outdoor air temperature sensor
and structure integrity to offset the heating target relative humidity. This helps to limit the risk of
frost or condensation from forming on interior walls and windows. A scale of 1 to 10 is provided
based on the insulation properties and expected leakage of the building (1 = Leaky with poor
insulation and 10 = very tight with good insulation). The unit can be setup to allow
dehumidification anytime in heating mode or only when actively heating. The airflow during
humidifier-only is factory set to 100%. However, it can be adjusted between 35% and 100%,
requiring a variable speed indoor blower with BK connected. All humidifier control options are
accessed by navigating to
Installer Setup > Accessories Settings . Refer to the following
illustration.
Optimal Start/Stop
Optimal Start is an enhancement to Occupied/Unoccupied scheduling. If Scheduling is disabled on the
Pivot thermostat, Optimal Start will not be available.
Optimal Start is a strategy that calculates equipment to make the space comfortable (that is, be at its
occupied setpoints) at the occupied time. Optimal Start is a preoccupied event. When the Optimal Start
algorithm brings the equipment on, the thermostat will switch to the occupied setpoints; however, the
equipment’s OA damper remains closed. Thus, no ventilation occurs during optimal start.
The user shall be able to enable and disable Optimal Start. If Optimal Start is enabled, the user shall be
able to specify the maximum early start time in minutes. Both of these items are entered on a
configuration screen.
Optimal Stop is an enhancement to Occupied/Unoccupied scheduling. If scheduling is disabled on the
Pivot thermostat, Optimal Stop will not be available.
Optimal Stop is a control strategy that calculates how early, in minutes, the equipment can save energy
by “coasting” to its shutdown. Unlike Optimal Start, Optimal Stop is an occupied event. When Optimal
Stop begins, the thermostat switches to use the unoccupied setpoints.
The equipment will do less heating or cooling while using unoccupied setpoints and the space should
“coast” into the unoccupied mode. The equipment still must deliver Outside Air to the space until the
unoccupied time; thus, ventilation of the space continues during Optimal Stop.
The user can enable and disable Optimal Stop. If Optimal Stop is enabled, the user shall be able to
specify the maximum early stop time in minutes. Both of these items are entered on a configuration
screen.
Optimal Start and Stop can be enabled by navigating to Menu > Settings > Optimal Start/Stop .
Open Automatic Demand Response (OADR)
Users can participate in energy saving programs offered by utilities and energy aggregators using
OADR features in the thermostat. When enrolled in this program, the utility or energy aggregator will
send a signal to the thermostat which will help reduce energy consumption by automatically setting the
cooling setpoints higher or the heating setpoints lower. Typically these events last for a few hours and
Advanced Operation