7 free cooling on / off, 8 room occupied yes/no, 9 outdoor enthalpy – Bard TCS22-***-003 User Manual
Page 35: Free cooling on / off, Room occupied yes/no, Outdoor enthalpy
2100-444-003A
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Setpoint will be 70
o
the same as the fixed Dehumidification Heating Setpoint.
5.3.1.7 FREE COOLING
ON / OFF
This display item indicates whether outside conditions are suitable to allow the use of outside air
to provide free cooling inside the structure. The controller calculates the either outside temperature or
enthalpy from the Outdoor Temperature and Outdoor Humidity and compares this value with the Free
Cooling Setpoint. The Free cooling setpoint can be either a dry bulb temperature or enthalpy. This is
user selectable. If outdoor temperature or enthalpy, whichever the user has selected, is less than the Free
cooling setpoint then Free Cooling is ON. If the temperature or enthalpy of the outside air is more than
the Free Cooling Setpoint then Free Cooling is Off.
5.3.1.8 ROOM OCCUPIED YES/NO
This display indicates the status of the After-hours Occupancy Override Button. If the display
shows "NO", the controller is in the unoccupied mode and the unoccupied setpoints prevail. If the
display shows "YES", the controller is in the occupied mode and the occupied setpoints prevail.
Depressing the Occupancy Override Switch on the Zone Temperature Sensor for one second triggers the
Occupied mode for two (2) hours.
5.3.1.9 OUTDOOR ENTHALPY
This outdoor enthalpy displays the calculated outdoor air enthalpy. The outdoor enthalpy is
calculated from the outdoor temperature and outdoor humidity sensors and is used to determine wether
the air is suitable for free cooling or not.