Daikin BACnet IM 1234-1 Installation And Maintenance Manual page 37

Fan Coil Unit – Two-Pipe with Modulating Fan and ON/OFF Valve
• The water temperature sensor (WST) is required for two-
pipe units.
• Fan status switch (FST) and discharge air temperature
sensor (DAT) are optional. They are typically used only
when the BACnet Thermostat is connected to a network.
• The remote temperature sensor (RS) is optional.
• Valves are 24 Volt AC.
• Fan start output (FAN-L) is for a 24 volt AC pilot duty
input.
• Fan speed output (AO8) is 0-10 volts DC.
• For additional details on connecting sensors, see
Connecting Inputs on page
• For additional details on connecting the fan and valves,
see Connecting Outputs on page
Figure 21: Fan Coil Unit Wiring Details—Two-Pipe with Modulating Fan and ON/OFF Valve
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