The BAST-421C-B2 wired thermostat is BACnet MS/TP connected utilizing an EIA-485 serial connection. The BAST-421C-BW2 wireless thermostat is BACnet/IP connected using a wireless connection to a nearby Wi-Fi router/access point, which supports IEEE 802.11b/g/n. Both models provide modulated heating and cooling control in a wall-mounted enclosure with an LCD display that indicates setpoint, space temperature and current mode of operation using graphical icons. Intended for use with four-pipe heated/chilled water FCUs, the thermostats can control two analog modulating water valve actuators and one binary supply fan. A configurable control algorithm allows adaptability to the specific application. This adaptive control algorithm applied to modulated valve control saves energy and ensures comfort for the occupants. Three sensing options are available: built-in temperature sensor, input for remote temperature sensor, or temperature override network command from Building Automation System.
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