BASstat Series BACnet Thermostats

BASautomation

Thermostats in the series are designed for BACnet/IP over Wi-Fi or MS/TP multi-stage rooftop unit and analog 4-pipe fan coil units. The BACnet-compliant wired or wireless communicating thermostats ensure effortless integration into BACnet/IP (Wi-Fi) or BACnet MS/TP (EIA-485) networks. All units require 24 VAC/VDC powering from NEC Class 2 power sources. Output relays restricted to NEC Class 2 wiring. All models accommodate NTC 3k remote temperature sensor and voltage-free occupancy sensor. LCD display can be configured for °C or °F.

Model/Description Analog and Binary Inputs Binary Outputs Analog Outputs Comm
Space Temp Remote Temp Energy Savings Humid Sensor Stage 1 Heating Stage 2 Heating Stage 1 Cooling Stage 2 Cooling 1-Speed Fan Analog Heating Analog Cooling
BAST-221C-B2
BACnet MS/TP Thermostat 2-Heat, 2-Cool, 1-Fan, Wired
X X X   X X X X X     MS/TP
BAST-221C-BW2
BACnet/IP Thermostat 2-Heat, 2-Cool, 1-Fan, Wi-Fi
X X X   X X X X X     Wi-Fi
BAST-221CH-B2
BACnet MS/TP Thermostat 2-Heat, 2-Cool, 1-Fan, RH, Wired
X X X X X X X X X     MS/TP
BAST-221CH-BW2
BACnet/IP Thermostat 2-Heat, 2-Cool, 1-Fan, RH, Wi-Fi
X X X X X X X X X     Wi-Fi
BAST-421C-B2
BACnet MS/TP FCU 4-pipe, single-speed Fan, Wired
X X X           X 0-10V 0-10V MS/TP
BAST-421C-BW2
BACnet/IP FCU 4-pipe, single-speed Fan, Wi-Fi
X X X           X 0-10V 0-10V Wi-Fi

Fan coil units are intended for 4-pipe systems and modulating 0-10V actuators.


BAST-221 Thermostats

BAST-221 Thermostats are suited for single or multi-stage heating, cooling and ventilation binary output control applications such as RTU or AHU. Configurable control algorithm parameters allow adaptability to the specific application. Adaptive control algorithm applied to multi-stage on/off control saves energy and ensures seamless comfort for the occupants. Three sensing options are available: built in temperature sensor, input for a remote temperature sensor, or temperature override network command from Building Automation System. A built-in relative humidity sensor (in 221CH models) allows the thermostat to display relative humidity on the screen as well as serve it as a BACnet object, dew point calculation is also served as a BACnet object (no control action is taken based on humidity). Occupancy status can be set from thermostat buttons or over the BACnet network. Thermostat buttons are optionally lockable to prevent unauthorized control or configuration changes. Digital display with graphical icons is easy to read and understand.

BAST-421 Modulating Thermostats

These thermostats are suited for modulated heating, cooling, and ventilation with analog output control in 4-pipe applications such as fan coil units (FCU) or air handlers. A configurable control algorithm allows adaptability to the specific application. This adaptive algorithm applied to the 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. Occupancy status can be set from thermostat buttons, a wired ESI input, or over the BACnet network. Thermostat buttons are optionally lockable to prevent unauthorized control or configuration changes. Digital display with graphical icons is easy to read and understand.