T158 & T168 Series Proportional Thermostats T158 and T168 digital thermostats are standalone controllers for 0-10 VDC, Three Wire Floating or ON/OFF valves, damper and relays. T158 controls 24 VAC output On /Off for valves, dampers, relays and three-wire floating valves. T168 proportional thermostat delivers 0-10 VDC or 4-20 mA output for proportional control of valves and dampers. With a digital display and easy-to-use buttons, it delivers easy access to temperature, set-points and operating mode. Both operate at 50 Hz / 60 Hz, have multi-speed fan switching model available and provide functionality for Summer/Winter fan coil changeover. Models TA158-100: Auto-Heat-Cool-Off, Off-H-Med-Lo Fan, On/Off valves. TB158-100: Auto-Heat-Cool-Off, Off-Hi-Med-Lo Fan, 3-wire or On/Off valves. TA168-100: 0-10 VDC/4-20 mA, 2/4 pipe, Auto-Heat-Cool-Off, Off-H-Med-Lo Fan.
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