ComfortVu™ BACnet Thermostat Model Standard TB-HM (Line voltage)Carrier Proprietary and Confidential CARRIER CORPORATION ©2020Installation and Operation Guide All rights reserved33Wiring and DIP Switches configurations 20 to 23 – FC systems - 2-pipeOutputsConfig. 20:2-Pipe, 1/2/3 Speedsfan(1)Config. 21:2-Pipe, 1/2/3 Speedsfan(1), Cool/Heat PIDConfig. 22:2-Pipe, Fan VFSConfig. 23:2-Pipe, Fan VFS,Cool/Heat PID11 Fan high Fan high X X12 Fan medium(or Economizer(5))Fan medium(or Economizer(5))Economizer(5)(option – SW1.6 ON)Economizer(5)(option – SW1.6 ON)13 Fan low Fan low X X14 Heat element(2)(2nd stage heat)Heat element(2)(2nd stage heat)Heat element(2)(2nd stage heat)Heat element(2)(2nd stage heat)15 Cool/heat valve(3) X Cool/heat valve(3) X16 X X X XAO1 X Cool/Heat valve PID(3) X Cool/Heat valve PID(3)AO2 X X Fan VFS Fan VFSSW3SW1(1) SW3.1, SW3.2 – Fan speeds: 1 speed (Low):2 speeds(Low and High):3 speeds(Low, Medium, and High):SW3.1 = ON, SW3.2 = OFFSW3.1 = OFF, SW3.2 = ONSW3.1 = OFF, SW3.2 = OFF(2) SW3.4 – 2nd heating stage: ON = Enable, OFF = Disable(3) SW3.5 – Chilled beam option: ON = Enable chilled beam (fan will not run with cooling)(4) SW1.3 = Dehumidification: ON – Use dehumidifier, OFF – Use reheat for dehumidification(5) SW1.6–Terminal 12 operation: ON = EconomizerOFF = Fan Medium (3 speeds) / Terminal not in use (1/2 speeds/VFS)Important: Economizer will not work in 3 fan speeds configuration.See drawing for DIP switch and jumper locations (page 24).Fan on/off: 110-230VAC, 2.5A max., Fan VFS, PID valves: 0-10VDC, 0.5mA Not isolatedControl - Heat elements, Cool/Heat valves, Economizer: 110-230VAC, 0.3A max.
