ComfortVu™ BACnet Thermostat Model Standard TB-HM (Line voltage)Carrier Proprietary and Confidential CARRIER CORPORATION ©2020Installation and Operation Guide All rights reserved28Wiring and DIP Switch configurations – AC systems 1 to 4OutputsConfig. 1:HC321 Speed fanConfig. 2:HP421 Speed fanConfig. 3:HP222/3 Speeds fanConfig. 4:HP212/3 Speeds fan(1)11 Heat element 3(3rd stage heat)Heat element 2(4th stage heat) Fan high Fan high12 Heat element 2(2nd stage heat)Heat element 1(3rd stage heat)Fan medium(or Economizer(5))Fan medium(or Economizer(5))13 Fan (1 speed) Fan (1 speed) Fan low Fan low14 Compressor 2(3) Compressor 2(3) Compressor 2(3) Heat element(2nd stage heat)15 Compressor 1(3) Compressor 1(3) Compressor 1(3) Compressor(3)16 Heat element 1(2)(1st stage heat) Heat pump(2) Heat pump(2) Heat pump(2)SW3SW1AO1 X X X XAO2 X X X X(1) SW3.1, SW3.2 – Fan speeds: 2 speeds (Low and High):3 speeds (Low, Med., and High):SW3.1 = OFF, SW3.2 = ONSW3.1 = OFF, SW3.2 = OFF(2) SW3.4 – HP (Heat pump):HC (not heat pump):ON = Heat pump active in cool, OFF = Heat pump active in heatON = Electrical heater, OFF = Oil/Gas heater (no fan)(3) SW3.5 – Compressor delay: ON = Disable, OFF = Enable(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 (2 speeds)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.Control - Heat elements, Heat pump, Compressors, Economizer: 110-230VAC, 0.3A max.
