ComfortVu™ BACnet Thermostat Model Standard TB-HM (Line voltage)Carrier Proprietary and Confidential CARRIER CORPORATION ©2020
Installation and Operation Guide All rights reserved
38
Wiring and DIP Switch configuration 39 – FC systems - 4-pipe
Config. 39:
4-Pipe,
1/2/3 Speeds fan
(1)
,
Heat valve PID, Cool
valve PID
Fan medium
(or Economizer
(5)
)
Heat element
(2)
(2nd stage heat)
Heat valve PID
(1st stage heat)
(1)
SW3.1, SW3.2 = Fan speeds: 1 Speed (Low): SW3.1 ON, SW3.2 OFF
2 Speeds (Low and High): SW3.1 OFF, SW3.2 ON
3 Speeds (Low, Medium and High): SW3.1 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 – Economizer
OFF – Fan Med. (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.
PID valves: 0-10VDC, 0.5mA Not isolated
Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.