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ComfortVu™ BACnet Thermostat Model Standard TB-24-HM (24 Vac)Carrier Proprietary and Confidential
CARRIER CORPORATION ©2020
Installation and Operation Guide
All rights reserved
38
Wiring and DIP switch/jumper configurations 40 to 41 – FC systems - 4-
pipe
with Reheat for dehumidification, without Humidifier
Outputs
Config. 40:
4-Pipe,
1/2/3 Speeds fan(1),
Heat valve PID
Config. 41:
4-Pipe, Fan VFS, Cool
valve PID
11
Fan high
Fan high
12
Fan medium
(or Economizer
(5)
)
Fan medium
(or Economizer
(5)
)
13
Fan low
Fan low
14
Heat element
(2)
(2nd stage heat)
Heat element
(2)
(2nd stage heat)
15
Cool valve
(3)
Cool valve PID
(3)
16
Heat valve
Heat valve
SW3
SW1
Jumpers
JP2, JP3
analog
outputs
(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 OFF
SW3.1 OFF, SW3.2 ON
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
(page 23).
PID valves: 0-10VDC, 0.5mA Not isolated
Control - Fan on/of, Heat elements, Cool/Heat valves, Economizer: 24VAC, 0.5A max.
Summary of Contents for ComfortVu TB-24-HM
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