ComfortVu™ BACnet Thermostat Model Standard TB-HM (Line voltage)Carrier Proprietary and Confidential CARRIER CORPORATION ©2020
Installation and Operation Guide
All rights reserved
33
Wiring and DIP Switches configurations 20 to 23 – FC systems - 2-pipe
Outputs
Config. 20:
2-Pipe, 1/2/3 Speeds
fan
(1)
Config. 21:
2-Pipe, 1/2/3 Speeds
fan
(1)
, Cool/Heat PID
Config. 22:
2-Pipe, Fan VFS
Config. 23:
2-Pipe, Fan VFS,
Cool/Heat PID
11
Fan high
Fan high
X
X
12
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
X
14
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)
X
16
X
X
X
X
AO1
X
Cool/Heat valve PID
(3)
X
Cool/Heat valve PID
(3)
AO2
X
X
Fan VFS
Fan VFS
SW3
SW1
(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 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 isolated
Control - Heat elements, Cool/Heat valves, Economizer: 110-230VAC, 0.3A max.
Summary of Contents for ComfortVu Standard TB-HM
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