11
12
13
14
15
16
SW3
SW1
Config. 28:
2-Pipe,
1/2/3 Speeds fan ,
Humidifier,
Dehumidifier
Fan high
Fan medium
(or Economizer )
Fan low
Cool/Heat valve
Humidifier
Config. 29:
2-Pipe,
1/2/3 Speeds fan ,
Cool/Heat PID,
Dehumidifier
Dehumidifier
(option – See SW1.3)
Cooll/Heat
valve PID
Config. 30:
2-Pipe,
Fan VFS,
Dehumidifier
Cool/Heat valve
Fan VFS
Fan high
Fan medium
(or Economizer )
Fan low
X
Economizer
(option – SW1.6 ON)
Fan low
Heat element
(2
nd
stage heat)
8
7
6
5
4
3
2
1
6
5
4
3
2
1
8
7
6
5
4
3
2
1
6
5
4
3
2
1
8
7
6
5
4
3
2
1
6
5
4
3
2
1
Dehumidifier
Dehumidifier
JP3
JP2
3
Jumpers
JP2, JP3
for analog
outputs
1
3
1
JP3
JP2
3
1
3
1
JP3
JP2
3
1
3
1
- 33 -
Wiring and DIP switch/jumper configurations – FC systems – 2-pipe
with Dehumidifier, w/wo Humidifier
Outputs
See drawing on page 21 for DIP switch and jumper locations.
Fan VFS, PID valves, Hum., Dehum.: 0-10 Vdc, 0.5 mA Not isolated
Control – Fan on/off, Heat elements, Cool/Heat valves, Economizer: 24 Vac, 0.5A max
(1)
(5)
(1)
(5)
(5)
(2)
(3)
(3)
(3)
(4)
(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 – 2
nd
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.
Summary of Contents for ComfortVu TB-24
Page 7: ...TB 24 HM Dimensions 7 ...