Carrier ComfortVu TB-24-HM Installation And Operation Manual page 38

Wiring and DIP switch/jumper configurations – FC systems – 4-pipe
with Humidifier, without Reheat for dehumidification
Config. 42:
4-Pipe,
1/2/3 Speeds fan ,
Humidifier
Outputs
11 Fan high
Fan medium
12
(5)
(or Economizer )
13 Fan low
14 Heat valve
(3)
15 Cool valve
16 Humidifier
SW3
1 2 3 4 5 6 7
SW1
1 2 3 4 5 6
Jumpers
JP2, JP3
for analog
outputs
SW3.1, SW3.2 – Fan speeds:
(1)
SW3.5 – Chilled beam option:
(3)
SW1.6 – Terminal 12 operation:
(5)
See drawing on page 21 for DIP switch and jumper locations.
PID valves, Humidifier: 0-10 Vdc, 0.5 mA Not isolated
Control – Fan on/off, Heat elements, Cool/Heat valves, Economizer: 24 Vac, 0.5A max
Config. 43:
4-Pipe,
(1)
1/2/3 Speeds fan , 1/2/3 Speeds fan ,
(1)
Cool valve PID,
Humidifier
Fan high
Fan medium
(5)
(or Economizer )
Fan low
Heat valve
(3)
Cool valve PID
Humidifier
8 1 2 3 4 5 6 7 8
1 2 3 4 5 6
1 speed (Low):
2 speeds(Low and High):
3 speeds(Low, Medium, and High):
ON = Enable chilled beam (fan will not run with cooling)
ON = Economizer
OFF = Fan Medium (3 speeds) / Terminal not in use (1/2 speeds)
Important: Economizer will not work in 3 fan speeds configuration.
Config. 44:
4-Pipe,
(1)
Heat valve PID,
Humidifier
Fan high
Fan medium
(5)
(or Economizer )
Fan low
(3)
Cool valve
Heat valve PID
Humidifier
1 2 3 4 5 6 7 8
1 2 3 4 5 6
SW3.1 = ON, SW3.2 = OFF
SW3.1 = OFF, SW3.2 = ON
SW3.1 = OFF, SW3.2 = OFF
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