Carrier ComfortVu TB-24-HM - Page 34

11
12
13
14
15
16
SW3
SW1
Config. 31:
4-Pipe,
1/2/3 Speeds
fan
Fan high
Fan medium
(or Economizer )
Fan low
Heat element
(2
nd
stage heat)
Cool valve
Heat valve
(1
st
stage heat)
Config. 32:
4-Pipe, 1/2/3
Speeds fan ,
Floor heating
Heat valve
(2
nd
stage heat)
Cool valve
Config. 33:
4-Pipe, 1/2/3
Speeds fan ,
Cool valve PID
Cool valve PID
Heat valve
(1
st
stage heat)
Config. 34:
4-Pipe,1/2/3
Speeds fan ,
Cool valve PID,
Floor heating
Cool valve PID
Heat valve
(2
nd
stage heat)
Fan high
Fan medium
(or Economizer )
Fan low
Fan high
Fan medium
(or Economizer )
Fan low
Fan high
Fan medium
(or Economizer )
Fan low
Floor heating (1
st
stage heat – no fan)
Heat element
(2
nd
stage heat)
Floor heating (1
st
stage heat – no fan)
87654321
654321
87654321
654321
87654321
654321
87654321
654321
JP3 JP2
3
Jumpers
JP2, JP3
for analog
outputs
1
3 1
JP3 JP2
3 1 3 1
JP3 JP2
3 1 3 1
JP3 JP2
3 1 3 1
- 34 -
Wiring and DIP switch/jumper configurations – FC systems – 4-pipe
w/wo Floor heating
Outputs
See drawing on page 21 for DIP switch and jumper locations.
Fan VFS, PID valves: 0-10 Vdc, 0.5 mA Not isolated
Control – Fan on/off, Heat elements, Cool/Heat valves, Economizer: 24 Vac, 0.5A max
(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)
(5)
SW1.6 – Terminal 12 operation: ON = Economizer
OFF = Fan Medium (3 speeds) / Terminal not in use (1/2 speeds)
Important: Economizer will not work in 3 fan speeds configuration.
(1)
(5)
(1)
(1)
(5) (5) (5)
(3)
(2)
(3) (3) (3)