Carrier ComfortVu TB-24-HM - Wiring and DIP Switch Configurations

Config. 1:
HC32
1 Speed fan
11
13
14
15
16
Heat element 3
(3
rd
stage heat)
Heat element 2
(2
nd
stage heat)
Fan (1 speed)
Compressor 2
Compressor 1
Heat element 1
(1
st
stage heat)
Config. 2:
HP42
1 Speed fan
Heat element 2
(4
th
stage heat)
Fan (1 speed)
Compressor 2
Compressor 1
Heat pump
Config. 3:
HP22
2/3 Speeds fan
Fan high
Fan low
Compressor 2
Compressor 1
Heat pump
Config. 4:
HP21
2/3 Speeds fan
Fan high
Fan low
Heat element
Compressor
Heat pump
87654321
654321
SW3
SW1
87654321
654321
87654321
654321
87654321
654321
Wiring and DIP switch/jumper configurations – AC systems
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
- 25 -
Heat element 1
(3
rd
stage heat)
Fan medium
(or Economizer )
Fan medium
(or Economizer )
12
Outputs
See drawing on page 21 for DIP switch and jumper locations.
Control – Fan on/off, Heat elements, Heat pump, Compressors, Economizer: 24 Vac, 0.5A max
(5) (5)
(2)
(3) (3) (3) (3)
(2)
(2) (2) (2)
(1)
SW3.1, SW3.2 – Fan speeds: 2 speeds (Low and High): SW3.1 = OFF, SW3.2 = ON
3 speeds (Low, Med., and High): SW3.1 = OFF, SW3.2 = OFF
(2)
SW3.4 – HP (Heat pump): ON = Heat pump active in cool, OFF = Heat pump active in heat
HC (not heat pump): ON = Electrical heater, OFF = Oil/Gas heater (no fan)
(3)
SW3.5 – Compressor delay: ON = Disable, OFF = Enable
(5)
SW1.6 – Terminal 12 operation: ON = Economizer
OFF = Fan Medium (3 speeds) / Terminal not in use (2 speeds)
Important: Economizer will not work in 3 fan speeds configuration.