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Wiring and DIP switch/jumper configurations 5 to 7 – AC systems
Config. 5:
Outputs
2/3 Speeds fan
Fan high
11
Fan medium
12
(or Economizer
Fan low
13
Heat element 2
14
(2nd stage heat)
Compressor
15
Heat element 1
16
(1st stage heat)
SW3
SW1
Jumpers
JP2, JP3
analog
outputsW
2
(1)
SW3.1, SW3.2 – Fan speeds:
(2)
SW3.4 – HP (Heat pump):
HC (not heat pump):
(3)
SW3.5 – Compressor delay:
(4)
SW1.3 – Dehumidification:
(5)
SW1.6 – Terminal 12 operation:
See drawing for DIP switch and jumper locations (page 23).
Fan VFS: 0-10 Vdc, 0.5 mA Not isolated
Control – Fan on/off, Heat elements, Heat pump, Compressors, Economizer: 24 Vac, 0.5A max
ComfortVu™ BACnet Thermostat Model Standard TB-24-HM (24 Vac)Carrier Proprietary and Confidential
Installation and Operation Guide
HC21
(1)
Economizer
)
(option – SW1.6 ON)
(5)
Heat pump
Compressor
(3)
(2)
2 speeds (Low and High):
3 speeds (Low, Med., and High):
ON = Heat pump active in cool, OFF = Heat pump active in heat
ON = Electrical heater, OFF = Oil/Gas heater (no fan)
ON = Disable, OFF = Enable
ON = Use dehumidifier, OFF = Use reheat for dehumidification
ON = Economizer
OFF = Fan Medium (3 speeds) / Terminal not in use (2 speeds)
Important: Economizer will not work in 3 fan speeds configuration.
Config. 6:
HP11
Fan VFS
X
(5)
(option – SW1.6 ON)
X
(2)
(3)
Fan VFS
28
Config. 7:
HC11
Fan VFS
X
Economizer
(5)
X
Heat element
(2)
Compressor
(3)
Fan VFS
SW3.1 = OFF, SW3.2 = ON
SW3.1 = OFF, SW3.2 = OFF
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