Honeywell Home T10 Pro RedLINK Manual page 7

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Terminal Designations
Conventional Systems
Terminal
S/S Input for a wired indoor, outdoor sensor
Y Compressor Stage 1
Y2 Compressor Stage 2
G Fan Relay
C 24VAC Common wire from secondary side of
cooling transformer (if 2 transformers)
K* Connect to K on C-wire adaptor
U/U** Relay for humidifier, dehumidifier, or ventilator U/U**
A
W Heat Stage 1
W2 Heat Stage 2
R 24 VAC Heating transformer
Rc 24 VAC Cooling transformer
* The THP9045A1098 C-wire adaptor is used on heat/cool systems when you only have four wires at the thermostat and
you need a fifth wire for a common wire. Use the K terminal in place of the Y and G terminals on conventional or heat
pump systems to provide control of the fan and the compressor through a single wire—the unused wire then becomes
your common wire. See THP9045 instructions for more information.
** See note on Wiring U terminals on the following page.
7
M37809
Fig. 8.
Description
T10 PRO SMART THERMOSTAT WITH REDLINK
Wiring UWP
Push down on the tabs to put the wires into the inner holes
of their corresponding terminals on the UWP (one wire per
terminal) until they are firmly in place.
Gently tug on the wires to verify they are secure.
If you need to release the wires again, push down the
terminal tabs on the sides of the UWP. This wiring is just
an example, yours may vary.
Heat Pump Systems
Terminal
S/S Input for a wired indoor, outdoor sensor
Y Compressor Stage 1
Y2 Compressor Stage 2
G Fan Relay
C 24VAC Common wire from secondary side of cooling
transformer
K* Connect to K on C-wire adaptor
Relay for humidifier, dehumidifier, or ventilator
L/A Connect to compressor monitor
O/B Changeover valve for heat pumps
AUX Backup Heat
E Emergency Heat
R 24 VAC Heating transformer
Rc 24 VAC Cooling transformer
7
M37788
Fig. 9.
Description
33-00462—01