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Honeywell Home T10 Programmable Smart Thermostat Installation Guide

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.  
Note: The T10+ models  
can wirelessly link to a  
THM04R3000 EIM. If  
using THM04R3000 EIM,  
wire only R and C to T10+  
to power the thermostat.  
Then follow wiring diagrams  
included in EIM literature.  
M37788  
This wiring is just an example,  
yours may vary.  
Terminal designations  
Conventional Systems  
Description  
Heat pump systems  
Description  
Terminal  
Terminal  
Input for a wired indoor,  
outdoor, or slab sensor  
Input for a wired indoor,  
outdoor sensor  
S/S  
S/S  
Y
Y2  
G
Compressor Stage 1  
Compressor Stage 2  
Fan Relay  
Y
Y2  
G
Compressor Stage 1  
Compressor Stage 2  
Fan Relay  
24VAC Common wire from  
secondary side of cooling  
transformer (if 2 transformers)  
24VAC Common wire from  
secondary side of cooling  
transformer  
C
C
Connect to K on C-wire  
adaptor  
Relay for humidifier,  
dehumidifier, or ventilator  
Connect to K on C-wire  
adaptor  
Relay for humidifier,  
dehumidifier, or ventilator  
Connect to compressor  
monitor  
K*  
U/U**  
A
K*  
U/U**  
L/A  
Changeover valve for heat  
pumps  
Backup Heat  
W
Heat Stage 1  
Heat Stage 2  
O/B  
W2  
Aux  
E
Emergency Heat  
R
Rc  
24 VAC Heating transformer  
24 VAC Cooling transformer  
R
Rc  
24 VAC Heating transformer  
24 VAC Cooling transformer  
*
The THP9045A 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.  
3
GeneralDetails
NameHoneywell Home T10 Programmable Smart Thermostat Installation Guide
MakeHoneywell Home
LanguageEnglish
FiletypePDF (Download)
File size1.52 MB
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Honeywell Home T10 Programmable Smart Thermostat Installation Guide