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Sensi Touch 2 Smart Thermostat | INSTALLATION GUIDE 13
ACCESSORY DEVICE
2-Wire accessory
Device has it’s own power
source to turn the unit on.
Set switch on the back of
the thermostat to “Accessory.”
Thermostat Accessory
Thermostat Accessory
1-Wire accessory
Device pulls power from the
HVAC system. Set switch on the
back of the thermostat to “System.”
ACC+
ACC-
ACC+
Wire 1
Wire 2
24V
24VAC switch
Accessory
System
NOTES