Setting Slider Tabs
Set R Slider Tab.
• Use built-in jumper (R Slider Tab)
to differentiate between one or two
• If there is only one R wire, and it is
connected to the R, Rc, or RH terminal, set
the slider to the up position (1 wire).
• If there is one wire connected to the R
terminal and one wire connected to the Rc
terminal, set the slider to the down position
NOTE: Slider Tabs for U terminals should be
left in place for T6 Pro models.
Wiring terminal designations
Universal input for
wired indoor or outdoor
24VAC common. For 2
use common wire from
* Terminal can be jumped using Slider Tab. See "Setting Slider Tabs" above.
** The THP9045A1023 Wire Saver Module 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
Heat Pump fault input (most
Auxiliary heat relay
Heat relay (stage 2)
Emergency Heat relay
Heat relay (stage 1)
Connect to K on Wire Saver
24VAC power from heating
24VAC power from cooling
UWP Mounting System
R/Rc slider tab
Note: Not all
terminals may be
on the system
type that is being
wired. The most