15
Change filter (RTH2300 only)
Battery replacement
Install two fresh AAA batteries when
Lo Batt flashes on the screen. Lo
Batt appears for 60 days before the
batteries are depleted.
Replace batteries once a year, or
when you will be away for more than a
month.
Most settings are stored in non-
volatile (permanent) memory. Only the
clock and the day must be set after
you replace the batteries.
Pull at bottom to remove
thermostat from wallplate.
Turn thermostat
over, insert fresh AAA
alkaline batteries, then
reinstall thermostat.
Set the System switch to Off before removing
the batteries. Otherwise, the heating/cooling
system could remain activated even when
batteries are removed.
RTHXXXX
W
Not
Used
UP
Heat Off Cool Auto On
Fan
Heat Off Cool Auto On
Fan
Heat O Cool
Auto On
Fan
Set
Hold
Run
Electrical Ratings
Terminal Voltage (50/60Hz) Max. Current Rating
B 20-30 Vac 1.0 A
O 20-30 Vac 1.0 A
G 20-30 Vac 1.0 A
Y 20-30 Vac 1.0 A
W 20-30 Vac 1.0 A
R 20-30 Vac 1.0 A
Rc 20-30 Vac 1.0 A
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