FIG. 1
Page 22
Battery Replacement
The batteries are easily accessible from the battery
slot located on the front of the thermostat (fig. 1). To
open the battery slot, press down on the battery
cover (fig. 1) and pull out (fig. 2).
Place the bottom hook of the battery cover into the
slot and snap closed (fig. 4).
FIG. 1
FIG. 2
Press
down
Pull out
Battery
Slot
FIG. 4
Snap closed
Bottom
Hook
OWNER'S MANUAL
S1-THEH21P5S
The batteries must be replaced
immediately when the thermostat
displays the low battery icon (fig.
1). If the thermostat is connected
to 24v power, the batteries should
still be installed. Installing the batteries when
system powered (24VAC) will keep the clock
running in the event of line power interruption.
Remove the old batteries and replace with the new
AA alkaline batteries (fig. 3).
FIG. 3
New
batteries
in
AA
alkaline
WARMER
COOLER
OFF
COOL
HEAT
NEXT
RESET
FILTER
RUN
OF
SET
EMERGENCY
NORMAL
LOCKOUT
AUTO
ON
FAN
AUXILIARY HE
AT
PROGRAM
Old
batteries
out
