Replacing The Batteries; Power Outages - Honeywell Chronotherm III User Manual

REPLACING THE BATTERIES

Your thermostat uses three AAA
alkaline batteries. The display will
flash "REPL BAT" when the bat-
teries get low. Unless the display
is blank (indicating the batteries
are dead) when you start, you
won't have to reprogram the
thermostat if you can insert the
new batteries within 20-30
seconds of taking out the old
ones.

POWER OUTAGES

Reasonably fresh backup batter-
ies will hold the programming
and keep the display on during
most power outages. Once the
power is restored, the system will
resume normal operation.
To replace:
Set the system switch to OFF.
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Remove the thermostat from
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the wall. See page 27.
Lift the batteries out of the
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holder.
If the display goes off when
power is lost, either the backup
batteries need to be replaced or
are not installed. When power is
restored, the display will flash
1:00 PM to remind you to
reprogram.
Insert the new batteries, mak-
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ing sure the positive (+) termi-
nals all face toward the right.
Replace the thermostat on the
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wall. See page 28.
Reprogram, if necessary.
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30