Programmable Thermostat RTH221
15
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 must be set after you replace the
batteries.
Battery replacement
Set the System switch to Off before removing the batteries. Otherwise, the
heating/cooling system could remain activated even when batteries are
removed.
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