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Inserting Clock Batteries - Honeywell T8090A/191108A Owner's Manual

Heating or cooling thermostat and wallplate or heating/cooling thermostat and subbase
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Inserting Clock Batteries

Power is supplied to the clock by the 24 Vac
transformer, by two AAA alkaline batteries
(included), or by the heating or cooling control
circuit. Backup batteries may be installed to
supply power to the clock if power is inter-
rupted when using 24 Vac powering method.
Install batteries in thermostat as shown in
Fig. 2. Once a year or when batteries are dead,
replace with two new AAA alkaline batteries.
We recommend Energizer
69-0574—2
®
batteries.
BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
Fig. 2—Inserting clock batteries.
8
M7188

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191108aQ682bT8090a