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Power The Thermostat; Installing Batteries; Mount Thermostat To Wallplate - Honeywell TB7220U Installation Instructions Manual

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TB7220U ULTRASTAT PROGRAMMABLE THERMOSTAT

POWER THE THERMOSTAT

You can choose from three methods to power the
thermostat:
• Batteries only (AA alkaline).
• 24 Vac direct connection only.
• 24 Vac direct connection with battery backup (AA
alkaline).
Wiring 24 Vac Common
• Single-Transformer System—Connect the common
side of the transformer to the C screw terminal of the
thermostat wallplate. Leave the metal jumper wire in
place between RC and R.
• Two-Transformer System—Connect the common side
of the cooling transformer to the C screw terminal of
the thermostat wallplate. Remove the metal jumper
wire between RC and R.

Installing Batteries

1. Install two AA alkaline batteries on the back of the
thermostat as marked. See Fig. 21.
BATTERIES (2)
BACK OF THERMOSTAT
Fig. 21. Installing batteries.
2. Locate and remove the tab labeled Remove. See
Fig. 22.
IMPORTANT
This tab must be removed in order to set the
real-time clock.
62-0223—1
BATTERY HOLDER
M22259
REMOVE
TAB
Fig. 22. Remove tab labeled REMOVE from thermostat

Mount Thermostat to Wallplate

1. Align the terminal screw blocks with the pins on the
back of the thermostat.
2. Push the thermostat straight onto the wallplate until
it snaps into place. See Fig. 23.
WALL
Fig. 23. Mount thermostat to wallplate.
8
back.
M22260
M23024

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