TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT
62-3070—03 8
POWER THE THERMOSTAT
You can choose from three methods to power the
thermostat:
• Batteries only (AAA alkaline).
• 24 Vac direct connection only.
• 24 Vac direct connection with battery backup (AAA
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 three AAA alkaline batteries on the back of
the thermostat as marked. See Fig. 22.
Fig. 22. Installing batteries.
2. Locate and remove the tab labeled Remove. See
Fig. 23.
IMPORTANT
This tab must be removed in order to set the
real-time clock.
Fig. 23. Remove tab labeled REMOVE from
thermostat back.

Setting Calendar and Time

Setting Calendar

This thermostat is designed to, under normal use,
automatically keep current time and day in memory for up
to ten years once the calendar is set. There are two ways
to set the calendar for this thermostat:
SETTING CALENDAR WHEN THERMOSTAT IS FIRST POWERED
When the thermostat is first powered, the display is ready
to set the calendar and time. The thermostat proceeds
through a sequence of setup screens. See Fig. 24.
SETTING CALENDAR AFTER THERMOSTAT IS ALREADY
FUNCTIONING
See steps 1 through 4, in the Advanced Settings section,
to set year, month and day.
Fig. 24. Setting calendar and time after initial powerup.

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. 25.
M19918
BATTERIES (3)
REMOVE DURING
INSTALLATION
M19920
REMOVE
TAB
REMOVE DURING
INSTALLATION
DONE
MON
MON
TUE WED
WED
THU
THU
FRI
FRI
S
S
A
A
SUN
CHANGE FILTER UV LAMP HUMIDIFIER PAD
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
DONE
MON
MON
WED
WED
THU
THU
FRI
FRI
S
S
A
A
SUN
PM
CHANGE FILTER UV LAMP HUMIDIFIER PAD
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
SET CURRENT DAY
SET MONTH
USE ARROWS TO SET YEAR AND TIME M22761