Power The Thermostat; Wiring 24 Vac Common; Installing Batteries; Setting Calendar And Time - Lennox T7300 Installation Instructions Manual

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 figure 11).
BATTERIES (3)
Figure 11 − Installing Batteries
2. Locate and remove the tab labeled Remove (see
figure 12).
SET CURRENT DAY
SET MONTH
MON MON TUE WED WED THU THU FRI FRI SA SA SUN
OK TO PICK MUL TIPLE DAYS SCREEN LOCKED
CHANGE FILTER UV LAMP HUMIDIFIER PAD
DONE
USE ARROWS TO SET YEAR AND TIME
Figure 13 − Setting Date and Time after Initial Powerup
IMPORTANT
This tab must be removed in order to set
the real−time clock.
REMOVE
TAB
Figure 12 − Remove tab labeled REMOVE from

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
figure 13).
SETTING CALENDAR AFTER THERMOSTAT IS
ALREADY FUNCTIONING
See steps 1 through 4, in the Advanced Settings section
to set year, month and day.
MON MON
OK TO PICK MUL TIPLE DAYS SCREEN LOCKED
CHANGE FILTER UV LAMP HUMIDIFIER PAD
DONE
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thermostat back.
WED WED THU THU FRI FRI SA SA SUN
PM