Lennox International Inc. 51M37 - Manual (Page 28)

Page 2
505068M 07/05
Within a few seconds, the HOME screen appears (see fig-
ure 2) with default settings as shown. After about 1 minute
of initialization time, the actual room temperature will be
displayed.
NOTE − Tables 2 and 3 on page 7 show all system and
programming defaults.
COOL
OFF
AUTO
EMG.
HEAT
I0:26
PROG
A B C D
HOLD
FAN ON
AUTO
70
HOME Screen
Figure 2
ROOM
°
MO
AM
PM
At this point, the thermostat will be fully functional; its de-
fault temperature setpoint (not shown) is 70°F. At this
point, if the equipment has been fully powered and if a heat
demand were present, the system would begin operating.
NOTE − Temperature scale default is Fahrenheit units but
may be reset to show Celsius, if desired. See page 8.
Buttons, Backlight, Timers & Settings
Buttons are located behind the small door on the right−
hand side of the thermostat (see figure 3).
IMPORTANT
Do NOT begin pressing buttons until after you read
the following section describing each button.
A pale blue display backlight illuminates for 30 seconds
each time any button is pressed.
When PROG or DAY/TIME button is pressed, a field be-
gins flashing, expecting another input. Start making
changes within 15 seconds or the HOME screen will re-
turn.
Heat
Prog
Fan
Settings
Cool
Day/Time
Hold
Enter
Thermostat Buttons
Figure 3
(DOOR
OPEN)
Auto
Copy
(Outside)
When an Arrow, HOLD, HEAT, or COOL button is pressed,
SETPOINT and the temperature setting appears for 15
seconds. If desired, start making changes within 15 sec-
onds or the HOME screen will return. The backlight will
turn off 15 seconds after the HOME screen reappears.
DAY/TIME − Setting the Day and Time
Press the DAY/TIME button and set the CURRENT hour,
minute, and day of week as follows:
1. AM 12" will flash on the screen. Press the UP/DOWN
arrows to change the hour. ( AM" or PM" must corre-
spond to time of day.) Press DAY/TIME
OR, if adjust-
ing for daylight savings time, pressing the ENTER but-
ton stores the single change and exits to the HOME
screen, bypassing minutes and day of week.
2. Minutes will flash. Use the UP/DOWN arrow button to
display the minutes past the hour. Press DAY/TIME.
3. Day MO" (Monday) will flash. Use UP or DOWN arrow
buttons to display the current day. Day selections are
abbreviated as MO , TU", WE", TH", FR", SA",
and SU". Press DAY/TIME.
4. The HOME screen reappears; confirm day and time
are correct. This completes day and time setting.