Lennox International Inc. 51M37 - Manual (Page 20)

Page 2
505048M 5/1/05
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.
I2:00
PROG A B C D HOLD
FAN
ON
AUTO
SYSTEM
COOL
OFF
HEAT
70
Home Screen
Figure 2
ROOM
SERVICE
°
FILTER
MAINT
MO TU WE TH FR SA SU
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 7.
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 is pressed, a field begins flash-
ing, expecting another input. Start making changes within
15 seconds or the HOME screen will return.
Heat
Prog
Fan
Settings
Cool
Day/Time
Hold
Enter
Thermostat Buttons
Figure 3
(DOOR
OPEN)
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 ENTER stores
the single change and exits to the HOME screen, by-
passing 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.