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505050M 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.
NOTE − Tables 2 and 3 on page 8 show all system and
programming defaults.
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 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 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 ar-
rows buttons to change the hour. (AM" or PM" must
correspond to time of day.) Press DAY/TIME
OR
, if ad-
justing for daylight savings time, pressing ENTER
stores the single change and exits to the HOME
screen, bypassing minutes and day of wee
k.
2. Minutes will flash. Use the Up/Down arrow buttons to
display the minutes past the hour. Press DAY/TIME.
3. Day MO" (Monday) will flash. Use Up/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.
Summary of Contents for Merit 51M37
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