Lennox International Inc. 51M37 - Manual (Page 41)

Page 5
51M42 SERIES 5/2
Temporary (2-Hour) Hold
At any time the program is running, from the HOME
screen, set a temporary 2-hour hold by pressing the Up/
Down arrow buttons until the desired setpoint is displayed;
HOLD" flashes (see figure 12). This overrides the pro-
gram for 2 hours from the last button press, then returns to
the program.
Heat
Prog
Fan
Settings
Cool
Day/Time
Hold
Enter
Temporary Hold Temperature Mode
Figure 12
(DOOR
OPEN)
Auto
Copy
(Outside)
68
i0:30
72
70
While in Temporary Hold, press the HOLD button once to
switch to Permanent Hold (HOLD displays solid; PROG
not displayed); press the HOLD button again to return to
the program (PROG displays; HOLD not displayed).
PROG − Thermostat Programming
The 51M42 thermostat can be programmed to perform a
set of both heating and cooling events for each day of the
week. Each day can be programmed for 4 unique events
per day, and each day can be different from any other day.
To Set Program Events and Temperatures
Figure 13 gives an example of how up to 7 different pro-
grams can be set. Programs A and C reflect the desired
warmth while the home IS occupied (72°); B allows less
heating while the home is NOT occupied; D reflects a cool
sleeping temperature.
NOTE − The example in figure 13 shows heat setpoints; a
similar program may be set for cool setpoints.
1. Press and release the PROG button. "MO" (Monday),
"AM 6:00", period "A", "COOL SETPOINT 78", and
"HEAT SETPOINT 70" are displayed. "AM 6" flashes.
2. Use the Up/Down arrow buttons to select the desired
hour; press the PROG button when the desired hour
is reached; use the Up/Down arrow buttons again to
select desired minute. The selected hour/minute is
when the program will start. Press the PROG button.
3. Use the Up/Down arrow buttons to select the desired
heat setpoint; press the PROG button.
4. Use the Up/Down arrow buttons to select the desired
cool setpoint; press the PROG button.
NOTE − Pressing the ENTER button during the following
programming steps, saves and exits to the HOME screen.
To program events and temperatures, perform the follow-
ing steps.
Figure 13
Program Example
6AM NOON 6PM MID 6AM
NIGHT
A
B
D
A
B D
A
B D
A
B D
A
B
C
D
A
B
C
D
A
B
C
D
C
C
C
C
SATURDAY PROGRAM: 72°
68°
64°
SUNDAY PROGRAM: 72°
68°
64°
FRIDAY PROGRAM: 72°
68°
64°
THURSDAY PROGRAM: 72°
68°
64°
WEDNESDAY PROGRAM: 72°
68°
64°
TUESDAY PROGRAM: 72°
68°
64°
MONDAY PROGRAM: 72°
68°
64°
5. Repeat steps 1 − 4 for Monday, periods B, C, and D.
6. COPY A PROGRAM − If the program entered for
Monday is satisfactory for other days of the week, do
the following to repeat the same program for other
days:
A
Press the PROG button, then press the COPY
button. The display clears the screen except for
Copy from MO with MO" flashing. Press the
COPY button again to copy Monday’s program.
B The display changes to Copy to MO". Use the ar-
row buttons to scroll to the desired day where you
want the same program as Monday. Press the
COPY button.
C Repeat steps A and B for as many days as you
want the same program.
Heat
Prog
Fan
Settings
Cool
Day/Time
Hold
Enter
Copy a Programmed Day to Another Day
Figure 14
(DOOR
OPEN)
Auto
Copy
Copy from MO
(Outside)
7. Repeat steps 1 − 5 to program different times and tem-
peratures for days not yet programmed.