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; flashes (see figure 12). This overrides the pro- gram for 2 hours from the last button press, then returns to the program.

Temporary Hold Temperature Mode

 

 

Heat

Cool

 

 

i0:30

Prog

Auto

 

 

 

 

 

 

70

Copy Day/Time

 

 

 

 

 

72

68

Fan

Hold

(DOOR

 

 

 

 

 

 

OPEN)

 

 

Settings Enter

 

 

 

 

(Outside)

 

Figure 12

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.

Program Example

MONDAY PROGRAM: 72°

 

 

 

68°

A

 

C

 

 

 

 

B

D

64°

 

 

 

 

 

TUESDAY PROGRAM: 72°

 

 

68°

A

C

64°

B

D

 

WEDNESDAY PROGRAM: 72°

 

 

68°

A

C

64°

B

D

 

 

THURSDAY PROGRAM: 72°

 

 

 

68°

A

 

C

64°

 

B

D

 

 

 

 

 

FRIDAY PROGRAM: 72°

 

 

 

68°

A

 

C

64°

 

B

D

 

 

 

 

 

SATURDAY PROGRAM: 72°

 

 

 

 

A

 

 

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

68°

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

64°

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

SUNDAY PROGRAM: 72°

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

C

 

 

 

 

 

68°

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

64°

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6AM

NOON 6PM

MID

6AM

 

 

 

 

 

 

 

 

 

 

 

NIGHT

 

 

 

Figure 13

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 from MO

COPY button again to copy Monday’s program. B The display changes to

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.

Copy a Programmed Day to Another Day

 

Heat

Cool

 

Copy from MO

Prog

Auto

 

 

Copy Day/Time

 

 

Fan

Hold

(DOOR

 

 

 

 

 

 

OPEN)

 

Settings Enter

 

 

 

(Outside)

 

Figure 14

7.Repeat steps 1 5 to program different times and tem- peratures for days not yet programmed.

Page 5

51M42 SERIES 5/2

Page 41
Image 41
Lennox International Inc 51M37 operation manual Mid

51M37 specifications

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