FAN − Controlling the Fan Operation
Use the FAN button to select either continuous fan mode or auto fan mode.
To change from continuous to auto fan mode (or vice ver- sa), press the FAN button. Note whether a fan icon in the FAN box is present (indicating that the fan is running) or not (fan not running).
If continuous fan mode is enabled (ON displayed in FAN box − see figure 15), the fan will run continuously regard- less of whether the heating or cooling equipment is run- ning.
SETTINGS − Filter/Maintenance Reminders
The 51M42 thermostat is designed to remind you when the filter needs changing or when routine maintenance is re- quired, as (and if) defined, by you. These optional remind- ers are not enabled until you activate them. To do so, press the SETTINGS button (shown below the FAN button in fig- ure 16) once or twice for the desired reminder as shown in figure 18 and as described in table 1.
Reminder Settings Display
Using Fan ON
i0:30
72
Heat Cool
Prog Auto
Copy Day/Time
Fan Hold
OFF
For FILTER, press SETTINGS button 1 time
|
|
|
|
FILTER |
|
|
|
| For MAINTENANCE, press | ||
|
| ||
MAINTENANCE | SETTINGS button 2 times | ||
Figure 15
If auto fan mode is selected (AUTO displayed in FAN box − see figure 16), the fan will only run when the heating or cooling equipment is running.
Figure 18
The default setting for the reminders is OFF (disabled). Press Up/Down arrow buttons to select the desired re- minder intervals.
Using Fan AUTO
i0:30 72
Heat Cool
Prog Auto
Copy Day/Time
Fan Hold
Table 1
Filter and Maintenance Reminders
Buttons to |
| Available Settings and |
Use | Reminder | How to Use |
|
|
|
Settings | FILTER | Total fan run time expressed in |
(1st press) |
| months (Off, 1, 3, 6, 12); for |
| ||
then Arrows |
| example, if fan runs 12 hours a |
to scroll |
| day, 1 month reminder displays |
Figure 16
Displaying Outside Temperature
Pressing the ENTER (Outside) button at the HOME screen displays the outside temperature (see figure 17) for several seconds, then returns to room temperature.
Check Outside Temperature
88 | Fan Hold |
Settings Enter
(Outside)
Figure 17
selections |
| in 2 calendar months. |
|
|
|
Settings | MAINTE- | Elapsed chronological time in |
(2nd press) | NANCE | months (Off, 6, 12). Use this, |
then Arrows |
| for example, to remind yourself |
to scroll |
| when to perform routine checks |
selections |
| or when to call a technician for |
|
| perodic preventive |
|
| maintenance. |
Enter |
| Stores settings. |
|
|
|
NOTE − The HOME screen will reappear about 15 seconds after the final arrow button press. OR, press the ENTER button at any time to store any changes and exit to the HOME screen.
After either programmed interval has elapsed, the remind- er will be displayed as shown in figure 19.
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