Fan Control; Filter Reminder - Lennox MERIT 51M32 Operation Manual

Fan Control

The FAN button is located behind the small door on the
right-hand side of the thermostat. See figure 3. The FAN
button can be used to select either continuous fan mode or
auto fan mode.
If continuous fan mode is enabled, the fan will run continu-
ously regardless of whether the heating or cooling equip-
ment is running. Also, ON will be displayed in the FAN box
as shown in figure 9.
Fan ON with Icon
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Figure 9
If auto fan mode is selected, the fan will only run when the
heating or cooling equipment is running. In this case, AUTO
will be displayed in the FAN box as shown in figure 10.
Fan AUTO with Icon
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Figure 10
To change from continuous to auto fan mode and vice versa,
press the FAN button. Also note the presence of a fan icon in
the FAN box. This icon indicates that the fan is running.
FAN
ON
SYSTEM
HEAT
FAN
AUTO
SYSTEM
HEAT
Page 4

Filter Reminder

The 51M32 thermostat includes a filter reminder feature.
The filter reminder can be set for 1, 3, 6, or 12−month inter-
vals. The SETTINGS button, located behind the door on
the right−hand side of the thermostat is used to set the filter
reminder interval. See figure 3. Press the SETTINGS but-
ton from the HOME screen to display the Filter Reminder
Settings screen as shown in figure 11.
Filter Reminder Settings
0
Figure 11
The default setting for the filter reminder is 0, which dis-
ables the function. Use the UP arrow while in the Filter Re-
minder Settings screen to select the desired interval be-
tween reminders. It may be necessary to press the UP
arrow several times to access the desired setting. The
HOME screen will reappear about 10 seconds after the ar-
row key has been pressed for the final time.
After the programmed interval has elapsed, the FILTER re-
minder will be displayed as shown in figure 12. After the fil-
ter has been changed, reset the filter reminder by pressing
the SETTINGS button for 4 seconds. The screen will blink
for a few moments to indicate that the timer has been reset.
Display of Filter Reminder
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Figure 12
Filter
FILTER
FAN
AUTO
SYSTEM
HEAT