Lennox International Inc 51M37 Displaying Outside Temperature, Check Outside Temperature

Displaying Outside Temperature

Pressing the ENTER (Outside) button at the HOME screen displays the outside temperature (see figure 15) for several seconds, then returns to room temperature.

Check Outside Temperature

After either programmed interval has elapsed, the remind-

er will be displayed as shown in figure 17.

		Reminders
PROG	MO	I0:26
	AM
A B C D
HOLD PM

88 Fan Hold

Settings Enter

(Outside)

Figure 15

FAN ON

AUTO

FILTER SERVICE

MAINTENANCE

ROOM

76°

COOL

OFF

AUTO

EMG.

HEAT

Filter &

Maintenance

Indicators

SETTINGS − Filter/Maintenance Reminders

The 51M39 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 once or twice for the desired re-

FAN ON

AUTO

FILTER SERVICE

MAINTENANCE

ROOM

76°

COOL

OFF

AUTO

EMG.

HEAT

Service

Indicator

Flashing

minder as shown in figure 16 and as described in table 1.

Reminder Settings Display

OFF

For FILTER, press SETTINGS button 1 time

FILTER
	For MAINTENANCE, press
MAINTENANCE	SETTINGS button 2 times

Figure 16

The default setting for the reminders is OFF (disabled). Press Up/Down arrow buttons to select the desired re- minder intervals.

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 day,
to scroll		1 month reminder displays in 2
selections		calendar months.
Settings	MAINTE-	Elapsed chronological time in
(2nd press)	NANCE	months (Off, 6, 12). Use this, for
then Arrows		example, to remind yourself when to
to scroll		perform routine checks or when to
selections		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.

Figure 17

After the filter has been changed or maintenance per-

formed, reset the reminder by pressing the SETTINGS

button for 4 seconds at the corresponding reminder set-

tings screen. The screen will blink for a few moments to in-

dicate that the timer has been reset.

Service Indicator

When abnormal equipment operation is detected, the

SERVICE indicator will flash on the screen (see figure 17).

This indicates that the equipment requires service from a

qualified service technician.

Thermostat RESET

Under some abnormal conditions, it may be necessary to

the thermostat to its default condition. Such a RE-

SET would delete all programming and settings and there-

fore should only be used on rare occasions when the the thermostat fails to function as designed and/or as pro- grammed. Such an instance can occur as a result of a pow- er surge or similar electrical disturbance (e.g. after an elec- trical storm or power outage). The RESET button can be

used to recover from this situation.

CAUTION

When the RESET button is pressed, ALL settings re- vert back to the defaults, including the default pro- gram (see tables 2 and 3).

The RESET button is an unlabeled, recessed button lo- cated behind the door on the right−hand side of the thermo- stat, below the SETTINGS button (see figure 3). Use a pa- per clip or small pencil to press the RESET button; ALL thermostat settings will be reset to the defaults listed in the

Default Thermostat Settings section.

Page 6

505068M 07/05