Lennox International Inc 51M37 operation manual Settings

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
to scroll		day, 1 month reminder displays
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 16.

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

Service Indicator

When abnormal equipment operation is detected, the SERVICE indicator will flash on the screen (see figure 16). 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.

Removing/Installing Thermostat

The thermostat hinges on tabs on the top of the subbase; no tool is needed to remove the thermostat from the sub-

FAN ON

AUTO

FILTER SERVICE

MAINTENANCE

ROOM

76°

COOL

OFF

AUTO

EMG.

HEAT

Filter &

Maintenance

Indicators

base. Pivot the bottom of the thermostat outward (releas- ing the snaps), then lift up to remove.

To replace it, first position the top tilted toward the wall bracket and align it until you feel the tabs and slots engage; then, while the top is in place, pivot the bottom toward the wall until the thermostat snaps into place.

Default Thermostat Settings

FAN ON

AUTO

FILTER SERVICE

MAINTENANCE

ROOM

76°

COOL

OFF

AUTO

EMG.

HEAT

Service

Indicator

Flashing

Default thermostat settings are in table 2 and the default program is shown in table 3.

Table 2

Default Thermostat Settings

Mode	Heat (Perm. Hold)
Heat Setpoint (Perm Hold)	70°F (or 21°C)
Cool Setpoint (Perm Hold)	78°F (or 26°C)

Figure 16

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.

Fan	Auto
Filter Reminder	OFF
Maintenance Reminder	OFF
Equipment Protection Timers	Reset Back to Zero
Autochangeover	OFF

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505067M 7/13/05