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506072−01 02/08

Within a few seconds, the HOME screen appears (see fig-
ure 2) with default settings as shown. After about 1 minute
of initialization time, the actual room temperature will be
displayed.

COOL

OFF

AUTO

EMG.

HEAT

I0:26

PROG  
A B C D

HOLD

FAN 

ON

AUTO

70

ROOM

°

MO
AM

PM

Figure 2. Home Screen

At this point, the thermostat will be fully functional; its de-
fault temperature setpoint (not shown) is 70°F. At this
point, if the equipment has been fully powered and if a heat
demand were present, the system would begin operating.

NOTE − Temperature scale default  is Fahrenheit units but
may be reset to show Celsius, if desired. See page 7.

Buttons, Backlight, Timers & Settings

Buttons are located behind the small door on the right−
hand side of the thermostat (see figure 3).

IMPORTANT

Do NOT begin pressing buttons until after you read
the following section describing each button.

A pale blue display backlight illuminates for 30 seconds
each time any button is pressed.
When the PROG or DAY/TIME button is pressed, a field
begins flashing, expecting another input. Start making
changes within 15 seconds or the HOME screen will re-
turn.

Heat

Prog

Fan

Settings

Cool

Day/Time

Hold

Enter

(DOOR
OPEN)

Auto

Copy

(Outside)

Figure 3. Thermostat Buttons

When an Arrow, HOLD, HEAT, or COOL button is pressed,
SETPOINT and the temperature setting appears for 15
seconds. If desired, start making changes within 15 sec-
onds or the HOME screen will return. The backlight will
turn off 15 seconds after the HOME screen reappears.

DAY/TIME − Setting the Day and Time

Press the DAY/TIME button and set the CURRENT hour,
minute, and day of week as follows:

1. 

AM

12" will flash on the screen. Press the UP/DOWN

arrows to change the hour. (AM" or PM" must corre-
spond to time of day.) Press the DAY/TIME button 

OR

,

if adjusting for daylight savings time, pressing the EN-
TER button stores the single change and exits to the
HOME screen, bypassing minutes and day of wee

k.

2. Minutes will flash. Use the UP/DOWN arrow button to

display the minutes past the hour. Press the DAY/
TIME button.

3. Day MO" (Monday) will flash. Use UP or DOWN arrow

buttons to display the current day. Day selections are
abbreviated as MO, TU", WE", TH", FR", SA",
and SU". Press the DAY/TIME button.

4. The HOME screen reappears; confirm day and time

are correct. This completes day and time setting.

Summary of Contents for L3711C

Page 1: ...tochangeover Mode 3 HOLD Temperature Hold Mode 4 PROG Thermostat Programming 4 COPY Copy a Program 5 FAN Controlling Fan Operation 5 Displaying Outside Temperature 5 SETTINGS Filter Maintenance Reminder 5 Service Indicator 6 Thermostat RESET 6 Removing Installing Thermostat 6 Default Thermostat Settings 6 Thermostat Output Table 7 Technical Specifications 7 General These instructions are intended ...

Page 2: ...er input Start making changes within 15 seconds or the HOME screen will re turn Heat Prog Fan Settings Cool Day Time Hold Enter DOOR OPEN Auto Copy Outside Figure 3 Thermostat Buttons When an Arrow HOLD HEAT or COOL button is pressed SETPOINT and the temperature setting appears for 15 seconds If desired start making changes within 15 sec onds or the HOME screen will return The backlight will turn ...

Page 3: ...he right side of the display see figure 7 Heat Prog Fan Settings Cool Day Time Hold Enter DOOR OPEN Auto Copy Outside 66 i0 30 75 70 Figure 7 Turn Cool ON OFF If the thermostat is in cool mode pressing the COOL but ton disables cool mode indicated by OFF similar to figure 5 Cooling Demand Set the thermostat to cool mode to control the cooling equipment Then if the room temperature is higher than t...

Page 4: ...HOLD flashes see figure 9 This overrides the program for 2 hours from the last button press then returns to the program While in Temporary Hold press HOLD once to switch to Permanent Hold HOLD displays solid PROG not dis played press HOLD again to return to the program PROG displays HOLD not displayed Heat Prog Fan Settings Cool Day Time Hold Enter DOOR OPEN Auto Copy Outside 68 i0 30 72 70 Figure...

Page 5: ...ling 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 12 the fan will run continuously regard less of ...

Page 6: ...om a qualified service technician Thermostat RESET Under some abnormal conditions it may be necessary to reset 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 simi...

Page 7: ...shown in Celsius position 1 2 3 4 5 6 7 PLUG IN Use Care To Avoid Bending Prongs Figure 17 Changing Fahrenheit Celsius Setting Indoor Temperature Measurement Range Measurement Scale Fahrenheit Measurement Range 35 F to 99 F Measurement Resolution 0 5 F Measurement Accuracy 1 F Field Offset via DIP switches to 3 F Sampling Method temperature measurements sampled every 15 seconds Displayed temperatu...

Page 8: ...ce Reminder Settings of Off 6 or 12 months of chronological time are available When programmed time has elapsed a MAIN TENANCE indicator is displayed Service Reminder The SERVICE indicator is displayed only under the follow ing conditions S if the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes AND the L terminal is shorted to the R terminal OR S if the thermostat Y1 te...

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