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Page 2

506071−01 02/08

NOTE − Tables 3 and 4 on page 7 show all system and
programming defaults.

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 8.

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 PROG or DAY/TIME button is pressed, a field be-
gins 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 DAY/TIME 

OR

, if adjust-

ing for daylight savings time, pressing the ENTER but-
ton 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 DAY/TIME.

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 DAY/TIME.

4. The HOME screen reappears; confirm day and time

are correct. This completes day and time setting.

Summary of Contents for ComfortSense L3722C

Page 1: ...rogram 6 FAN Controlling Fan Operation 5 Displaying Outside Temperature 6 SETTINGS Filter Maintenance Reminder 6 Service Indicator 6 Thermostat RESET 6 Removing Installing Thermostat 7 Default Thermostat Settings 7 Thermostat Output Table 7 Technical Specifications 7 General These instructions are intended as a general guide and do not supersede local codes in any way Consult authorities having ju...

Page 2: ...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 rea...

Page 3: ...during a demand NOTE Heating equipment is activated for at least 3 min utes if no buttons are pressed during the demand interval COOL Using the Cool Mode Enabling and Disabling Cool Mode Use the COOL button to enable or disable cool mode as desired If the thermostat is in heat or off mode cool mode is enabled when the COOL button is pressed This is indi cated by COOL on the right side of the displ...

Page 4: ...oint is displayed to the right of the actual room temperature Each button press adjusts the setpoint up or down by 1 degree After the desired setpoint is reached the HOME screen will reappear after about 15 seconds Permanent Hold Mode At any time the program is running from the HOME screen set a permanent hold program override by press ing the HOLD button see figure 9 The thermostat now functions ...

Page 5: ...g to repeat the same program for other days A Press the PROG button then press the COPY button The display clears the screen except for Copy from MO with MO flashing Press the COPY button again to copy Monday s program B The display changes to Copy to MO Use the ar row buttons to scroll to the desired day where you want the same program as Monday Press the COPY button C Repeat steps A and B for as...

Page 6: ...onds 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 17 COOL OFF AUTO EMG HEAT I0 26 PROG A B C D HOLD FAN ON AUTO FILTER SERVICE MAINTENANCE 76 ROOM MO AM PM COOL OFF AUTO EMG HEAT FAN ON AUTO FILTER SERVICE MAINTENANCE 76 Servic...

Page 7: ... is above setpoint 0 5F but below setpoint 1 5F AND 30 minute upstage timer HAS NOT expired With a LARGE cool demand temperature is above setpoint 1 5F OR 30 minute upstage timer HAS expired Default Thermostat Settings Default thermostat settings are in table 3 and the default program is shown in table 4 Table 3 Default Thermostat Settings Mode Heat Perm Hold Heat Setpoint Perm Hold 70 F or 21 C C...

Page 8: ...me elapsed time between any furnace activation next furnace activation 6 minutes Minimum elapsed time between any compressor activa tion and the next compressor activation 6 minutes NOTE All protection timers except the compressor OFF timer can be over ridden if a heating or cooling demand is initiated or terminated using the UP DOWN HEAT or COOL buttons Equipment Protection Override Both the mini...

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