OWNER’S GUIDE E2007 Lennox Industries Inc. Dallas, Texas, USA ComfortSenset 5000 Series Models L5711U and L5732U Programmable Touch Screen Thermostats IMPORTANT Read and save these instructions.
Table of Contents Thermostat Features . . . . . . . . . . . . . . . . . . . . . . . . . . Thermostat Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fan Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Program Your Heating and Cooling Schedule . . . . . Fan Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cancel a Schedule Period . . . . . . . . . . . . . . . .
S S S Override options allow you to easily override the programmed schedule. Same−schedule programming allows you to program a schedule for several days at once. No need to copy. Armchair programming allows you to remove the thermostat from the wall while you program your schedules.
Thermostat Display (Continued) INSIDE SHOWS CURRENT INSIDE TEMPERATURE TUE SHOWS CURRENT DAY OF THE WEEK SET TO SHOWS CURRENT TEMPERATURE SETTING FAN SHOWS FAN SETTING TUE FAN Set To AUTO SYSTEM HEAT AM SYSTEM SHOWS CURRENT SYSTEM POSITION OUTSIDE SHOWS CURRENT OUTSIDE TEMPERATURE (IF SYSTEM INCLUDES OUTSIDE TEMPERATURE SENSOR) TIME SHOWS CURRENT TIME OF DAY, HOLD TIME REMAINING OR NUMBER OF VACATION DAYS REMAINING Page 4 FOLLOWING SCHEDULE INDICATES THAT THERMOSTAT IS FOLLOWING THE PROGRAMMED SC
System Settings TUE FAN Set To Inside AUTO Following Schedule SYSTEM Outside HEAT AM SCHED HOLD CLOCK SCREEN MORE PRESS SYSTEM SELECT SETTING OF HEAT, OFF, COOL OR EM HEAT (HEAT PUMP SYSTEMS ONLY) SYSTEM SETTINGS The system setting options vary based on your heating and/or cooling type. HEAT Thermostat controls heating system. OFF Both heating and cooling systems are off. COOL Thermostat controls cooling system.
Fan Settings PRESS FAN. SELECT SETTING: ON, AUTO OR CIRC. TUE FAN Set To Inside AUTO Following Schedule SYSTEM Outside HEAT AM SCHED HOLD CLOCK SCREEN MORE FAN SETTINGS ON Fan runs continuously. Use this setting for improved air circulation or for more efficient central air cleaning. AUTO Fan runs only when heating or cooling system is on. CIRC Fan runs randomly approximately 35% of the time.
Program Your Heating and Cooling Schedule NOTE − The thermostat includes a battery which makes it possible for you to remove the thermostat from the wallplate during program. See page 19. Your thermostat can control up to four different schedule periods per day: Wake Time when you awaken and want your home at a comfortable temperature. Leave Time when you leave the home and prefer an energy−saving temperature setting.
Program Your Heating and Cooling Schedule (Cont.) 3 − Select any combination of days to edit. You may select multiple days. These should be days that you wish to follow the same schedule. Check marks appear next to the days that are selected. After the first day is selected, the SCHEDULE screen returns to the display. 4 − Press the WAKE key. The WAKE key will flash to show it is selected. 5 − Press the UP and DOWN keys to modify time and heat and cool temperatures shown on the screen.
Program Your Heating and Cooling Schedule (Cont.) NOTE − The FAN setting can be programmed for ON, AUTO or CIRC for each period selected. See following page for more information about fan setting options. 9 − Press DONE key when finished. Saving changes screen appears to indicate that schedule changes are being saved to the days selected. 10 − Repeat steps 1 through 9 to set a program schedule for the remaining days of the week.
Fan Schedule The FAN setting can be programmed for ON, AUTO or CIRC for each period selected: ON Fan runs continuously. Use this setting for improved air circulation or for more efficient central air cleaning. AUTO Fan runs only when heating or cooling system is on. CIRC Fan runs randomly approximately 35% of the time. Use this setting for improved air circulation or for more efficient central air cleaning when you do not want the fan to run continuously.
Cancel a Schedule Period You may wish to cancel a period to match your lifestyle. For example, if someone is always home during the day on Tuesday, you can cancel the LEAVE and RETURN periods to have the thermostat hold the WAKE temperature until the SLEEP period is reached. 1 − Press the SCHED key. The SCHEDULE screen will be displayed. 2 − Press the EDIT key. The screen will change to display the days of the week across the top.
Set the Time 1 − Press the CLOCK key. The current time setting will be displayed as shown below. 2 − Use the arrows to set the correct time. 3 − Press DONE key. IMPORTANT − The current day of the week should be displayed correctly on this screen. If not, refer to the Advanced Settings section to correct the day of the week display.
Override Temperature Setting Temporary Hold You may use the temporary hold function to override the programmed temperature setting until the next scheduled period or until a particular time that you wish. 1 − Press the UP or DOWN arrow next to the temperature display to adjust the temperature as desired. NOTE − Hold Temperature Until" appears on the screen. The currently programmed start time of the next scheduled period also appears, as does an additional set of arrows.
Override Temperature Setting Permanent Hold The permanent hold function overrides the programmed temperature setting until the permanent hold is cancelled. 1 − Press the HOLD key. NOTE − Permanent Hold" appears on the screen under the current time. 2 − Use the UP and Down to adjust the temperature to the setting that you want the thermostat to hold. 3 − Press CANCEL key to cancel permanent hold and resume schedule. Following Schedule" appears on the screen to indicate that the hold has ended.
Override Temperature Setting Vacation Hold You may use the vacation hold function to override the programmed temperature setting for a designated number of days. 1 − Press the UP or DOWN arrow next to the temperature display to adjust the temperature as desired. NOTE − Hold Temperature Until" appears on the screen. The currently programmed start time of the next scheduled period also appears, as does an additional set of arrows.
Temperature Recovery Feature Your thermostat is equipped with a feature that accommodates recovery time to ensure your comfort. Recovery time is the time that it takes your heating and cooling equipment to recover from energy−saving settings programmed during away or asleep periods. Recovery time depends on local weather, your schedule, the contruction of your home and your heating and/or cooling equipment.
Clean the Thermostat Screen The thermostat screen may be cleaned, if necessary. 1 − Press the SCREEN key. The thermostat locks the touch screen for 30 seconds to allow for cleaning. 2 − Use a damp cloth slightly moistened with water or household glass cleaner to clean the screen. IMPORTANT − Do not spray any type of liquid directly onto the thermostat. Spray the water or household glass cleaner on a cloth, then use the cloth to clean the thermostat screen. 3 − Repeat the above steps as necessary.
Battery Replacement If your thermostat has batteries, a low battery warning flashes on the home screen for approximately 30 days. IMPORTANT − Batteries should be replaced once per year to prevent leakage and to prevent loss of battery back−up in a power outtage. You may also wish to replace the batteries prior to leaving your home for more than a month. 1 − When the low battery indicator is flashing, replace the batteries promptly with three fresh AAA alkaline batteries.
Battery Replacement (Continued) 3 − Remove the old batteries and insert three fresh AAA alkaline batteries, as marked on the thermostat. BACK OF THERMOSTAT + + + BATTERIES (3) 4 − Align the terminal screw blocks with the pins on the back of the thermostat. 5 − Push the thermostat straight onto the wallplate until it snaps into place.
Reminder Timers The reminder timers notify you when it is time to change the furnace filter, humidifier pad or ultraviolet lamp. When one of the set timers expires, a reset key appears on the home screen. Reset Timers 1 − Change" reminder appears on the screen when the timer expires. 2 − Press the RESET key to restart the timer. If more than one timer expires at the same time, press the RESET key until all timers have been reset.
Built−In Compressor Protection The thermostat provides built−in compressor protection (minimum−off timer) that prevents the compressor from restarting too early after a shutdown. The minimum−off timer is activated after the compressor shuts off. If there is a demand for compressor operation during the delay, the thermostat displays the WAIT message.
Outdoor Temperature If an optional outdoor temperature sensor has been installed with your thermostat, the outdoor temperature is displayed in the lower right corner of the home screen. If the temperature is not displayed and an outdoor temperature sensor has been installed, press the MORE key until the outside temperature is displayed.
Screen Lock You can fully or partially lock the keys on the touch screen. See the Advanced Settings section for more information on this feature. If the thermostat displays a Screen Locked" message, your thermostat screen is either fully or partially locked. Partially Locked Screen When partially locked, all touch screen keys are locked except the temperature up and down arrow keys and the SYSTEM key access to the user set−up options.
Advanced Settings Your thermostat has many advanced settings that can be used to match your desired use of this important tool. These items have been set by the installer during the installer set−up process; however, use the following information to customize the settings for your use. Use the following steps and the User Set−Up table on pages 25 through 27 to customize your thermostat operation. 1 − Press and release the SYSTEM key.
Advanced Settings (Continued) 4 − Refer to the figure below to see how the thermostat buttons are used to make selections. 5 − Refer to the table on the following pages to make proper set− up choices for your application. 6 − When all set−up selections have been made, press the DONE key to save your settings. The thermostat display will return to the main screen. NOTE − Thermostats manufactured beginning March 2006 include program selection to accommodate 2007 daylight savings calendar.
Advanced Settings (Continued) User Set− Up No. Set−Up Name Selection Description 0120 Date (Year/first) Select first two digits of current calendar year (20 for 2007, etc.) 0130 Date (Year/last) Select last two digits of current calendar year (07 for 2007, etc.) Options: 01 to 99 available. 0140 Date (Month) Select number that represents current calendar month. Options 1 through 12. 0150 Date (Day) Select number that represents current calendar date. Options 1 through 31.
Advanced Settings (Continued) User Set− Up No. 0330 0500 0510 Set−Up Name Selection Description Daylight Savings Options: 0 − Off. Thermostat time is not automatically adjusted for DST. 1 − On. Thermostat time is automatically adjusted for Daylight Savings in the Fall and Spring (using the pre−2007 DST calendar) 2 − On.
Advanced Settings (Continued) User Set− Up No. Set−Up Name Selection Description 0520 UV Lamp Replacement Reminder Select option for UV lamp replacement reminder timer. Options: 0 − Reminder is off 1 − 365 run time days 0540 Select option for number of scheduling periods. Options: Number of Peri2 − Two periods (wake and sleep) ods 4 − Four periods (wake, leave, return, sleep) 0640 Clock Format Select clock format.
Troubleshooting Tips If... Then... Key to the right of the screen key is blank. MORE key remains blank unless the Furnace Filter Change Reminder has been turned on. See User Set−Up Number 0500. Display is blank. Check that fresh AAA alkaline batteries are installed as marked on the thermostat. Temperature settings do not change. Check that temperature settings are: Heating system does not turn on. ¯ Press the SYSTEM key to set to heat. ¯ Heating 40°F to 90°F (4.5°C to 32°C).
Troubleshooting Tips If... Then... Cooling system does not turn on. ¯ Press SYSTEM key to set to Cool. ¯ Check the cool temperature setting to be sure it is set below the room temperature and Cool On" is displayed solidly on the screen. ¯ Make sure circuit breaker is not tripped. ¯ Check the power switch at the heating and/or cooling system to make sure it is on. ¯ Check the furnace door to make sure it is closed securely. ¯ Wait five minutes for the cooling system to respond.
Troubleshooting Tips If... Then... Cool On" is not displayed on the screen. Set the System setting to Cool and set the temperature setting below the room temperature. If Cool On" is shown solidly in the display, but the cooling system does not turn on, see Cooling system does not turn on" suggestions at the top of this page. Wait" is displayed on the screen. Compressor minimum−off timer is activated. Wait up to five minutes for the compressor to turn on.
Troubleshooting Tips If... Then... Heating system does not turn off and the heat temperature setting is set below the room temperature ( Heat On" is not shown in display.) Check Installer Set−Up Number 170: Heating and/or Cooling Type*. Make sure the setting matches the installed heating and/or cooling system. Red LED is lit in the upper right corner of the thermostat when the system monitor detects a possible problem. A system monitor is wired to the thermostat L terminal.
