Lennox ComfortSense 7500 User manual

User Guide
Color Touchscreen
Programmable Thermostat
ComfortSense®7500 (13H14)

2
TABLE OF CONTENTS
Features 2....................................
Temperature Dial Indicator 3....................
Home Screen 5................................
Selection Mode 10.............................
Menu Screen 12...............................
Features
The ComfortSense®7500 Series thermostat is an
electronic 7-day, universal, multi-stage, program
mable, touchscreen thermostat. It also offers en
hanced capabilities including humidification / de
humidification / dew point measurement and
control, Humiditrol®EDA (Enhanced Dehumidifi
cation Accessory) control, and equipment mainte
nance reminders.
SLarge, clear color display that shows the cur
rent and set temperature, time, indoor relative
humidity and outdoor temperature (if optional
outdoor sensor is installed and enabled).
SDehumidification measurement and control
SHumiditrol
®EDA capability.
SDew point adjustment control.
SErgonomic design.
SSmooth Setback Recovery starts system
early to achieve setpoint at start of program
period.
SCompressor short-cycle protection (5 min
utes).
SReal-time clock keeps time during power fail
ures and automatically adjusts for daylight
savings time and leap year.
SMaintenance reminders let user know when
to service or replace filters, humidifier pads,
ultraviolet lamps, plus two user or installer de
fined custom reminders.
SProgram Hold options allow user to override
the program schedule as desired by time and
date.
SSelect individual days or groups of days to set
programming.
SProgrammable fan offers increased perfor
mance when combined with whole home in
door air quality products.

3
Temperature Dial Indicator
2:31 am
heat−to
cool−to
80
inside 57%
heat/cool
away
72°
78°
outside
89°
waiting 0
Ⓒ
Ⓑ
Ⓐ
Ⓔ
Ⓓ
Ⓕ
Figure 1. Temperature Dial Feature

4
A. This is the heat set point position indicator
on the dial. This object will be red in color.
B. This is the cool set point position indicator
on the Dial. This object will be blue in color.
C. This is the location where no system demand
will be active. In figure 1, the example would be
any temperature between 73°F and 77°F.
D. When there is an active call for heating, this
area of the dial will fade back and forth from
white to red.
E. When there is an active call for cooling, this
area of the dial will fade back and forth from
white to blue.
F. The yellow line indicates the actual room tem
perature on the temperature dial indicator.

5
Home Screen
2:31 am
heat−to
cool−to
inside 57%
away
72°
78°
outside
89°
X
0
Ⓒ
Ⓑ
Ⓚ
Ⓐ
Ⓘ
ⒺⒻ
Ⓖ
Ⓙ
Ⓓ
Ⓔ
Ⓕ
Ⓗ
80
waiting
Schedule hold
until 8:22 am
schedule 1
Figure 2. home screen

6
Press the screen anywhere - the first press turns
on the backlight.
A. OPERATING MODE - press to access the
screen that will list available modes. Selectable
modes are heat/cool, heat only, cool only, off,
schedule 1, schedule 2, and schedule 3. In
addition fan operation can be set to on, auto or
circulate.
B. AWAY - Selecting AWAY will allow the user to
set the heating and/or cooling mode tempera
tures when away from home.
Press cancel to exit this screen and return
to the home screen and normal system op
erations.
cancel
C. Displays current time.
D. Menu - This will allow access to notifications,
performance report, schedules and set
tings.
E. This allows you to set the heat-to (if enabled)
temperature.Selecting the heat-to or tempera
ture dial position indicator will take you to the
temperature setting detail screen. The temper
ature dial will change from white to red when
heating is active.
F. This allows you to set the cool-to (if enabled)
temperature. Selecting the cool-to or temper
ature dial position indicator will take you to
the temperature setting detail screen. The dial
will change from white to blue when cooling is
active.
G. Indicates the current indoor humidity percent
age in the home along with a humidity icon (rain
drop). The icon changes based on the humidity
level in the home as well.
H. This location could display the outdoor air tem
perature. What is displayed in that location de
pends on what sensor is installed and config
ured through the thermostat user interface. If
neither is installed, then this area will be blank.

7
I. Displays the current indoor temperature.
J. Indicates the schedule is on hold until the next
time period or permanent.
1. Place the schedule on hold by pressing on
either the heat-to or cool-to location on the
screen. If an adjustment is required for the
temperature setting, this can be done now.
2. To continue press twice on any blank area
of the screen.
3. From the override setting screen, the op
tions are 1 hour, 2 hour or Permanent.
Make selection and then press set.
4. For the 1 or 2 hour setting the home screen
will indicate schedule hold until time indi
cated(i.e., 11:57 pm). To exit schedule hold,
press Ⓧ.
5. For the permanent setting the screen will in
dicate schedule hold permanent.To exit
schedule hold, press Ⓧ.
NOTE - When in any hold status, the mode
status area on the screen will go to the cur
rent status mode. For example, from
schedule 1 to heat/cool.
K. System Status Icons - Equipment operation
information appears along the left side of the
home screen to indicate humidification, transi
tioning operating mode, waiting (compressor
delay) emergency heat and transitioning next
schedule setting.

8
Table 1. System Status Icons
Screen Icon Description
Humidifying icon is displayed when humidifying is occurring. Pressing on the icon
will display humidifying next to the icon.
Dehumidifying icon is displayed when dehumidifying is occurring. Pressing on
the icon will display dehumidifying next to the icon.
Red flames indicates the system is heating.
Blue flames indicates the system is cooling.
waiting Snow flake indicates the next mode of operation will be cooling. Waiting indi
cates there is a compressor delay which is by default five minutes.
waiting
Red flame indicates the next mode of operation will be heating.
Waiting indicates there is a compressor delay (heat pump heating) which has a
default of five minutes and is not adjustable.

9
Screen Icon Description
+Red flame with a plus indicates the system is running in emergency heat mode.
Transitioning to next schedule temperature setting. This icon will only appear if
smooth setback recovery is enabled under the installer setup. When enabled, it
will begin recovery up to two hours before the programmed time so that the pro
grammed temperature is reached at the corresponding programmed event time.
Assume 12°F per hour for gas/electric heating and 6°F per hour for first stage
compressor based cooling. When smooth set back recovery is disabled, the
control will start recovery at the programmed time set in the schedule.

10
Selection Mode
Press anywhere in the area indicated below to select how the system will operate.
2:31 am
heat−to
cool−to
78
inside 57%
schedule 1
away
72°
78°
outside
69°
0
Figure 3. Home Screen (Accessing Mode Screen)

11
OPERATING MODES
1. HEAT/COOL allows the thermostat to switch
between heating and cooling automatically.
2. HEAT ONLY allows only heating demand.
3. COOL ONLY allows only cooling demand.
4. OFF indicates system has been turned off.
5. EMERGENCY HEAT allows heat pump sys
tem to use a secondary heat source to come
on and reach the desired user temperature
setting faster.
6. SCHEDULES (up to three), FAN-ON, AU
TO and CIRCULATE (see Edit Schedules on
page 15 for customizing schedules).
7. ON, AUTO and CIRCULATE - Select by
pressing the desired fan operation ON, AU
TO and CIRCULATE. When selected a green
check mark will be indicated.
If FAN mode AUTO, ON or CIRCULATE was se
lected during scheduling for the current period, the
thermostat will indicate the current fan mode in the
information display (FAN ON or FAN CIRC).
In the CIRCULATE mode, the user can cycle the
fan for a programmed period time of active time per
hour during periods of equipment inactivity (i.e.,
heating or cooling equipment not running).
Table 2. Fan Operation
on
Fan is NOT following the
schedule and runs contin
uously until it is changed
from the select mode.
auto
Fan will follow the fan set
ting in the selected sched
ule.
circu
late
Fan is following schedule
and cycles during periods
of equipment inactivity.
Circulate off time is
dependent on user
settings.

12
Menu
menu
performance report
notifications 13
edit schedules
settings
heat−to
cool−to
72°
78°
8
5
7%
0
ool
Figure 4. User Menu Screen

13
NOTIFICATIONS
When a system error or reminder occurs, a pop-up
screen will appear indicating the condition.
SError code notification pop-up can be dismiss
by pressing the back button. Contact the
dealer to resolve the issue.
SFor notification, press either clear or set a fu
ture reminder.
Any active history for notifications (critical errors or
reminders will be listed under settings > notifica
tion.
If critical errors occur, they will also be displayed
undernotifications as illustrated in figure 5. Press
the contractor info option for assistance.
notifications
critical
no external sensor
error code: 0009
<
reminders
05/22 12:23pm
dealer info
Figure 5. Notifications - Critical

14
When reminders occur, they will also be displayed under notifications as illustrated in figure 6. Press
the clear or remind later to redisplay active reminder for 1 day, 1 week, 1 month, 3 months or a custom
date.
notifications
critical
media filter
<
reminders
05/22 12:23pm
Clear remind later
Figure 6. Notifications - Reminders

15
PERFORMANCE REPORT
This will display the total number of hours each
month that the system has been running. Example
would be for mar (March) 23H or 23 hours. To re
turn to the menu screen, press the house icon in
the upper left-hand corner of the screen.
EDIT SCHEDULES
edit schedules
>
schedule 1
schedule 2
schedule 3 >
>
<
Figure 7. Edit Schedules Screen
NOTE: See Selection Mode on page 10 to run a
specific schedule.
From the HOME screen press the MENU and
press edit schedules option.
The edit schedules screen will allow section of up
too three separate schedules. On the edit sched
ules screen, each schedule can be renamed and
edited. See Figure 8 for editing schedules.
NOTE: If a fan mode is selected under the select
mode screen, it will over-ride any fan setting in in
dividual schedules.

16
edit schedules
schedule 1
schedule 2
schedule 3
schedule x
(rename)
select days
select mode
select days
individual days
week/weekend
all 7 days
select mode
heat/cool
heat only
cool only
individual
days
monday
tuesday
wednesday
thursday
friday
saturday
sunday
wake
leave
home
night
week /
week
end
week
weekend
all 7 days all days
wake
(rename)
time
cool-to
heat-to
fan
cool-to
and/or
heat-to
time
fan
select fan mode
select time or
delete period
If period
deleted
* A maximum of four time periods can be used. If
any time periods are deleted, an option to add a
time period back will appear on this screen.
*
Figure 8. Renaming and Editing Schedules

17
SETTINGS (USER)
user settings
>
fan
heat/cool
humidity >
>
<
reminders
general
display
>
>
>
Figure 9. User Setting Options
Table 3. User Settings (Fan)
Setting
Selection Function Description
fan on, auto and
circulate
See table 2 for
detail descrip
tion.

18
Table 4. User Settings (Heat/Cool, Cool Only and Reminders)
Setting Selection Function Description
heat / cool (either heat pump,
gas or electric heating is select
ed)
normal
Heats home to desired tempera
ture setting. Options are on or
off.
comfort
If system is two-stage heating or
cooling, then 2nd stage is lock in
unit demand is satisfied.
emergency heat
Bypasses the first stage of
heating (any stage[s] of heat
pump heating) and goes directly
to the heat stage used for
maximum heating to more
quickly warm a very cold house.
setpoint range
Heating limits with a default of
90°F. Range is 45°F to 90°F.
Cooling limits with a default of
45°F. Range is 45°F to 99°F.
cool only (option only appears
if no heating equipment is avail
able or configured)
setpoint range Cooling limits with a default of
45°F. Range is 45°F to 99°F.

19
Table 5. User Settings (Humidity)
Setting
Selection Function Description
humidity -
Allows section
of humidity
mode which
are humidifier
only,
dehumidifier
only and both
(humidifier +
dehumidifier).
(option only
available if
equipment
installed and
configured.)
humidify
Options are
ON and OFF.
Allows humidi
ty setting ad
justment be
tween 15% to
45%. Default
is 45%.
dehumidify
Options are
On and OFF.
Allows dehu
midity adjust
ment setting
between 45%
to 60%. De
fault is 50%.
Table 6. User Settings (Reminders)
Setting
Selection Function Description
reminders -
Items on this
list are by de
fault disable.
media filter
(air filter) Options for
each reminder
is disabled
(default),
3mon, 6mon,
12mon,
24mon or a
custom dura
tion by specif
ic date can be
set.
Once set a
“expires on xx/
xx/xx (date)
will be dis
played next to
the function.
humidity pad
routine system
check up
uv lamp
metal insert
for pureair
custom
reminder1*
custom
reminder2*
*Custom reminders 1 or 2 may have been re
named by the installer.

20
Table 7. User Settings (General)
Setting Selection Function Description
general - provides
information about
the thermostat and
settings for screen
lock, date & time
and language.
about
Displays information concerning thermostat
model number, serial number, hardware and
software revisions.
screen lock
Setting options are unlocked, partially, and
locked.
To set partially lock, create a three digit code.
Partially lock restricts access to accessing the
menu.
To set locked, create a three digit code. Lock
restricts access to accessing anything on the
screen.
NOTE: Partially Lock and Locked is set for one
instance only. Either would need to be set each
time it is desired to partially locked or locked the
screen. Master unlock code is 864 in case the
custom code is forgotten.
date & time Settings for 24-hour clock (military), daylight
savings, set time and date.
language Languages available are English, Spanish,
Portuguese and French.