Lennox ComfortSense 7500 User Manual

507503-02

6/2018

Supersedes 5/2017

ComfortSense® 7500 Thermostat

User Guide

2

Table of Contents

Features................................................................2

Home Screen Temperature Indicator .................3

Home Screen Information ...................................3

Operating Mode Selection ..................................6

Fan Operation ................................................................ 6

User Menu Screen ...............................................7

Notications .................................................................... 7

Reminders ...................................................................... 8

Performance Report ....................................................... 8

Edit Schedules ............................................................... 8

User Settings Menu ...........................................10

Features

The ComfortSense® 7500 Series thermostat is an
electronic 7-day, universal, multi-stage, programma­ble, touchscreen thermostat. It also offers enhanced
capabilities including humidication/dehumidica­tion/dew point measurement and control, Humidit­rol® EDA (Enhanced Dehumidication Accessory)
control, and equipment maintenance reminders.

• Large, clear color display that shows the current

and set temperature, time, indoor relative
humidity and outdoor temperature (if optional
outdoor sensor is installed and enabled).

• Dehumidication measurement and control.

• Humiditrol® EDA capability.

• Dew point adjustment control.

• Ergonomic design.

• Smooth Setback Recovery starts system early to

achieve setpoint at start of program period.

• Compressor short-cycle protection (5 minutes).

• Real-time clock keeps time during power failures

and automatically adjusts for daylight savings
time and leap year.

• Maintenance reminders let user know when
to service or replace lters, humidier pads,
ultraviolet lamps, plus two user or installer dened
custom reminders.

• Program Hold options allow user to override the
program schedule as desired by time and date.

• Select individual days or groups of days to set
programming.

• Programmable fan offers increased performance
when combined with whole home indoor air
quality products.

3

Home Screen Temperature 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

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 area where no system

demand is active. In gure 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

temperature on the temperature dial indicator.

Home Screen Information

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

Touch the screen to turn on the back-light if it is off.
A. OPERATING MODE - touch to access the

screen that will list available modes. Selectable
modes are heat/cool, heat only, cool only, off,
emergency heat, 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 temperatures
when away from home. Touch cancel to exit
this screen and return to the home screen and

normal system operations.
C. Displays current time.
D. Menu - This will allow access to notications,

performance report, schedules and settings.

4

E. This allows you to set the heat-to (if enabled)

temperature. Selecting the heat-to or
temperature dial position indicator will take you
to the temperature setting detail screen. The
temperature 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
temperature 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 percentage

in the home along with a humidity icon (rain
drop). The icon changes based on the humidity
level in the home.

H. This location could display the outdoor

air temperature. What is displayed in that
location depends on what sensor is installed
and congured through the thermostat user
interface. If neither is installed, then this area
will be blank.

I. Displays the current indoor temperature.

J. Indicates the schedule is on hold until the next

time period or permanent.

• Place the schedule on hold by touching 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.

• After approximately three seconds the
screen will display the override setting
options.

• From the override setting screen, the
options are 1 hour, 2 hour or next scheduled
period. Make selection and then touch set.

• For the 1 or 2 hour setting the home
screen will indicate schedule hold until time
indicated (i.e., 11:57 pm). To exit schedule
hold, touch X

• When until next period is selected, the set
point will be kept until the next program
schedule period. To exit until next period,
touch X.

K. System Status Icons - Equipment operation

information appears along the left side of the
home screen. The displayed icons will indicate
cooling or heating demand, cooling compressor
delay, or cooling demand.

Table 1. System Status Icons

Icon

Description

NOTE: Touching the icon will display a

text description.

Humidifying icon is displayed when
humidifying is occurring. Touching on the
icon will display humidifying next to the
icon.

Dehumidifying icon is displayed when
dehumidifying is occurring. Touching the
icon will display dehumidifying next to the
icon.

Red ames indicates the system is
heating.

Blue ames indicates the system is
cooling.