Lennox ComfortSense 7500 Assembly instructions

Installation and Setup
Guide
Color Touchscreen
Programmable Thermostat
ComfortSense®7500 (13H14)

2
Table of Contents
Shipping and Packing List 2...............
ComfortSense®7500 Thermostat 3........
Features 3.............................
Thermostat Installation
Mounting Thermostat 6...................
Wiring Thermostat 11.....................
Installer Settings
Menu (Installer Settings) 21...............
Humidity 37.............................
Dehumidity 38..........................
Unit Part (Catalog) and Serial Number 41....
Memory Protection 41....................
Appendix A. Flow Diagrams 42............
Appendix B. Diagnostic Information 43......
Appendix C. Supported Configurations 47...
Appendix D. Installer Checklist 49..........
Shipping and Packing List
1 - ComfortSense
®7500 touchscreen, 7-day
programmablethermostat and back plate
2 - Mounting screws (M3.5x25mm self-tapping
screws)
2 - Wall anchors
1 - Wall plate
1 - Warranty certificate
1 each - Homeowner and Installer Guides
NOTE - This thermostat is equipped with
automatic compressor protection to prevent
potential damage due to short cycling or extended
power outages. The short-cycle protection
provides a 5-minute delay between heating or
cooling cycles to prevent the compressor from
being damaged.
IMPORTANT
Read this manual before programming the ther
mostat.
Use this thermostat only as described in this man
ual.

3
ComfortSense®7500 Thermostat (Catalog
No. 13H14)
Description
The ComfortSense®7500 thermostat is an
electronic 7-day universal multi‐stage
programmable touch screen thermostat. It also
offers enhanced capabilities which include:
humidification measurement and control,
dew point adjustment control,
dehumidification measurement and control,
Humiditrol
®Enhanced Dehumidification
Accessory (EDA) capability,
equipment maintenance reminders,
worry-free memory storage feature,
menu-driven touch-screen display.
This thermostat supports heat pump or non-heat
pump units, with up to two stage heat pump and
two auxiliary stages or two stages of heating and
two stages of cooling.
Dimensions (H x W x D)
Case dimensions: 3-5/16 x 4-5/16 x 7/8 in. (84 x
110 x 22mm)
Features
Compressor Short-Cycle Protection
A 5-minute compressor short-cycle protection
timer begins when a compressor output is
de-energized. Also, if a power loss occurs, the
system will go into compressor protection mode
and display “waiting” next to either a snow flake
icon (compressor cooling), or flame icon
(compressor heating) in the display.
Outdoor Temperature Sensor
An outdoor temperature sensor (X2658) is
required for dual fuel applications, balance points,
dew point humidity control, and with Humiditrol®
EDA.
In addition to measuring and displaying outdoor
temperature, the outdoor sensor provides dew
point adjustment and control for all models. If used
with this thermostat, the sensor enables optimal
heating equipment operation via programmable
balance points.

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NOTE - The outdoor sensor uses standard
thermostat wiring; it may be wired using two wires
of a multi-wire cable.
When the outdoor sensor is connected, the
outdoor temperature on the home screen can be
displayed.
NOTE - For proper operation of Humiditrol®EDA
applications, the outdoor sensor (X2658) MUST
be installed.
Figure 1. Outdoor Sensor
For detail installation requirements and
procedure, refer to the instruction provided with
the kit.
IMPORTANT
The outdoor sensor must be connected to oper
ate a system with a Humiditrol®accessory.
Installing Remote Outdoor Sensor
Install the remote outdoor sensor on a northern
wall of the home, away from direct sunlight or other
heat sources that may affect its sensitivity.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed by a
licensed professional HVAC installer (or equiv
alent) or service agency.

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CAUTION
This is a 24VAC low-voltage thermostat. Do not
install on voltages higher than 30VAC.
Do not short (jumper) across terminals on the
gas valve or at the system control to test instal
lation. This will damage the thermostat and void
the warranty.
IMPORTANT
In all applications, the ComfortSense®Model
7500 thermostat can only be used with all
residential units and approved commercial
split‐system matches, and those which meet
the following installation criteria:
installation uses 18 GAUGE thermostat
wire or larger,
thermostat wire run length DOES NOT
EXCEED 300' (91m),
load from any thermostat connection is 1
AMP or LESS.
CAUTION
Always turn off power at the main power source
by switching the circuit breaker to the OFF posi
tion before installing or removing this thermo
stat.
All wiring must conform to local and national
building and electrical codes and ordinances.

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THERMOSTAT INSTALLATION
Before beginning installation, note the type of
equipment, number of stages, and any
accessories being installed. This thermostat is a
24VAC low-voltage thermostat and requires a
common wire to the thermostat to operate.
DO
Shut off all power to system before installing.
Read this entire document, noting which
instructions pertain to your equipment and
system requirements.
Make sure that all wiring conforms to local
and national building and electrical codes and
ordinances.
Use thermostat wire between the thermostat
and the optional outdoor temperature sensor
(may be separate wire pair or two wires of a
multi-wire cable).
Ensure load from any thermostat connection
is less than 1 AMP.
DO NOT
Install on voltages higher than 30VAC.
Short (jumper) across terminals on the gas
valve or at the system control to test
installation. This will damage the thermostat
and void the warranty.
Install on outside walls or in direct sunlight.
Exceed thermostat wire run length greater
than 300 feet (91m).
INSTALLING THERMOSTAT
1. Unpacked the thermostat and open the case
with a thin-blade screwdriver. Place between
wall base and unit and twist to separate unit
from base.
2. Select a location for the thermostat about 5
feet (1.5m) above the floor in an area with
good air circulation at average temperature.
3. Do not install the thermostat where it can be
affected by:
 Drafts or dead spots behind doors
and in corners.

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 Not close to entrance or automatic
doors
 Not close to heat generating
equipment such as kitchen equipment
 Not in an enclose environment unless
a remote indoor sensor is used.
 Hot or cold air from ducts.
 Radiant heat from sun or appliances.
 Concealed pipes and chimneys.
 Unheated (uncooled) areas such as
an outside wall behind the thermostat.
Figure 2. Removing Back Plate
4. Use steps Athrough J (step Japplicable
when using provided wall plate) to install the
thermostat.
CUT OR DRILL A SMALL HOLE
FOR THERMOSTAT WIRING
¾” x ¾”
A
B
PULL ABOUT 3” OF THERMOSTAT
WIRE THROUGH OPENING AND RE
MOVE OUTER THERMOSTAT WIRE
JACKET.
THIS WILL HELP IN
ROUTING THE THER
MOSTAT WIRING TO
THE PROPER THER
MOSTAT TERMINALS

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1/4”
TRIM 1/4” INSULATION FROM
END OF EACH WIRE
C
USE UNIT WALL PLATE AS TEMPLATE TO MARK
DESIRED MOUNTING HOLE LOCATIONS ON WALL.
D
(USE A LEVEL) ALIGN WALL PLATE
DRILL 3/16” HOLES AT MARKED LOCATIONS
ON WALL FOR ANCHORS
E
NOTE: INSTALLATION OF WALL PLATE IS
OPTIONAL.

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Thermostat Installation with Wall Plate
F- Place wall plate over
holes in wall.
G- Insert wall anchors
through wall plate into wall.
H - Attach back plate to wall
plate.
I- Insert provided screws through back
and wall plates into wall anchors.
J- Attach thermostat to
back plate.

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Thermostat Installation without Wall Plate
G- Place back plate
over wall anchors in wall.
F- Insert wall anchors
through wall plate into wall. H- Insert provided screws through
back plate into wall anchors.
I- Attach thermostat to
back plate.