Lennox ComfortSense 7500 Assembly instructions

Installation and Setup

Guide

Color Touchscreen

Programmable Commercial

Thermostat

ComfortSense®7500

Model: C0STAT06FF1L

Cat: 13H15

507506-01

10/2015

Supersedes 8/2015

Table of Contents

Shipping and Packing List 2...........

ComfortSense

®7500 Thermostat 3.....

Features 3.........................

INSTALLATION

Installing Thermostat 5...............

Wiring Thermostat 9.................

SETTINGS

Menu 10...........................

Installer Settings 10..................

Dehumidify 28......................

Unit Part (Catalog) and Serial

Number 32.........................

Memory Protection 32................

Appendix A. Humiditrol 34.............

Appendix B. Diagnostic Information 34..

Appendix C. Reminder Information 37...

Appendix C. Supported

Configurations 38....................

Appendix D. Installer Checklist 40......

Shipping and Packing List

1 - ComfortSense

®7500 touchscreen, 7-day

programmablethermostat with back plate

1 - Wall plate

2 - Mounting screws (M3.5x25mm self-tapping

screws)

2 - Wall anchors

1 - Warranty sheet

1 each - User and Installer Guides

IMPORTANT

Read this manual before programming the ther

mostat.

Use this thermostat only as described in this

manual.

ComfortSense®7500 Commercial

Thermostat (C0STAT06FF1L)

(Catalog No. 13H15)

Description

The ComfortSense®7500 commercial thermostat

(C0STAT06FF1L) is an electronic 7-day universal

multi‐stage programmable touch screen

thermostat. It also offers enhanced capabilities

which include:

Sdehumidification measurement and control,

Sequipment maintenance reminders,

Sworry-free memory storage feature,

Smenu-driven touch-screen display.

This thermostat supports heat pumps (single or

two stage) or non-heat pump units, with up to:

Stwo auxiliary stages

Stwo stages of heating and two stages of

cooling.

Unit Dimensions (H x W x D)

Case dimensions: 3-5/16 x 4-5/16 x 7/8 in. (84 x

110 x 22mm)

Wall Plate Dimensions (H x W)

Plate dimensions: 4-1/2” x 5-3/4” (114 x 146mm)

Features

Compressor Short Cycle Protection

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.

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

(compressor cooling), or flame (compressor

heating) in the display.

Internal and External Temperature Sensors

See information starting on page 11 for sensor

wiring and configuring sensor settings under

Installer Settings menu.

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.

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 resi

dential units and approved commercial split‐

system matches, and those which meet the fol

lowing installation criteria:

Sinstallation uses 18 GAUGE thermostat

wire or larger,

Sthermostat wire run length DOES NOT

EXCEED 300' (91m),

Sload 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.

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.

1. Shut off all power to system before installing.

2. Read this entire document, noting which

instructions pertain to your equipment and

system requirements.

3. Make sure that all wiring conforms to local

and national building and electrical codes and

ordinances.

4. 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).

5. Ensure load from any thermostat connection

is less than 1 AMP.

DO NOT

1. Install On voltages higher than 30VAC.

2. 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.

3. Install on outside walls or in direct sunlight.

4. 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:

SDrafts or dead spots behind doors

and in corners.

SNot close to entrance or automatic

doors.

SNot close to heat generating

equipment such as kitchen

equipment.

SNot in an enclose environment unless

a remote indoor sensor is used.

SHot or cold air from ducts.

SRadiant heat from sun or appliances.

SConcealed pipes and chimneys.

SUnheated (uncooled) areas such as

an outside wall behind the thermostat.

Figure 1. 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”

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

1/4”

TRIM 1/4” INSULATION FROM

END OF EACH WIRE

USE UNIT WALL PLATE AS TEMPLATE TO MARK

DESIRED MOUNTING HOLE LOCATIONS ON WALL

(USE A LEVEL) ALIGN WALL PLATE

DRILL 3/16” HOLES AT MARKED LOCATIONS

ON WALL FOR WALL ANCHORS

NOTE: INSTALLATION OF WALL PLATE

IS OPTIONAL.

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.

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.

WIRING THERMOSTAT

Below are the terminal designations and a general

description of their purpose.

1. Connect wiring between thermostat, indoor

and outdoor units.

2. Connect internal and external sensors if

applicable. See information starting on page

11 for sensor wiring and configuring sensor

settings under the Installer Settings menu.

NOTE - Wire run should not exceed 300 feet

(100m).

3. Seal the hole in the wall with a suitable

material to prevent drafts from entering the

thermostat case.

4. Configure thermostat and equipment for

system type, program the thermostat, and

test system.

TERMINAL DESIGNATIONS

Ti - Remote indoor temperature sensor

Tc - Sensor common terminal

To - Outdoor or discharge air temperature

sensor

Ec - Economizer/Time-of-Day (TOD)

output-powered via R terminal.

D - Dehumidification relay

W2 - Second-stage heating (non-heat pump) or

fourth-stage (heat pump)

Y2 - Second-stage heating or cooling

O - Cool active reversing valve

B - Heat active reversing valve

C - Common 24VAC

G - Fan relay

W1 - First-stage heating (non-heat pump or

emergency heat) or third-stage heating

(heat pump)

Y1 - Compressor output

R - 24VAC power

Settings

performance report

notifications 13

edit schedules

settings

Figure 2. Menu Screen

1. Touch menu option from the home screen.

2. Touch and hold the settings option on the

menu. This will display the installer settings

notice and then menu.

installer settings

confirm

installer settings must be set

by qualified person.

Figure 3. Installer Menu Screen Confirmation

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