Lennox ComfortSense 3000 Series Operation Manual

2018 Lennox Industries Inc.
©
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE OWNER
FOR FUTURE REFERENCE

L3011C Thermostat

This thermostat, model L3011C non-programmable
electronic thermostat is easy-to-use, has a large, easy-to-
read display, and provides excellent temperature control.
The thermostat also includes a programmable filter
change reminder, and a system check indicator which will
notify the user of the need for equipment service.
Thermostat model L3011C t is suitable for non-heat
pump, single-stage heat/single cool applications that are
matched with a gas or electric furnace.

General

These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.

Introduction

This document describes the operation of the Lennox
model L3011C thermostat. Refer to the installation manual
for instructions regarding installation and wiring of the
thermostat.
OPERATION MANUAL
ComfortSense
Model No. L3011C
Non-Programmable
CONTROLS
506079-02
9/2018
Supersedes 5/2017

Table of Contents

L3011C Thermostat ........................................................1
General ...........................................................................1
Introduction .....................................................................1
Initial Thermostat Power-up ............................................1
Heating Control...............................................................2
Cooling Control ...............................................................3
Adjusting Temperature Setpoint .....................................3
Fan Control .....................................................................3
Filter Reminder ...............................................................4
Service Indicator .............................................................4
Thermostat RESET ........................................................4
Default Thermostat Settings ...........................................4
Technical Specifications .................................................5
Temperature Setpoint Range..........................................5
Fan Control .....................................................................5
Thermostat Output Table ................................................6

Initial Thermostat Power-up

When power is initially applied to the thermostat, the
display will appear as shown in figure 1.
Figure 1. Initial Power-Up Display
All display segments are momentarily activated. This
occurs as a normal part of thermostat initialization. Within
a few seconds, the display will appear as shown in figure
2 (figure shows temperature in Fahrenheit units).
3000 Series
®
Thermostat