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Lennox ComfortSense 3000 Series Operation Manual

Non-programmable thermostat
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E2008 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE

L3011C Thermostat

The Lennox ComfortSenset 3000 Series 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 pro-
grammable filter change reminder, and a system check in-
dicator 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 Lennox model
L3011C thermostat. Refer to the installation manual for
instructions regarding installation and wiring of the thermo-
stat.
02/08
*2P0208*
All manuals and user guides at all-guides.com
OPERATION MANUAL
ComfortSenset 3000 Series
Model No. L3011C
Non-Programmable Thermostat
CONTROLS
506079−01
02/08
Supersedes 504,865M

Table of Contents

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Initial Thermostat Power-up

When power is initially applied to the thermostat, the dis-
play will appear as shown in figure 1.
88
ROOM
SETPOINT
Figure 1. Display − Initial Power−Up
All display segments are momentarily activated. This oc-
curs 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).
*P506079-01*
Litho U.S.A.
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FILTER
SERVICE
FAN
ON
88
AUTO
SYSTEM
COOL
OFF
EMG.
HEAT
506079−01
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Summary of Contents for Lennox ComfortSense 3000 Series

  • Page 1: Table Of Contents

    Figure 1. Display − Initial Power−Up Introduction This document describes the operation of Lennox model All display segments are momentarily activated. This oc- L3011C thermostat. Refer to the installation manual for curs as a normal part of thermostat initialization. Within a...

  • Page 2: Heating Control

    All manuals and user guides at all-guides.com If the thermostat is in heat mode, heat mode is disabled when the HEAT button is pressed. This is indicated by OFF ROOM in the SYSTEM box as shown in figure 5. AUTO ROOM SYSTEM AUTO...

  • Page 3: Adjusting Temperature Setpoint

    All manuals and user guides at all-guides.com Cooling Demand Use the UP or DOWN arrow keys to adjust the setpoint up or down. The setpoint will increase by 1°F each time the The thermostat must be in cool mode in order to properly control the cooling equipment.

  • Page 4: Filter Reminder

    All manuals and user guides at all-guides.com Filter Reminder FILTER The L3011C thermostat includes a filter reminder feature. ROOM The filter reminder can be set for 1, 3, 6, or 12−month inter- vals. The SETTINGS button, located behind the door on the right−hand side of the thermostat is used to set the filter AUTO reminder interval.

  • Page 5: Thermostat Reset

    All manuals and user guides at all-guides.com Temperature Setpoint Range Thermostat RESET Setting range: 50°F (10°C) to 90°F (32°C) Under some abnormal conditions, it may be desirable to Setting resolution: 1°F (1°C) reset" the thermostat to its default condition. This can be Fan Control useful on rare occasions when the the thermostat is behav- AUTO or ON modes, gas or electric heat compatible via...

  • Page 6: Thermostat Output Table

    All manuals and user guides at all-guides.com Power Loss/Recovery Thermostat Output Table Thermostat memory is retained for a minimum of 24 hours Table 2 depicts the L3011C thermostat output states for during a power loss (includes retention of programmed various input conditions. temperature setpoint, heat/cool and fan mode settings, fil- Table 2.

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Comfortsense l3011c