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Lennox ComfortSense L3532H Operation Manual

3000 series 5/2 day
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See also: Instruction and Installation Manual
Enlarged version
E2008 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
L3532H 5/2 Day Programmable
Thermostat
The Lennox ComfortSenset 3000 Series model L3532H
5/2 day programmable electronic thermostat has a large,
easy-to-read display and provides excellent temperature
control. It includes a programmable filter change reminder,
an equipment maintenance reminder, and a system check
indicator to notify the user when the equipment requires
service.
Thermostat model L3532H is suitable for heat pump,
3-stage heat/2-stage cool applications using a gas or
electric auxiliary heat source. An optional outdoor
temperature sensor provides auxiliary heat lockout,
balance point operation, and dual−fuel compatibility.

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
L3532H thermostat. Refer to the installation manual for
instructions regarding installation and wiring of the thermo-
stat.

Initial Thermostat Power-up

When power is initially applied to the thermostat, the dis-
play will appear as shown in figure 1.
02/08
*2P0208*
OPERATION MANUAL
ComfortSenset 3000 Series
Model L3532H 5/2 Day
Programmable Thermostat
CONTROLS
506074−01
02/08
505,050M
Supersedes

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MO TU WE TH FR SA SU
I8:88
AM
PM
PROG
A | B | C | D
ROOM
88
SETPOINT
°
88
Figure 1. Initial Power−Up Display
All display segments are momentarily activated. This oc-
curs as a normal part of thermostat initialization.
*P506074-01*
Litho U.S.A.
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MAINT
FILTER
SERVICE
FAN
HOLD
ON
AUTO
SYSTEM
COOL
°
OFF
EMG.
Hi
Lo
HEAT
506074−01
1
1
1
1
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Summary of Contents for Lennox ComfortSense L3532H

  • Page 1: Table Of Contents

    SYSTEM ROOM Introduction SETPOINT COOL ° This document describes the operation of the Lennox model ° EMG. L3532H thermostat. Refer to the installation manual for HEAT instructions regarding installation and wiring of the thermo- stat.

  • Page 2: Buttons, Backlight, Timers & Settings

    Within a few seconds, the Home Screen appears (see fig- ure 2) with default settings as shown. After about 1 minute of initialization time, the actual room temperature will be Heat Cool displayed. NOTE − Tables 2 and 3 on page 8 show all system and Prog Day/Time programming defaults.

  • Page 3: Heat − Heat Mode

    HEAT − Using the Heat Mode SYSTEM ROOM SETPOINT ° COOL Normal Heat Mode ° In normal heat mode, both the heat pump and the backup HEAT heat source are used to provide heat. If the thermostat de- tects that the heat pump is not able to provide enough heat (as may be the case in very cold weather), then the backup Figure 6.

  • Page 4: Cool − Cool Mode

    Cooling Demand COOL − Using the Cool Mode Set the thermostat to cool mode to control the cooling Enabling and Disabling Cool Mode equipment. Then, if the room temperature is higher than the temperature setpoint, as shown in figure 11, the ther- Use the COOL button to enable or disable cool mode as mostat detects a cooling demand and will activate the cool- desired.

  • Page 5: Hold − Temperature Hold Mode

    PROG − Thermostat Programming HOLD − Using Temperature Hold Modes The L3532H thermostat can be programmed to perform a When HOLD is displayed at the HOME screen, the ther- set of either heating or cooling events (but not a mostat is in a temperature hold condition. This means that combination of heat and cool) for 5 consecutive days using the temperature program data is ignored and the thermo- a set of 4 unique events per day.

  • Page 6: Fan − Controlling Fan Operation

    5. Repeat steps 2 through 4 for periods B, C, and D. For MAINT, MAINT 6. Repeat steps 1 through 5 for the 2−day program. press Settings FILTER button 2 times NOTE − This thermostat will NOT automatically switch from heating to cooling, or vice versa; operator involve- For FILTER, press Settings ment is required.

  • Page 7: Settings − Balance Point

    TU WE TH FR SA SU SETTINGS − Balance Point FILTER I0:i4 SERVICE NOTE − The balance point is only available with the out- door sensor. If the optional outdoor sensor (X2658) is connected to the thermostat, balance point adjustment is available. The bal- AUTO PROG A B C D...

  • Page 8: Technical Specifications

    Default Thermostat Settings CAUTION 24VAC is present on the terminals of the thermostat Default thermostat settings are shown in table 2 and the bracket. If removing the thermostat from the wall, default program is shown in table 3. use caution and avoid touching any of the connec- tor terminals on the wall bracket.
  • Page 9 Smart Setback Recovery (via DIP switch #6) Equipment Protection Override Smart Setback Recovery (SSR) affects the way the ther- Both the minimum compressor OFF timer and the mini- mostat responds to program events. If SSR is disabled, the mum equipment cycle timer can be over−ridden by press- thermostat will react to a program event at the time the ing and holding either the HEAT or COOL button down for 4 event occurs.

  • Page 10: Thermostat Output Table

    Table 5. L3532H Thermostat Outputs Thermostat Output Table Demand Condition Table 5 depicts the L3532H thermostat output states for Cooling Demands various input conditions. The following notes described SMALL terms used in the table. LARGE NOTES: No Demand S X = output is activated with 24VAC. Heating Demands S BBP: outdoor temperature is below balance point w/Electric Backup...

This manual is also suitable for:

Comfortsense 3000 series

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