Table Of Contents - Lennox L7742U Programming And Application Manual

Table of Contents

ComfortSenset Model L7742U Thermostat
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display Fields & Touch Screen Points
Home Screen Current Conditions & Temperature Settings
Controlling the Heat/Cool Modes of Operation
Controlling the Fan Operation
Schedule Screen Programming
Options screen Reminders & User Settings
Options screen Installer Settings
Resetting Program to Factory Conditions
®
EPA ENERGY STAR Recommended Setpoints
Humidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
®
Humiditrol Enhanced Dehumidification Accessory (EDA)
Stage Delay and Differential Settings
Temporary Temperature Change Pause the Schedule
Remote Outdoor Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Memory Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Date Code & Serial Number
Appendix A. Flow Diagrams & Wiring Diagrams
Appendix A. Diagnostic Information & Hidden Menu Tables
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 be-
ing damaged.
506061−01 06/08
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Always turn off power at the main power source by switching
3
the circuit breaker to the OFF position before installing or re-
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moving this thermostat.
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6
All wiring must conform to local and national building and elec-
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trical codes and ordinances.
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Do not switch system to cool if the outdoor temperature is be-
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low 45°F (7°C). This can damage the cooling system.
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This is a 24VAC low−voltage thermostat. Do not install on volt-
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ages higher than 30VAC.
30
Do not short (jumper) across terminals on the gas valve or at the
30
system control to test installation. This will damage the thermo-
stat and void the warranty.
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Read this manual before programming this thermostat.
Use this thermostat only as described in this manual.
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WARNING
CAUTION
IMPORTANT