Lennox International Inc user manual 81M26 81M27 81M28

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110-1052F 5/12/05 11:59 AM Page 1

81M26

81M27

81M28

DELUXE

PROGRAMMABLE

THERMOSTATS

with Humidity Control

User's Manual

Menu Driven Display

Fully Programmable

24 VAC with Worry-Free Memory Storage

1 Heat / 1 Cool, 2 Heat / 2 Cool and Heat Pump Models

110-1052F
504, 684M	Five Year Warranty

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Contents 81M26 81M27 81M28 Do not USE with Commercial Equipment Important Safety InformationTable of Contents Menu How do I change the time of day and day of the week?How do I turn on the heating or cooling cycles? How does Intermittent FAN work? How do I cycle the fan?SET Temperature AT How do I temporarily change the temperature?70 ˚ Can I set a temporary adjustment for longer than 3 hours?70 ˚ How do I return to the Program Mode after being in HOLD?How do I set the Vacation Mode? 70˚Day to be set the same. MON-FRI allows for weekday How do I program my thermostat?SET Cool Monday Program How do I copy one day’s program to another day?How do I know what program is right for me? What is an event?How do I set the Dehumidify Levels? What is the difference between Basic and Precision modes?What is the Dew Point Adjustment Function? What happens if the mode is set to OFF?Can I change the Humidifier Maintenance Service Intervals? Or C What are the User settings?Setpoint Temperature Clock SettingsNumber of Events PER DAY Differential Settings More Detailed Information on the User SettingsSecurity Settings When would I need to change the User settings?Security Code System Setup What are the Installer settings?Auxiliary Heat Installer settingsResidual Cool Balance PointsDeadband Setpoint Energy Efficient RecoveryHumiditrol Service Monitor Menu When would I need to change the Installer settings?Temperature Offset Contact InformationWhere should I install a remote outdoor sensor? How does Energy Efficient Recovery EER work?How does my remote outdoor sensor work? What do the lights below the display mean?How do I know if the heating or cooling is on? What should I do if my power goes out?Who do I contact for more information? My energy bills are too high. Is there anything I can do? 504, 684M