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Honeywell T8635L User Manual

Honeywell T8635L
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1 69-1332—3
USER’S GUIDE
T8635L Microelectronic Communicating
Programmable Thermostat
69-1332-3

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Questions and Answers:

Honeywell T8635L Specifications

General IconGeneral
Power SourceBattery or Hardwired
ProgrammableYes
Power MethodBattery or Hardwired
MountingWall Mounted
ColorWhite
DisplayDigital
Temperature Differential1°F
Control TypeDigital

Summary

Using This Guide

Features

Keyboard and Display Description

Keyboard

Details the physical keys on the thermostat cover and next to the display.

Display

Explains the information shown on the thermostat display screen.

Adaptive Intelligent Recovery™ Control

Optimum Comfort and Energy Savings

Details how Adaptive Intelligent Recovery™ optimizes comfort and saves energy.

Operating Your Thermostat

Setting System and Fan Keys

Instructions for setting the heating/cooling system and fan modes.

Setting the System Key

How to select Heat, Off, Cool, or Auto system modes.

Setting the Fan Key

How to set the fan to Auto or On operation.

Setting Temporary Temperatures

How to temporarily adjust temperature settings.

Changing Temperature to Temporary Setting Until Next Schedule Period

Temporarily override current schedule until next period.

Changing and Holding Temperature Setting Indefinitely

How to set a permanent temperature hold.

Changing Temperature Setting Until a Designated Day and Period (Vacation Hold)

Setting a temporary hold for a specific duration like vacation.

Using the i (Information) Key

Displaying Outdoor Temperature

How to view the outdoor temperature if sensor is equipped.

Displaying Current Settings

How to check current temperature setpoints and modes.

Filter Indicator

Setting or Resetting Filter Indicator

How to set or reset the filter change reminder.

LED Indicators

Remote Override Temperature Indicator

Indicates when temperature is overridden remotely.

Setting the Clock

Setting Current Day and Time

How to set the current day and time on the thermostat.

Daylight Saving Time

How to adjust the thermostat for Daylight Saving Time.

Programming Your Thermostat

7-Day Program and Operation

Overview of 7-day programming and its four periods.

7-Day Preprogrammed Schedule

Details the default preprogrammed schedule for all days.

Customizing Your Own 7-Day Schedule

Table for planning and customizing a custom 7-day schedule.

Programming the First Day

Steps to begin programming the thermostat's schedule for a day.

Copying a Day

Clearing a Program Period

Troubleshooting

Display Issues

Troubleshooting problems with the thermostat display not showing information.

Temperature Setting Problems

Resolving issues where temperature settings do not change or heating/cooling fails.

System Indicator and Airflow Issues

Diagnosing problems with system indicators, no air from registers, or filter alerts.

Communication and Recovery Timing Issues

Addressing 'no com' errors, zoning delays, and early heat/cool activation.

Warranty

Customer Assistance

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